| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.3 053/193] ceph: add missing check in d_revalidate snapdir handling | Date | Mon, 11 Nov 2019 19:27:15 +0100 |
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From: Al Viro <viro@zeniv.linux.org.uk>
commit 1f08529c84cfecaf1261ed9b7e17fab18541c58f upstream.
We should not play with dcache without parent locked...
Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/ceph/inode.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1432,6 +1432,7 @@ retry_lookup: dout(" final dn %p\n", dn); } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || req->r_op == CEPH_MDS_OP_MKSNAP) && + test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { struct inode *dir = req->r_parent;
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