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mm/memfd: replace deprecated strcpy() with memcpy() in alloc_name()

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strcpy() is deprecated; use memcpy() instead.

Not copying the NUL terminator is safe because strncpy_from_user() would
overwrite it anyway by appending uname to the destination buffer at index
MFD_NAME_PREFIX_LEN.

No functional changes intended.

Link: https://github.com/KSPP/linux/issues/88
Link: https://lkml.kernel.org/r/20250712174516.64243-2-thorsten.blum@linux.dev
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Thorsten Blum 2025-07-12 19:45:17 +02:00 committed by Andrew Morton
parent 5add26c0a1
commit 5bd88fef6a
1 changed files with 1 additions and 1 deletions
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2
mm/memfd.c
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@ -411,7 +411,7 @@ static char *alloc_name(const char __user *uname)
if (!name)
return ERR_PTR(-ENOMEM);
strcpy(name, MFD_NAME_PREFIX);
memcpy(name, MFD_NAME_PREFIX, MFD_NAME_PREFIX_LEN);
/* returned length does not include terminating zero */
len = strncpy_from_user(&name[MFD_NAME_PREFIX_LEN], uname, MFD_NAME_MAX_LEN + 1);
if (len < 0) {