ci starts bisection 2023-01-15 07:01:45.243384694 +0000 UTC m=+71230.418813962 bisecting cause commit starting from 60d86034b14eed902b3f2bea97d0c237cf2f9499 building syzkaller on 96166539c4c242fccd41c7316b7080377dca428b ensuring issue is reproducible on original commit 60d86034b14eed902b3f2bea97d0c237cf2f9499 testing commit 60d86034b14eed902b3f2bea97d0c237cf2f9499 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 2f09b8150ac2be1ba566cc8246bfb6a71550aa2120e19b1175e20451efd1a2d6 all runs: crashed: possible deadlock in br_multicast_rcv testing release v6.1 testing commit 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 3e27d137a3147da7e59b5d162c9da1c64a5fcc9225b380645c7432cb2e10cf8a all runs: crashed: possible deadlock in br_multicast_rcv testing release v6.0 testing commit 4fe89d07dcc2804c8b562f6c7896a45643d34b2f gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 14ed71713fd4d0f861edadaf83c326a6fbf9bcd92f2dd33e8848d3b5afeefc6b all runs: crashed: possible deadlock in br_multicast_rcv testing release v5.19 testing commit 3d7cb6b04c3f3115719235cc6866b10326de34cd gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 35aed5948c5aeea43f6d60f1fc6ec2530ca29ff7bdc4a54d231daca7bc69ef97 all runs: crashed: possible deadlock in br_multicast_rcv testing release v5.18 testing commit 4b0986a3613c92f4ec1bdc7f60ec66fea135991f gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: d1668b59d67bd29b304599f2789e81c0cf0a60fe9db8dc7fb1c7a82113a14ae2 all runs: crashed: possible deadlock in br_multicast_rcv testing release v5.17 testing commit f443e374ae131c168a065ea1748feac6b2e76613 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 54e35d2ac687b90e053e93bdd0ba156a4970864e4fb9f460dd015c881d9aa4de all runs: crashed: possible deadlock in br_multicast_rcv testing release v5.16 testing commit df0cc57e057f18e44dac8e6c18aba47ab53202f9 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 941c6626e8d0189fe7ca36ff05643d78acea807001eb78055fac25245f217182 all runs: crashed: possible deadlock in br_multicast_rcv testing release v5.15 testing commit 8bb7eca972ad531c9b149c0a51ab43a417385813 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 80213040ea75f1d9a10781bf1a60a1746953eed62fe1772502c0de9e0896a12d all runs: crashed: possible deadlock in br_multicast_rcv testing release v5.14 testing commit 7d2a07b769330c34b4deabeed939325c77a7ec2f gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 8318298dbd5a849fbcce1cedec1fea5366d427b5590cb943fe1923287b8cd161 all runs: crashed: possible deadlock in br_multicast_rcv testing release v5.13 testing commit 62fb9874f5da54fdb243003b386128037319b219 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 6f493003b8f53a80991b67f4303382f2366c67c783c38dd68a9708b462c0524c all runs: crashed: possible deadlock in br_multicast_rcv testing release v5.12 testing commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 647116980fa9c21e5989dd18647beb9d3d2ec0cba48d23ae98361fd118a996ca all runs: crashed: possible deadlock in br_multicast_rcv testing release v5.11 testing commit f40ddce88593482919761f74910f42f4b84c004b gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 40e610035c0b70a18d16ade3a42ecb927fc8592c5d8cab9d1a3540b907c5f16d all runs: OK # git bisect start 9f4ad9e425a1d3b6a34617b8ea226d56a119a717 f40ddce88593482919761f74910f42f4b84c004b Bisecting: 6798 revisions left to test after this (roughly 13 steps) [d99676af540c2dc829999928fb81c58c80a1dce4] Merge tag 'drm-next-2021-02-19' of git://anongit.freedesktop.org/drm/drm testing commit d99676af540c2dc829999928fb81c58c80a1dce4 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: dce6da45d87321a43582ff6cdc8acdb9bf8770941661eaf2304c64002b770149 run #0: crashed: WARNING in kvm_wait 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: boot failed: WARNING in kvm_wait reproducer seems to be flaky # git bisect bad d99676af540c2dc829999928fb81c58c80a1dce4 Bisecting: 3717 revisions left to test after this (roughly 12 steps) [f9d58de23152f2c16f326d7e014cfa2933b00304] Merge tag 'affs-for-5.12-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux testing commit f9d58de23152f2c16f326d7e014cfa2933b00304 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e8874d514b603812633d61abf281b5c0afd69815726b94ab157aecae81ba907e all runs: OK # git bisect good f9d58de23152f2c16f326d7e014cfa2933b00304 Bisecting: 1854 revisions left to test after this (roughly 11 steps) [de1617578849acab8e16c9ffdce39b91fb50639d] Merge tag 'media/v5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media testing commit de1617578849acab8e16c9ffdce39b91fb50639d gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e71644dddab35bef5d0c755b2f249756f3f11652e9d1be57221fd06e3b587313 run #0: crashed: WARNING in kvm_wait run #1: crashed: WARNING in kvm_wait run #2: crashed: WARNING in kvm_wait run #3: crashed: WARNING in kvm_wait 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: boot failed: WARNING in kvm_wait run #17: boot failed: WARNING in kvm_wait run #18: boot failed: WARNING in kvm_wait run #19: crashed: INFO: task hung in addrconf_dad_work # git bisect bad de1617578849acab8e16c9ffdce39b91fb50639d Bisecting: 929 revisions left to test after this (roughly 10 steps) [4a037ad5d115b2cc79a5071a7854475f365476fa] Merge tag 'for-linus-5.12-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip testing commit 4a037ad5d115b2cc79a5071a7854475f365476fa gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: b02b85fc50ae7f35948b6a0321b2007624a3660d9bf6d84caced8dd72edd5b1f run #0: crashed: unregister_netdevice: waiting for DEV to become free 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: boot failed: WARNING in kvm_wait run #15: boot failed: WARNING in kvm_wait run #16: boot failed: WARNING in kvm_wait run #17: boot failed: WARNING in kvm_wait run #18: boot failed: WARNING in kvm_wait run #19: boot failed: WARNING in kvm_wait # git bisect bad 4a037ad5d115b2cc79a5071a7854475f365476fa Bisecting: 451 revisions left to test after this (roughly 9 steps) [582cd91f69de8e44857cb610ebca661dac8656b7] Merge tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block testing commit 582cd91f69de8e44857cb610ebca661dac8656b7 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 8b34c1330de6e23ec1ee21ad3265f07acc7a0dd4cf0385fcb89ab1c03b33432e all runs: OK # git bisect good 582cd91f69de8e44857cb610ebca661dac8656b7 Bisecting: 247 revisions left to test after this (roughly 8 steps) [3f6ec19f2d05d800bbc42d95dece433da7697864] Merge tag 'timers-core-2021-02-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit 3f6ec19f2d05d800bbc42d95dece433da7697864 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 23a8faf45fb84bdc7ef3a68d420d633534391b694476c04b66c5c58daebc3e30 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: 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: crashed: INFO: task hung in switchdev_deferred_process_work run #19: crashed: INFO: task hung in switchdev_deferred_process_work # git bisect bad 3f6ec19f2d05d800bbc42d95dece433da7697864 Bisecting: 101 revisions left to test after this (roughly 7 steps) [41be53e94fb04cc69fdf2f524c2a05d8069e047b] io_uring: kill cached requests from exiting task closing the ring testing commit 41be53e94fb04cc69fdf2f524c2a05d8069e047b gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 3b65673d261f2557ca57855a7f981a2a70c2f5da35ba70977bb575435177b3a2 all runs: OK # git bisect good 41be53e94fb04cc69fdf2f524c2a05d8069e047b Bisecting: 50 revisions left to test after this (roughly 6 steps) [40244ad36bcfb796a6bb9e95bdcbf8ddf3134509] nvmet: set status to 0 in case for invalid nsid testing commit 40244ad36bcfb796a6bb9e95bdcbf8ddf3134509 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 7b9ed3c0375cb0df73c84a3d4a6fd2f09a72e609796b26d9227babf4d3130611 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: 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: crashed: INFO: task hung in addrconf_dad_work # git bisect bad 40244ad36bcfb796a6bb9e95bdcbf8ddf3134509 Bisecting: 25 revisions left to test after this (roughly 5 steps) [2547906982e2e6a0d42f8957f55af5bb51a7e55f] nvme-core: add cancel tagset helpers testing commit 2547906982e2e6a0d42f8957f55af5bb51a7e55f gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 85da1943c4a503f2b7df0e7dec98005009ce73a2d112aa3454e39f8200b2c4ea all runs: OK # git bisect good 2547906982e2e6a0d42f8957f55af5bb51a7e55f Bisecting: 12 revisions left to test after this (roughly 4 steps) [9f233ffe02e5cef611100cd8c5bcf4de26ca7bef] Revert "bcache: Kill btree_io_wq" testing commit 9f233ffe02e5cef611100cd8c5bcf4de26ca7bef gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e789ac69d5a8f555638160337183d64f305dbe60cce9029ed86fc9cb19b89ec6 all runs: OK # git bisect good 9f233ffe02e5cef611100cd8c5bcf4de26ca7bef Bisecting: 6 revisions left to test after this (roughly 3 steps) [dda3248e7fc306e0ce3612ae96bdd9a36e2ab04f] nvme: introduce a nvme_host_path_error helper testing commit dda3248e7fc306e0ce3612ae96bdd9a36e2ab04f gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 43f320fb18c733a9c5e4fafc3cbfdc1e64d1070dbac08345fd40b43a70ac42dc run #0: crashed: INFO: task hung in switchdev_deferred_process_work 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 dda3248e7fc306e0ce3612ae96bdd9a36e2ab04f Bisecting: 2 revisions left to test after this (roughly 2 steps) [6751c1e3cff3aa763c760c08862627069a37b50e] bcache: Avoid comma separated statements testing commit 6751c1e3cff3aa763c760c08862627069a37b50e gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 4d889703c3085782926cf99609fbf08b409aa98663ed259b9b9882585e4d1b8e all runs: OK # git bisect good 6751c1e3cff3aa763c760c08862627069a37b50e Bisecting: 0 revisions left to test after this (roughly 1 step) [83fba8c8114748a18e20391565cfdfdf8466075c] blk-mq: introduce blk_mq_set_request_complete testing commit 83fba8c8114748a18e20391565cfdfdf8466075c gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: b4d5971c691c3345181dab2a346fa63122dd4853015c02e7a93669fb25fd0c77 all runs: OK # git bisect good 83fba8c8114748a18e20391565cfdfdf8466075c dda3248e7fc306e0ce3612ae96bdd9a36e2ab04f is the first bad commit commit dda3248e7fc306e0ce3612ae96bdd9a36e2ab04f Author: Chao Leng Date: Thu Feb 4 08:55:11 2021 +0100 nvme: introduce a nvme_host_path_error helper When using nvme native multipathing, if a path related error occurs during ->queue_rq, the request needs to be completed with NVME_SC_HOST_PATH_ERROR so that the request can be failed over. Introduce a helper to complete the command from ->queue_rq in a wait that invokes nvme_complete_rq. Signed-off-by: Chao Leng [hch: renamed, added a return value to clean up the callers a bit] Signed-off-by: Christoph Hellwig drivers/nvme/host/core.c | 15 +++++++++++++++ drivers/nvme/host/nvme.h | 1 + 2 files changed, 16 insertions(+) culprit signature: 43f320fb18c733a9c5e4fafc3cbfdc1e64d1070dbac08345fd40b43a70ac42dc parent signature: b4d5971c691c3345181dab2a346fa63122dd4853015c02e7a93669fb25fd0c77 Reproducer flagged being flaky revisions tested: 25, total time: 5h42m16.128272427s (build: 2h47m8.475299267s, test: 2h51m2.302269776s) first bad commit: dda3248e7fc306e0ce3612ae96bdd9a36e2ab04f nvme: introduce a nvme_host_path_error helper recipients (to): ["axboe@fb.com" "hch@lst.de" "hch@lst.de" "kbusch@kernel.org" "lengchao@huawei.com" "linux-nvme@lists.infradead.org" "sagi@grimberg.me"] recipients (cc): ["linux-kernel@vger.kernel.org"] crash: INFO: task hung in switchdev_deferred_process_work INFO: task kworker/0:1:14 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:27232 pid: 14 ppid: 2 flags:0x00004000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 switchdev_deferred_process_work+0x5/0x10 net/switchdev/switchdev.c:74 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task kworker/1:1:34 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:25520 pid: 34 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 addrconf_dad_work+0x9f/0x10c0 net/ipv6/addrconf.c:4029 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task kworker/0:2:2911 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:26568 pid: 2911 ppid: 2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 linkwatch_event+0x5/0x50 net/core/link_watch.c:250 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task kworker/0:3:3140 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:26504 pid: 3140 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 addrconf_dad_work+0x9f/0x10c0 net/ipv6/addrconf.c:4029 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task dhcpcd:4982 blocked for more than 144 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:26352 pid: 4982 ppid: 1 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 vlan_ioctl_handler+0xa0/0xb50 net/8021q/vlan.c:557 sock_ioctl+0x25e/0x570 net/socket.c:1146 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:739 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f66278260e7 RSP: 002b:00007ffe1e8b9f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000055835b0d99b0 RCX: 00007f66278260e7 RDX: 00007ffe1e8b9f50 RSI: 0000000000008982 RDI: 0000000000000011 RBP: 0000000000000002 R08: 0000000000000008 R09: 0000000000000000 R10: 00007ffe1e8ca5c0 R11: 0000000000000246 R12: 00007ffe1e8b9f50 R13: 00007ffe1e8b9fd0 R14: 000055835b0d99b0 R15: 000055835b0d7bd8 INFO: task syz-executor407:13521 blocked for more than 144 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor407 state:D stack:25008 pid:13521 ppid: 13495 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:672 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2345 ___sys_sendmsg+0xd3/0x150 net/socket.c:2399 __sys_sendmsg+0xb2/0x140 net/socket.c:2432 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fbe94d28419 RSP: 002b:00007ffd1ad1cda8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000004b561 RCX: 00007fbe94d28419 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000007 RBP: 0000000000000000 R08: 00007ffd1ad1cf48 R09: 00007ffd1ad1cf48 R10: 00007ffd1ad1cf48 R11: 0000000000000246 R12: 00007ffd1ad1cdbc R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1599 Comm: khungtaskd Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x9a/0xcc lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0x951/0xc20 kernel/hung_task.c:294 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 118 Comm: kworker/u4:3 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: netns cleanup_net RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:__local_bh_disable_ip+0x31/0xb0 kernel/softirq.c:139 Code: a9 00 00 0f 00 55 53 89 f3 0f 85 82 00 00 00 9c 5d fa 65 01 1d 90 1f c4 7e 65 8b 05 89 1f c4 7e 48 31 d8 f6 c4 ff 74 15 55 9d <65> 8b 05 78 1f c4 7e 25 ff ff ff 7f 39 d8 74 0a 5b 5d c3 e8 07 69 RSP: 0018:ffffc90000fcf7c0 EFLAGS: 00000246 RAX: 0000000000000007 RBX: 0000000000000200 RCX: 1ffffffff18f5fa3 RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff86c98cfb RBP: 0000000000000246 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff150d090 R11: 0000000000000001 R12: 00000000000040e8 R13: ffffc90000fcf858 R14: 00000000000081cf R15: ffff888010dd2f00 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555c252c0 CR3: 000000001e408000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: local_bh_disable include/linux/bottom_half.h:19 [inline] get_next_corpse net/netfilter/nf_conntrack_core.c:2198 [inline] nf_ct_iterate_cleanup+0xff/0x2e0 net/netfilter/nf_conntrack_core.c:2244 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2329 [inline] nf_ct_iterate_cleanup_net+0xf9/0x150 net/netfilter/nf_conntrack_core.c:2314 masq_device_event+0x8d/0xc0 net/netfilter/nf_nat_masquerade.c:88 notifier_call_chain+0x94/0x170 kernel/notifier.c:83 call_netdevice_notifiers_extack net/core/dev.c:2052 [inline] call_netdevice_notifiers net/core/dev.c:2066 [inline] dev_close_many+0x298/0x580 net/core/dev.c:1641 rollback_registered_many+0x365/0x1290 net/core/dev.c:9472 unregister_netdevice_many.part.0+0x10/0x2b0 net/core/dev.c:10735 unregister_netdevice_many net/core/dev.c:10734 [inline] default_device_exit_batch+0x2a9/0x370 net/core/dev.c:11218 cleanup_net+0x423/0x990 net/core/net_namespace.c:604 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296