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| author | Jeff Layton | 2013-03-18 15:49:07 +0100 |
|---|---|---|
| committer | J. Bruce Fields | 2013-03-18 19:58:32 +0100 |
| commit | a517b608fa3d9b65930ef53ffe4a2f9800e10f7d (patch) | |
| tree | 568ca9715795381044455f55ca1c09fca20585fd /fs/nfsd/nfscache.c | |
| parent | Linux 3.9-rc3 (diff) | |
| download | kernel-qcow2-linux-a517b608fa3d9b65930ef53ffe4a2f9800e10f7d.tar.gz kernel-qcow2-linux-a517b608fa3d9b65930ef53ffe4a2f9800e10f7d.tar.xz kernel-qcow2-linux-a517b608fa3d9b65930ef53ffe4a2f9800e10f7d.zip | |
nfsd: only unhash DRC entries that are in the hashtable
It's not safe to call hlist_del() on a newly initialized hlist_node.
That leads to a NULL pointer dereference. Only do that if the entry
is hashed.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/nfscache.c')
| -rw-r--r-- | fs/nfsd/nfscache.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 62c1ee128aeb..18509bd6f587 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -102,7 +102,8 @@ nfsd_reply_cache_free_locked(struct svc_cacherep *rp) { if (rp->c_type == RC_REPLBUFF) kfree(rp->c_replvec.iov_base); - hlist_del(&rp->c_hash); + if (!hlist_unhashed(&rp->c_hash)) + hlist_del(&rp->c_hash); list_del(&rp->c_lru); --num_drc_entries; kmem_cache_free(drc_slab, rp); |