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acct: replace all non-returning strlcpy with strscpy

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strlcpy() reads the entire source buffer first.  This read may exceed the
destination size limit.  This is both inefficient and can lead to linear
read overflows if a source string is not NUL-terminated [1].  In an effort
to remove strlcpy() completely [2], replace strlcpy() here with strscpy().
No return values were used, so direct replacement is safe.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89

Link: https://lkml.kernel.org/r/20230710011748.3538624-1-azeemshaikh38@gmail.com
Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Azeem Shaikh 2023-07-10 01:17:48 +00:00 • committed by Andrew Morton
parent b0b88e02f0
commit 4264be505d
1 changed files with 1 additions and 1 deletions
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2
kernel/acct.c
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@ -445,7 +445,7 @@ static void fill_ac(acct_t *ac)
memset(ac, 0, sizeof(acct_t));
ac->ac_version = ACCT_VERSION | ACCT_BYTEORDER;
strlcpy(ac->ac_comm, current->comm, sizeof(ac->ac_comm));
strscpy(ac->ac_comm, current->comm, sizeof(ac->ac_comm));
/* calculate run_time in nsec*/
run_time = ktime_get_ns();