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[openeuler:openEuler-1.0-LTS 1555/1555] kernel/trace/trace_output.o: warning: objtool: missing symbol for section .init.text
by kernel test robot 02 Apr '25

02 Apr '25

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 7951fd324625a8af5097e1476cdc8c33c6009b48 commit: 31bf327231bb582ec7dca0490cc90c364b36e095 [1555/1555] tracing: Make sure trace_printk() can output as soon as it can be used config: x86_64-buildonly-randconfig-001-20250402 (https://download.01.org/0day-ci/archive/20250402/202504021912.9ieuHMMu-lkp@…) compiler: clang version 20.1.1 (https://github.com/llvm/llvm-project 424c2d9b7e4de40d0804dd374721e6411c27d1d1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250402/202504021912.9ieuHMMu-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/202504021912.9ieuHMMu-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/trace/trace_output.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:OLK-6.6 2077/2077] kernel/module/strict_rwx.c:36:6: warning: no previous prototype for 'module_disable_ro'
by kernel test robot 02 Apr '25

02 Apr '25

Hi Zheng, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 75db7d4fff188725f4adc2de1281daa5b8680603 commit: c8783f92771c891518257c9deb22cd91d4e1a212 [2077/2077] livepatch/core: Revert module_enable_ro and module_disable_ro config: x86_64-randconfig-161-20250402 (https://download.01.org/0day-ci/archive/20250402/202504021840.VgjrPfcw-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/20250402/202504021840.VgjrPfcw-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/202504021840.VgjrPfcw-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/module/strict_rwx.c:36:6: warning: no previous prototype for 'module_disable_ro' [-Wmissing-prototypes] 36 | void module_disable_ro(const struct module *mod) | ^~~~~~~~~~~~~~~~~ vim +/module_disable_ro +36 kernel/module/strict_rwx.c 34 35 #ifdef CONFIG_LIVEPATCH_WO_FTRACE > 36 void module_disable_ro(const struct module *mod) 37 { 38 if (!IS_ENABLED(CONFIG_STRICT_MODULE_RWX)) 39 return; 40 #ifdef CONFIG_STRICT_MODULE_RWX 41 if (!rodata_enabled) 42 return; 43 #endif 44 45 module_set_memory(mod, MOD_TEXT, set_memory_rw); 46 module_set_memory(mod, MOD_INIT_TEXT, set_memory_rw); 47 module_set_memory(mod, MOD_RODATA, set_memory_rw); 48 module_set_memory(mod, MOD_INIT_RODATA, set_memory_rw); 49 } 50 #endif /* CONFIG_LIVEPATCH_WO_FTRACE */ 51 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

1 0

[openeuler:openEuler-1.0-LTS 1546/1546] include/linux/uaccess.h:115:17: warning: 'stats' may be used uninitialized
by kernel test robot 02 Apr '25

02 Apr '25

Hi Guillaume, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 7951fd324625a8af5097e1476cdc8c33c6009b48 commit: 528534f0deda05c668756313a22974429a9df05a [1546/1546] l2tp: remove pppol2tp_tunnel_ioctl() config: arm64-randconfig-002-20250401 (https://download.01.org/0day-ci/archive/20250402/202504021807.twewxnJE-lkp@…) compiler: aarch64-linux-gcc (GCC) 12.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250402/202504021807.twewxnJE-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/202504021807.twewxnJE-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 >>): net/l2tp/l2tp_ppp.c: In function 'pppol2tp_ioctl': net/l2tp/l2tp_ppp.c:1122:13: warning: variable 'val' set but not used [-Wunused-but-set-variable] 1122 | int val; | ^~~ In file included from net/l2tp/l2tp_ppp.c:62: net/l2tp/l2tp_ppp.c: At top level: include/linux/module.h:132:13: warning: 'init_module' specifies less restrictive attribute than its target 'pppol2tp_init': 'cold' [-Wmissing-attributes] 132 | int init_module(void) __attribute__((alias(#initfn))); | ^~~~~~~~~~~ net/l2tp/l2tp_ppp.c:1802:1: note: in expansion of macro 'module_init' 1802 | module_init(pppol2tp_init); | ^~~~~~~~~~~ net/l2tp/l2tp_ppp.c:1754:19: note: 'init_module' target declared here 1754 | static int __init pppol2tp_init(void) | ^~~~~~~~~~~~~ include/linux/module.h:138:14: warning: 'cleanup_module' specifies less restrictive attribute than its target 'pppol2tp_exit': 'cold' [-Wmissing-attributes] 138 | void cleanup_module(void) __attribute__((alias(#exitfn))); | ^~~~~~~~~~~~~~ net/l2tp/l2tp_ppp.c:1803:1: note: in expansion of macro 'module_exit' 1803 | module_exit(pppol2tp_exit); | ^~~~~~~~~~~ net/l2tp/l2tp_ppp.c:1792:20: note: 'cleanup_module' target declared here 1792 | static void __exit pppol2tp_exit(void) | ^~~~~~~~~~~~~ In file included from net/l2tp/l2tp_ppp.c:65: In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:147:7, inlined from 'pppol2tp_ioctl' at net/l2tp/l2tp_ppp.c:1163:8: >> include/linux/uaccess.h:115:17: warning: 'stats' may be used uninitialized [-Wmaybe-uninitialized] 115 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/compiler.h:246, from include/linux/kernel.h:10, from include/linux/list.h:9, from include/linux/module.h:9: include/linux/kasan-checks.h: In function 'pppol2tp_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); | ^~~~~~~~~~~~~~~~~ net/l2tp/l2tp_ppp.c:1120:35: note: 'stats' declared here 1120 | struct pppol2tp_ioc_stats stats; | ^~~~~ vim +/stats +115 include/linux/uaccess.h d597580d373774 Al Viro 2017-03-20 107 d597580d373774 Al Viro 2017-03-20 108 #ifdef INLINE_COPY_FROM_USER d597580d373774 Al Viro 2017-03-20 109 static inline unsigned long d597580d373774 Al Viro 2017-03-20 110 _copy_from_user(void *to, const void __user *from, unsigned long n) d597580d373774 Al Viro 2017-03-20 111 { d597580d373774 Al Viro 2017-03-20 112 unsigned long res = n; 9c5f6908de03a4 Al Viro 2017-06-29 113 might_fault(); 9c5f6908de03a4 Al Viro 2017-06-29 114 if (likely(access_ok(VERIFY_READ, from, n))) { 9c5f6908de03a4 Al Viro 2017-06-29 @115 kasan_check_write(to, n); d597580d373774 Al Viro 2017-03-20 116 res = raw_copy_from_user(to, from, n); 9c5f6908de03a4 Al Viro 2017-06-29 117 } d597580d373774 Al Viro 2017-03-20 118 if (unlikely(res)) d597580d373774 Al Viro 2017-03-20 119 memset(to + (n - res), 0, res); d597580d373774 Al Viro 2017-03-20 120 return res; d597580d373774 Al Viro 2017-03-20 121 } d597580d373774 Al Viro 2017-03-20 122 #else d597580d373774 Al Viro 2017-03-20 123 extern unsigned long d597580d373774 Al Viro 2017-03-20 124 _copy_from_user(void *, const void __user *, unsigned long); d597580d373774 Al Viro 2017-03-20 125 #endif d597580d373774 Al Viro 2017-03-20 126 :::::: The code at line 115 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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[PATCH OLK-5.10] gpio: aggregator: protect driver attr handlers against module unload
by Chen Zhongjin 02 Apr '25

02 Apr '25

From: Koichiro Den <koichiro.den(a)canonical.com> stable inclusion from stable-v5.10.235 commit fd6aa1f8cbe0979eb66ac32ebc231bf0b10a2117 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IBY441 CVE: CVE-2025-21943 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 12f65d1203507f7db3ba59930fe29a3b8eee9945 upstream. Both new_device_store and delete_device_store touch module global resources (e.g. gpio_aggregator_lock). To prevent race conditions with module unload, a reference needs to be held. Add try_module_get() in these handlers. For new_device_store, this eliminates what appears to be the most dangerous scenario: if an id is allocated from gpio_aggregator_idr but platform_device_register has not yet been called or completed, a concurrent module unload could fail to unregister/delete the device, leaving behind a dangling platform device/GPIO forwarder. This can result in various issues. The following simple reproducer demonstrates these problems: #!/bin/bash while :; do # note: whether 'gpiochip0 0' exists or not does not matter. echo 'gpiochip0 0' > /sys/bus/platform/drivers/gpio-aggregator/new_device done & while :; do modprobe gpio-aggregator modprobe -r gpio-aggregator done & wait Starting with the following warning, several kinds of warnings will appear and the system may become unstable: ------------[ cut here ]------------ list_del corruption, ffff888103e2e980->next is LIST_POISON1 (dead000000000100) WARNING: CPU: 1 PID: 1327 at lib/list_debug.c:56 __list_del_entry_valid_or_report+0xa3/0x120 [...] RIP: 0010:__list_del_entry_valid_or_report+0xa3/0x120 [...] Call Trace: <TASK> ? __list_del_entry_valid_or_report+0xa3/0x120 ? __warn.cold+0x93/0xf2 ? __list_del_entry_valid_or_report+0xa3/0x120 ? report_bug+0xe6/0x170 ? __irq_work_queue_local+0x39/0xe0 ? handle_bug+0x58/0x90 ? exc_invalid_op+0x13/0x60 ? asm_exc_invalid_op+0x16/0x20 ? __list_del_entry_valid_or_report+0xa3/0x120 gpiod_remove_lookup_table+0x22/0x60 new_device_store+0x315/0x350 [gpio_aggregator] kernfs_fop_write_iter+0x137/0x1f0 vfs_write+0x262/0x430 ksys_write+0x60/0xd0 do_syscall_64+0x6c/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e [...] </TASK> ---[ end trace 0000000000000000 ]--- Fixes: 828546e24280 ("gpio: Add GPIO Aggregator") Cc: stable(a)vger.kernel.org Signed-off-by: Koichiro Den <koichiro.den(a)canonical.com> Link: https://lore.kernel.org/r/20250224143134.3024598-2-koichiro.den@canonical.c… Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski(a)linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Wang Hai <wanghai38(a)huawei.com> Signed-off-by: Chen Zhongjin <chenzhongjin(a)huawei.com> --- drivers/gpio/gpio-aggregator.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c index d5f25246404d..4017f132656a 100644 --- a/drivers/gpio/gpio-aggregator.c +++ b/drivers/gpio/gpio-aggregator.c @@ -173,10 +173,15 @@ static ssize_t new_device_store(struct device_driver *driver, const char *buf, struct platform_device *pdev; int res, id; + if (!try_module_get(THIS_MODULE)) + return -ENOENT; + /* kernfs guarantees string termination, so count + 1 is safe */ aggr = kzalloc(sizeof(*aggr) + count + 1, GFP_KERNEL); - if (!aggr) - return -ENOMEM; + if (!aggr) { + res = -ENOMEM; + goto put_module; + } memcpy(aggr->args, buf, count + 1); @@ -215,6 +220,7 @@ static ssize_t new_device_store(struct device_driver *driver, const char *buf, } aggr->pdev = pdev; + module_put(THIS_MODULE); return count; remove_table: @@ -229,6 +235,8 @@ static ssize_t new_device_store(struct device_driver *driver, const char *buf, kfree(aggr->lookups); free_ga: kfree(aggr); +put_module: + module_put(THIS_MODULE); return res; } @@ -257,13 +265,19 @@ static ssize_t delete_device_store(struct device_driver *driver, if (error) return error; + if (!try_module_get(THIS_MODULE)) + return -ENOENT; + mutex_lock(&gpio_aggregator_lock); aggr = idr_remove(&gpio_aggregator_idr, id); mutex_unlock(&gpio_aggregator_lock); - if (!aggr) + if (!aggr) { + module_put(THIS_MODULE); return -ENOENT; + } gpio_aggregator_free(aggr); + module_put(THIS_MODULE); return count; } static DRIVER_ATTR_WO(delete_device); -- 2.25.1

2 1

[PATCH OLK-6.6] gpio: aggregator: protect driver attr handlers against module unload
by Chen Zhongjin 02 Apr '25

02 Apr '25

From: Koichiro Den <koichiro.den(a)canonical.com> stable inclusion from stable-v6.6.83 commit d99dc8f7ea01ee1b21306e0eda8eb18a4af80db6 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IBY441 CVE: CVE-2025-21943 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 12f65d1203507f7db3ba59930fe29a3b8eee9945 upstream. Both new_device_store and delete_device_store touch module global resources (e.g. gpio_aggregator_lock). To prevent race conditions with module unload, a reference needs to be held. Add try_module_get() in these handlers. For new_device_store, this eliminates what appears to be the most dangerous scenario: if an id is allocated from gpio_aggregator_idr but platform_device_register has not yet been called or completed, a concurrent module unload could fail to unregister/delete the device, leaving behind a dangling platform device/GPIO forwarder. This can result in various issues. The following simple reproducer demonstrates these problems: #!/bin/bash while :; do # note: whether 'gpiochip0 0' exists or not does not matter. echo 'gpiochip0 0' > /sys/bus/platform/drivers/gpio-aggregator/new_device done & while :; do modprobe gpio-aggregator modprobe -r gpio-aggregator done & wait Starting with the following warning, several kinds of warnings will appear and the system may become unstable: ------------[ cut here ]------------ list_del corruption, ffff888103e2e980->next is LIST_POISON1 (dead000000000100) WARNING: CPU: 1 PID: 1327 at lib/list_debug.c:56 __list_del_entry_valid_or_report+0xa3/0x120 [...] RIP: 0010:__list_del_entry_valid_or_report+0xa3/0x120 [...] Call Trace: <TASK> ? __list_del_entry_valid_or_report+0xa3/0x120 ? __warn.cold+0x93/0xf2 ? __list_del_entry_valid_or_report+0xa3/0x120 ? report_bug+0xe6/0x170 ? __irq_work_queue_local+0x39/0xe0 ? handle_bug+0x58/0x90 ? exc_invalid_op+0x13/0x60 ? asm_exc_invalid_op+0x16/0x20 ? __list_del_entry_valid_or_report+0xa3/0x120 gpiod_remove_lookup_table+0x22/0x60 new_device_store+0x315/0x350 [gpio_aggregator] kernfs_fop_write_iter+0x137/0x1f0 vfs_write+0x262/0x430 ksys_write+0x60/0xd0 do_syscall_64+0x6c/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e [...] </TASK> ---[ end trace 0000000000000000 ]--- Fixes: 828546e24280 ("gpio: Add GPIO Aggregator") Cc: stable(a)vger.kernel.org Signed-off-by: Koichiro Den <koichiro.den(a)canonical.com> Link: https://lore.kernel.org/r/20250224143134.3024598-2-koichiro.den@canonical.c… Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski(a)linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: ZhangPeng <zhangpeng362(a)huawei.com> Signed-off-by: Chen Zhongjin <chenzhongjin(a)huawei.com> --- drivers/gpio/gpio-aggregator.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c index 38e0fff9afe7..cc6ee4334602 100644 --- a/drivers/gpio/gpio-aggregator.c +++ b/drivers/gpio/gpio-aggregator.c @@ -121,10 +121,15 @@ static ssize_t new_device_store(struct device_driver *driver, const char *buf, struct platform_device *pdev; int res, id; + if (!try_module_get(THIS_MODULE)) + return -ENOENT; + /* kernfs guarantees string termination, so count + 1 is safe */ aggr = kzalloc(sizeof(*aggr) + count + 1, GFP_KERNEL); - if (!aggr) - return -ENOMEM; + if (!aggr) { + res = -ENOMEM; + goto put_module; + } memcpy(aggr->args, buf, count + 1); @@ -163,6 +168,7 @@ static ssize_t new_device_store(struct device_driver *driver, const char *buf, } aggr->pdev = pdev; + module_put(THIS_MODULE); return count; remove_table: @@ -177,6 +183,8 @@ static ssize_t new_device_store(struct device_driver *driver, const char *buf, kfree(aggr->lookups); free_ga: kfree(aggr); +put_module: + module_put(THIS_MODULE); return res; } @@ -205,13 +213,19 @@ static ssize_t delete_device_store(struct device_driver *driver, if (error) return error; + if (!try_module_get(THIS_MODULE)) + return -ENOENT; + mutex_lock(&gpio_aggregator_lock); aggr = idr_remove(&gpio_aggregator_idr, id); mutex_unlock(&gpio_aggregator_lock); - if (!aggr) + if (!aggr) { + module_put(THIS_MODULE); return -ENOENT; + } gpio_aggregator_free(aggr); + module_put(THIS_MODULE); return count; } static DRIVER_ATTR_WO(delete_device); -- 2.25.1

2 1

[PATCH OLK-5.10] [Backport] gpio: aggregator: protect driver attr handlers against module unload
by Chen Zhongjin 02 Apr '25

02 Apr '25

From: Koichiro Den <koichiro.den(a)canonical.com> stable inclusion from stable-v5.10.235 commit fd6aa1f8cbe0979eb66ac32ebc231bf0b10a2117 category: bugfix bugzilla: 189268 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 12f65d1203507f7db3ba59930fe29a3b8eee9945 upstream. Both new_device_store and delete_device_store touch module global resources (e.g. gpio_aggregator_lock). To prevent race conditions with module unload, a reference needs to be held. Add try_module_get() in these handlers. For new_device_store, this eliminates what appears to be the most dangerous scenario: if an id is allocated from gpio_aggregator_idr but platform_device_register has not yet been called or completed, a concurrent module unload could fail to unregister/delete the device, leaving behind a dangling platform device/GPIO forwarder. This can result in various issues. The following simple reproducer demonstrates these problems: #!/bin/bash while :; do # note: whether 'gpiochip0 0' exists or not does not matter. echo 'gpiochip0 0' > /sys/bus/platform/drivers/gpio-aggregator/new_device done & while :; do modprobe gpio-aggregator modprobe -r gpio-aggregator done & wait Starting with the following warning, several kinds of warnings will appear and the system may become unstable: ------------[ cut here ]------------ list_del corruption, ffff888103e2e980->next is LIST_POISON1 (dead000000000100) WARNING: CPU: 1 PID: 1327 at lib/list_debug.c:56 __list_del_entry_valid_or_report+0xa3/0x120 [...] RIP: 0010:__list_del_entry_valid_or_report+0xa3/0x120 [...] Call Trace: <TASK> ? __list_del_entry_valid_or_report+0xa3/0x120 ? __warn.cold+0x93/0xf2 ? __list_del_entry_valid_or_report+0xa3/0x120 ? report_bug+0xe6/0x170 ? __irq_work_queue_local+0x39/0xe0 ? handle_bug+0x58/0x90 ? exc_invalid_op+0x13/0x60 ? asm_exc_invalid_op+0x16/0x20 ? __list_del_entry_valid_or_report+0xa3/0x120 gpiod_remove_lookup_table+0x22/0x60 new_device_store+0x315/0x350 [gpio_aggregator] kernfs_fop_write_iter+0x137/0x1f0 vfs_write+0x262/0x430 ksys_write+0x60/0xd0 do_syscall_64+0x6c/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e [...] </TASK> ---[ end trace 0000000000000000 ]--- Fixes: 828546e24280 ("gpio: Add GPIO Aggregator") Cc: stable(a)vger.kernel.org Signed-off-by: Koichiro Den <koichiro.den(a)canonical.com> Link: https://lore.kernel.org/r/20250224143134.3024598-2-koichiro.den@canonical.c… Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski(a)linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Wang Hai <wanghai38(a)huawei.com> Signed-off-by: Chen Zhongjin <chenzhongjin(a)huawei.com> --- drivers/gpio/gpio-aggregator.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c index d5f25246404d..4017f132656a 100644 --- a/drivers/gpio/gpio-aggregator.c +++ b/drivers/gpio/gpio-aggregator.c @@ -173,10 +173,15 @@ static ssize_t new_device_store(struct device_driver *driver, const char *buf, struct platform_device *pdev; int res, id; + if (!try_module_get(THIS_MODULE)) + return -ENOENT; + /* kernfs guarantees string termination, so count + 1 is safe */ aggr = kzalloc(sizeof(*aggr) + count + 1, GFP_KERNEL); - if (!aggr) - return -ENOMEM; + if (!aggr) { + res = -ENOMEM; + goto put_module; + } memcpy(aggr->args, buf, count + 1); @@ -215,6 +220,7 @@ static ssize_t new_device_store(struct device_driver *driver, const char *buf, } aggr->pdev = pdev; + module_put(THIS_MODULE); return count; remove_table: @@ -229,6 +235,8 @@ static ssize_t new_device_store(struct device_driver *driver, const char *buf, kfree(aggr->lookups); free_ga: kfree(aggr); +put_module: + module_put(THIS_MODULE); return res; } @@ -257,13 +265,19 @@ static ssize_t delete_device_store(struct device_driver *driver, if (error) return error; + if (!try_module_get(THIS_MODULE)) + return -ENOENT; + mutex_lock(&gpio_aggregator_lock); aggr = idr_remove(&gpio_aggregator_idr, id); mutex_unlock(&gpio_aggregator_lock); - if (!aggr) + if (!aggr) { + module_put(THIS_MODULE); return -ENOENT; + } gpio_aggregator_free(aggr); + module_put(THIS_MODULE); return count; } static DRIVER_ATTR_WO(delete_device); -- 2.25.1

2 1

[PATCH OLK-5.10] bpf, sockmap: Fix race between element replace and close()
by Liu Jian 02 Apr '25

02 Apr '25

From: Michal Luczaj <mhal(a)rbox.co> mainline inclusion from mainline-v6.13-rc3 commit ed1fc5d76b81a4d681211333c026202cad4d5649 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEAMZ CVE: CVE-2024-56664 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… ------------------------------------------------- Element replace (with a socket different from the one stored) may race with socket's close() link popping & unlinking. __sock_map_delete() unconditionally unrefs the (wrong) element: // set map[0] = s0 map_update_elem(map, 0, s0) // drop fd of s0 close(s0) sock_map_close() lock_sock(sk) (s0!) sock_map_remove_links(sk) link = sk_psock_link_pop() sock_map_unlink(sk, link) sock_map_delete_from_link // replace map[0] with s1 map_update_elem(map, 0, s1) sock_map_update_elem (s1!) lock_sock(sk) sock_map_update_common psock = sk_psock(sk) spin_lock(&stab->lock) osk = stab->sks[idx] sock_map_add_link(..., &stab->sks[idx]) sock_map_unref(osk, &stab->sks[idx]) psock = sk_psock(osk) sk_psock_put(sk, psock) if (refcount_dec_and_test(&psock)) sk_psock_drop(sk, psock) spin_unlock(&stab->lock) unlock_sock(sk) __sock_map_delete spin_lock(&stab->lock) sk = *psk // s1 replaced s0; sk == s1 if (!sk_test || sk_test == sk) // sk_test (s0) != sk (s1); no branch sk = xchg(psk, NULL) if (sk) sock_map_unref(sk, psk) // unref s1; sks[idx] will dangle psock = sk_psock(sk) sk_psock_put(sk, psock) if (refcount_dec_and_test()) sk_psock_drop(sk, psock) spin_unlock(&stab->lock) release_sock(sk) Then close(map) enqueues bpf_map_free_deferred, which finally calls sock_map_free(). This results in some refcount_t warnings along with a KASAN splat [1]. Fix __sock_map_delete(), do not allow sock_map_unref() on elements that may have been replaced. [1]: BUG: KASAN: slab-use-after-free in sock_map_free+0x10e/0x330 Write of size 4 at addr ffff88811f5b9100 by task kworker/u64:12/1063 CPU: 14 UID: 0 PID: 1063 Comm: kworker/u64:12 Not tainted 6.12.0+ #125 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 Workqueue: events_unbound bpf_map_free_deferred Call Trace: <TASK> dump_stack_lvl+0x68/0x90 print_report+0x174/0x4f6 kasan_report+0xb9/0x190 kasan_check_range+0x10f/0x1e0 sock_map_free+0x10e/0x330 bpf_map_free_deferred+0x173/0x320 process_one_work+0x846/0x1420 worker_thread+0x5b3/0xf80 kthread+0x29e/0x360 ret_from_fork+0x2d/0x70 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 1202: kasan_save_stack+0x1e/0x40 kasan_save_track+0x10/0x30 __kasan_slab_alloc+0x85/0x90 kmem_cache_alloc_noprof+0x131/0x450 sk_prot_alloc+0x5b/0x220 sk_alloc+0x2c/0x870 unix_create1+0x88/0x8a0 unix_create+0xc5/0x180 __sock_create+0x241/0x650 __sys_socketpair+0x1ce/0x420 __x64_sys_socketpair+0x92/0x100 do_syscall_64+0x93/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e Freed by task 46: kasan_save_stack+0x1e/0x40 kasan_save_track+0x10/0x30 kasan_save_free_info+0x37/0x60 __kasan_slab_free+0x4b/0x70 kmem_cache_free+0x1a1/0x590 __sk_destruct+0x388/0x5a0 sk_psock_destroy+0x73e/0xa50 process_one_work+0x846/0x1420 worker_thread+0x5b3/0xf80 kthread+0x29e/0x360 ret_from_fork+0x2d/0x70 ret_from_fork_asm+0x1a/0x30 The buggy address belongs to the object at ffff88811f5b9080 which belongs to the cache UNIX-STREAM of size 1984 The buggy address is located 128 bytes inside of freed 1984-byte region [ffff88811f5b9080, ffff88811f5b9840) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11f5b8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888127d49401 flags: 0x17ffffc0000040(head|node=0|zone=2|lastcpupid=0x1fffff) page_type: f5(slab) raw: 0017ffffc0000040 ffff8881042e4500 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800f000f 00000001f5000000 ffff888127d49401 head: 0017ffffc0000040 ffff8881042e4500 dead000000000122 0000000000000000 head: 0000000000000000 00000000800f000f 00000001f5000000 ffff888127d49401 head: 0017ffffc0000003 ffffea00047d6e01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88811f5b9000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88811f5b9080: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88811f5b9180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88811f5b9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb Disabling lock debugging due to kernel taint refcount_t: addition on 0; use-after-free. WARNING: CPU: 14 PID: 1063 at lib/refcount.c:25 refcount_warn_saturate+0xce/0x150 CPU: 14 UID: 0 PID: 1063 Comm: kworker/u64:12 Tainted: G B 6.12.0+ #125 Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 Workqueue: events_unbound bpf_map_free_deferred RIP: 0010:refcount_warn_saturate+0xce/0x150 Code: 34 73 eb 03 01 e8 82 53 ad fe 0f 0b eb b1 80 3d 27 73 eb 03 00 75 a8 48 c7 c7 80 bd 95 84 c6 05 17 73 eb 03 01 e8 62 53 ad fe <0f> 0b eb 91 80 3d 06 73 eb 03 00 75 88 48 c7 c7 e0 bd 95 84 c6 05 RSP: 0018:ffff88815c49fc70 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff88811f5b9100 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: 0000000000000002 R08: 0000000000000001 R09: ffffed10bcde6349 R10: ffff8885e6f31a4b R11: 0000000000000000 R12: ffff88813be0b000 R13: ffff88811f5b9100 R14: ffff88811f5b9080 R15: ffff88813be0b024 FS: 0000000000000000(0000) GS:ffff8885e6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055dda99b0250 CR3: 000000015dbac000 CR4: 0000000000752ef0 PKRU: 55555554 Call Trace: <TASK> ? __warn.cold+0x5f/0x1ff ? refcount_warn_saturate+0xce/0x150 ? report_bug+0x1ec/0x390 ? handle_bug+0x58/0x90 ? exc_invalid_op+0x13/0x40 ? asm_exc_invalid_op+0x16/0x20 ? refcount_warn_saturate+0xce/0x150 sock_map_free+0x2e5/0x330 bpf_map_free_deferred+0x173/0x320 process_one_work+0x846/0x1420 worker_thread+0x5b3/0xf80 kthread+0x29e/0x360 ret_from_fork+0x2d/0x70 ret_from_fork_asm+0x1a/0x30 </TASK> irq event stamp: 10741 hardirqs last enabled at (10741): [<ffffffff84400ec6>] asm_sysvec_apic_timer_interrupt+0x16/0x20 hardirqs last disabled at (10740): [<ffffffff811e532d>] handle_softirqs+0x60d/0x770 softirqs last enabled at (10506): [<ffffffff811e55a9>] __irq_exit_rcu+0x109/0x210 softirqs last disabled at (10301): [<ffffffff811e55a9>] __irq_exit_rcu+0x109/0x210 refcount_t: underflow; use-after-free. WARNING: CPU: 14 PID: 1063 at lib/refcount.c:28 refcount_warn_saturate+0xee/0x150 CPU: 14 UID: 0 PID: 1063 Comm: kworker/u64:12 Tainted: G B W 6.12.0+ #125 Tainted: [B]=BAD_PAGE, [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 Workqueue: events_unbound bpf_map_free_deferred RIP: 0010:refcount_warn_saturate+0xee/0x150 Code: 17 73 eb 03 01 e8 62 53 ad fe 0f 0b eb 91 80 3d 06 73 eb 03 00 75 88 48 c7 c7 e0 bd 95 84 c6 05 f6 72 eb 03 01 e8 42 53 ad fe <0f> 0b e9 6e ff ff ff 80 3d e6 72 eb 03 00 0f 85 61 ff ff ff 48 c7 RSP: 0018:ffff88815c49fc70 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff88811f5b9100 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: 0000000000000003 R08: 0000000000000001 R09: ffffed10bcde6349 R10: ffff8885e6f31a4b R11: 0000000000000000 R12: ffff88813be0b000 R13: ffff88811f5b9100 R14: ffff88811f5b9080 R15: ffff88813be0b024 FS: 0000000000000000(0000) GS:ffff8885e6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055dda99b0250 CR3: 000000015dbac000 CR4: 0000000000752ef0 PKRU: 55555554 Call Trace: <TASK> ? __warn.cold+0x5f/0x1ff ? refcount_warn_saturate+0xee/0x150 ? report_bug+0x1ec/0x390 ? handle_bug+0x58/0x90 ? exc_invalid_op+0x13/0x40 ? asm_exc_invalid_op+0x16/0x20 ? refcount_warn_saturate+0xee/0x150 sock_map_free+0x2d3/0x330 bpf_map_free_deferred+0x173/0x320 process_one_work+0x846/0x1420 worker_thread+0x5b3/0xf80 kthread+0x29e/0x360 ret_from_fork+0x2d/0x70 ret_from_fork_asm+0x1a/0x30 </TASK> irq event stamp: 10741 hardirqs last enabled at (10741): [<ffffffff84400ec6>] asm_sysvec_apic_timer_interrupt+0x16/0x20 hardirqs last disabled at (10740): [<ffffffff811e532d>] handle_softirqs+0x60d/0x770 softirqs last enabled at (10506): [<ffffffff811e55a9>] __irq_exit_rcu+0x109/0x210 softirqs last disabled at (10301): [<ffffffff811e55a9>] __irq_exit_rcu+0x109/0x210 Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface") Signed-off-by: Michal Luczaj <mhal(a)rbox.co> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Reviewed-by: John Fastabend <john.fastabend(a)gmail.com> Link: https://lore.kernel.org/bpf/20241202-sockmap-replace-v1-3-1e88579e7bd5@rbox… Conflicts: net/core/sock_map.c [Did not backport 35d2b7ffffc1d.] Signed-off-by: Liu Jian <liujian56(a)huawei.com> --- net/core/sock_map.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/net/core/sock_map.c b/net/core/sock_map.c index c3c7f4469c80..beb8768a9285 100644 --- a/net/core/sock_map.c +++ b/net/core/sock_map.c @@ -431,12 +431,11 @@ static void *sock_map_lookup_sys(struct bpf_map *map, void *key) static int __sock_map_delete(struct bpf_stab *stab, struct sock *sk_test, struct sock **psk) { - struct sock *sk; + struct sock *sk = NULL; int err = 0; raw_spin_lock_bh(&stab->lock); - sk = *psk; - if (!sk_test || sk_test == sk) + if (!sk_test || sk_test == *psk) sk = xchg(psk, NULL); if (likely(sk)) -- 2.34.1

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[PATCH OLK-5.10 0/2] CVE-2024-56642
by Liu Jian 02 Apr '25

02 Apr '25

CVE-2024-56642 Eric Dumazet (1): tipc: fix NULL deref in cleanup_bearer() Kuniyuki Iwashima (1): tipc: Fix use-after-free of kernel socket in cleanup_bearer(). net/tipc/udp_media.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) -- 2.34.1

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[PATCH OLK-6.6 0/2] CVE-2024-57857
by Liu Jian 02 Apr '25

02 Apr '25

CVE-2024-57857 Bernard Metzler (1): RDMA/siw: Remove direct link to net_device Liu Jian (1): RDMA: Export ib_device_get_netdev() drivers/infiniband/core/device.c | 4 +++ drivers/infiniband/sw/siw/siw.h | 7 +++--- drivers/infiniband/sw/siw/siw_cm.c | 27 ++++++++++++++++----- drivers/infiniband/sw/siw/siw_main.c | 14 +---------- drivers/infiniband/sw/siw/siw_verbs.c | 35 ++++++++++++++++++--------- include/rdma/ib_verbs.h | 2 ++ 6 files changed, 55 insertions(+), 34 deletions(-) -- 2.34.1

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[PATCH openEuler-1.0-LTS] dmaengine: Fix double increment of client_count in dma_chan_get()
by Xiaomeng Zhang 02 Apr '25

02 Apr '25

From: Koba Ko <koba.ko(a)canonical.com> stable inclusion from stable-v4.19.272 commit c6221afe573413fd2981e291f7df4a58283e0654 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBWVX7 CVE: CVE-2022-49753 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit f3dc1b3b4750851a94212dba249703dd0e50bb20 ] The first time dma_chan_get() is called for a channel the channel client_count is incorrectly incremented twice for public channels, first in balance_ref_count(), and again prior to returning. This results in an incorrect client count which will lead to the channel resources not being freed when they should be. A simple test of repeated module load and unload of async_tx on a Dell Power Edge R7425 also shows this resulting in a kref underflow warning. [ 124.329662] async_tx: api initialized (async) [ 129.000627] async_tx: api initialized (async) [ 130.047839] ------------[ cut here ]------------ [ 130.052472] refcount_t: underflow; use-after-free. [ 130.057279] WARNING: CPU: 3 PID: 19364 at lib/refcount.c:28 refcount_warn_saturate+0xba/0x110 [ 130.065811] Modules linked in: async_tx(-) rfkill intel_rapl_msr intel_rapl_common amd64_edac edac_mce_amd ipmi_ssif kvm_amd dcdbas kvm mgag200 drm_shmem_helper acpi_ipmi irqbypass drm_kms_helper ipmi_si syscopyarea sysfillrect rapl pcspkr ipmi_devintf sysimgblt fb_sys_fops k10temp i2c_piix4 ipmi_msghandler acpi_power_meter acpi_cpufreq vfat fat drm fuse xfs libcrc32c sd_mod t10_pi sg ahci crct10dif_pclmul libahci crc32_pclmul crc32c_intel ghash_clmulni_intel igb megaraid_sas i40e libata i2c_algo_bit ccp sp5100_tco dca dm_mirror dm_region_hash dm_log dm_mod [last unloaded: async_tx] [ 130.117361] CPU: 3 PID: 19364 Comm: modprobe Kdump: loaded Not tainted 5.14.0-185.el9.x86_64 #1 [ 130.126091] Hardware name: Dell Inc. PowerEdge R7425/02MJ3T, BIOS 1.18.0 01/17/2022 [ 130.133806] RIP: 0010:refcount_warn_saturate+0xba/0x110 [ 130.139041] Code: 01 01 e8 6d bd 55 00 0f 0b e9 72 9d 8a 00 80 3d 26 18 9c 01 00 75 85 48 c7 c7 f8 a3 03 9d c6 05 16 18 9c 01 01 e8 4a bd 55 00 <0f> 0b e9 4f 9d 8a 00 80 3d 01 18 9c 01 00 0f 85 5e ff ff ff 48 c7 [ 130.157807] RSP: 0018:ffffbf98898afe68 EFLAGS: 00010286 [ 130.163036] RAX: 0000000000000000 RBX: ffff9da06028e598 RCX: 0000000000000000 [ 130.170172] RDX: ffff9daf9de26480 RSI: ffff9daf9de198a0 RDI: ffff9daf9de198a0 [ 130.177316] RBP: ffff9da7cddf3970 R08: 0000000000000000 R09: 00000000ffff7fff [ 130.184459] R10: ffffbf98898afd00 R11: ffffffff9d9e8c28 R12: ffff9da7cddf1970 [ 130.191596] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 130.198739] FS: 00007f646435c740(0000) GS:ffff9daf9de00000(0000) knlGS:0000000000000000 [ 130.206832] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 130.212586] CR2: 00007f6463b214f0 CR3: 00000008ab98c000 CR4: 00000000003506e0 [ 130.219729] Call Trace: [ 130.222192] <TASK> [ 130.224305] dma_chan_put+0x10d/0x110 [ 130.227988] dmaengine_put+0x7a/0xa0 [ 130.231575] __do_sys_delete_module.constprop.0+0x178/0x280 [ 130.237157] ? syscall_trace_enter.constprop.0+0x145/0x1d0 [ 130.242652] do_syscall_64+0x5c/0x90 [ 130.246240] ? exc_page_fault+0x62/0x150 [ 130.250178] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 130.255243] RIP: 0033:0x7f6463a3f5ab [ 130.258830] Code: 73 01 c3 48 8b 0d 75 a8 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 45 a8 1b 00 f7 d8 64 89 01 48 [ 130.277591] RSP: 002b:00007fff22f972c8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 130.285164] RAX: ffffffffffffffda RBX: 000055b6786edd40 RCX: 00007f6463a3f5ab [ 130.292303] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055b6786edda8 [ 130.299443] RBP: 000055b6786edd40 R08: 0000000000000000 R09: 0000000000000000 [ 130.306584] R10: 00007f6463b9eac0 R11: 0000000000000206 R12: 000055b6786edda8 [ 130.313731] R13: 0000000000000000 R14: 000055b6786edda8 R15: 00007fff22f995f8 [ 130.320875] </TASK> [ 130.323081] ---[ end trace eff7156d56b5cf25 ]--- cat /sys/class/dma/dma0chan*/in_use would get the wrong result. 2 2 2 Fixes: d2f4f99db3e9 ("dmaengine: Rework dma_chan_get") Signed-off-by: Koba Ko <koba.ko(a)canonical.com> Reviewed-by: Jie Hai <haijie1(a)huawei.com> Test-by: Jie Hai <haijie1(a)huawei.com> Reviewed-by: Jerry Snitselaar <jsnitsel(a)redhat.com> Reviewed-by: Dave Jiang <dave.jiang(a)intel.com> Tested-by: Joel Savitz <jsavitz(a)redhat.com> Link: https://lore.kernel.org/r/20221201030050.978595-1-koba.ko@canonical.com Signed-off-by: Vinod Koul <vkoul(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Wang Hai <wanghai38(a)huawei.com> Signed-off-by: Xiaomeng Zhang <zhangxiaomeng13(a)huawei.com> --- drivers/dma/dmaengine.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index f1a441ab395d..450b1c4b2129 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -223,7 +223,8 @@ static int dma_chan_get(struct dma_chan *chan) /* The channel is already in use, update client count */ if (chan->client_count) { __module_get(owner); - goto out; + chan->client_count++; + return 0; } if (!try_module_get(owner)) @@ -236,11 +237,11 @@ static int dma_chan_get(struct dma_chan *chan) goto err_out; } + chan->client_count++; + if (!dma_has_cap(DMA_PRIVATE, chan->device->cap_mask)) balance_ref_count(chan); -out: - chan->client_count++; return 0; err_out: -- 2.34.1

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