[ 5935] 0 5935 18178 8746 26 4 0 1000 syz-executor.3 [ 5964] 0 5964 18178 8717 25 4 0 0 syz-executor.2 [ 5971] 0 5971 18112 8742 26 4 0 0 syz-executor.1 [ 6004] 0 6004 18211 8748 26 4 0 1000 syz-executor.3 INFO: task syz-executor.0:5398 blocked for more than 140 seconds. Not tainted 4.14.105+ #28 [ 6020] 0 6020 18178 8717 25 4 0 0 syz-executor.2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 6059] 0 6059 18178 8717 25 4 0 0 syz-executor.2 syz-executor.0 D30528 5398 1860 0x00000004 Call Trace: [ 6095] 0 6095 18145 8744 26 4 0 1000 syz-executor.3 [ 6110] 0 6110 18178 8717 25 4 0 0 syz-executor.2 schedule+0x92/0x1c0 kernel/sched/core.c:3492 [ 6141] 0 6141 18178 8717 25 4 0 0 syz-executor.2 __lock_sock+0x12b/0x220 net/core/sock.c:2238 [ 6160] 0 6160 18174 8747 26 4 0 1000 syz-executor.3 lock_sock_nested+0xe1/0x100 net/core/sock.c:2762 lock_sock include/net/sock.h:1456 [inline] packet_setsockopt+0x395/0x2830 net/packet/af_packet.c:3675 [ 6177] 0 6177 18145 8744 26 4 0 0 syz-executor.1 [ 6189] 0 6189 18145 8744 26 4 0 1000 syz-executor.3 [ 6193] 0 6193 18178 8716 25 4 0 0 syz-executor.2 [ 6210] 0 6210 18178 8747 26 4 0 1000 syz-executor.3 [ 6239] 0 6239 18178 8716 25 4 0 0 syz-executor.2 [ 6267] 0 6267 18112 8742 26 4 0 0 syz-executor.1 INFO: task syz-executor.0:5443 blocked for more than 140 seconds. [ 6275] 0 6275 18178 8716 25 4 0 0 syz-executor.2 Not tainted 4.14.105+ #28 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 6294] 0 6294 18178 8746 26 4 0 1000 syz-executor.3 [ 6321] 0 6321 18178 8746 26 4 0 1000 syz-executor.3 syz-executor.0 D30000 5443 1860 0x00000004 Call Trace: [ 6322] 0 6322 18178 8716 25 4 0 0 syz-executor.2 schedule+0x92/0x1c0 kernel/sched/core.c:3492 __lock_sock+0x12b/0x220 net/core/sock.c:2238 [ 6359] 0 6359 18178 8746 26 4 0 1000 syz-executor.3 [ 6384] 0 6384 18178 8716 25 4 0 0 syz-executor.2 [ 6409] 0 6409 18178 8746 26 4 0 1000 syz-executor.3 lock_sock_nested+0xe1/0x100 net/core/sock.c:2762 lock_sock include/net/sock.h:1456 [inline] packet_setsockopt+0x395/0x2830 net/packet/af_packet.c:3675 [ 6434] 0 6434 18178 8716 25 4 0 0 syz-executor.2 [ 6466] 0 6466 18178 8746 26 4 0 1000 syz-executor.3 [ 6491] 0 6491 18178 8717 25 4 0 0 syz-executor.2 [ 6516] 0 6516 18178 8746 26 4 0 1000 syz-executor.3 [ 6532] 0 6532 18178 8746 26 4 0 1000 syz-executor.3 [ 6543] 0 6543 18178 8717 25 4 0 0 syz-executor.2 INFO: task syz-executor.0:5444 blocked for more than 140 seconds. Not tainted 4.14.105+ #28 [ 6582] 0 6582 18145 8744 26 4 0 1000 syz-executor.3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 6595] 0 6595 18178 8746 26 4 0 1000 syz-executor.3 syz-executor.0 D29328 5444 1860 0x00000004 Call Trace: [ 6603] 0 6603 18178 8717 25 4 0 0 syz-executor.2 [ 6615] 0 6615 18178 8746 26 4 0 1000 syz-executor.3 schedule+0x92/0x1c0 kernel/sched/core.c:3492 [ 6648] 0 6648 18178 8746 26 4 0 1000 syz-executor.3 __lock_sock+0x12b/0x220 net/core/sock.c:2238 [ 6687] 0 6687 18178 8746 26 4 0 1000 syz-executor.3 lock_sock_nested+0xe1/0x100 net/core/sock.c:2762 [ 6718] 0 6718 18178 8747 26 4 0 1000 syz-executor.3 lock_sock include/net/sock.h:1456 [inline] packet_setsockopt+0x395/0x2830 net/packet/af_packet.c:3675 [ 6738] 0 6738 18145 8744 26 4 0 1000 syz-executor.3 [ 6742] 0 6742 18112 8742 26 4 0 0 syz-executor.1 [ 6760] 0 6760 18145 8744 26 4 0 0 syz-executor.1 [ 6766] 0 6766 18178 8746 26 4 0 1000 syz-executor.3 [ 6793] 0 6793 18178 8746 26 4 0 1000 syz-executor.3 [ 6821] 0 6821 18145 8744 26 4 0 1000 syz-executor.3 Showing all locks held in the system: 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/1764: #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 1 lock held by syz-executor.1/10027: #0: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds+0x51/0x110 fs/exec.c:1389 ============================================= [ 6937] 0 6937 18145 8744 26 4 0 1000 syz-executor.3 [ 6954] 0 6954 18178 8746 26 4 0 1000 syz-executor.3 [ 6990] 0 6990 18211 8748 26 4 0 1000 syz-executor.3 [ 7057] 0 7057 18178 8746 26 4 0 1000 syz-executor.3 [ 7076] 0 7076 18147 8744 26 4 0 1000 syz-executor.3 [ 7086] 0 7086 18178 8746 26 4 0 1000 syz-executor.3 [ 7164] 0 7164 18112 8710 25 3 0 1000 syz-executor.3 [ 7170] 0 7170 18178 8714 25 3 0 1000 syz-executor.3 NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.105+ #28 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 [ 7176] 0 7176 18112 8742 26 4 0 0 syz-executor.1 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5446 Comm: init Not tainted 4.14.105+ #28 task: ffff88819b869780 task.stack: ffff888084ab0000 RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline] RIP: 0010:hlist_empty include/linux/list.h:641 [inline] RIP: 0010:perf_trace_lock+0x353/0x4e0 include/trace/events/lock.h:39 RSP: 0000:ffff888084ab7310 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffe8ffffd132b8 RCX: 0000000000000004 RDX: ffffe8ffffd132b8 RSI: 1ffffffff1a18485 RDI: ffffffff8d0c2428 RBP: ffff888084ab73e8 R08: 0000000000003804 R09: 0000000000000000 R10: ffff88819b86a028 R11: 0000000000000001 R12: 1ffff11010956e68 R13: 0000000000000000 R14: ffffffff8d2c0100 R15: ffff888084ab73c0 FS: 00007f10bca4a7a0(0000) GS:ffff8881d7500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f75c0a76a74 CR3: 0000000084b4a001 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x4d8/0x730 kernel/locking/lockdep.c:4009 Code: 65 48 33 04 25 28 00 00 00 0f 85 a6 00 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 48 89 da <48> c1 ea 03 80 3c 02 00 0f 85 65 01 00 00 48 8b 03 48 85 c0 0f [ 7188] 0 7188 18178 8746 26 4 0 1000 syz-executor.3 [ 7217] 0 7217 18178 8746 26 4 0 1000 syz-executor.3 [ 7267] 0 7267 18112 8743 26 5 0 0 syz-executor.2 [ 7268] 0 7268 18112 8701 24 3 0 0 syz-executor.1 [ 7280] 0 7280 18112 8743 26 5 0 0 syz-executor.2 [ 7292] 0 7292 18112 8743 26 5 0 0 syz-executor.2 [ 7304] 0 7304 18178 8746 26 4 0 1000 syz-executor.3