[20027] 0 20027 18210 12843 34 4 0 0 syz-executor.1 [20069] 0 20069 18210 12843 34 4 0 0 syz-executor.1 [20088] 0 20088 18210 12843 34 4 0 0 syz-executor.1 [20114] 0 20114 18243 12845 34 4 0 0 syz-executor.1 INFO: task syz-executor.4:28367 blocked for more than 140 seconds. Not tainted 4.14.134+ #18 [20145] 0 20145 18210 12268 33 4 0 0 syz-executor.1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [20200] 0 20200 18243 12845 34 4 0 0 syz-executor.1 syz-executor.4 D29608 28367 7591 0x00000004 Call Trace: [20253] 0 20253 18210 12684 34 4 0 0 syz-executor.1 schedule+0x92/0x1c0 /kernel/sched/core.c:3498 [20322] 0 20322 18177 8749 26 4 0 0 syz-executor.2 [20333] 0 20333 18243 8750 34 4 0 0 syz-executor.0 __lock_sock+0x12b/0x220 /net/core/sock.c:2235 lock_sock_nested+0xe1/0x100 /net/core/sock.c:2759 [20382] 0 20382 18144 8747 28 4 0 0 syz-executor.4 [20412] 0 20412 18144 8713 26 3 0 0 syz-executor.4 lock_sock /./include/net/sock.h:1462 [inline] packet_setsockopt+0x33b/0x27a0 /net/packet/af_packet.c:3881 [20416] 0 20416 18210 12843 34 4 0 0 syz-executor.1 [20445] 0 20445 18210 12316 34 4 0 0 syz-executor.1 [20493] 0 20493 18177 8746 27 4 0 0 syz-executor.0 [20504] 0 20504 18210 12843 34 4 0 0 syz-executor.1 [20644] 0 20644 18210 12843 34 4 0 0 syz-executor.1 [20668] 0 20668 18210 12843 34 4 0 0 syz-executor.1 INFO: task syz-executor.4:28382 blocked for more than 140 seconds. Not tainted 4.14.134+ #18 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [20693] 0 20693 18210 8749 27 4 0 0 syz-executor.0 syz-executor.4 D30384 28382 7591 0x00000004 Call Trace: [20696] 0 20696 18210 12843 34 4 0 0 syz-executor.1 [20747] 0 20747 18210 12843 34 4 0 0 syz-executor.1 schedule+0x92/0x1c0 /kernel/sched/core.c:3498 __lock_sock+0x12b/0x220 /net/core/sock.c:2235 [20749] 0 20749 18144 8748 27 4 0 0 syz-executor.2 [20779] 0 20779 18144 8744 26 4 0 0 syz-executor.1 lock_sock_nested+0xe1/0x100 /net/core/sock.c:2759 [20788] 0 20788 18210 12843 34 4 0 0 syz-executor.1 lock_sock /./include/net/sock.h:1462 [inline] packet_setsockopt+0x33b/0x27a0 /net/packet/af_packet.c:3881 [20809] 0 20809 18210 12843 34 4 0 0 syz-executor.1 [20975] 0 20975 18210 12843 34 4 0 0 syz-executor.1 [20979] 0 20979 18243 8752 27 4 0 0 syz-executor.4 [20983] 0 20983 18243 8752 27 4 0 0 syz-executor.4 Showing all locks held in the system: [21017] 0 21017 18210 12843 34 4 0 0 syz-executor.1 [21063] 0 21063 18210 12843 34 4 0 0 syz-executor.1 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.?}, at: [<00000000773c5eb6>] debug_show_all_locks+0x7c/0x21a /kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/1625: #0: (&ei->i_mmap_sem){++++}, at: [<000000007e24183b>] ext4_filemap_fault+0x7c/0xb0 /fs/ext4/inode.c:6178 1 lock held by cron/1660: #0: (&ei->i_mmap_sem){++++}, at: [<000000007e24183b>] ext4_filemap_fault+0x7c/0xb0 /fs/ext4/inode.c:6178 2 locks held by getty/1753: #0: (&tty->ldisc_sem){++++}, at: [<0000000004973f5c>] tty_ldisc_ref_wait+0x22/0x80 /drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000003336b8a2>] n_tty_read+0x1f7/0x1700 /drivers/tty/n_tty.c:2156 1 lock held by syz-executor.4/28365: #0: (sk_lock-AF_PACKET){+.+.}, at: [<00000000deb65754>] lock_sock /./include/net/sock.h:1462 [inline] #0: (sk_lock-AF_PACKET){+.+.}, at: [<00000000deb65754>] packet_setsockopt+0xe19/0x27a0 /net/packet/af_packet.c:3693 1 lock held by syz-executor.4/28381: #0: (sk_lock-AF_PACKET){+.+.}, at: [<00000000deb65754>] lock_sock /./include/net/sock.h:1462 [inline] #0: (sk_lock-AF_PACKET){+.+.}, at: [<00000000deb65754>] packet_setsockopt+0xe19/0x27a0 /net/packet/af_packet.c:3693 ============================================= [21103] 0 21103 18177 8715 26 3 0 0 syz-executor.4 [21140] 0 21140 18210 8717 32 3 0 0 syz-executor.4 [21262] 0 21262 18177 8749 26 4 0 0 syz-executor.2 [21266] 0 21266 18243 12845 34 4 0 0 syz-executor.1 [21325] 0 21325 18210 12843 34 4 0 0 syz-executor.1 [21386] 0 21386 18210 12843 34 4 0 0 syz-executor.1 [21397] 0 21397 18210 8751 26 4 0 0 syz-executor.2 [21408] 0 21408 18210 8750 26 4 0 0 syz-executor.2 [21445] 0 21445 18210 8751 26 4 0 0 syz-executor.2 [21449] 0 21449 18210 12843 34 4 0 0 syz-executor.1 NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.134+ #18 Call Trace: __dump_stack /lib/dump_stack.c:17 [inline] dump_stack+0xca/0x134 /lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 /lib/nmi_backtrace.c:101 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1625 Comm: rsyslogd Not tainted 4.14.134+ #18 task: 00000000de7f46f4 task.stack: 000000004e2a4537 RIP: 0010:strlen+0x3f/0x90 /lib/string.c:482 RSP: 0000:ffff8881d017f2c0 EFLAGS: 00000006 RAX: ffffffffa90af809 RBX: dffffc0000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff8881d2973d98 RDI: ffffffffa90af800 RBP: ffffffffa90af800 R08: 00000000000023d9 R09: fffffbfff534593a R10: fffffbfff5345939 R11: ffffffffa9a2c9cb R12: 1ffff1103a02fe62 R13: 0000000000000000 R14: ffffffffa96c0820 R15: ffff8881d017f390 FS: 00007fce3cc74700(0000) GS:ffff8881d7700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000c6b2b8 CR3: 00000001d1c78002 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: trace_event_get_offsets_lock /./include/trace/events/lock.h:39 [inline] perf_trace_lock+0xe1/0x4e0 /./include/trace/events/lock.h:39 trace_lock_release /./include/trace/events/lock.h:58 [inline] lock_release+0x4e9/0x740 /kernel/locking/lockdep.c:4009 Code: 03 53 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 48 80 7d 00 00 74 39 48 bb 00 00 00 00 00 fc ff df 48 89 e8 <48> 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a [21491] 0 21491 18210 8757 26 4 0 0 syz-executor.2 [21492] 0 21492 18210 12783 34 4 0 0 syz-executor.1 [21545] 0 21545 18210 12843 34 4 0 0 syz-executor.1 [21574] 0 21574 18210 12843 34 4 0 0 syz-executor.1 [21605] 0 21605 18210 12843 34 4 0 0 syz-executor.1 [21661] 0 21661 18210 12843 34 4 0 0 syz-executor.1