INFO: task syz-executor.0:8460 blocked for more than 140 seconds.
Not tainted 4.14.152 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D27440 8460 30686 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383
schedule+0x92/0x1c0 kernel/sched/core.c:3427
exp_funnel_lock kernel/rcu/tree_exp.h:295 [inline]
_synchronize_rcu_expedited+0x6ca/0x8b0 kernel/rcu/tree_exp.h:596
synchronize_rcu_expedited kernel/rcu/tree_exp.h:724 [inline]
synchronize_rcu_expedited+0x35/0xb0 kernel/rcu/tree_exp.h:713
synchronize_net+0x2f/0x50 net/core/dev.c:8222
__unregister_prot_hook+0x22e/0x2a0 net/packet/af_packet.c:382
packet_do_bind+0x5ec/0xb20 net/packet/af_packet.c:3150
packet_bind+0x138/0x190 net/packet/af_packet.c:3233
SYSC_bind+0x1d3/0x220 net/socket.c:1489
SyS_bind+0x24/0x30 net/socket.c:1475
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a219
RSP: 002b:00007ff6ffad7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a219
RDX: 0000000000000014 RSI: 0000000020000640 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff6ffad86d4
R13: 00000000004c0601 R14: 00000000004d2d58 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1001:
#0: (tasklist_lock){.+.+}, at: [<ffffffff814875a8>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4544
1 lock held by rsyslogd/6728:
#0: (&f->f_pos_lock){+.+.}, at: [<ffffffff8194526b>] __fdget_pos+0xab/0xd0 fs/file.c:769
2 locks held by getty/6850:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861c4153>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310f506>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6851:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861c4153>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310f506>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6852:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861c4153>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310f506>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6853:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861c4153>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310f506>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6854:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861c4153>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310f506>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6855:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861c4153>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310f506>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6856:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861c4153>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310f506>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.0/8460:
#0: (sk_lock-AF_PACKET){+.+.}, at: [<ffffffff8561e0e4>] lock_sock include/net/sock.h:1462 [inline]
#0: (sk_lock-AF_PACKET){+.+.}, at: [<ffffffff8561e0e4>] packet_do_bind+0x34/0xb20 net/packet/af_packet.c:3112
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1001 Comm: khungtaskd Not tainted 4.14.152 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x138/0x197 lib/dump_stack.c:53
nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x141/0x189 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5e7/0xb90 kernel/hung_task.c:274
kthread+0x319/0x430 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff861c4c3e