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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-10-13 00:30:28 -0400
committerJ. Bruce Fields <bfields@redhat.com>2012-10-17 10:14:14 -0400
commitcd0b16c1c3cda12dbed1f8de8f1a9b0591990724 (patch)
tree16ef9e6b6b7ac0ee3f6113194e2732504c2f670f /fs/lockd
parentddffeb8c4d0331609ef2581d84de4d763607bd37 (diff)
downloadlinux-linaro-stable-cd0b16c1c3cda12dbed1f8de8f1a9b0591990724.tar.gz
NLM: nlm_lookup_file() may return NLMv4-specific error codes
If the filehandle is stale, or open access is denied for some reason, nlm_fopen() may return one of the NLMv4-specific error codes nlm4_stale_fh or nlm4_failed. These get passed right through nlm_lookup_file(), and so when nlmsvc_retrieve_args() calls the latter, it needs to filter the result through the cast_status() machinery. Failure to do so, will trigger the BUG_ON() in encode_nlm_stat... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Reported-by: Larry McVoy <lm@bitmover.com> Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/lockd')
-rw-r--r--fs/lockd/clntxdr.c2
-rw-r--r--fs/lockd/svcproc.c3
2 files changed, 3 insertions, 2 deletions
diff --git a/fs/lockd/clntxdr.c b/fs/lockd/clntxdr.c
index d269ada7670e..982d2676e1f8 100644
--- a/fs/lockd/clntxdr.c
+++ b/fs/lockd/clntxdr.c
@@ -223,7 +223,7 @@ static void encode_nlm_stat(struct xdr_stream *xdr,
{
__be32 *p;
- BUG_ON(be32_to_cpu(stat) > NLM_LCK_DENIED_GRACE_PERIOD);
+ WARN_ON_ONCE(be32_to_cpu(stat) > NLM_LCK_DENIED_GRACE_PERIOD);
p = xdr_reserve_space(xdr, 4);
*p = stat;
}
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index 3009a365e082..21171f0c6477 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -68,7 +68,8 @@ nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
/* Obtain file pointer. Not used by FREE_ALL call. */
if (filp != NULL) {
- if ((error = nlm_lookup_file(rqstp, &file, &lock->fh)) != 0)
+ error = cast_status(nlm_lookup_file(rqstp, &file, &lock->fh));
+ if (error != 0)
goto no_locks;
*filp = file;