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authorTony Luck <tony.luck@intel.com>2020-05-27 11:28:08 -0700
committerThomas Gleixner <tglx@linutronix.de>2020-06-11 15:19:17 +0200
commit7ccddc4613db446dc3cbb69a3763ba60ec651d13 (patch)
tree422d31f2b461c6a7b49ceef0330895dba988c107 /arch
parent17fae1294ad9d711b2c3dd0edef479d40c76a5e8 (diff)
downloadlinux-7ccddc4613db446dc3cbb69a3763ba60ec651d13.tar.bz2
x86/mce/dev-mcelog: Fix -Wstringop-truncation warning about strncpy()
The kbuild test robot reported this warning: arch/x86/kernel/cpu/mce/dev-mcelog.c: In function 'dev_mcelog_init_device': arch/x86/kernel/cpu/mce/dev-mcelog.c:346:2: warning: 'strncpy' output \ truncated before terminating nul copying 12 bytes from a string of the \ same length [-Wstringop-truncation] This is accurate, but I don't care that the trailing NUL character isn't copied. The string being copied is just a magic number signature so that crash dump tools can be sure they are decoding the right blob of memory. Use memcpy() instead of strncpy(). Fixes: d8ecca4043f2 ("x86/mce/dev-mcelog: Dynamically allocate space for machine check records") Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20200527182808.27737-1-tony.luck@intel.com
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/cpu/mce/dev-mcelog.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/mce/dev-mcelog.c b/arch/x86/kernel/cpu/mce/dev-mcelog.c
index a4fd5287f02f..43c466020ed5 100644
--- a/arch/x86/kernel/cpu/mce/dev-mcelog.c
+++ b/arch/x86/kernel/cpu/mce/dev-mcelog.c
@@ -349,7 +349,7 @@ static __init int dev_mcelog_init_device(void)
if (!mcelog)
return -ENOMEM;
- strncpy(mcelog->signature, MCE_LOG_SIGNATURE, sizeof(mcelog->signature));
+ memcpy(mcelog->signature, MCE_LOG_SIGNATURE, sizeof(mcelog->signature));
mcelog->len = mce_log_len;
mcelog->recordlen = sizeof(struct mce);