[28295] 0 28295 17634 8459 25 4 0 0 syz-executor5 [28313] 0 28313 17667 8463 26 4 0 0 syz-executor2 [28334] 0 28334 17634 8483 26 4 0 1000 syz-executor3 [28348] 0 28348 17634 12723 31 3 0 1000 syz-executor4 [28373] 0 28373 17634 8463 25 4 0 0 syz-executor2 INFO: task syz-executor3:11037 blocked for more than 140 seconds. Not tainted 4.14.91+ #2 [28396] 0 28396 17601 8459 26 4 0 0 syz-executor2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D30384 11037 7015 0x00000004 [28415] 0 28415 17634 12723 31 3 0 1000 syz-executor4 Call Trace: [28494] 0 28494 17634 12723 31 3 0 1000 syz-executor4 [28508] 0 28508 17634 12723 31 3 0 1000 syz-executor4 schedule+0x92/0x1c0 kernel/sched/core.c:3490 __lock_sock+0x12b/0x220 net/core/sock.c:2237 [28526] 0 28526 17634 8478 25 4 0 1000 syz-executor3 lock_sock_nested+0xe1/0x100 net/core/sock.c:2758 [28552] 0 28552 17634 8460 25 4 0 0 syz-executor2 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x592/0x2830 net/packet/af_packet.c:3742 [28576] 0 28576 17667 8237 25 3 0 0 syz-executor5 [28580] 0 28580 17634 12723 31 3 0 1000 syz-executor4 [28642] 0 28642 17634 12723 31 3 0 1000 syz-executor4 [28684] 0 28684 17667 8461 25 4 0 0 syz-executor5 [28706] 0 28706 17601 8233 24 3 0 0 syz-executor1 [28714] 0 28714 17634 8236 24 3 0 0 syz-executor1 [28721] 0 28721 17601 8233 24 3 0 0 syz-executor5 INFO: task syz-executor3:11042 blocked for more than 140 seconds. Not tainted 4.14.91+ #2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [28727] 0 28727 17634 12723 31 3 0 1000 syz-executor4 syz-executor3 D30384 11042 7015 0x00000004 Call Trace: [28784] 0 28784 17634 12723 31 3 0 1000 syz-executor4 [28788] 0 28788 17634 12725 31 3 0 0 syz-executor2 [28823] 0 28823 17634 12723 31 3 0 1000 syz-executor4 schedule+0x92/0x1c0 kernel/sched/core.c:3490 __lock_sock+0x12b/0x220 net/core/sock.c:2237 [28828] 0 28828 17700 12817 31 3 0 0 syz-executor2 lock_sock_nested+0xe1/0x100 net/core/sock.c:2758 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x592/0x2830 net/packet/af_packet.c:3742 [28858] 0 28858 17700 11266 30 4 0 0 syz-executor2 [28867] 0 28867 17634 12723 31 3 0 1000 syz-executor4 [28946] 0 28946 17634 12723 31 3 0 1000 syz-executor4 [29006] 0 29006 17634 12723 31 3 0 1000 syz-executor4 [29058] 0 29058 17634 12723 31 3 0 1000 syz-executor4 Showing all locks held in the system: [29080] 0 29080 17667 8478 25 4 0 1000 syz-executor3 [29110] 0 29110 17634 12723 31 3 0 1000 syz-executor4 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 2 locks held by getty/1740: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 ============================================= [29122] 0 29122 17667 8478 25 4 0 1000 syz-executor3 [29167] 0 29167 17634 12723 31 3 0 1000 syz-executor4 [29255] 0 29255 17634 12723 31 3 0 1000 syz-executor4 [29315] 0 29315 17634 12753 31 3 0 1000 syz-executor4 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.91+ #2 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 11039 Comm: syz-executor3 Not tainted 4.14.91+ #2 task: ffff888012605e00 task.stack: ffff888015e50000 RIP: 0010:mark_lock+0xa6/0xfa0 kernel/locking/lockdep.c:3164 RSP: 0000:ffff888015e570a0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffffab77eb10 RCX: 1ffff110024c0cd4 RDX: 1ffffffff56efd68 RSI: ffff888012606680 RDI: ffffffffab77eb40 RBP: ffff888012606680 R08: 0000000000000001 R09: 0000000000040234 R10: ffff888012606680 R11: 1ffff110024c0ccf R12: 0000000000000040 R13: ffff8880126066a0 R14: ffff888012605e00 R15: 0000000000000006 FS: 00007f79d6f6b700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000040351f CR3: 0000000084e24003 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: mark_irqflags kernel/locking/lockdep.c:3086 [inline] __lock_acquire+0x548/0x3fa0 kernel/locking/lockdep.c:3444 Code: 50 01 00 00 48 81 eb 50 01 00 00 48 81 c3 20 08 75 ab 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 90 0b 00 00 4c 85 63 30 0f 84 a0 00 00 00 41 bc 01 00 00 [29405] 0 29405 17634 12723 31 3 0 0 syz-executor1