From: kernel test robot <lkp@intel.com>
To: kernel@openeuler.org, wangyuan <wangyuan46@huawei.com>
Cc: oe-kbuild-all@lists.linux.dev
Subject: [openeuler:openEuler-1.0-LTS 1315/1315] include/linux/uaccess.h:112:17: warning: 'qp_ctx' may be used uninitialized
Date: Fri, 29 Nov 2024 01:41:39 +0800 [thread overview]
Message-ID: <202411290122.mcPBFrhU-lkp@intel.com> (raw)
Hi wangyuan,
FYI, the error/warning still remains.
tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head: b5504db0db8375a77340b5bb54c17cfb75d3c754
commit: 267bce716c1008522c3b8ddbeac8d3c65514e98f [1315/1315] crypto: hisilicon/qm - drop unnecessary IS_ENABLE(CONFIG_NUMA) check
config: arm64-randconfig-001-20241128 (https://download.01.org/0day-ci/archive/20241129/202411290122.mcPBFrhU-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241129/202411290122.mcPBFrhU-lkp@intel.com/reproduce)
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/202411290122.mcPBFrhU-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'
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
d597580d373774 Al Viro 2017-03-20 124 #ifdef INLINE_COPY_TO_USER
d597580d373774 Al Viro 2017-03-20 125 static inline unsigned long
d597580d373774 Al Viro 2017-03-20 126 _copy_to_user(void __user *to, const void *from, unsigned long n)
d597580d373774 Al Viro 2017-03-20 127 {
9c5f6908de03a4 Al Viro 2017-06-29 128 might_fault();
4983cb67a383a7 Linus Torvalds 2019-02-14 129 if (access_ok(to, n)) {
9c5f6908de03a4 Al Viro 2017-06-29 130 kasan_check_read(from, n);
d597580d373774 Al Viro 2017-03-20 131 n = raw_copy_to_user(to, from, n);
9c5f6908de03a4 Al Viro 2017-06-29 132 }
d597580d373774 Al Viro 2017-03-20 133 return n;
d597580d373774 Al Viro 2017-03-20 134 }
d597580d373774 Al Viro 2017-03-20 135 #else
d597580d373774 Al Viro 2017-03-20 136 extern unsigned long
d597580d373774 Al Viro 2017-03-20 137 _copy_to_user(void __user *, const void *, unsigned long);
d597580d373774 Al Viro 2017-03-20 138 #endif
d597580d373774 Al Viro 2017-03-20 139
d597580d373774 Al Viro 2017-03-20 140 static __always_inline unsigned long __must_check
d597580d373774 Al Viro 2017-03-20 141 copy_from_user(void *to, const void __user *from, unsigned long n)
d597580d373774 Al Viro 2017-03-20 142 {
b0377fedb65280 Al Viro 2017-06-29 143 if (likely(check_copy_size(to, n, false)))
d597580d373774 Al Viro 2017-03-20 @144 n = _copy_from_user(to, from, n);
d597580d373774 Al Viro 2017-03-20 145 return n;
d597580d373774 Al Viro 2017-03-20 146 }
d597580d373774 Al Viro 2017-03-20 147
:::::: 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>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2024-11-28 17:41 UTC|newest]
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