bisecting cause commit starting from d434405aaab7d0ebc516b68a8fc4100922d7f5ef
building syzkaller on bfeda1b1077c9ffe6f9597cbae4b6a5d747b4695
testing commit d434405aaab7d0ebc516b68a8fc4100922d7f5ef with gcc (GCC) 10.2.1 20210217
kernel signature: d6b8d59933cb5d337918721132ba05d0dc5198dbd766732d1cd02dd804dc96cc
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
reproducer seems to be flaky
testing release v5.11
testing commit f40ddce88593482919761f74910f42f4b84c004b with gcc (GCC) 10.2.1 20210217
kernel signature: 44f58b074a2b4030a1bedf2f1cdddcbbe15c92ffea3b784ca4f9f31b88987f51
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: OK
run #5: crashed: possible deadlock in vmci_qp_broker_detach
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing release v5.10
testing commit 2c85ebc57b3e1817b6ce1a6b703928e113a90442 with gcc (GCC) 10.2.1 20210217
kernel signature: 4742733baa9bf82e241d783d026dc2511126290e27e7df12714b205c43255576
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing release v5.9
testing commit bbf5c979011a099af5dc76498918ed7df445635b with gcc (GCC) 10.2.1 20210217
kernel signature: c5db40808f8354789d304b4248372764a0a9e3bd6067aa6a6a0663ace87ac3ea
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: crashed: possible deadlock in vmci_qp_broker_detach
run #5: crashed: possible deadlock in vmci_qp_broker_detach
run #6: crashed: possible deadlock in vmci_qp_broker_detach
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: crashed: possible deadlock in vmci_qp_broker_detach
run #17: OK
run #18: OK
run #19: OK
testing release v5.8
testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.4.1 20210217
kernel signature: 5d5db905a29e886d4efedddc7c045cb6d7fa040cd3d9de48e0aa78c1d3357e75
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: crashed: possible deadlock in vmci_qp_broker_detach
run #5: crashed: possible deadlock in vmci_qp_broker_detach
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing release v5.7
testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.4.1 20210217
kernel signature: 694927f270c924473baa1645cf3e46211382cdeb91db268c2363cc6797b41fe8
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing release v5.6
testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.4.1 20210217
kernel signature: 465f1dc5ded474a9ba5e43cca9cc1f09bb05d55f63916e1ebe569728cad5a636
all runs: OK
# git bisect start 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 7111951b8d4973bda27ff663f2cf18b663d15b48
Bisecting: 7542 revisions left to test after this (roughly 13 steps)
[50a5de895dbe5df947b3a695777db5b2c313e065] Merge tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

testing commit 50a5de895dbe5df947b3a695777db5b2c313e065 with gcc (GCC) 8.4.1 20210217
kernel signature: 82fc33fcd1a72091be87adac02ee32c9d7c3c8e155e1314441ffb336b1557f41
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: OK
run #4: OK
run #5: OK
run #6: crashed: possible deadlock in vmci_qp_broker_detach
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 50a5de895dbe5df947b3a695777db5b2c313e065
Bisecting: 4204 revisions left to test after this (roughly 12 steps)
[56a451b780676bc1cdac011735fe2869fa2e9abf] Merge tag 'ntb-5.7' of git://github.com/jonmason/ntb

testing commit 56a451b780676bc1cdac011735fe2869fa2e9abf with gcc (GCC) 8.4.1 20210217
kernel signature: cf688eeee575ac03248e19a8f6e5fc7907a999f77a3a6978e1b23d4bd483c9bb
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: OK
run #5: crashed: possible deadlock in vmci_qp_broker_detach
run #6: crashed: possible deadlock in vmci_qp_broker_detach
run #7: crashed: possible deadlock in vmci_qp_broker_detach
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 56a451b780676bc1cdac011735fe2869fa2e9abf
Bisecting: 1643 revisions left to test after this (roughly 11 steps)
[49835c15a55225e9b3ff9cc9317135b334ea2d49] Merge tag 'pm-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

testing commit 49835c15a55225e9b3ff9cc9317135b334ea2d49 with gcc (GCC) 8.4.1 20210217
kernel signature: 30a0b0502f6c9ed305d53bed23ad3142c60d03e6f104a9bcde2356c4e5711ed9
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: crashed: possible deadlock in vmci_qp_broker_detach
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 49835c15a55225e9b3ff9cc9317135b334ea2d49
Bisecting: 934 revisions left to test after this (roughly 10 steps)
[063d1942247668eb0bb800aef5afbbef337344be] Merge tag 'media/v5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

testing commit 063d1942247668eb0bb800aef5afbbef337344be with gcc (GCC) 8.4.1 20210217
kernel signature: 895e6258c9d8402b2e4818920d141045897f4710ac660aaf6fddd7261fc10e55
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: crashed: possible deadlock in vmci_qp_broker_detach
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: boot failed: can't ssh into the instance
# git bisect bad 063d1942247668eb0bb800aef5afbbef337344be
Bisecting: 302 revisions left to test after this (roughly 9 steps)
[481ed297d900af0ce395f6ca8975903b76a5a59e] Merge tag 'docs-5.7' of git://git.lwn.net/linux

testing commit 481ed297d900af0ce395f6ca8975903b76a5a59e with gcc (GCC) 8.4.1 20210217
kernel signature: 716d4c7ba660832f3664cdc89b562c7197f84f2ce5192cf399c351c9209e1e5c
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 481ed297d900af0ce395f6ca8975903b76a5a59e
Bisecting: 181 revisions left to test after this (roughly 8 steps)
[1592614838cb52f4313ceff64894e2ca78591498] Merge tag 'for-5.7/drivers-2020-03-29' of git://git.kernel.dk/linux-block

testing commit 1592614838cb52f4313ceff64894e2ca78591498 with gcc (GCC) 8.4.1 20210217
kernel signature: c58496c23f9321d344b1cecd55d6b1ba7e858eb21b05c0c34f72dedd042bcc2f
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: crashed: possible deadlock in vmci_qp_broker_detach
run #5: crashed: possible deadlock in vmci_qp_broker_detach
run #6: crashed: possible deadlock in vmci_qp_broker_detach
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 1592614838cb52f4313ceff64894e2ca78591498
Bisecting: 121 revisions left to test after this (roughly 7 steps)
[766c3297d7e1584394d4af0cc8368e838124b023] null_blk: add trace in null_blk_zoned.c

testing commit 766c3297d7e1584394d4af0cc8368e838124b023 with gcc (GCC) 8.4.1 20210217
kernel signature: df7db382244812b820cff6705bf80b57376278ea60c0abc4e712b599a61ec9d9
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 766c3297d7e1584394d4af0cc8368e838124b023
Bisecting: 45 revisions left to test after this (roughly 6 steps)
[5ae3a2c03d1f5b33f53ce2ba2e57773fc8b35128] bcache: remove dupplicated declaration from btree.h

testing commit 5ae3a2c03d1f5b33f53ce2ba2e57773fc8b35128 with gcc (GCC) 8.4.1 20210217
kernel signature: 7f1dd980be93bb07d9c0285f8ab5484393e2f7d3c38f337243d368e7d3ba2ca8
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 5ae3a2c03d1f5b33f53ce2ba2e57773fc8b35128
Bisecting: 22 revisions left to test after this (roughly 5 steps)
[121e297955e312bee9edb151c9f68a550c28284b] floppy: cleanup: expand macro UDRWE

testing commit 121e297955e312bee9edb151c9f68a550c28284b with gcc (GCC) 8.4.1 20210217
kernel signature: 7f2ea00f734cc65d8b8c06ddc16a29d07e26f71512888f6fdc8af136389885f2
run #0: OK
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: crashed: possible deadlock in vmci_qp_broker_detach
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 121e297955e312bee9edb151c9f68a550c28284b
Bisecting: 10 revisions left to test after this (roughly 4 steps)
[034851049082d084a6e616900293e14590b4e0e1] block: aoe: Use scnprintf() for avoiding potential buffer overflow

testing commit 034851049082d084a6e616900293e14590b4e0e1 with gcc (GCC) 8.4.1 20210217
kernel signature: a79a005599a7d31a135ee23c2876e373cb5c6d8d1ae833e3885b8a527ba465ae
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 034851049082d084a6e616900293e14590b4e0e1
Bisecting: 5 revisions left to test after this (roughly 3 steps)
[78b10be23d42e66fc42e52b9ae620f0a6ef5b8c7] null_blk: Fix changing the number of hardware queues

testing commit 78b10be23d42e66fc42e52b9ae620f0a6ef5b8c7 with gcc (GCC) 8.4.1 20210217
kernel signature: 41dc1ad69f1cae2d1e42d42a1c5b5a106bf623e1add50c4fd2233fbb1045b626
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 78b10be23d42e66fc42e52b9ae620f0a6ef5b8c7
Bisecting: 2 revisions left to test after this (roughly 1 step)
[6e66b49392419f3fe134e1be583323ef75da1e4b] blk-mq: Keep set->nr_hw_queues and set->map[].nr_queues in sync

testing commit 6e66b49392419f3fe134e1be583323ef75da1e4b with gcc (GCC) 8.4.1 20210217
kernel signature: dbca5d2264f46a4065bcc1ef73d3836b56fa23208c10522f3f2a729c84c7021e
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: boot failed: can't ssh into the instance
# git bisect bad 6e66b49392419f3fe134e1be583323ef75da1e4b
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[2dd209f00fc5a1caafa493066c7cd692fd2fd57c] blk-mq: Fix a comment in include/linux/blk-mq.h

testing commit 2dd209f00fc5a1caafa493066c7cd692fd2fd57c with gcc (GCC) 8.4.1 20210217
kernel signature: 149c6bd418fd9c3a58ff7905e06b07b9671a3ccf3ed8a40e2f739a75bbc02ce5
run #0: crashed: possible deadlock in vmci_qp_broker_detach
run #1: crashed: possible deadlock in vmci_qp_broker_detach
run #2: crashed: possible deadlock in vmci_qp_broker_detach
run #3: crashed: possible deadlock in vmci_qp_broker_detach
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: boot failed: can't ssh into the instance
# git bisect bad 2dd209f00fc5a1caafa493066c7cd692fd2fd57c
2dd209f00fc5a1caafa493066c7cd692fd2fd57c is the first bad commit
commit 2dd209f00fc5a1caafa493066c7cd692fd2fd57c
Author: Bart Van Assche <bvanassche@acm.org>
Date:   Mon Mar 9 21:26:16 2020 -0700

    blk-mq: Fix a comment in include/linux/blk-mq.h
    
    The 'hctx_list' member of struct blk_mq_hw_ctx is not a list head but
    instead an entry in q->unused_hctx_list. Fix the comment above this
    struct member.
    
    Fixes: d386732bc142 ("blk-mq: fill header with kernel-doc")
    Signed-off-by: Bart Van Assche <bvanassche@acm.org>
    Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
    Cc: André Almeida <andrealmeid@collabora.com>
    Signed-off-by: Jens Axboe <axboe@kernel.dk>

 include/linux/blk-mq.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

parent commit 2c523b344dfa65a3738e7039832044aa133c75fb wasn't tested
testing commit 2c523b344dfa65a3738e7039832044aa133c75fb with gcc (GCC) 8.4.1 20210217
kernel signature: 149c6bd418fd9c3a58ff7905e06b07b9671a3ccf3ed8a40e2f739a75bbc02ce5
culprit signature: 149c6bd418fd9c3a58ff7905e06b07b9671a3ccf3ed8a40e2f739a75bbc02ce5
parent  signature: 149c6bd418fd9c3a58ff7905e06b07b9671a3ccf3ed8a40e2f739a75bbc02ce5
Reproducer flagged being flaky
revisions tested: 20, total time: 5h39m24.284566625s (build: 2h27m40.362746289s, test: 3h9m7.831497182s)
first bad commit: 2dd209f00fc5a1caafa493066c7cd692fd2fd57c blk-mq: Fix a comment in include/linux/blk-mq.h
recipients (to): ["axboe@kernel.dk" "bvanassche@acm.org" "chaitanya.kulkarni@wdc.com"]
recipients (cc): []
crash: possible deadlock in vmci_qp_broker_detach
============================================
WARNING: possible recursive locking detected
5.6.0-rc5-syzkaller #0 Not tainted
--------------------------------------------
syz-executor.2/13606 is trying to acquire lock:
ffffffff8b0fe8d0 (qp_broker_list.mutex){+.+.}, at: vmci_qp_broker_detach+0x122/0xe90 drivers/misc/vmw_vmci/vmci_queue_pair.c:2083

but task is already holding lock:
ffffffff8b0fe8d0 (qp_broker_list.mutex){+.+.}, at: vmci_qp_broker_detach+0x122/0xe90 drivers/misc/vmw_vmci/vmci_queue_pair.c:2083

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(qp_broker_list.mutex);
  lock(qp_broker_list.mutex);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

1 lock held by syz-executor.2/13606:
 #0: ffffffff8b0fe8d0 (qp_broker_list.mutex){+.+.}, at: vmci_qp_broker_detach+0x122/0xe90 drivers/misc/vmw_vmci/vmci_queue_pair.c:2083

stack backtrace:
CPU: 1 PID: 13606 Comm: syz-executor.2 Not tainted 5.6.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x96/0xe0 lib/dump_stack.c:118
 print_deadlock_bug kernel/locking/lockdep.c:2370 [inline]
 check_deadlock kernel/locking/lockdep.c:2411 [inline]
 validate_chain kernel/locking/lockdep.c:2954 [inline]
 __lock_acquire.cold.54+0x126/0x30e kernel/locking/lockdep.c:3954
 lock_acquire+0x12e/0x360 kernel/locking/lockdep.c:4484
 __mutex_lock_common kernel/locking/mutex.c:956 [inline]
 __mutex_lock+0x153/0x1400 kernel/locking/mutex.c:1103
 vmci_qp_broker_detach+0x122/0xe90 drivers/misc/vmw_vmci/vmci_queue_pair.c:2083
 ctx_free_ctx drivers/misc/vmw_vmci/vmci_context.c:444 [inline]
 kref_put include/linux/kref.h:65 [inline]
 vmci_ctx_put+0x4d8/0xce0 drivers/misc/vmw_vmci/vmci_context.c:497
 vmci_ctx_enqueue_datagram+0x378/0x4a0 drivers/misc/vmw_vmci/vmci_context.c:360
 dg_dispatch_as_host drivers/misc/vmw_vmci/vmci_datagram.c:275 [inline]
 vmci_datagram_dispatch drivers/misc/vmw_vmci/vmci_datagram.c:339 [inline]
 vmci_datagram_dispatch+0x279/0x920 drivers/misc/vmw_vmci/vmci_datagram.c:314
 qp_notify_peer+0x1bd/0x210 drivers/misc/vmw_vmci/vmci_queue_pair.c:1472
 vmci_qp_broker_detach+0x45a/0xe90 drivers/misc/vmw_vmci/vmci_queue_pair.c:2176
 ctx_free_ctx drivers/misc/vmw_vmci/vmci_context.c:444 [inline]
 kref_put include/linux/kref.h:65 [inline]
 vmci_ctx_put+0x4d8/0xce0 drivers/misc/vmw_vmci/vmci_context.c:497
 vmci_host_close+0xf3/0x180 drivers/misc/vmw_vmci/vmci_host.c:143
 __fput+0x256/0x790 fs/file_table.c:280
 task_work_run+0xd3/0x180 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x15d/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x4b1/0x560 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x41926b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007fff43c05d90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 000000000041926b
RDX: 0000000000570698 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2e0200a8
R10: 00007fff43c05e80 R11: 0000000000000293 R12: 000000000005f415
R13: 00000000000003e8 R14: 000000000056bf60 R15: 000000000005f3f9