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| author |   Bob Peterson <rpeterso@redhat.com> | 2020-04-24 12:17:33 -0500 |
|---|---|---|
| committer |   Andreas Gruenbacher <agruenba@redhat.com> | 2020-05-08 15:15:12 +0200 |
| commit | d22f69a08dcb0f469170cda1976d5938cb0e5dcf (patch) | |
| tree | 33275d568ea935b355f4c7c59ad4bf1c7a9887f6 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | gfs2: Fix BUG during unmount after file system withdraw (diff) | |
| download | wireguard-linux-d22f69a08dcb0f469170cda1976d5938cb0e5dcf.tar.xz wireguard-linux-d22f69a08dcb0f469170cda1976d5938cb0e5dcf.zip | |
gfs2: Fix use-after-free in gfs2_logd after withdraw
When the gfs2_logd daemon withdrew, the withdraw sequence called
into make_fs_ro() to make the file system read-only. That caused the
journal descriptors to be freed. However, those journal descriptors
were used by gfs2_logd's call to gfs2_ail_flush_reqd(). This caused
a use-after free and NULL pointer dereference.
This patch changes function gfs2_logd() so that it stops all logd
work until the thread is told to stop. Once a withdraw is done,
it only does an interruptible sleep.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions