[ 8487] 0 8487 17601 8198 24 3 0 1000 syz-executor3 [ 8498] 0 8498 17601 8230 25 4 0 1000 syz-executor1 [ 8501] 0 8501 17601 8231 25 4 0 1000 syz-executor4 [ 8502] 0 8502 17601 8198 24 3 0 1000 syz-executor1 [ 8504] 0 8504 17601 8199 24 3 0 1000 syz-executor4 INFO: task syz-executor5:14598 blocked for more than 140 seconds. [ 8528] 0 8528 17601 8231 25 4 0 1000 syz-executor4 Not tainted 4.14.91+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D30384 14598 1880 0x00000004 [ 8539] 0 8539 17601 8198 24 3 0 1000 syz-executor1 Call Trace: [ 8540] 0 8540 17601 8199 24 3 0 1000 syz-executor4 [ 8569] 0 8569 17634 8232 25 4 0 1000 syz-executor1 schedule+0x92/0x1c0 kernel/sched/core.c:3490 __lock_sock+0x12b/0x220 net/core/sock.c:2237 [ 8585] 0 8585 17601 8198 24 3 0 1000 syz-executor1 [ 8900] 0 8900 17601 8230 26 4 0 1000 syz-executor3 lock_sock_nested+0xe1/0x100 net/core/sock.c:2758 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x4b7/0x2830 net/packet/af_packet.c:3794 [ 9044] 0 9044 17667 8232 25 4 0 1000 syz-executor1 [ 9060] 0 9060 17667 8232 25 4 0 1000 syz-executor1 [ 9077] 0 9077 17634 8201 23 3 0 1000 syz-executor5 [ 9089] 0 9089 17667 8203 23 3 0 1000 syz-executor5 [ 9103] 0 9103 17601 8199 23 3 0 1000 syz-executor5 [ 9116] 0 9116 17601 8197 24 3 0 1000 syz-executor2 INFO: task syz-executor5:14607 blocked for more than 140 seconds. Not tainted 4.14.91+ #3 [ 9120] 0 9120 17601 8198 24 3 0 1000 syz-executor0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 9122] 0 9122 17601 8198 24 3 0 1000 syz-executor4 [ 9125] 0 9125 17601 8199 23 3 0 1000 syz-executor5 [ 9142] 0 9142 17601 8228 25 4 0 1000 syz-executor1 [ 9145] 0 9145 17634 8201 23 3 0 1000 syz-executor5 syz-executor5 D30384 14607 1880 0x00000004 [ 9147] 0 9147 17634 8199 24 3 0 1000 syz-executor2 Call Trace: [ 9149] 0 9149 17601 8198 24 3 0 1000 syz-executor4 [ 9154] 0 9154 17634 8199 25 3 0 1000 syz-executor3 schedule+0x92/0x1c0 kernel/sched/core.c:3490 __lock_sock+0x12b/0x220 net/core/sock.c:2237 [ 9159] 0 9159 17634 8230 25 4 0 1000 syz-executor1 [ 9167] 0 9167 17601 8198 24 3 0 1000 syz-executor4 lock_sock_nested+0xe1/0x100 net/core/sock.c:2758 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x4b7/0x2830 net/packet/af_packet.c:3794 [ 9174] 0 9174 17634 8199 24 3 0 1000 syz-executor2 [ 9175] 0 9175 17634 8199 25 3 0 1000 syz-executor3 [ 9185] 0 9185 17601 8198 24 3 0 1000 syz-executor0 [ 9190] 0 9190 17634 8199 24 3 0 1000 syz-executor1 [ 9192] 0 9192 17601 8198 24 3 0 1000 syz-executor4 [ 9194] 0 9194 17601 8197 24 3 0 1000 syz-executor3 [ 9196] 0 9196 17601 8197 24 3 0 1000 syz-executor2 [ 9198] 0 9198 17601 8199 23 3 0 1000 syz-executor5 [ 9216] 0 9216 17601 8199 23 3 0 1000 syz-executor5 [ 9217] 0 9217 17634 8200 24 3 0 1000 syz-executor4 [ 9219] 0 9219 17601 8197 24 3 0 1000 syz-executor3 [ 9221] 0 9221 17601 8198 24 3 0 1000 syz-executor0 Showing all locks held in the system: [ 9230] 0 9230 17634 8201 23 3 0 1000 syz-executor5 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 [ 9240] 0 9240 17601 8197 24 3 0 1000 syz-executor3 2 locks held by getty/1743: #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 ============================================= [ 9242] 0 9242 17601 8197 24 3 0 1000 syz-executor2 [ 9245] 0 9245 17634 8200 24 3 0 1000 syz-executor0 [ 9246] 0 9246 17634 8199 24 3 0 1000 syz-executor1 NMI backtrace for cpu 1 [ 9253] 0 9253 17601 8198 24 3 0 1000 syz-executor4 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.91+ #3 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 [ 9258] 0 9258 17601 8197 24 3 0 1000 syz-executor3 Sending NMI from CPU 1 to CPUs 0: [ 9261] 0 9261 17634 8199 24 3 0 1000 syz-executor1 NMI backtrace for cpu 0 CPU: 0 PID: 5089 Comm: syz-fuzzer Not tainted 4.14.91+ #3 task: ffff8881c7b14680 task.stack: ffff8881c7aa8000 RIP: 0010:format_decode+0x328/0x8f0 lib/vsprintf.c:2042 RSP: 0018:ffff8881c7aaf390 EFLAGS: 00000083 RAX: ffffffffb7226f08 RBX: ffffffffb785cc2a RCX: 0000000000000002 RDX: 0000000000000002 RSI: 0000000000000075 RDI: ffffffffb785cc28 RBP: ffff8881c7aaf4a0 R08: ffffffffb785cc2a R09: fffffbfff727e619 R10: fffffbfff727e618 R11: ffffffffb93f30c6 R12: ffffffffb785cc26 R13: 1ffff11038f55e74 R14: ffffffffb785cc29 R15: 000000000000006c FS: 000000c421690e68(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa8c609cfe0 CR3: 00000001d0e64001 CR4: 00000000001606b0 DR0: ffffffffffffffff DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: Code: 25 0f 84 0a 04 00 00 8d 46 a8 3c 20 0f 87 71 01 00 00 0f b6 c0 48 8b 04 c5 e8 77 b0 b7 e9 01 c1 3d 00 e8 7c 1d ae fe c6 45 05 08 73 1d ae fe 41 80 ff 4c 0f 84 71 02 00 00 e8 64 1d ae fe 41