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author | Christoph Hellwig <hch@lst.de> | 2022-06-14 10:48:24 +0300 |
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committer | Jens Axboe <axboe@kernel.dk> | 2022-06-17 16:31:05 +0300 |
commit | 50e34d78815e474d410f342fbe783b18192ca518 (patch) | |
tree | c71b4e1bf63b621b1dba9a1e5b740b31f41d0552 /kernel | |
parent | b96f3cab59654ee2c30e6adf0b1c13cf8c0850fa (diff) | |
download | linux-50e34d78815e474d410f342fbe783b18192ca518.tar.xz |
block: disable the elevator int del_gendisk
The elevator is only used for file system requests, which are stopped in
del_gendisk. Move disabling the elevator and freeing the scheduler tags
to the end of del_gendisk instead of doing that work in disk_release and
blk_cleanup_queue to avoid a use after free on q->tag_set from
disk_release as the tag_set might not be alive at that point.
Move the blk_qos_exit call as well, as it just depends on the elevator
exit and would be the only reason to keep the not exactly cheap queue
freeze in disk_release.
Fixes: e155b0c238b2 ("blk-mq: Use shared tags for shared sbitmap support")
Reported-by: syzbot+3e3f419f4a7816471838@syzkaller.appspotmail.com
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: syzbot+3e3f419f4a7816471838@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/20220614074827.458955-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions