linux.git/block/bdev.c, branch v5.15.185 Clone of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git block: deprecate autoloading based on dev_t 2025-03-13T11:49:51+00:00 Christoph Hellwig hch@lst.de 2022-01-04T07:16:47+00:00 6327dacfe6d6320f17c2f19dab0bbbd98f4ae05f [ Upstream commit fbdee71bb5d8d054e1bdb5af4c540f2cb86fe296 ] Make the legacy dev_t based autoloading optional and add a deprecation warning. This kind of autoloading has ceased to be useful about 20 years ago. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220104071647.164918-1-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> Stable-dep-of: 457ef47c08d2 ("block: retry call probe after request_module in blk_request_module") Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit fbdee71bb5d8d054e1bdb5af4c540f2cb86fe296 ]

Make the legacy dev_t based autoloading optional and add a deprecation
warning.  This kind of autoloading has ceased to be useful about 20 years
ago.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220104071647.164918-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: 457ef47c08d2 ("block: retry call probe after request_module in blk_request_module")
Signed-off-by: Sasha Levin <sashal@kernel.org>
block: move GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE to disk->event_flags 2023-09-19T10:23:02+00:00 Christoph Hellwig hch@lst.de 2021-11-22T13:06:13+00:00 6c06a7f6b41cbde19b08524880d854018d52d863 [ Upstream commit 1545e0b419ba1d9b9bee4061d4826340afe6b0aa ] GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE is all about the event reporting mechanism, so move it to the event_flags field. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211122130625.1136848-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> Stable-dep-of: 1a721de8489f ("block: don't add or resize partition on the disk with GENHD_FL_NO_PART") Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 1545e0b419ba1d9b9bee4061d4826340afe6b0aa ]

GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE is all about the event reporting
mechanism, so move it to the event_flags field.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211122130625.1136848-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: 1a721de8489f ("block: don't add or resize partition on the disk with GENHD_FL_NO_PART")
Signed-off-by: Sasha Levin <sashal@kernel.org>
block: simplify the block device syncing code 2022-04-27T12:38:50+00:00 Christoph Hellwig hch@lst.de 2021-10-19T06:25:30+00:00 6eb927ee189f39746bcb02123d270ef04457eab6 [ Upstream commit 1e03a36bdff4709c1bbf0f57f60ae3f776d51adf ] Get rid of the indirections and just provide a sync_bdevs helper for the generic sync code. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211019062530.2174626-8-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 1e03a36bdff4709c1bbf0f57f60ae3f776d51adf ]

Get rid of the indirections and just provide a sync_bdevs
helper for the generic sync code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211019062530.2174626-8-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
block: remove __sync_blockdev 2022-04-27T12:38:50+00:00 Christoph Hellwig hch@lst.de 2021-10-19T06:25:25+00:00 7877e7a5a52e1c9716326b94dfe6c7e6cd7bce5a [ Upstream commit 70164eb6ccb76ab679b016b4b60123bf4ec6c162 ] Instead offer a new sync_blockdev_nowait helper for the !wait case. This new helper is exported as it will grow modular callers in a bit. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211019062530.2174626-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 70164eb6ccb76ab679b016b4b60123bf4ec6c162 ]

Instead offer a new sync_blockdev_nowait helper for the !wait case.
This new helper is exported as it will grow modular callers in a bit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211019062530.2174626-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
block: genhd: fix double kfree() in __alloc_disk_node() 2021-10-02T13:29:20+00:00 Tetsuo Handa penguin-kernel@i-love.sakura.ne.jp 2021-10-02T09:23:02+00:00 06cc978d3ff226072780f74897800b33e78abb57 syzbot is reporting use-after-free read at bdev_free_inode() [1], for kfree() from __alloc_disk_node() is called before bdev_free_inode() (which is called after RCU grace period) reads bdev->bd_disk and calls kfree(bdev->bd_disk). Fix use-after-free read followed by double kfree() problem by making sure that bdev->bd_disk is NULL when calling iput(). Link: https://syzkaller.appspot.com/bug?extid=8281086e8a6fbfbd952a [1] Reported-by: syzbot <syzbot+8281086e8a6fbfbd952a@syzkaller.appspotmail.com> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/e6dd13c5-8db0-4392-6e78-a42ee5d2a1c4@i-love.sakura.ne.jp Signed-off-by: Jens Axboe <axboe@kernel.dk> 
syzbot is reporting use-after-free read at bdev_free_inode() [1], for
kfree() from __alloc_disk_node() is called before bdev_free_inode()
(which is called after RCU grace period) reads bdev->bd_disk and calls
kfree(bdev->bd_disk).

Fix use-after-free read followed by double kfree() problem
by making sure that bdev->bd_disk is NULL when calling iput().

Link: https://syzkaller.appspot.com/bug?extid=8281086e8a6fbfbd952a [1]
Reported-by: syzbot <syzbot+8281086e8a6fbfbd952a@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/e6dd13c5-8db0-4392-6e78-a42ee5d2a1c4@i-love.sakura.ne.jp
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block: move fs/block_dev.c to block/bdev.c 2021-09-07T14:39:40+00:00 Christoph Hellwig hch@lst.de 2021-09-07T14:13:03+00:00 0dca4462ed0681649fdcd5700a6ddfbaa65fa178 Move it together with the rest of the block layer. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20210907141303.1371844-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> 
Move it together with the rest of the block layer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210907141303.1371844-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>