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| author |   Mike Snitzer <snitzer@redhat.com> | 2020-01-27 14:07:23 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-01-27 14:52:36 -0500 |
| commit | 47ace7e012b9f7ad71d43ac9063d335ea3d6820b (patch) | |
| tree | 2b45907e46c5531c2fb824a68ad4aa5b63ce0f5c /drivers/md/dm-integrity.c | |
| parent | dm writecache: improve performance of large linear writes on SSDs (diff) | |
| download | linux-dev-47ace7e012b9f7ad71d43ac9063d335ea3d6820b.tar.xz linux-dev-47ace7e012b9f7ad71d43ac9063d335ea3d6820b.zip | |
dm: fix potential for q->make_request_fn NULL pointer
Move blk_queue_make_request() to dm.c:alloc_dev() so that
q->make_request_fn is never NULL during the lifetime of a DM device
(even one that is created without a DM table).
Otherwise generic_make_request() will crash simply by doing:
dmsetup create -n test
mount /dev/dm-N /mnt
While at it, move ->congested_data initialization out of
dm.c:alloc_dev() and into the bio-based specific init method.
Reported-by: Stefan Bader <stefan.bader@canonical.com>
BugLink: https://bugs.launchpad.net/bugs/1860231
Fixes: ff36ab34583a ("dm: remove request-based logic from make_request_fn wrapper")
Depends-on: c12c9a3c3860c ("dm: various cleanups to md->queue initialization code")
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-integrity.c')
0 files changed, 0 insertions, 0 deletions