tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 94f199d2ce0118d64c47192cef7247cf30560eba commit: 267bce716c1008522c3b8ddbeac8d3c65514e98f [21582/21628] crypto: hisilicon/qm - drop unnecessary IS_ENABLE(CONFIG_NUMA) check config: arm64-randconfig-003-20240218 (https://download.01.org/0day-ci/archive/20240220/202402200406.0uniupLa-lkp@i...) compiler: aarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240220/202402200406.0uniupLa-lkp@i...)

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@intel.com | Closes: https://lore.kernel.org/oe-kbuild-all/202402200406.0uniupLa-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/poll.h:12, from include/linux/rtc.h:52, from include/linux/efi.h:20, from arch/arm64/include/asm/acpi.h:15, from include/acpi/acpi_io.h:7, from include/linux/acpi.h:47, from drivers/crypto/hisilicon/qm.c:4: In function '_copy_from_user', inlined from 'copy_from_user' at include/linux/uaccess.h:144:7, inlined from 'hisi_qm_uacce_ioctl' at drivers/crypto/hisilicon/qm.c:2280:7:

...

include/linux/uaccess.h:112:17: warning: 'qp_ctx' may be used uninitialized [-Wmaybe-uninitialized]

112 | kasan_check_write(to, n); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/compiler.h:265, from arch/arm64/include/asm/memory.h:24, from arch/arm64/include/asm/page.h:52, from drivers/crypto/hisilicon/qm.c:3: include/linux/kasan-checks.h: In function 'hisi_qm_uacce_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/crypto/hisilicon/qm.c:2277:28: note: 'qp_ctx' declared here 2277 | struct hisi_qp_ctx qp_ctx; | ^~~~~~ drivers/crypto/hisilicon/qm.c:3322: warning: Excess function parameter 'ce' description in 'qm_hw_error_init' drivers/crypto/hisilicon/qm.c:3322: warning: Excess function parameter 'nfe' description in 'qm_hw_error_init' drivers/crypto/hisilicon/qm.c:3322: warning: Excess function parameter 'fe' description in 'qm_hw_error_init' drivers/crypto/hisilicon/qm.c:3322: warning: Excess function parameter 'msi' description in 'qm_hw_error_init'

Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for UACCE Depends on [n]: IOMMU_API [=n] Selected by [y]: - CRYPTO_DEV_HISI_QM [=y] && CRYPTO [=y] && CRYPTO_HW [=y] && ARM64 [=y] && PCI [=y]

vim +/qp_ctx +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@zeniv.linux.org.uk :::::: CC: Al Viro viro@zeniv.linux.org.uk