diff options
| author | Thorsten Blum <thorsten.blum@linux.dev> | 2025-08-06 03:10:01 +0200 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2025-09-21 19:24:50 -0400 |
| commit | ab1c282c010c4f327bd7addc3c0035fd8e3c1721 (patch) | |
| tree | cafbba7d3dfed1c92d723065eee6a4209d663b53 | |
| parent | 9ebcd022a34388bd3c37c6a11c1a9d49d5394eb2 (diff) | |
NFSD: Fix destination buffer size in nfsd4_ssc_setup_dul()
Commit 5304877936c0 ("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 72f78ae00a8e ("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: 5304877936c0 ("NFSD: Fix strncpy() fortify warning")
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index bfebe6e25638..d7c58aa64f06 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1519,7 +1519,7 @@ try_again: return 0; } if (work) { - strscpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr) - 1); + strscpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr)); refcount_set(&work->nsui_refcnt, 2); work->nsui_busy = true; list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list); |