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[openeuler:OLK-5.10 2588/2588] arch/x86/kvm/x86.c:893:6: sparse: sparse: symbol 'kvm_post_set_cr0' was not declared. Should it be static?
by kernel test robot 21 Dec '24

21 Dec '24

Hi Yu, FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant. tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: e804413fbbd504bc7b5b84dc7b86307f2b127a83 commit: 1686d271f795f8756b49151978b95b095c0598ad [2588/2588] KVM: x86: Introduce kvm_post_set_cr0 to post handle the CR0 emulation config: x86_64-randconfig-121-20241218 (https://download.01.org/0day-ci/archive/20241221/202412210743.TVhBJ1oK-lkp@…) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241221/202412210743.TVhBJ1oK-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412210743.TVhBJ1oK-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> arch/x86/kvm/x86.c:893:6: sparse: sparse: symbol 'kvm_post_set_cr0' was not declared. Should it be static? arch/x86/kvm/x86.c:3044:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const [noderef] __user * @@ got unsigned char [usertype] * @@ arch/x86/kvm/x86.c:3044:38: sparse: expected void const [noderef] __user * arch/x86/kvm/x86.c:3044:38: sparse: got unsigned char [usertype] * arch/x86/kvm/x86.c:8608:15: sparse: sparse: incompatible types in comparison expression (different address spaces): arch/x86/kvm/x86.c:8608:15: sparse: struct kvm_apic_map [noderef] __rcu * arch/x86/kvm/x86.c:8608:15: sparse: struct kvm_apic_map * arch/x86/kvm/x86.c:11008:32: sparse: sparse: Using plain integer as NULL pointer arch/x86/kvm/x86.c:11061:16: sparse: sparse: incompatible types in comparison expression (different address spaces): arch/x86/kvm/x86.c:11061:16: sparse: struct kvm_apic_map [noderef] __rcu * arch/x86/kvm/x86.c:11061:16: sparse: struct kvm_apic_map * arch/x86/kvm/x86.c:11062:15: sparse: sparse: incompatible types in comparison expression (different address spaces): arch/x86/kvm/x86.c:11062:15: sparse: struct kvm_pmu_event_filter [noderef] __rcu * arch/x86/kvm/x86.c:11062:15: sparse: struct kvm_pmu_event_filter * arch/x86/kvm/x86.c:4134:42: sparse: sparse: self-comparison always evaluates to false arch/x86/kvm/x86.c: note: in included file (through include/linux/notifier.h, include/linux/memory_hotplug.h, include/linux/mmzone.h, ...): include/linux/srcu.h:182:9: sparse: sparse: context imbalance in 'vcpu_enter_guest' - unexpected unlock vim +/kvm_post_set_cr0 +893 arch/x86/kvm/x86.c 892 > 893 void kvm_post_set_cr0(struct kvm_vcpu *vcpu, unsigned long old_cr0, unsigned long cr0) 894 { 895 unsigned long update_bits = X86_CR0_PG | X86_CR0_WP; 896 897 if ((cr0 ^ old_cr0) & X86_CR0_PG) { 898 kvm_clear_async_pf_completion_queue(vcpu); 899 kvm_async_pf_hash_reset(vcpu); 900 } 901 902 if ((cr0 ^ old_cr0) & update_bits) 903 kvm_mmu_reset_context(vcpu); 904 905 if (((cr0 ^ old_cr0) & X86_CR0_CD) && 906 kvm_arch_has_noncoherent_dma(vcpu->kvm) && 907 !kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) 908 kvm_zap_gfn_range(vcpu->kvm, 0, ~0ULL); 909 } 910 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS 1341/1341] mm/sparse.o: warning: objtool: missing symbol for section .init.text
by kernel test robot 21 Dec '24

21 Dec '24

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 commit: 2a3cb8baef71e4dad4a6ec17f5f0db9e05f46a01 [1341/1341] mm/sparse: delete old sparse_init and enable new one config: x86_64-buildonly-randconfig-006-20241220 (https://download.01.org/0day-ci/archive/20241221/202412210532.I31r9MaS-lkp@…) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241221/202412210532.I31r9MaS-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412210532.I31r9MaS-lkp@intel.com/ All warnings (new ones prefixed by >>): mm/sparse.c: In function 'sparse_init_nid': mm/sparse.c:199:27: warning: comparison of unsigned expression in '>= 0' is always true [-Wtype-limits] 199 | ((section_nr >= 0) && \ | ^~ mm/sparse.c:461:9: note: in expansion of macro 'for_each_present_section_nr' 461 | for_each_present_section_nr(pnum_begin, pnum) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ mm/sparse.c:199:27: warning: comparison of unsigned expression in '>= 0' is always true [-Wtype-limits] 199 | ((section_nr >= 0) && \ | ^~ mm/sparse.c:480:9: note: in expansion of macro 'for_each_present_section_nr' 480 | for_each_present_section_nr(pnum_begin, pnum) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ mm/sparse.c: In function 'sparse_init': mm/sparse.c:199:27: warning: comparison of unsigned expression in '>= 0' is always true [-Wtype-limits] 199 | ((section_nr >= 0) && \ | ^~ mm/sparse.c:503:9: note: in expansion of macro 'for_each_present_section_nr' 503 | for_each_present_section_nr(pnum_begin + 1, pnum_end) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ >> mm/sparse.o: warning: objtool: missing symbol for section .init.text -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS 1341/1341] include/linux/kern_levels.h:5:25: warning: format '%p' expects argument of type 'void *', but argument 38 has type 'int'
by kernel test robot 21 Dec '24

21 Dec '24

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 commit: 2d2fe6b40444bd8f84f674930ac5f98a6314702e [1341/1341] ascend: mm: add an owner for mm_struct config: x86_64-randconfig-r052-20241221 (https://download.01.org/0day-ci/archive/20241221/202412210351.AFkLgZJH-lkp@…) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241221/202412210351.AFkLgZJH-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412210351.AFkLgZJH-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from include/linux/printk.h:7, from include/linux/kernel.h:14, from mm/debug.c:9: mm/debug.c: In function 'dump_mm': >> include/linux/kern_levels.h:5:25: warning: format '%p' expects argument of type 'void *', but argument 38 has type 'int' [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:8:25: note: in expansion of macro 'KERN_SOH' 8 | #define KERN_EMERG KERN_SOH "0" /* system is unusable */ | ^~~~~~~~ include/linux/printk.h:342:16: note: in expansion of macro 'KERN_EMERG' 342 | printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~ mm/debug.c:117:9: note: in expansion of macro 'pr_emerg' 117 | pr_emerg("mm %px mmap %px seqnum %llu task_size %lu\n" | ^~~~~~~~ >> include/linux/kern_levels.h:5:25: warning: format '%d' expects argument of type 'int', but argument 39 has type 'long unsigned int' [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:8:25: note: in expansion of macro 'KERN_SOH' 8 | #define KERN_EMERG KERN_SOH "0" /* system is unusable */ | ^~~~~~~~ include/linux/printk.h:342:16: note: in expansion of macro 'KERN_EMERG' 342 | printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~ mm/debug.c:117:9: note: in expansion of macro 'pr_emerg' 117 | pr_emerg("mm %px mmap %px seqnum %llu task_size %lu\n" | ^~~~~~~~ >> include/linux/kern_levels.h:5:25: warning: format '%lx' expects argument of type 'long unsigned int', but argument 40 has type 'const long unsigned int *' [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:8:25: note: in expansion of macro 'KERN_SOH' 8 | #define KERN_EMERG KERN_SOH "0" /* system is unusable */ | ^~~~~~~~ include/linux/printk.h:342:16: note: in expansion of macro 'KERN_EMERG' 342 | printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~ mm/debug.c:117:9: note: in expansion of macro 'pr_emerg' 117 | pr_emerg("mm %px mmap %px seqnum %llu task_size %lu\n" | ^~~~~~~~ >> include/linux/kern_levels.h:5:25: warning: format '%p' expects a matching 'void *' argument [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:8:25: note: in expansion of macro 'KERN_SOH' 8 | #define KERN_EMERG KERN_SOH "0" /* system is unusable */ | ^~~~~~~~ include/linux/printk.h:342:16: note: in expansion of macro 'KERN_EMERG' 342 | printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~ mm/debug.c:117:9: note: in expansion of macro 'pr_emerg' 117 | pr_emerg("mm %px mmap %px seqnum %llu task_size %lu\n" | ^~~~~~~~ vim +5 include/linux/kern_levels.h 314ba3520e513a7 Joe Perches 2012-07-30 4 04d2c8c83d0e3ac Joe Perches 2012-07-30 @5 #define KERN_SOH "\001" /* ASCII Start Of Header */ 04d2c8c83d0e3ac Joe Perches 2012-07-30 6 #define KERN_SOH_ASCII '\001' 04d2c8c83d0e3ac Joe Perches 2012-07-30 7 :::::: The code at line 5 was first introduced by commit :::::: 04d2c8c83d0e3ac5f78aeede51babb3236200112 printk: convert the format for KERN_<LEVEL> to a 2 byte pattern :::::: TO: Joe Perches <joe(a)perches.com> :::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS 1341/1341] include/linux/uaccess.h:112:17: warning: 'spallocinfo' may be used uninitialized
by kernel test robot 21 Dec '24

21 Dec '24

Hi Ding, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 commit: 9469d1759c2905dcef49df7e6240ad5c32b66296 [1341/1341] ascend: share_pool: enable svm to use share pool memory config: arm64-randconfig-002-20241220 (https://download.01.org/0day-ci/archive/20241221/202412210226.N1hHrIDJ-lkp@…) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241221/202412210226.N1hHrIDJ-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412210226.N1hHrIDJ-lkp@intel.com/ Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/char/svm.c:249:21: warning: no previous prototype for 'svm_find_mem_reg_node' [-Wmissing-prototypes] 249 | struct device_node *svm_find_mem_reg_node(struct device *dev, const char *compat) | ^~~~~~~~~~~~~~~~~~~~~ drivers/char/svm.c:419:6: warning: no previous prototype for 'sysrq_sched_debug_show_export' [-Wmissing-prototypes] 419 | void sysrq_sched_debug_show_export(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/char/svm.c:1429:5: warning: no previous prototype for 'svm_get_pasid' [-Wmissing-prototypes] 1429 | int svm_get_pasid(pid_t vpid, int dev_id __maybe_unused) | ^~~~~~~~~~~~~ drivers/char/svm.c:1502:5: warning: no previous prototype for '__svm_get_mpam' [-Wmissing-prototypes] 1502 | int __svm_get_mpam(struct svm_mpam *mpam) | ^~~~~~~~~~~~~~ In file included from arch/arm64/include/asm/atomic.h:34, from include/linux/atomic.h:7, from include/asm-generic/bitops/atomic.h:5, from arch/arm64/include/asm/bitops.h:37, from include/linux/bitops.h:19, from include/linux/kernel.h:11, from include/asm-generic/bug.h:18, from arch/arm64/include/asm/bug.h:37, from arch/arm64/include/asm/memory.h:27, from arch/arm64/include/asm/esr.h:21, from drivers/char/svm.c:10: In function '__cmpxchg_case_mb_4', inlined from '__cmpxchg_mb' at arch/arm64/include/asm/cmpxchg.h:143:1, inlined from 'svm_proc_load_flag' at drivers/char/svm.c:1967:12: arch/arm64/include/asm/atomic_lse.h:492:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'atomic_t[1]' [-Warray-bounds=] 492 | asm volatile( \ | ^~~ arch/arm64/include/asm/atomic_lse.h:523:1: note: in expansion of macro '__CMPXCHG_CASE' 523 | __CMPXCHG_CASE(w, , mb_4, al, "memory") | ^~~~~~~~~~~~~~ drivers/char/svm.c: In function 'svm_proc_load_flag': drivers/char/svm.c:1958:25: note: object 'l2buf_load_flag' of size 4 1958 | static atomic_t l2buf_load_flag = ATOMIC_INIT(0); | ^~~~~~~~~~~~~~~ In function '__cmpxchg_case_mb_4', inlined from '__cmpxchg_mb' at arch/arm64/include/asm/cmpxchg.h:143:1, inlined from 'svm_proc_load_flag' at drivers/char/svm.c:1967:12: arch/arm64/include/asm/atomic_lse.h:492:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'atomic_t[1]' [-Warray-bounds=] 492 | asm volatile( \ | ^~~ arch/arm64/include/asm/atomic_lse.h:523:1: note: in expansion of macro '__CMPXCHG_CASE' 523 | __CMPXCHG_CASE(w, , mb_4, al, "memory") | ^~~~~~~~~~~~~~ drivers/char/svm.c: In function 'svm_proc_load_flag': drivers/char/svm.c:1958:25: note: object 'l2buf_load_flag' of size 4 1958 | static atomic_t l2buf_load_flag = ATOMIC_INIT(0); | ^~~~~~~~~~~~~~~ In file included from drivers/char/svm.c:29: In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'svm_sp_alloc_mem' at drivers/char/svm.c:2144:8: >> include/linux/uaccess.h:112:17: warning: 'spallocinfo' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/compiler.h:251, from arch/arm64/include/asm/memory.h:24: include/linux/kasan-checks.h: In function 'svm_sp_alloc_mem': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/char/svm.c:2135:24: note: 'spallocinfo' declared here 2135 | struct spalloc spallocinfo; | ^~~~~~~~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'svm_get_phy_memory_info' at drivers/char/svm.c:1805:6: include/linux/uaccess.h:112:17: warning: 'para' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'svm_get_phy_memory_info': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/char/svm.c:1800:33: note: 'para' declared here 1800 | struct phymeminfo_ioctl para; | ^~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'svm_remap_proc' at drivers/char/svm.c:1863:8: include/linux/uaccess.h:112:17: warning: 'pmem' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'svm_remap_proc': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/char/svm.c:1849:29: note: 'pmem' declared here 1849 | struct svm_proc_mem pmem; | ^~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'svm_ioctl' at drivers/char/svm.c:2217:9: include/linux/uaccess.h:112:17: warning: 'params' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'svm_ioctl': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/char/svm.c:2209:33: note: 'params' declared here 2209 | struct svm_bind_process params; | ^~~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'svm_sp_free_mem' at drivers/char/svm.c:2179:8, inlined from 'svm_ioctl' at drivers/char/svm.c:2280:9: >> include/linux/uaccess.h:112:17: warning: 'spallocinfo' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'svm_ioctl': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/char/svm.c:2172:24: note: 'spallocinfo' declared here 2172 | struct spalloc spallocinfo; | ^~~~~~~~~~~ vim +/spallocinfo +112 include/linux/uaccess.h d597580d373774 Al Viro 2017-03-20 104 d597580d373774 Al Viro 2017-03-20 105 #ifdef INLINE_COPY_FROM_USER d597580d373774 Al Viro 2017-03-20 106 static inline unsigned long d597580d373774 Al Viro 2017-03-20 107 _copy_from_user(void *to, const void __user *from, unsigned long n) d597580d373774 Al Viro 2017-03-20 108 { d597580d373774 Al Viro 2017-03-20 109 unsigned long res = n; 9c5f6908de03a4 Al Viro 2017-06-29 110 might_fault(); 4983cb67a383a7 Linus Torvalds 2019-02-14 111 if (likely(access_ok(from, n))) { 9c5f6908de03a4 Al Viro 2017-06-29 @112 kasan_check_write(to, n); d597580d373774 Al Viro 2017-03-20 113 res = raw_copy_from_user(to, from, n); 9c5f6908de03a4 Al Viro 2017-06-29 114 } d597580d373774 Al Viro 2017-03-20 115 if (unlikely(res)) d597580d373774 Al Viro 2017-03-20 116 memset(to + (n - res), 0, res); d597580d373774 Al Viro 2017-03-20 117 return res; d597580d373774 Al Viro 2017-03-20 118 } d597580d373774 Al Viro 2017-03-20 119 #else d597580d373774 Al Viro 2017-03-20 120 extern unsigned long d597580d373774 Al Viro 2017-03-20 121 _copy_from_user(void *, const void __user *, unsigned long); d597580d373774 Al Viro 2017-03-20 122 #endif d597580d373774 Al Viro 2017-03-20 123 :::::: The code at line 112 was first introduced by commit :::::: 9c5f6908de03a4f52ba7364b11fcd6116225480c copy_{from,to}_user(): move kasan checks and might_fault() out-of-line :::::: TO: Al Viro <viro(a)zeniv.linux.org.uk> :::::: CC: Al Viro <viro(a)zeniv.linux.org.uk> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS] BUILD REGRESSION 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4
by kernel test robot 21 Dec '24

21 Dec '24

tree/branch: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS branch HEAD: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 !14240 sunrpc: fix one UAF issue caused by sunrpc kernel tcp socket Error/Warning (recently discovered and may have been fixed): https://lore.kernel.org/oe-kbuild-all/202412201455.A4yCBFrP-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202412201754.UDg3QqQf-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202412201919.863TCPHL-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202412201921.TZ1izhG7-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202412210041.OxTX5o7L-lkp@intel.com include/linux/uaccess.h:112:17: warning: 'bind' may be used uninitialized [-Wmaybe-uninitialized] include/linux/uaccess.h:112:17: warning: 'gup' may be used uninitialized [-Wmaybe-uninitialized] include/linux/uaccess.h:115:17: warning: 'acc' may be used uninitialized [-Wmaybe-uninitialized] mm/share_pool.c:1043:9: error: implicit declaration of function 'sysctl_compaction_handler'; did you mean 'sysctl_memcg_qos_handler'? [-Werror=implicit-function-declaration] mm/share_pool.c:2121:12: warning: 'proc_stat_show' defined but not used [-Wunused-function] mm/share_pool.c:3736:12: warning: 'proc_overview_show' defined but not used [-Wunused-function] Unverified Error/Warning (likely false positive, kindly check if interested): drivers/bluetooth/hci_h5.o: warning: objtool: missing symbol for section .exit.text drivers/dca/dca-sysfs.o: warning: objtool: missing symbol for section .exit.text drivers/pci/controller/vmd.o: warning: objtool: missing symbol for section .init.text drivers/platform/mellanox/.tmp_mlxreg-io.o: warning: objtool: missing symbol for section .init.text drivers/power/supply/.tmp_adp5061.o: warning: objtool: missing symbol for section .init.text fs/autofs/init.o: warning: objtool: missing symbol for section .init.text fs/sysfs/.tmp_dir.o: warning: objtool: missing symbol for section .text fs/sysfs/.tmp_symlink.o: warning: objtool: missing symbol for section .text include/linux/uaccess.h:112:17: warning: 'ibuf' may be used uninitialized [-Wmaybe-uninitialized] kernel/bpf/.tmp_stackmap.o: warning: objtool: bpf_get_stackid()+0x130: can't find switch jump table net/8021q/vlan_netlink.o: warning: objtool: missing symbol for section .exit.text net/bluetooth/bnep/sock.o: warning: objtool: missing symbol for section .exit.text net/bluetooth/hidp/sock.o: warning: objtool: missing symbol for section .exit.text net/bluetooth/rfcomm/sock.o: warning: objtool: missing symbol for section .exit.text net/hsr/hsr_netlink.o: warning: objtool: missing symbol for section .exit.text net/rfkill/input.o: warning: objtool: missing symbol for section .exit.text net/x25/x25_proc.o: warning: objtool: missing symbol for section .exit.text Error/Warning ids grouped by kconfigs: recent_errors |-- arm64-allnoconfig | |-- kernel-sched-core.c:error:implicit-declaration-of-function-init_auto_affinity | |-- kernel-sched-core.c:error:implicit-declaration-of-function-tg_update_affinity_domains | |-- mm-memory.c:error:implicit-declaration-of-function-hugetlb_insert_hugepage_pte_by_pa | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled |-- arm64-randconfig-001-20241220 | |-- drivers-clocksource-arm_arch_timer.c:error:hisi_161010101_read_cntvct_el0-undeclared-(first-use-in-this-function) | |-- kernel-sched-core.c:error:implicit-declaration-of-function-init_auto_affinity | |-- kernel-sched-core.c:error:implicit-declaration-of-function-tg_update_affinity_domains | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled |-- arm64-randconfig-002-20241220 | |-- drivers-iommu-arm-smmu-v3.c:error:CONFIG_CMA_ALIGNMENT-undeclared-(first-use-in-this-function) | |-- include-linux-kernel.h:error:first-argument-to-__builtin_choose_expr-not-a-constant | |-- include-linux-uaccess.h:warning:acc-may-be-used-uninitialized | |-- include-linux-uaccess.h:warning:bind-may-be-used-uninitialized | |-- include-linux-uaccess.h:warning:gup-may-be-used-uninitialized | |-- include-linux-uaccess.h:warning:ibuf-may-be-used-uninitialized | |-- include-linux-uaccess.h:warning:ioeventfd-may-be-used-uninitialized | |-- include-linux-uaccess.h:warning:newinfo-may-be-used-uninitialized | |-- include-linux-uaccess.h:warning:sve-may-be-used-uninitialized | |-- include-linux-uaccess.h:warning:unmap-may-be-used-uninitialized | `-- sound-soc-soc-generic-dmaengine-pcm.c:warning:strncpy-accessing-bytes-at-offsets-and-may-overlap-up-to-bytes-at-offset |-- arm64-randconfig-003-20241220 | |-- drivers-iommu-arm-smmu-v3.c:error:CONFIG_CMA_ALIGNMENT-undeclared-(first-use-in-this-function) | |-- drivers-misc-uacce-uacce.c:error:implicit-declaration-of-function-module_refcount | |-- include-linux-kernel.h:error:first-argument-to-__builtin_choose_expr-not-a-constant | |-- mm-share_pool.c:error:implicit-declaration-of-function-sysctl_compaction_handler | |-- mm-share_pool.c:warning:proc_overview_show-defined-but-not-used | |-- mm-share_pool.c:warning:proc_stat_show-defined-but-not-used | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled |-- arm64-randconfig-004-20241220 | |-- arch-arm64-kernel-cpufeature.c:error:a32_elf_hwcap2-undeclared-(first-use-in-this-function) | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled |-- x86_64-alldefconfig | |-- arch-x86-include-asm-msr.h:warning:mcu_ctrl-may-be-used-uninitialized | |-- arch-x86-kernel-cpu-mce-amd.o:warning:objtool:missing-symbol-for-section-.irqentry.text | |-- arch-x86-kernel-cpu-mce-therm_throt.o:warning:objtool:missing-symbol-for-section-.irqentry.text | |-- arch-x86-kernel-cpu-mce-threshold.o:warning:objtool:missing-symbol-for-section-.irqentry.text | `-- mm-memory.c:error:implicit-declaration-of-function-hugetlb_insert_hugepage_pte_by_pa |-- x86_64-allnoconfig | |-- mm-memory.c:error:implicit-declaration-of-function-hugetlb_insert_hugepage_pte_by_pa-Werror-Wimplicit-function-declaration | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled-Werror-Wimplicit-function-declaration |-- x86_64-allyesconfig | |-- drivers-net-ethernet-hisilicon-hns3-hns3_extension-hns3_enet_it.c:warning:no-previous-prototype-for-function-hns3_nic_select_queue_it | `-- samples-vfio-mdev-.tmp_mdpy-fb.o:warning:objtool:missing-symbol-for-section-.init.text |-- x86_64-buildonly-randconfig-001-20241219 | |-- drivers-platform-mellanox-.tmp_mlxreg-io.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-power-supply-.tmp_adp5061.o:warning:objtool:missing-symbol-for-section-.init.text | |-- fs-sysfs-.tmp_dir.o:warning:objtool:missing-symbol-for-section-.text | |-- fs-sysfs-.tmp_symlink.o:warning:objtool:missing-symbol-for-section-.text | `-- kernel-time-.tmp_posix-stubs.o:warning:objtool:sys_ni_posix_timerscold():unreachable-instruction |-- x86_64-buildonly-randconfig-001-20241220 | |-- arch-x86-power-cpu.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- drivers-bluetooth-hci_h5.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- drivers-dax-bus.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- drivers-dca-dca-sysfs.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- drivers-mtd-mtdchar.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- drivers-nvme-target-configfs.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- drivers-tty-serial-sc16is7xx.c:warning:label-err_i2c-defined-but-not-used | |-- mm-memory.c:error:implicit-declaration-of-function-hugetlb_insert_hugepage_pte_by_pa | |-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled | |-- net-8021q-vlan_netlink.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- net-bluetooth-bnep-sock.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- net-bluetooth-hidp-sock.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- net-bluetooth-rfcomm-sock.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- net-hsr-hsr_netlink.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- net-rfkill-input.o:warning:objtool:missing-symbol-for-section-.exit.text | `-- net-x25-x25_proc.o:warning:objtool:missing-symbol-for-section-.exit.text |-- x86_64-buildonly-randconfig-002-20241220 | |-- arch-x86-kernel-cpu-mce-.tmp_therm_throt.o:warning:objtool:missing-symbol-for-section-.irqentry.text | |-- arch-x86-kernel-cpu-mce-.tmp_threshold.o:warning:objtool:missing-symbol-for-section-.irqentry.text | |-- drivers-fpga-.tmp_dfl-afu-main.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-fpga-.tmp_dfl-fme-br.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-fpga-.tmp_dfl-fme-main.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-fpga-.tmp_dfl-fme-mgr.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-fpga-.tmp_dfl.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-media-radio-si47-.tmp_radio-si47-i2c.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-mux-.tmp_adgs1408.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-power-supply-.tmp_adp5061.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-usb-common-.tmp_usb-otg-fsm.o:warning:objtool:otg_set_state:can-t-find-switch-jump-table | |-- fs-autofs-.tmp_expire.o:warning:objtool:missing-symbol-for-section-.text | |-- kernel-bpf-.tmp_stackmap.o:warning:objtool:bpf_get_stackid:can-t-find-switch-jump-table | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled-Werror-Wimplicit-function-declaration |-- x86_64-buildonly-randconfig-003-20241220 | |-- arch-x86-include-asm-msr.h:warning:mcu_ctrl-may-be-used-uninitialized | |-- drivers-base-.tmp_driver.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-.tmp_drm_fourcc.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-amd-amdgpu-..-powerplay-smumgr-.tmp_smu9_smumgr.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-dispnv50-.tmp_base917c.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-dispnv50-.tmp_core827d.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-dispnv50-.tmp_core907d.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-dispnv50-.tmp_core917d.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-dispnv50-.tmp_ovly917e.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-ce-.tmp_gv100.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-disp-.tmp_baseg84.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-disp-.tmp_basegf119.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-disp-.tmp_changv100.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-disp-.tmp_coreg84.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-disp-.tmp_coreg94.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-disp-.tmp_coregk104.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-disp-.tmp_ovlyg84.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-disp-.tmp_ovlygf119.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-disp-.tmp_ovlygk104.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-disp-.tmp_ovlygt200.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-dma-.tmp_gv100.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-gr-.tmp_ctxgk110.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-gr-.tmp_gp104.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-engine-gr-.tmp_gp10b.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-subdev-fb-.tmp_gp100.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-subdev-ltc-.tmp_gp100.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-subdev-ltc-.tmp_gp102.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-subdev-mmu-.tmp_gv100.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-nouveau-nvkm-subdev-mmu-.tmp_vmmgv100.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-hwtracing-intel_th-.tmp_msu-sink.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-mtd-nand-.tmp_core.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-mtd-nand-spi-.tmp_core.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-pci-controller-dwc-.tmp_pcie-designware.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-pci-controller-hisi-pcie-customer-.tmp_hisi_pcie_cae.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-power-supply-.tmp_adp5061.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-powercap-.tmp_intel_rapl_common.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-powercap-.tmp_intel_rapl_msr.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-regulator-.tmp_qcom-rpmh-regulator.o:warning:objtool:missing-symbol-for-section-.init.text | |-- fs-autofs-.tmp_expire.o:warning:objtool:missing-symbol-for-section-.text | |-- fs-crypto-.tmp_fname.o:warning:objtool:missing-symbol-for-section-.text | |-- kernel-trace-.tmp_trace_events_trigger.o:warning:objtool:missing-symbol-for-section-.init.text | |-- lib-.tmp_idr.o:warning:objtool:missing-symbol-for-section-.text | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled |-- x86_64-buildonly-randconfig-004-20241220 | |-- arch-x86-include-asm-msr.h:warning:mcu_ctrl-may-be-used-uninitialized | |-- drivers-dax-bus.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- drivers-mtd-mtdchar.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- drivers-power-supply-ds2760_battery.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- mm-memory.c:error:implicit-declaration-of-function-hugetlb_insert_hugepage_pte_by_pa | `-- mm-vmscan.c:error:implicit-declaration-of-function-kernel_swap_enabled |-- x86_64-buildonly-randconfig-005-20241220 | |-- arch-x86-mm-.tmp_maccess.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-gpu-drm-panel-.tmp_panel-ilitek-ili9881c.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-mfd-.tmp_madera-i2c.o:warning:objtool:missing-symbol-for-section-.init.text | |-- kernel-rcu-.tmp_rcutorture.o:warning:objtool:missing-symbol-for-section-.init.text | |-- mm-memory.c:error:implicit-declaration-of-function-hugetlb_insert_hugepage_pte_by_pa-Werror-Wimplicit-function-declaration | |-- net-sched-.tmp_sch_skbprio.o:warning:objtool:missing-symbol-for-section-.init.text | |-- sound-soc-codecs-.tmp_mt6351.o:warning:objtool:missing-symbol-for-section-.init.text | |-- sound-soc-codecs-.tmp_ssm2305.o:warning:objtool:missing-symbol-for-section-.init.text | `-- sound-soc-codecs-.tmp_wm8782.o:warning:objtool:missing-symbol-for-section-.init.text |-- x86_64-buildonly-randconfig-006-20241220 | |-- arch-x86-include-asm-msr.h:warning:mcu_ctrl-may-be-used-uninitialized | |-- arch-x86-power-cpu.o:warning:objtool:missing-symbol-for-section-.exit.text | |-- block-bfq-wf2q.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-input-touchscreen-bu21029_ts.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-leds-leds-lm3601x.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-media-dvb-frontends-mn88443x.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-media-platform-vicodec-vicodec-codec.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-mtd-nand-core.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-mtd-nand-spi-core.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-net-phy-mdio-mscc-miim.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-nfc-st-nci-i2c.c:warning:of_st_nci_i2c_match-defined-but-not-used | |-- drivers-pci-ats.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-pci-controller-dwc-pcie-designware.o:warning:objtool:missing-symbol-for-section-.text | |-- drivers-pci-controller-vmd.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-power-supply-adp5061.o:warning:objtool:missing-symbol-for-section-.init.text | |-- drivers-power-supply-ds2760_battery.o:warning:objtool:missing-symbol-for-section-.init.text | |-- fs-autofs-init.o:warning:objtool:missing-symbol-for-section-.init.text | |-- fs-hpfs-buffer.o:warning:objtool:missing-symbol-for-section-.text | |-- fs-udf-unicode.o:warning:objtool:missing-symbol-for-section-.text | `-- mm-memory.c:error:implicit-declaration-of-function-hugetlb_insert_hugepage_pte_by_pa |-- x86_64-defconfig | |-- kernel-sched-pelt.o:warning:objtool:missing-symbol-for-section-.text | |-- net-ipv4-metrics.o:warning:objtool:missing-symbol-for-section-.text | `-- net-ipv4-netlink.o:warning:objtool:missing-symbol-for-section-.text `-- x86_64-randconfig-102-20241218 `-- fs-ext4-inode.o:warning:objtool:ext4_map_blocks:unreachable-instruction elapsed time: 795m configs tested: 16 configs skipped: 116 tested configs: arm64 allmodconfig gcc-14.2.0 arm64 allnoconfig gcc-14.2.0 arm64 randconfig-001-20241220 gcc-14.2.0 arm64 randconfig-002-20241220 gcc-14.2.0 arm64 randconfig-003-20241220 gcc-14.2.0 arm64 randconfig-004-20241220 gcc-14.2.0 x86_64 alldefconfig gcc-12 x86_64 allnoconfig clang-19 x86_64 allyesconfig clang-19 x86_64 buildonly-randconfig-001-20241220 gcc-12 x86_64 buildonly-randconfig-002-20241220 clang-19 x86_64 buildonly-randconfig-003-20241220 gcc-12 x86_64 buildonly-randconfig-004-20241220 gcc-12 x86_64 buildonly-randconfig-005-20241220 clang-19 x86_64 buildonly-randconfig-006-20241220 gcc-12 x86_64 defconfig gcc-11 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

1 0

[openeuler:openEuler-1.0-LTS 1341/1341] include/linux/uaccess.h:112:17: warning: 'bind' may be used uninitialized
by kernel test robot 21 Dec '24

21 Dec '24

Hi Jean-Philippe, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 commit: 2dd8345826607c5d2d6528de872118da554015b6 [1341/1341] vfio: Add support for Shared Virtual Addressing config: arm64-randconfig-002-20241220 (https://download.01.org/0day-ci/archive/20241221/202412210041.OxTX5o7L-lkp@…) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241221/202412210041.OxTX5o7L-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412210041.OxTX5o7L-lkp@intel.com/ Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): In file included from include/linux/compat.h:19, from drivers/vfio/vfio_iommu_type1.c:27: In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'vfio_iommu_type1_bind_process' at drivers/vfio/vfio_iommu_type1.c:1933:6: include/linux/uaccess.h:112:17: warning: 'params' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/compiler.h:251, from include/asm-generic/div64.h:25, from ./arch/arm64/include/generated/asm/div64.h:1, from include/linux/math64.h:6, from include/linux/time64.h:5, from include/linux/compat_time.h:6, from include/linux/compat.h:10: include/linux/kasan-checks.h: In function 'vfio_iommu_type1_bind_process': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/vfio/vfio_iommu_type1.c:1920:46: note: 'params' declared here 1920 | struct vfio_iommu_type1_bind_process params; | ^~~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'vfio_iommu_type1_unbind_process' at drivers/vfio/vfio_iommu_type1.c:2021:6: include/linux/uaccess.h:112:17: warning: 'params' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'vfio_iommu_type1_unbind_process': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/vfio/vfio_iommu_type1.c:2014:46: note: 'params' declared here 2014 | struct vfio_iommu_type1_bind_process params; | ^~~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'vfio_iommu_type1_ioctl.part.0' at drivers/vfio/vfio_iommu_type1.c:2084:7: include/linux/uaccess.h:112:17: warning: 'info' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'vfio_iommu_type1_ioctl.part.0': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/vfio/vfio_iommu_type1.c:2080:46: note: 'info' declared here 2080 | struct vfio_iommu_type1_info info; | ^~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'vfio_iommu_type1_ioctl.part.0' at drivers/vfio/vfio_iommu_type1.c:2104:7: include/linux/uaccess.h:112:17: warning: 'map' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'vfio_iommu_type1_ioctl.part.0': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/vfio/vfio_iommu_type1.c:2098:49: note: 'map' declared here 2098 | struct vfio_iommu_type1_dma_map map; | ^~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'vfio_iommu_type1_ioctl.part.0' at drivers/vfio/vfio_iommu_type1.c:2118:7: include/linux/uaccess.h:112:17: warning: 'unmap' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'vfio_iommu_type1_ioctl.part.0': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/vfio/vfio_iommu_type1.c:2113:51: note: 'unmap' declared here 2113 | struct vfio_iommu_type1_dma_unmap unmap; | ^~~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'vfio_iommu_type1_ioctl.part.0' at drivers/vfio/vfio_iommu_type1.c:2136:7: >> include/linux/uaccess.h:112:17: warning: 'bind' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'vfio_iommu_type1_ioctl.part.0': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/vfio/vfio_iommu_type1.c:2132:46: note: 'bind' declared here 2132 | struct vfio_iommu_type1_bind bind; | ^~~~ In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'vfio_iommu_type1_ioctl.part.0' at drivers/vfio/vfio_iommu_type1.c:2155:7: >> include/linux/uaccess.h:112:17: warning: 'bind' may be used uninitialized [-Wmaybe-uninitialized] 112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kasan-checks.h: In function 'vfio_iommu_type1_ioctl.part.0': include/linux/kasan-checks.h:7:6: note: by argument 1 of type 'const volatile void *' to 'kasan_check_write' declared here 7 | void kasan_check_write(const volatile void *p, unsigned int size); | ^~~~~~~~~~~~~~~~~ drivers/vfio/vfio_iommu_type1.c:2151:46: note: 'bind' declared here 2151 | struct vfio_iommu_type1_bind bind; | ^~~~ vim +/bind +112 include/linux/uaccess.h d597580d373774 Al Viro 2017-03-20 104 d597580d373774 Al Viro 2017-03-20 105 #ifdef INLINE_COPY_FROM_USER d597580d373774 Al Viro 2017-03-20 106 static inline unsigned long d597580d373774 Al Viro 2017-03-20 107 _copy_from_user(void *to, const void __user *from, unsigned long n) d597580d373774 Al Viro 2017-03-20 108 { d597580d373774 Al Viro 2017-03-20 109 unsigned long res = n; 9c5f6908de03a4 Al Viro 2017-06-29 110 might_fault(); 4983cb67a383a7 Linus Torvalds 2019-02-14 111 if (likely(access_ok(from, n))) { 9c5f6908de03a4 Al Viro 2017-06-29 @112 kasan_check_write(to, n); d597580d373774 Al Viro 2017-03-20 113 res = raw_copy_from_user(to, from, n); 9c5f6908de03a4 Al Viro 2017-06-29 114 } d597580d373774 Al Viro 2017-03-20 115 if (unlikely(res)) d597580d373774 Al Viro 2017-03-20 116 memset(to + (n - res), 0, res); d597580d373774 Al Viro 2017-03-20 117 return res; d597580d373774 Al Viro 2017-03-20 118 } d597580d373774 Al Viro 2017-03-20 119 #else d597580d373774 Al Viro 2017-03-20 120 extern unsigned long d597580d373774 Al Viro 2017-03-20 121 _copy_from_user(void *, const void __user *, unsigned long); d597580d373774 Al Viro 2017-03-20 122 #endif d597580d373774 Al Viro 2017-03-20 123 :::::: The code at line 112 was first introduced by commit :::::: 9c5f6908de03a4f52ba7364b11fcd6116225480c copy_{from,to}_user(): move kasan checks and might_fault() out-of-line :::::: TO: Al Viro <viro(a)zeniv.linux.org.uk> :::::: CC: Al Viro <viro(a)zeniv.linux.org.uk> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-5.10 2594/2594] fs/f2fs/file.o: warning: objtool: fill_zero()+0x583: unreachable instruction
by kernel test robot 20 Dec '24

20 Dec '24

tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: e804413fbbd504bc7b5b84dc7b86307f2b127a83 commit: fe0aed0230fbd8246fb028d126548fa69b4f9bf4 [2594/2594] mm: hugetlb: free the 2nd vmemmap page associated with each HugeTLB page config: x86_64-buildonly-randconfig-006-20241219 (https://download.01.org/0day-ci/archive/20241220/202412202335.VSfnWHmY-lkp@…) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241220/202412202335.VSfnWHmY-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412202335.VSfnWHmY-lkp@intel.com/ All warnings (new ones prefixed by >>): >> fs/f2fs/file.o: warning: objtool: fill_zero()+0x583: unreachable instruction -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS 1334/1334] fs/ext4/inode.o: warning: objtool: ext4_map_blocks()+0x9ea: unreachable instruction
by kernel test robot 20 Dec '24

20 Dec '24

Hi Jan, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 commit: 5d5f0e49572a1948fa42fd082aaa8238757614bd [1334/1334] ext4: Check journal inode extents more carefully config: x86_64-randconfig-102-20241218 (https://download.01.org/0day-ci/archive/20241220/202412202311.0ETgmhXR-lkp@…) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241220/202412202311.0ETgmhXR-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412202311.0ETgmhXR-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from fs/ext4/inode.c:25: include/linux/pagemap.h:425:21: warning: cast from 'int (*)(struct file *, struct page *)' to 'filler_t *' (aka 'int (*)(void *, struct page *)') converts to incompatible function type [-Wcast-function-type-strict] 425 | filler_t *filler = (filler_t *)mapping->a_ops->readpage; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. >> fs/ext4/inode.o: warning: objtool: ext4_map_blocks()+0x9ea: unreachable instruction -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS 1336/1336] kernel/time/.tmp_posix-stubs.o: warning: objtool: sys_ni_posix_timers.cold()+0x0: unreachable instruction
by kernel test robot 20 Dec '24

20 Dec '24

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 commit: 56bc1719652e7a937bc9856f76f0c0fbf8ce1b23 [1336/1336] objtool: Support GCC 9 cold subfunction naming scheme config: x86_64-buildonly-randconfig-001-20241219 (https://download.01.org/0day-ci/archive/20241220/202412201921.TZ1izhG7-lkp@…) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241220/202412201921.TZ1izhG7-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412201921.TZ1izhG7-lkp@intel.com/ All warnings (new ones prefixed by >>): kernel/time/posix-stubs.c:27:17: warning: no previous prototype for 'sys_ni_posix_timers' [-Wmissing-prototypes] 27 | asmlinkage long sys_ni_posix_timers(void) | ^~~~~~~~~~~~~~~~~~~ kernel/time/posix-stubs.c:74:5: warning: no previous prototype for 'do_clock_gettime' [-Wmissing-prototypes] 74 | int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp) | ^~~~~~~~~~~~~~~~ >> kernel/time/.tmp_posix-stubs.o: warning: objtool: sys_ni_posix_timers.cold()+0x0: unreachable instruction -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS 1341/1341] mm/share_pool.c:3736:12: warning: 'proc_overview_show' defined but not used
by kernel test robot 20 Dec '24

20 Dec '24

Hi Tang, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 commit: 1cfc25ccec44c17c19c892bd31d00d8f6fb23f9b [1341/1341] share_pool: Add proc node to show process overview info config: arm64-randconfig-003-20241220 (https://download.01.org/0day-ci/archive/20241220/202412201919.863TCPHL-lkp@…) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241220/202412201919.863TCPHL-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412201919.863TCPHL-lkp@intel.com/ All warnings (new ones prefixed by >>): mm/share_pool.c: In function 'sp_group_id_by_pid': mm/share_pool.c:840:29: warning: ordered comparison of pointer with integer zero [-Wextra] 840 | if (!spg_ids || num <= 0) | ^~ mm/share_pool.c: In function 'sp_compact_nodes': mm/share_pool.c:1689:9: error: implicit declaration of function 'sysctl_compaction_handler'; did you mean 'sysctl_memcg_qos_handler'? [-Werror=implicit-function-declaration] 1689 | sysctl_compaction_handler(NULL, 1, NULL, NULL, NULL); | ^~~~~~~~~~~~~~~~~~~~~~~~~ | sysctl_memcg_qos_handler mm/share_pool.c: At top level: >> mm/share_pool.c:3736:12: warning: 'proc_overview_show' defined but not used [-Wunused-function] 3736 | static int proc_overview_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~~~~~~ mm/share_pool.c:3693:12: warning: 'proc_stat_show' defined but not used [-Wunused-function] 3693 | static int proc_stat_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~~ mm/share_pool.c:3635:12: warning: 'spa_stat_show' defined but not used [-Wunused-function] 3635 | static int spa_stat_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/proc_overview_show +3736 mm/share_pool.c 3735 > 3736 static int proc_overview_show(struct seq_file *seq, void *offset) 3737 { 3738 seq_printf(seq, "%-8s %-16s %-9s %-9s %-9s %-10s %-10s %-8s\n", 3739 "PID", "COMM", "SP_ALLOC", "SP_K2U", "SP_RES", "Non-SP_RES", 3740 "Non-SP_Shm", "VIRT"); 3741 3742 down_read(&sp_proc_stat_sem); 3743 idr_for_each(&sp_proc_stat_idr, idr_proc_overview_cb, seq); 3744 up_read(&sp_proc_stat_sem); 3745 return 0; 3746 } 3747 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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