Ming Lei 2d87d455ea blk-mq: don't add non-pt request with ->end_io to batch ... dm-rq implements ->end_io callback for request issued to underlying queue, and it isn't passthrough request. Commit ab3e1d3bba ("block: allow end_io based requests in the completion batch handling") doesn't clear rq->bio and rq->__data_len for request with ->end_io in blk_mq_end_request_batch(), and this way is actually dangerous, but so far it is only for nvme passthrough request. dm-rq needs to clean up remained bios in case of partial completion, and req->bio is required, then use-after-free is triggered, so the underlying clone request can't be completed in blk_mq_end_request_batch. Fix panic by not adding such request into batch list, and the issue can be triggered simply by exposing nvme pci to dm-mpath simply. Fixes: ab3e1d3bba ("block: allow end_io based requests in the completion batch handling") Cc: dm-devel@redhat.com Cc: Mike Snitzer <snitzer@kernel.org> Reported-by: Changhui Zhong <czhong@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20221027085709.513175-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>		2022-10-27 07:15:44 -06:00
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acpi	platform-drivers-x86 for v6.1-1	2022-10-05 10:38:24 -07:00
asm-generic	powerpc updates for 6.1	2022-10-09 14:05:15 -07:00
clocksource
crypto
drm	Driver core changes for 6.1-rc1	2022-10-07 17:04:10 -07:00
dt-bindings	Here's the main clk pull request for this merge window. We have some	2022-10-08 10:06:48 -07:00
keys
kunit
kvm
linux	blk-mq: don't add non-pt request with ->end_io to batch	2022-10-27 07:15:44 -06:00
math-emu
media	USB/Thunderbolt changes for 6.1-rc1	2022-10-07 16:48:26 -07:00
memory
misc
net
pcmcia
ras
rdma
rv
scsi	SCSI misc on 20221007	2022-10-07 12:33:18 -07:00
soc	Here's the main clk pull request for this merge window. We have some	2022-10-08 10:06:48 -07:00
sound
target
trace	Char/Misc and other driver changes for 6.1-rc1	2022-10-08 08:56:37 -07:00
uapi	Char/Misc and other driver changes for 6.1-rc1	2022-10-08 08:56:37 -07:00
ufs	SCSI misc on 20221007	2022-10-07 12:33:18 -07:00
vdso
video
xen