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linux-stable/fs/ceph
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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 0fa8263367db ("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: 0fa8263367db ("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