NFSD: Fix destination buffer size in nfsd4_ssc_setup_dul()

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commit ab1c282c01 upstream.

Commit 5304877936 ("NFSD: Fix strncpy() fortify warning") replaced
strncpy(,, sizeof(..)) with strlcpy(,, sizeof(..) - 1), but strlcpy()
already guaranteed NUL-termination of the destination buffer and
subtracting one byte potentially truncated the source string.

The incorrect size was then carried over in commit 72f78ae00a ("NFSD:
move from strlcpy with unused retval to strscpy") when switching from
strlcpy() to strscpy().

Fix this off-by-one error by using the full size of the destination
buffer again.

Cc: stable@vger.kernel.org
Fixes: 5304877936 ("NFSD: Fix strncpy() fortify warning")
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Thorsten Blum 2025-08-06 03:10:01 +02:00 • committed by Greg Kroah-Hartman

parent 735457683e

commit 8c5b120059

1 changed files with 1 additions and 1 deletions

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fs/nfsd/nfs4proc.c

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