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| author | Guannan Wang <wgnbuaa@gmail.com> | 2026-05-21 16:03:32 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-07-04 13:45:08 +0200 |
| commit | 46eb17d45be69d28c7a23ea03283b207426a8232 (patch) | |
| tree | df099f59adbdfe88684e632b56a5ab02b3a33425 | |
| parent | 83c2b7797742339bb768f83935f7ca33950db138 (diff) | |
| download | linux-stable-46eb17d45be69d28c7a23ea03283b207426a8232.tar.gz linux-stable-46eb17d45be69d28c7a23ea03283b207426a8232.zip | |
NFSD: Fix SECINFO_NO_NAME decode error cleanup
commit 9e18e83b8846a5c3fe13fc8a464b4865d33996c6 upstream.
nfsd4_decode_secinfo_no_name() currently initializes sin_exp after
decoding sin_style. If the XDR stream is truncated, the decoder returns
nfserr_bad_xdr before sin_exp is initialized.
Since commit 3fdc54646234 ("NFSD: Reduce amount of struct
nfsd4_compoundargs that needs clearing"), the inline iops array is not
cleared between RPC calls. A failed SECINFO_NO_NAME decode can therefore
leave sin_exp holding stale union contents from a previous operation.
The error response path still invokes nfsd4_secinfo_no_name_release(),
which calls exp_put() on a non-NULL sin_exp.
Initialize sin_exp before the first failable decode step, matching
nfsd4_decode_secinfo().
Fixes: 3fdc54646234 ("NFSD: Reduce amount of struct nfsd4_compoundargs that needs clearing")
Cc: stable@vger.kernel.org
Signed-off-by: Guannan Wang <wgnbuaa@gmail.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/nfsd/nfs4xdr.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 2a0946c630e1..2da83053fa10 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -2008,10 +2008,11 @@ static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u) { struct nfsd4_secinfo_no_name *sin = &u->secinfo_no_name; + + sin->sin_exp = NULL; if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0) return nfserr_bad_xdr; - sin->sin_exp = NULL; return nfs_ok; } |