NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
INFO: task syz-executor.3:7427 blocked for more than 140 seconds.
Not tainted 4.14.173-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D25440 7427 1 0x00000004
Call Trace:
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893
fuse_lock_inode+0xb0/0xe0 fs/fuse/inode.c:365
fuse_lookup+0x6c/0x330 fs/fuse/dir.c:367
lookup_slow+0x213/0x410 fs/namei.c:1696
walk_component+0x648/0x1bc0 fs/namei.c:1825
link_path_walk+0x717/0xed0 fs/namei.c:2154
path_mountpoint+0xac/0x1970 fs/namei.c:2718
filename_mountpoint+0x16c/0x320 fs/namei.c:2745
SYSC_umount fs/namespace.c:1730 [inline]
SyS_umount+0x10a/0x340 fs/namespace.c:1714
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45f277
RSP: 002b:00007fffd1f666d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 000000000002d752 RCX: 000000000045f277
RDX: 0000000000402f28 RSI: 0000000000000002 RDI: 00007fffd1f66780
RBP: 00000000000000cc R08: 0000000000000000 R09: 000000000000000f
R10: 000000000000000a R11: 0000000000000246 R12: 00007fffd1f67810
R13: 00000000020a1940 R14: 0000000000000000 R15: 00007fffd1f67810
Showing all locks held in the system:
1 lock held by khungtaskd/1057:
#0: (tasklist_lock){.+.+}, at: [<ffffffff81465b23>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4544
2 locks held by getty/7383:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff833ad812>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff833a1454>] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156
2 locks held by getty/7384:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff833ad812>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff833a1454>] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156
2 locks held by getty/7385:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff833ad812>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff833a1454>] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156
2 locks held by getty/7386:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff833ad812>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff833a1454>] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156
2 locks held by getty/7387:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff833ad812>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff833a1454>] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156
2 locks held by getty/7388:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff833ad812>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff833a1454>] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156
2 locks held by getty/7389:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff833ad812>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff833a1454>] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.3/7427:
#0: (&type->i_mutex_dir_key#7){++++}, at: [<ffffffff818d6129>] inode_lock_shared include/linux/fs.h:728 [inline]
#0: (&type->i_mutex_dir_key#7){++++}, at: [<ffffffff818d6129>] lookup_slow+0x129/0x410 fs/namei.c:1674
#1: (&fi->mutex){+.+.}, at: [<ffffffff82210f80>] fuse_lock_inode+0xb0/0xe0 fs/fuse/inode.c:365
2 locks held by syz-executor.3/9494:
#0: (&type->i_mutex_dir_key#7){++++}, at: [<ffffffff818d6129>] inode_lock_shared include/linux/fs.h:728 [inline]
#0: (&type->i_mutex_dir_key#7){++++}, at: [<ffffffff818d6129>] lookup_slow+0x129/0x410 fs/namei.c:1674
#1: (&fi->mutex){+.+.}, at: [<ffffffff82210f80>] fuse_lock_inode+0xb0/0xe0 fs/fuse/inode.c:365
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1057 Comm: khungtaskd Not tainted 4.14.173-syzkaller #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+0x13e/0x194 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5e2/0xb80 kernel/hung_task.c:274
kthread+0x30d/0x420 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
CPU: 0 PID: 121 Comm: kworker/u4:3 Not tainted 4.14.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
task: ffff8880a9514300 task.stack: ffff8880a9518000
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/paravirt.h:784 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:797 [inline]
RIP: 0010:lock_acquire+0xac/0x3f0 kernel/locking/lockdep.c:3989
RSP: 0018:ffff8880a951fcb8 EFLAGS: 00000282
RAX: 0000000000000282 RBX: ffff8880a9514300 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8880a9514b7c
RBP: ffffffff87d84360 R08: 0000000000000000 R09: 0000000000000000
R10: ffff8880a9514bd0 R11: ffff8880a9514300 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff79faee79 CR3: 0000000096228000 CR4: 00000000001406f0
DR0: 0000000020000100 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:242 [inline]
rcu_read_lock include/linux/rcupdate.h:629 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline]
batadv_nc_worker+0x103/0x6d0 net/batman-adv/network-coding.c:726
process_one_work+0x813/0x1540 kernel/workqueue.c:2114
worker_thread+0x5d1/0x1070 kernel/workqueue.c:2248
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 0f 85 3d 03 00 00 48 83 3d f0 2f 8b 06 00 0f 84 95 02 00 00 9c 58 0f 1f 44 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 44 24 08 <48> c7 c0 90 66 d1 87 48 c1 e8 03 80 3c 10 00 0f 85 f3 02 00 00