INFO: task hung in switchdev_deferred_process

INFO: task hung in switchdev_deferred_process_work (2)
Status: upstream: reported C repro on 2020/07/27 17:04
Reported-by: syzbot+8ecc009e206a956ab317@syzkaller.appspotmail.com
First crash: 549d, last: 19h56m

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: SYZFAIL: ioctl(HCIDEVUP) failed (log)
Repro: C syz .config

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in switchdev_deferred_process_work				35	736d	1273d	0/22	closed as invalid on 2019/10/23 07:26
linux-4.19	INFO: task hung in switchdev_deferred_process_work				34	29d	588d	0/1	upstream: reported on 2020/03/08 04:06

Sample crash report:

INFO: task kworker/1:0:8387 blocked for more than 143 seconds.
      Not tainted 5.11.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0     state:D stack:25896 pid: 8387 ppid:     2 flags:0x00004000
Workqueue: events switchdev_deferred_process_work
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213
 __mutex_lock_common kernel/locking/mutex.c:1023 [inline]
 __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093
 switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
INFO: task kworker/1:6:9697 blocked for more than 143 seconds.
      Not tainted 5.11.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:6     state:D stack:25688 pid: 9697 ppid:     2 flags:0x00004000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213
 __mutex_lock_common kernel/locking/mutex.c:1023 [inline]
 __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093
 rfkill_global_led_trigger_worker+0x17/0x110 net/rfkill/core.c:180
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
INFO: task syz-executor417:12942 blocked for more than 143 seconds.
      Not tainted 5.11.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor417 state:D stack:23856 pid:12942 ppid: 12792 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213
 __mutex_lock_common kernel/locking/mutex.c:1023 [inline]
 __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093
 rtnl_lock net/core/rtnetlink.c:72 [inline]
 rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5550
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502
 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:674
 __sys_sendto+0x21c/0x320 net/socket.c:1977
 __do_sys_sendto net/socket.c:1989 [inline]
 __se_sys_sendto net/socket.c:1985 [inline]
 __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1985
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x40c6dc
RSP: 002b:00000000005ffdf0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000601080 RCX: 000000000040c6dc
RDX: 0000000000000020 RSI: 00000000006010d0 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00000000005ffe44 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000005fff10
R13: 00000000006010d0 R14: 0000000000000004 R15: 0000000000000000
INFO: task kworker/0:28:21057 blocked for more than 144 seconds.
      Not tainted 5.11.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:28    state:D stack:27096 pid:21057 ppid:     2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213
 __mutex_lock_common kernel/locking/mutex.c:1023 [inline]
 __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093
 addrconf_dad_work+0xa3/0x12b0 net/ipv6/addrconf.c:4031
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
INFO: task kworker/1:14:21066 blocked for more than 144 seconds.
      Not tainted 5.11.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:14    state:D stack:27392 pid:21066 ppid:     2 flags:0x00004000
Workqueue: events linkwatch_event
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213
 __mutex_lock_common kernel/locking/mutex.c:1023 [inline]
 __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093
 linkwatch_event+0xb/0x60 net/core/link_watch.c:250
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
INFO: task syz-executor417:21726 blocked for more than 144 seconds.
      Not tainted 5.11.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor417 state:D stack:28528 pid:21726 ppid:  8422 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213
 __mutex_lock_common kernel/locking/mutex.c:1023 [inline]
 __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093
 cfg80211_rfkill_set_block net/wireless/core.c:304 [inline]
 cfg80211_rfkill_set_block+0x23/0x40 net/wireless/core.c:297
 rfkill_set_block+0x1f9/0x540 net/rfkill/core.c:343
 rfkill_fop_write+0x267/0x500 net/rfkill/core.c:1267
 vfs_write+0x28e/0xa30 fs/read_write.c:603
 ksys_write+0x1ee/0x250 fs/read_write.c:658
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x453a49
RSP: 002b:00007ff5d8620208 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004f0028 RCX: 0000000000453a49
RDX: 0000000000000008 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00000000004f0020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004f002c
R13: 00000000005ffbcf R14: 00007ff5d8620300 R15: 0000000000022000
INFO: task syz-executor417:21727 blocked for more than 144 seconds.
      Not tainted 5.11.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor417 state:D stack:28528 pid:21727 ppid:  8422 flags:0x00000004
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213
 __mutex_lock_common kernel/locking/mutex.c:1023 [inline]
 __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093
 rfkill_fop_open+0xfe/0x700 net/rfkill/core.c:1147
 misc_open+0x372/0x4a0 drivers/char/misc.c:141
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x11b0 fs/open.c:826
 do_open fs/namei.c:3365 [inline]
 path_openat+0x1c0e/0x27e0 fs/namei.c:3498
 do_filp_open+0x17e/0x3c0 fs/namei.c:3525
 do_sys_openat2+0x16d/0x420 fs/open.c:1187
 do_sys_open fs/open.c:1203 [inline]
 __do_sys_openat fs/open.c:1219 [inline]
 __se_sys_openat fs/open.c:1214 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1214
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x453a49
RSP: 002b:00007ff5d85ff208 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000004f0038 RCX: 0000000000453a49
RDX: 0000000000000001 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00000000004f0030 R08: 00007ff5d85ff700 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004f003c
R13: 00000000005ffbcf R14: 00007ff5d85ff300 R15: 0000000000022000

Showing all locks held in the system:
5 locks held by kworker/u4:5/826:
 #0: ffff888140753138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888140753138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff888140753138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff888140753138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
 #0: ffff888140753138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
 #0: ffff888140753138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246
 #1: ffffc900032dfda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250
 #2: ffffffff8d669490 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:557
 #3: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_unregistering net/core/dev.c:11378 [inline]
 #3: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xe8/0x3c0 net/core/dev.c:11416
 #4: ffffffff8bf7cd28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
 #4: ffffffff8bf7cd28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fa/0x620 kernel/rcu/tree_exp.h:836
1 lock held by khungtaskd/1664:
 #0: ffffffff8bf74160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327
1 lock held by in:imklog/8074:
 #0: ffff88801c2520f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:961
3 locks held by kworker/1:0/8387:
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246
 #1: ffffc9000172fda8 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250
 #2: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
3 locks held by kworker/1:6/9697:
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246
 #1: ffffc9000a9c7da8 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250
 #2: ffffffff8da55548 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x17/0x110 net/rfkill/core.c:180
1 lock held by syz-executor417/12942:
 #0: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5550
2 locks held by kworker/u4:8/20993:
2 locks held by kworker/0:27/21056:
 #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
 #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
 #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246
 #1: ffffc9000b457da8 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250
3 locks held by kworker/0:28/21057:
 #0: ffff888021399d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888021399d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff888021399d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff888021399d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
 #0: ffff888021399d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
 #0: ffff888021399d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246
 #1: ffffc9000b467da8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250
 #2: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x12b0 net/ipv6/addrconf.c:4031
3 locks held by kworker/1:14/21066:
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
 #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246
 #1: ffffc9000b4f7da8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250
 #2: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:250
2 locks held by syz-executor417/21726:
 #0: ffffffff8da55548 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0xff/0x500 net/rfkill/core.c:1259
 #1: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: cfg80211_rfkill_set_block net/wireless/core.c:304 [inline]
 #1: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: cfg80211_rfkill_set_block+0x23/0x40 net/wireless/core.c:297
2 locks held by syz-executor417/21727:
 #0: ffffffff8c964868 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
 #1: ffffffff8da55548 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_open+0xfe/0x700 net/rfkill/core.c:1147

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1664 Comm: khungtaskd Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0xfa/0x151 lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 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+0xd48/0xfb0 kernel/hung_task.c:294
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 20993 Comm: kworker/u4:8 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x3c/0x54c0 kernel/locking/lockdep.c:4758
Code: 89 f5 53 48 81 ec e8 00 00 00 48 8b 84 24 20 01 00 00 48 c7 84 24 88 00 00 00 b3 8a b5 41 48 c7 84 24 90 00 00 00 05 be eb 8a <48> c7 84 24 98 00 00 00 e0 c9 58 81 44 89 44 24 08 48 89 44 24 20
RSP: 0018:ffffc9000b2d7a60 EFLAGS: 00000086
RAX: 0000000000000000 RBX: 1ffff9200165af76 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8bf74160
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: fffffbfff1b8c4f1 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8bf74160 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f56f8869000 CR3: 000000001c7ee000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire kernel/locking/lockdep.c:5510 [inline]
 lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
 rcu_lock_acquire include/linux/rcupdate.h:267 [inline]
 rcu_read_lock include/linux/rcupdate.h:656 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:404 [inline]
 batadv_nc_worker+0x12d/0xe50 net/batman-adv/network-coding.c:715
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Crashes (504):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce	2021/02/28 01:08	upstream	5695e5161974	4c37c133	.config	log	report	syz	C		INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce	2021/09/20 20:29	upstream	e4e737bb5c17	af796c18	.config	log	report	syz			INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-selinux-root	2021/09/15 18:18	upstream	3ca706c189db	07e953c1	.config	log	report	syz			INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/10/01 01:09	upstream	02d5e016800d	1d849ab4	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/30 19:47	upstream	02d5e016800d	1d849ab4	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/29 21:35	upstream	02d5e016800d	be530f6c	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/29 16:10	upstream	02d5e016800d	be530f6c	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/29 14:24	upstream	a4e6f95a891a	be530f6c	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-root	2021/09/29 05:27	upstream	a4e6f95a891a	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/28 16:43	upstream	d33bec7b3dfa	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-selinux-root	2021/09/28 15:42	upstream	d33bec7b3dfa	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce	2021/09/28 02:26	upstream	0513e464f900	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-selinux-root	2021/09/27 23:25	upstream	0513e464f900	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce	2021/09/27 22:22	upstream	5816b3e6577e	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-root	2021/09/27 19:59	upstream	5816b3e6577e	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/27 10:29	upstream	5816b3e6577e	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/27 09:22	upstream	996148ee05d0	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-selinux-root	2021/09/26 20:56	upstream	996148ee05d0	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce	2021/09/26 18:15	upstream	a3b397b4fffb	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-selinux-root	2021/09/26 16:41	upstream	a3b397b4fffb	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/26 15:01	upstream	a3b397b4fffb	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/26 13:45	upstream	a3b397b4fffb	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-root	2021/09/26 12:02	upstream	a3b397b4fffb	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce	2021/09/26 07:50	upstream	a5e0aceabef6	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-selinux-root	2021/09/26 05:56	upstream	a5e0aceabef6	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-selinux-root	2021/09/26 03:39	upstream	a5e0aceabef6	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-selinux-root	2021/09/26 02:19	upstream	a5e0aceabef6	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-root	2021/09/25 22:52	upstream	a5e0aceabef6	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce	2021/09/25 19:38	upstream	7d42e9818258	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce	2021/09/25 16:00	upstream	7d42e9818258	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/25 14:22	upstream	7d42e9818258	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-smack-root	2021/09/25 10:54	upstream	7d42e9818258	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-386	2021/09/29 06:37	upstream	a4e6f95a891a	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-386	2021/09/28 14:12	upstream	0513e464f900	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-386	2021/09/27 14:45	upstream	5816b3e6577e	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-this-kasan-gce	2021/10/02 23:07	net	7cd8b1542a7b	db0f5787	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-bpf-kasan-gce	2021/09/28 13:09	bpf	79e2c3066675	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-bpf-kasan-gce	2021/09/28 10:26	bpf	2248c2fca9c2	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-bpf-kasan-gce	2021/09/26 21:06	bpf	a3debf177f21	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/10/14 13:44	net-next	9974cb5c8790	5462d470	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-bpf-next-kasan-gce	2021/10/01 02:15	bpf-next	e68ac0082787	1d849ab4	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/30 22:38	net-next	69508d43334e	1d849ab4	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/30 02:56	net-next	ef91abfb20c7	be530f6c	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/29 11:52	net-next	b69c99463d41	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/29 09:09	net-next	b69c99463d41	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-bpf-next-kasan-gce	2021/09/29 07:24	bpf-next	72e1781a5de9	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/28 23:02	net-next	b69c99463d41	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/28 19:12	net-next	b69c99463d41	d82cb927	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/28 01:14	net-next	b69c99463d41	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/27 06:28	net-next	d59bdda85eb7	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/26 22:41	net-next	d59bdda85eb7	78494d16	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/26 00:49	net-next	24aa160d5375	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/25 21:32	net-next	24aa160d5375	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-net-kasan-gce	2021/09/25 11:55	net-next	acde891c243c	8cac236e	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-linux-next-kasan-gce-root	2021/10/16 14:05	linux-next	7c832d2f9b95	0c5d9412	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-linux-next-kasan-gce-root	2021/10/06 06:03	linux-next	29616f67fcbd	0a63fd36	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-linux-next-kasan-gce-root	2021/09/21 11:40	linux-next	83fa5857d812	af796c18	.config	log	report			info	INFO: task hung in switchdev_deferred_process_work
ci-upstream-kasan-gce-root	2021/01/17 02:50	upstream	0da0a8a0a0e1	65a7a854	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/07/23 16:59	upstream	d15be546031c	340ea530	.config	log	report
ci-upstream-kasan-gce-root	2020/04/15 18:36	upstream	8632e9b5645b	3f3c5574	.config	log	report