INFO: task syz-executor.2:12169 blocked for more than 143 seconds. Not tainted 5.9.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27976 pid:12169 ppid: 6890 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0xec9/0x2280 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 __lock_sock+0x13d/0x260 net/core/sock.c:2504 lock_sock_nested+0xf1/0x110 net/core/sock.c:3036 lock_sock include/net/sock.h:1581 [inline] mptcp_getsockopt+0x28/0x1d0 net/mptcp/protocol.c:2240 __sys_getsockopt+0x219/0x4c0 net/socket.c:2173 __do_sys_getsockopt net/socket.c:2188 [inline] __se_sys_getsockopt net/socket.c:2185 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2185 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e179 Code: Bad RIP value. RSP: 002b:00007fbec9f28c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000004b40 RCX: 000000000045e179 RDX: 0000000000000063 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000118cf90 R08: 0000000020000380 R09: 0000000000000000 R10: 0000000020000340 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffe61f7bdcf R14: 00007fbec9f299c0 R15: 000000000118cf4c Showing all locks held in the system: 2 locks held by kworker/u4:1/21: #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 kernel/workqueue.c:2240 #1: ffffc90000dd7da8 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244 2 locks held by kworker/u4:2/27: #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 kernel/workqueue.c:2240 #1: ffffc90000e37da8 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244 1 lock held by khungtaskd/1172: #0: ffffffff8a068400 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5852 1 lock held by khugepaged/1186: #0: ffffffff8a133268 (lock#5){+.+.}-{3:3}, at: lru_add_drain_all+0x59/0x6c0 mm/swap.c:780 3 locks held by kworker/1:3/4119: 1 lock held by in:imklog/6574: #0: ffff888094dd6170 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc6-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+0x198/0x1fd lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 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+0xd7d/0x1000 kernel/hung_task.c:295 kthread+0x3b5/0x4a0 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: 261 Comm: kworker/u4:4 Not tainted 5.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy4 ieee80211_iface_work RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:765 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:787 [inline] RIP: 0010:lock_acquire+0x12e/0xaf0 kernel/locking/lockdep.c:5025 Code: 00 00 41 8b bf 04 09 00 00 85 ff 0f 85 e0 02 00 00 48 c7 c0 e0 6b fc 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 <0f> 85 2d 08 00 00 48 83 3d c4 52 a0 08 00 0f 84 9c 06 00 00 9c 58 RSP: 0018:ffffc90001497808 EFLAGS: 00000046 RAX: 1ffffffff13f8d7c RBX: 0000000000000001 RCX: ffffffff815c189e RDX: dffffc0000000000 RSI: ffffffff8a068340 RDI: 0000000000000000 RBP: ffffffff8d657370 R08: 0000000000000000 R09: ffffffff8b5c12cf R10: fffffbfff16b8259 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a93f82c0 FS: 0000000000000000(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc863f0a000 CR3: 0000000093178000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x94/0xce kernel/locking/spinlock.c:159 debug_object_deactivate lib/debugobjects.c:710 [inline] debug_object_deactivate+0x101/0x300 lib/debugobjects.c:698 debug_timer_deactivate kernel/time/timer.c:732 [inline] debug_deactivate kernel/time/timer.c:781 [inline] detach_timer kernel/time/timer.c:826 [inline] detach_if_pending+0x82/0x4d0 kernel/time/timer.c:847 __mod_timer+0x490/0xe30 kernel/time/timer.c:1024 ieee80211_sta_merge_ibss net/mac80211/ibss.c:1301 [inline] ieee80211_ibss_work+0x442/0xe80 net/mac80211/ibss.c:1710 ieee80211_iface_work+0x7d2/0x8f0 net/mac80211/iface.c:1492 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294