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kernel/params.c: fix the maximum length in param_get_string 

The length parameter of strlcpy() is supposed to reflect the size of the
target buffer, not of the source string.  Harmless in this case as the
buffer is PAGE_SIZE long and the source string is always much shorter than
this, but conceptually wrong, so let's fix it.

Link: http://lkml.kernel.org/r/20170928162515.24846b4f@endymion
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jean Delvare 2017-10-03 16:16:35 -07:00 committed by Linus Torvalds
parent d09b0137d2
commit 90ceb2a3ad
1 changed files with 1 additions and 1 deletions
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kernel/params.c
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@ -507,7 +507,7 @@ EXPORT_SYMBOL(param_set_copystring);
int param_get_string(char *buffer, const struct kernel_param *kp) int param_get_string(char *buffer, const struct kernel_param *kp)
{ {
const struct kparam_string *kps = kp->str; const struct kparam_string *kps = kp->str;
return strlcpy(buffer, kps->string, kps->maxlen); return strlcpy(buffer, kps->string, PAGE_SIZE);
} }
EXPORT_SYMBOL(param_get_string); EXPORT_SYMBOL(param_get_string);