linux-stable/fs/ceph
Jeff Layton 02e37571f9 ceph: handle zero-length feature mask in session messages
Most session messages contain a feature mask, but the MDS will
routinely send a REJECT message with one that is zero-length.

Commit 0fa8263367 ("ceph: fix endianness bug when handling MDS
session feature bits") fixed the decoding of the feature mask,
but failed to account for the MDS sending a zero-length feature
mask. This causes REJECT message decoding to fail.

Skip trying to decode a feature mask if the word count is zero.

Cc: stable@vger.kernel.org
URL: https://tracker.ceph.com/issues/46823
Fixes: 0fa8263367 ("ceph: fix endianness bug when handling MDS session feature bits")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Tested-by: Patrick Donnelly <pdonnell@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-08-05 17:47:07 +02:00
..
acl.c ceph: add caps perf metric for each superblock 2020-06-01 13:22:51 +02:00
addr.c ceph: move sb->wb_pagevec_pool to be a global mempool 2020-08-04 19:41:12 +02:00
cache.c ceph: replace zero-length array with flexible-array member 2020-03-30 12:42:40 +02:00
cache.h libceph, rbd, ceph: convert to use the new mount API 2019-11-27 22:28:37 +01:00
caps.c ceph: clean up and optimize ceph_check_delayed_caps() 2020-08-03 11:05:21 +02:00
ceph_frag.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debugfs.c ceph: remove redundant initialization of variable mds 2020-08-03 11:05:28 +02:00
dir.c ceph: set sec_context xattr on symlink creation 2020-08-04 19:41:11 +02:00
export.c ceph: don't return -ESTALE if there's still an open file 2020-06-01 13:22:53 +02:00
file.c ceph: do not access the kiocb after aio requests 2020-08-03 11:05:25 +02:00
inode.c ceph: add caps perf metric for each superblock 2020-06-01 13:22:51 +02:00
io.c ceph: add buffered/direct exclusionary locking for reads and writes 2019-09-16 12:06:25 +02:00
io.h ceph: add buffered/direct exclusionary locking for reads and writes 2019-09-16 12:06:25 +02:00
ioctl.c ceph: consider inode's last read/write when calculating wanted caps 2020-03-30 12:42:42 +02:00
ioctl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig libceph: replace HTTP links with HTTPS ones 2020-08-03 11:05:26 +02:00
locks.c ceph: check if file lock exists before sending unlock request 2020-03-30 12:42:40 +02:00
Makefile ceph: add dentry lease metric support 2020-06-01 13:22:51 +02:00
mds_client.c ceph: handle zero-length feature mask in session messages 2020-08-05 17:47:07 +02:00
mds_client.h ceph: periodically send perf metrics to MDSes 2020-08-03 11:05:26 +02:00
mdsmap.c ceph: remove unused variables in ceph_mdsmap_decode() 2020-08-03 11:05:27 +02:00
metric.c ceph: periodically send perf metrics to MDSes 2020-08-03 11:05:26 +02:00
metric.h ceph: send client provided metric flags in client metadata 2020-08-03 11:05:27 +02:00
quota.c ceph: allow rename operation under different quota realms 2020-06-01 13:22:53 +02:00
snap.c ceph: fix memory leak in ceph_cleanup_snapid_map() 2020-03-23 13:07:08 +01:00
strings.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
super.c ceph: move sb->wb_pagevec_pool to be a global mempool 2020-08-04 19:41:12 +02:00
super.h ceph: move sb->wb_pagevec_pool to be a global mempool 2020-08-04 19:41:12 +02:00
util.c ceph: move net/ceph/ceph_fs.c to fs/ceph/util.c 2020-01-27 16:53:40 +01:00
xattr.c ceph: remove unnecessary cast in kfree() 2020-08-03 11:05:26 +02:00