diff options
| author | Christoph Hellwig <hch@lst.de> | 2023-06-08 11:10:25 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-06-13 00:01:00 +0200 |
| commit | 7833b865953c8e62abc76a3261c04132b2fb69de (patch) | |
| tree | 0f6161f5cafb24f8533b990731fa82dda3da481c /certs | |
| parent | 79b8ee702c918f1936e17cc53e14bec388ce1045 (diff) | |
btrfs: fix iomap_begin length for nocow writes
can_nocow_extent can reduce the len passed in, which needs to be
propagated to btrfs_dio_iomap_begin so that iomap does not submit
more data then is mapped.
This problems exists since the btrfs_get_blocks_direct helper was added
in commit c5794e51784a ("btrfs: Factor out write portion of
btrfs_get_blocks_direct"), but the ordered_extent splitting added in
commit b73a6fd1b1ef ("btrfs: split partial dio bios before submit")
added a WARN_ON that made a syzkaller test fail.
Reported-by: syzbot+ee90502d5c8fd1d0dd93@syzkaller.appspotmail.com
Fixes: c5794e51784a ("btrfs: Factor out write portion of btrfs_get_blocks_direct")
CC: stable@vger.kernel.org # 6.1+
Tested-by: syzbot+ee90502d5c8fd1d0dd93@syzkaller.appspotmail.com
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'certs')
0 files changed, 0 insertions, 0 deletions