INFO: task syz-executor542:6832 blocked for more than 143 seconds. Not tainted 5.9.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor542 state:D stack:23584 pid: 6832 ppid: 6831 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1855 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x163/0x260 kernel/sched/completion.c:138 __flush_work+0x51f/0xab0 kernel/workqueue.c:3046 __cancel_work_timer+0x5de/0x700 kernel/workqueue.c:3133 tls_sk_proto_close+0x4a7/0xaf0 net/tls/tls_main.c:305 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:475 __sock_release+0xcd/0x280 net/socket.c:596 sock_close+0x18/0x20 net/socket.c:1277 __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:140 [inline] exit_to_user_mode_prepare+0x195/0x1c0 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:242 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x403950 Code: Bad RIP value. RSP: 002b:00007ffcb4dcd7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000403950 RDX: 00000000000000d8 RSI: 00000000200005c0 RDI: 0000000000000004 RBP: 00007ffcb4dcd800 R08: 0000000000000000 R09: 00000000000000d8 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcb4dcd810 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 3 locks held by kworker/0:1/12: #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 kernel/workqueue.c:2240 #1: ffffc90000d2fda8 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244 #2: ffff888094d794d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 net/tls/tls_sw.c:2251 1 lock held by khungtaskd/1169: #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5825 1 lock held by in:imklog/6522: #0: ffff8880a8c9cb70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 1 lock held by syz-executor542/6832: #0: ffff8880907e7c90 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:779 [inline] #0: ffff8880907e7c90 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:595 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1169 Comm: khungtaskd Not tainted 5.9.0-rc2-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+0x18f/0x20d 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3901 Comm: systemd-journal Not tainted 5.9.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_accessed kernel/locking/lockdep.c:1441 [inline] RIP: 0010:__bfs kernel/locking/lockdep.c:1516 [inline] RIP: 0010:__bfs+0x18b/0x530 kernel/locking/lockdep.c:1479 Code: 49 81 eb e0 ce 76 8c 48 c1 e8 03 42 80 3c 28 00 0f 85 9c 02 00 00 49 8b 77 10 4c 8d 46 4c 4c 89 c0 48 c1 e8 03 42 0f b6 3c 28 <4c> 89 c0 83 e0 07 83 c0 03 40 38 f8 7c 09 40 84 ff 0f 85 3c 02 00 RSP: 0018:ffffc90005367548 EFLAGS: 00000807 RAX: 1ffffffff18c585c RBX: ffffffff8c801d48 RCX: 1ffffffff18bfd3f RDX: 1ffffffff182ff17 RSI: ffffffff8c62c298 RDI: 0000000000000000 RBP: ffffc90005367628 R08: ffffffff8c62c2e4 R09: ffffffff8c62a800 R10: 00000000000056af R11: 000000000006f7e8 R12: ffffffff815949c0 R13: dffffc0000000000 R14: ffffffff8c62a830 R15: ffffffff8c7dc6c8 FS: 00007f57fef298c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f57fc2d1000 CR3: 000000009281b000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __bfs_backwards kernel/locking/lockdep.c:1554 [inline] check_irq_usage+0x146/0xb40 kernel/locking/lockdep.c:2259 check_prev_add kernel/locking/lockdep.c:2500 [inline] check_prevs_add kernel/locking/lockdep.c:2601 [inline] validate_chain kernel/locking/lockdep.c:3218 [inline] __lock_acquire+0x2a81/0x5640 kernel/locking/lockdep.c:4426 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5005 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 rq_lock kernel/sched/sched.h:1292 [inline] __schedule+0x232/0x21e0 kernel/sched/core.c:4445 preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:4785 irqentry_exit_cond_resched kernel/entry/common.c:333 [inline] irqentry_exit_cond_resched kernel/entry/common.c:325 [inline] irqentry_exit+0x65/0x90 kernel/entry/common.c:363 asm_sysvec_reschedule_ipi+0x12/0x20 arch/x86/include/asm/idtentry.h:586 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline] RIP: 0010:lock_acquire+0x27b/0xad0 kernel/locking/lockdep.c:5008 Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 f8 06 00 00 48 83 3d aa ce 5b 08 00 0f 84 a6 05 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7 RSP: 0018:ffffc90005367bd8 EFLAGS: 00000286 RAX: 1ffffffff136c779 RBX: ffff888092f5a380 RCX: ffffffff815a14fb RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8c5f39ff R10: fffffbfff18be73f R11: 0000000000000000 R12: 0000000000000001 R13: ffff88809285b8e8 R14: 0000000000000000 R15: ffff888092f5a380 __might_fault mm/memory.c:4883 [inline] __might_fault+0x152/0x1d0 mm/memory.c:4868 _copy_to_user+0x29/0x160 lib/usercopy.c:27 copy_to_user include/linux/uaccess.h:168 [inline] devkmsg_read+0x5c5/0x9c0 kernel/printk/printk.c:936 vfs_read+0x1df/0x5a0 fs/read_write.c:479 ksys_read+0x12d/0x250 fs/read_write.c:607 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f57fe4b9210 Code: 73 01 c3 48 8b 0d 98 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d b9 c1 20 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 4e fc ff ff 48 89 04 24 RSP: 002b:00007ffc7e485178 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007ffc7e487bf0 RCX: 00007f57fe4b9210 RDX: 0000000000002000 RSI: 00007ffc7e4859f0 RDI: 0000000000000009 RBP: 0000000000000000 R08: 0000000000000008 R09: 00007ffc7e4d30f0 R10: 0000000000012bba R11: 0000000000000246 R12: 00007ffc7e4859f0 R13: 00007ffc7e487b48 R14: 0000562d3af48958 R15: 0005ae1aa14f5e90