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| author | Christoph Hellwig <hch@lst.de> | 2021-12-21 19:18:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 13:03:43 +0300 |
| commit | 7be5c25e31556f44bf7c4a2079184dcc93768c5d (patch) | |
| tree | e17ba5ee0fedeaf26d446b23f3635a1dacb68a64 /security | |
| parent | 6c1d0447bf0d24e92def34cb429e967bd6fed131 (diff) | |
| download | linux-7be5c25e31556f44bf7c4a2079184dcc93768c5d.tar.xz | |
block: fix error unwinding in device_add_disk
[ Upstream commit 99d8690aae4b2f0d1d90075de355ac087f820a66 ]
One device_add is called disk->ev will be freed by disk_release, so we
should free it twice. Fix this by allocating disk->ev after device_add
so that the extra local unwinding can be removed entirely.
Based on an earlier patch from Tetsuo Handa.
Reported-by: syzbot <syzbot+28a66a9fbc621c939000@syzkaller.appspotmail.com>
Tested-by: syzbot <syzbot+28a66a9fbc621c939000@syzkaller.appspotmail.com>
Fixes: 83cbce9574462c6b ("block: add error handling for device_add_disk / add_disk")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211221161851.788424-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions