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authorSage Weil <sage@newdream.net>2010-03-10 12:03:32 -0800
committerSage Weil <sage@newdream.net>2010-03-23 07:47:06 -0700
commit393f66209669ad23f4f6d4191234c1df4367df3c (patch)
tree5c628bcf731c98f5627000192e7f2d23a7a039a5 /fs/ceph/dir.c
parentd96d60498ff748c5a88c72ec5d1cc4ba9a583e7e (diff)
ceph: fix possible double-free of mds request reference
Clear pointer to mds request after dropping the reference to ensure we don't drop it again, as there is at least one error path through this function that does not reset fi->last_readdir to a new value. Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/dir.c')
-rw-r--r--fs/ceph/dir.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 5107384ee02..8a9116e15b7 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -288,8 +288,10 @@ more:
CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR;
/* discard old result, if any */
- if (fi->last_readdir)
+ if (fi->last_readdir) {
ceph_mdsc_put_request(fi->last_readdir);
+ fi->last_readdir = NULL;
+ }
/* requery frag tree, as the frag topology may have changed */
frag = ceph_choose_frag(ceph_inode(inode), frag, NULL, NULL);