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| author | Zheng Bin <zhengbin13@huawei.com> | 2020-06-18 07:21:37 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-06-18 18:24:35 +0300 |
| commit | f4bd34b139a3fa2808c4205f12714c65e1548c6c (patch) | |
| tree | f006235fc2d2c665077d6fabf8b971b81b55f1c7 /security | |
| parent | bc163c2046c5867df7d2b03e85bca29adf83fa32 (diff) | |
| download | linux-f4bd34b139a3fa2808c4205f12714c65e1548c6c.tar.xz | |
loop: replace kill_bdev with invalidate_bdev
When a filesystem is mounted on a loop device and on a loop ioctl
LOOP_SET_STATUS64, because of kill_bdev, buffer_head mappings are getting
destroyed.
kill_bdev
truncate_inode_pages
truncate_inode_pages_range
do_invalidatepage
block_invalidatepage
discard_buffer -->clear BH_Mapped flag
sb_bread
__bread_gfp
bh = __getblk_gfp
-->discard_buffer clear BH_Mapped flag
__bread_slow
submit_bh
submit_bh_wbc
BUG_ON(!buffer_mapped(bh)) --> hit this BUG_ON
Fixes: 5db470e229e2 ("loop: drop caches if offset or block_size are changed")
Signed-off-by: Zheng Bin <zhengbin13@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions