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| author | Juntong Deng <juntong.deng@outlook.com> | 2023-10-30 05:10:06 +0800 |
|---|---|---|
| committer | Andreas Gruenbacher <agruenba@redhat.com> | 2023-11-06 01:51:26 +0100 |
| commit | bdcb8aa434c6d36b5c215d02a9ef07551be25a37 (patch) | |
| tree | 1154c109e3ce89a69219fc439f53ec56158f4c9e /kernel/user-return-notifier.c | |
| parent | 074d7306a4fe22fcac0b53f699f92757ab1cee99 (diff) | |
gfs2: Fix slab-use-after-free in gfs2_qd_dealloc
In gfs2_put_super(), whether withdrawn or not, the quota should
be cleaned up by gfs2_quota_cleanup().
Otherwise, struct gfs2_sbd will be freed before gfs2_qd_dealloc (rcu
callback) has run for all gfs2_quota_data objects, resulting in
use-after-free.
Also, gfs2_destroy_threads() and gfs2_quota_cleanup() is already called
by gfs2_make_fs_ro(), so in gfs2_put_super(), after calling
gfs2_make_fs_ro(), there is no need to call them again.
Reported-by: syzbot+29c47e9e51895928698c@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=29c47e9e51895928698c
Signed-off-by: Juntong Deng <juntong.deng@outlook.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'kernel/user-return-notifier.c')
0 files changed, 0 insertions, 0 deletions