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| author | Jeff Layton <jlayton@kernel.org> | 2020-08-04 12:31:56 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-21 13:07:29 +0200 |
| commit | 5b0051e74a1507647ec10e6b0f88648ea92eb863 (patch) | |
| tree | ef81d26e2e7536f23c26025a750e216bf7a53a88 /kernel/sysctl.c | |
| parent | 6dff911a8dbacc61cc1340a9a317fe817d310cab (diff) | |
ceph: handle zero-length feature mask in session messages
commit 02e37571f9e79022498fd0525c073b07e9d9ac69 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/sysctl.c')
0 files changed, 0 insertions, 0 deletions