diff options
| author | Zheng Bin <zhengbin13@huawei.com> | 2020-06-18 12:21:37 +0800 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2020-06-30 15:38:02 -0400 |
| commit | 01317ebd8598f71b9c742d579cd7f4ff8e1af7ff (patch) | |
| tree | 28337c925f0fd96d44043376ffb47c475fc92a05 /drivers/block | |
| parent | 484ca169d9f97091a56980cc38649f0d2a518035 (diff) | |
loop: replace kill_bdev with invalidate_bdev
commit f4bd34b139a3fa2808c4205f12714c65e1548c6c upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/loop.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 453e3728e657..c6157ccb9498 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -1110,7 +1110,7 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info) if (lo->lo_offset != info->lo_offset || lo->lo_sizelimit != info->lo_sizelimit) { sync_blockdev(lo->lo_device); - kill_bdev(lo->lo_device); + invalidate_bdev(lo->lo_device); } /* I/O need to be drained during transfer transition */ @@ -1380,12 +1380,12 @@ static int loop_set_block_size(struct loop_device *lo, unsigned long arg) if (lo->lo_queue->limits.logical_block_size != arg) { sync_blockdev(lo->lo_device); - kill_bdev(lo->lo_device); + invalidate_bdev(lo->lo_device); } blk_mq_freeze_queue(lo->lo_queue); - /* kill_bdev should have truncated all the pages */ + /* invalidate_bdev should have truncated all the pages */ if (lo->lo_queue->limits.logical_block_size != arg && lo->lo_device->bd_inode->i_mapping->nrpages) { err = -EAGAIN; |