[PATCH v2 0/2] fix bio_split_to_limits() NULL pointer dereference

[Alexander Mikhalitsyn]

BugLink: https://bugs.launchpad.net/bugs/2020901

[Impact]
System crash/hung as a consequence of null pointer dereference.

[Fix]
port appropriate patches from the upstream tree

[Test]
We have a stable reproducer on the LXD/LXC CI.

[Where problems could occur]
We've met this problem with Qemu VM (LVM storage).

Jens Axboe (2):
  block: handle bio_split_to_limits() NULL return
  pktcdvd: check for NULL returna fter calling bio_split_to_limits()

 block/blk-merge.c             | 4 +++-
 block/blk-mq.c                | 5 ++++-
 drivers/block/drbd/drbd_req.c | 2 ++
 drivers/block/pktcdvd.c       | 2 ++
 drivers/block/ps3vram.c       | 2 ++
 drivers/md/dm.c               | 2 ++
 drivers/md/md.c               | 2 ++
 drivers/nvme/host/multipath.c | 2 ++
 drivers/s390/block/dcssblk.c  | 2 ++
 9 files changed, 21 insertions(+), 2 deletions(-)

-- 
2.34.1