Searched hist:92986 (Results 1 - 1 of 1) sorted by relevance
| /linux-master/drivers/md/ | ||
| H A D | dm.c | diff 92b914e2 Fri Apr 15 02:45:13 MDT 2022 Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> dm: fix bio length of empty flush The commit 92986f6b4c8a ("dm: use bio_clone_fast in alloc_io/alloc_tio") removed bio_clone_fast() call from alloc_tio() when ci->io->tio is available. In this case, ci->bio is not copied to ci->io->tio.clone. This is fine since init_clone_info() sets same values to ci->bio and ci->io->tio.clone. However, when incoming bios have REQ_PREFLUSH flag, __send_empty_flush() prepares a zero length bio on stack and set it to ci->bio. At this time, ci->io->tio.clone still keeps non-zero length. When alloc_tio() chooses this ci->io->tio.clone as the bio to map, it is passed to targets as non-empty flush bio. It causes bio length check failure in dm-zoned and unexpected operation such as dm_accept_partial_bio() call. To avoid the non-empty flush bio, set zero length to ci->io->tio.clone in __send_empty_flush(). Fixes: 92986f6b4c8a ("dm: use bio_clone_fast in alloc_io/alloc_tio") Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> diff 92b914e2 Fri Apr 15 02:45:13 MDT 2022 Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> dm: fix bio length of empty flush The commit 92986f6b4c8a ("dm: use bio_clone_fast in alloc_io/alloc_tio") removed bio_clone_fast() call from alloc_tio() when ci->io->tio is available. In this case, ci->bio is not copied to ci->io->tio.clone. This is fine since init_clone_info() sets same values to ci->bio and ci->io->tio.clone. However, when incoming bios have REQ_PREFLUSH flag, __send_empty_flush() prepares a zero length bio on stack and set it to ci->bio. At this time, ci->io->tio.clone still keeps non-zero length. When alloc_tio() chooses this ci->io->tio.clone as the bio to map, it is passed to targets as non-empty flush bio. It causes bio length check failure in dm-zoned and unexpected operation such as dm_accept_partial_bio() call. To avoid the non-empty flush bio, set zero length to ci->io->tio.clone in __send_empty_flush(). Fixes: 92986f6b4c8a ("dm: use bio_clone_fast in alloc_io/alloc_tio") Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> diff 92986f6b Wed Feb 02 09:01:07 MST 2022 Christoph Hellwig <hch@lst.de> dm: use bio_clone_fast in alloc_io/alloc_tio Replace open coded bio_clone_fast implementations with the actual helper. Note that the bio allocated as part of the dm_io structure in alloc_io will only actually be used later in alloc_tio, making this earlier cloning of the information safe. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Snitzer <snitzer@redhat.com> Link: https://lore.kernel.org/r/20220202160109.108149-12-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> |
Completed in 250 milliseconds