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| author | J. Bruce Fields <bfields@redhat.com> | 2014-10-22 14:46:29 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-14 09:00:09 -0800 |
| commit | 1cb5aec0a09d3b2f168b8c9edd411c884c33c751 (patch) | |
| tree | 56e0110afa235d54764ed68f77dac076d4993743 | |
| parent | 7134fa39fd80928b241d3f0f4a322e873834309d (diff) | |
| download | lwn-1cb5aec0a09d3b2f168b8c9edd411c884c33c751.tar.gz lwn-1cb5aec0a09d3b2f168b8c9edd411c884c33c751.zip | |
nfsd4: fix crash on unknown operation number
commit 51904b08072a8bf2b9ed74d1bd7a5300a614471d upstream.
Unknown operation numbers are caught in nfsd4_decode_compound() which
sets op->opnum to OP_ILLEGAL and op->status to nfserr_op_illegal. The
error causes the main loop in nfsd4_proc_compound() to skip most
processing. But nfsd4_proc_compound also peeks ahead at the next
operation in one case and doesn't take similar precautions there.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index f23a6ca37504..86f5d3e474bf 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1243,7 +1243,8 @@ static bool need_wrongsec_check(struct svc_rqst *rqstp) */ if (argp->opcnt == resp->opcnt) return false; - + if (next->opnum == OP_ILLEGAL) + return false; nextd = OPDESC(next); /* * Rest of 2.6.3.1.1: certain operations will return WRONGSEC |