REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "gφ;eσKιΧ«>pquota"
INFO: task syz-executor3:10803 blocked for more than 120 seconds.
Not tainted 4.16.0+ #10
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3 D20944 10803 4492 0x80000002
Call Trace:
context_switch kernel/sched/core.c:2862 [inline]
__schedule+0x8fb/0x1ec0 kernel/sched/core.c:3440
schedule+0xf5/0x430 kernel/sched/core.c:3499
schedule_timeout+0x1a3/0x230 kernel/time/timer.c:1777
do_wait_for_common kernel/sched/completion.c:86 [inline]
__wait_for_common kernel/sched/completion.c:107 [inline]
wait_for_common kernel/sched/completion.c:118 [inline]
wait_for_completion+0x415/0x770 kernel/sched/completion.c:139
__wait_rcu_gp+0x221/0x340 kernel/rcu/update.c:414
synchronize_sched.part.64+0xac/0x100 kernel/rcu/tree.c:3212
synchronize_sched+0x76/0xf0 kernel/rcu/tree.c:3213
tracepoint_synchronize_unregister include/linux/tracepoint.h:80 [inline]
perf_trace_event_unreg.isra.2+0xb7/0x1f0 kernel/trace/trace_event_perf.c:161
perf_trace_destroy+0xbc/0x100 kernel/trace/trace_event_perf.c:236
tp_perf_event_destroy+0x15/0x20 kernel/events/core.c:7976
_free_event+0x3bd/0x10f0 kernel/events/core.c:4121
put_event+0x24/0x30 kernel/events/core.c:4204
perf_event_release_kernel+0x6e8/0xfc0 kernel/events/core.c:4310
perf_release+0x37/0x50 kernel/events/core.c:4320
__fput+0x327/0x7e0 fs/file_table.c:209
____fput+0x15/0x20 fs/file_table.c:243
task_work_run+0x199/0x270 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0x9bb/0x1ad0 kernel/exit.c:865
do_group_exit+0x149/0x400 kernel/exit.c:968
get_signal+0x73a/0x16d0 kernel/signal.c:2469
do_signal+0x90/0x1e90 arch/x86/kernel/signal.c:809
exit_to_usermode_loop+0x258/0x2f0 arch/x86/entry/common.c:162
prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
do_syscall_64+0x6ec/0x940 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455269
RSP: 002b:00007f8976371ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 000000000072bec8 RCX: 0000000000455269
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec8
RBP: 000000000072bec8 R08: 0000000000000000 R09: 000000000072bea0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe793f79cf R14: 00007f89763729c0 R15: 0000000000000000
Showing all locks held in the system:
2 locks held by khungtaskd/876:
#0: (rcu_read_lock){....}, at: [<000000008f2bec4b>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline]
#0: (rcu_read_lock){....}, at: [<000000008f2bec4b>] watchdog+0x1c5/0xd60 kernel/hung_task.c:249
#1: (tasklist_lock){.+.+}, at: [<0000000006b3009f>] debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470
2 locks held by getty/4414:
#0: (&tty->ldisc_sem){++++}, at: [<00000000e51437c8>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000762a7320>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4415:
#0: (&tty->ldisc_sem){++++}, at: [<00000000e51437c8>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000762a7320>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4416:
#0: (&tty->ldisc_sem){++++}, at: [<00000000e51437c8>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000762a7320>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4417:
#0: (&tty->ldisc_sem){++++}, at: [<00000000e51437c8>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000762a7320>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4418:
#0: (&tty->ldisc_sem){++++}, at: [<00000000e51437c8>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000762a7320>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4419:
#0: (&tty->ldisc_sem){++++}, at: [<00000000e51437c8>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000762a7320>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
2 locks held by getty/4420:
#0: (&tty->ldisc_sem){++++}, at: [<00000000e51437c8>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000762a7320>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131
1 lock held by syz-executor3/10803:
#0: (event_mutex){+.+.}, at: [<00000000c507b78a>] perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:234
4 locks held by syz-executor5/10816:
#0: (&tty->legacy_mutex){+.+.}, at: [<00000000567b7b94>] tty_lock+0x5d/0x90 drivers/tty/tty_mutex.c:19
#1: (&tty->legacy_mutex/1){+.+.}, at: [<00000000567b7b94>] tty_lock+0x5d/0x90 drivers/tty/tty_mutex.c:19
#2: (&tty->ldisc_sem){++++}, at: [<000000002b6b6a29>] tty_ldisc_ref+0x1b/0x80 drivers/tty/tty_ldisc.c:298
#3: (&o_tty->termios_rwsem/1){++++}, at: [<0000000007d9a7a4>] n_tty_flush_buffer+0x21/0x320 drivers/tty/n_tty.c:357
1 lock held by syz-executor2/10827:
#0: (event_mutex){+.+.}, at: [<00000000c507b78a>] perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:234
1 lock held by blkid/10832:
#0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<000000006e2f031e>] lo_ioctl+0x8b/0x1b70 drivers/block/loop.c:1355
1 lock held by syz-executor4/10835:
#0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<000000006e2f031e>] lo_ioctl+0x8b/0x1b70 drivers/block/loop.c:1355
1 lock held by syz-executor4/10845:
#0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<000000006e2f031e>] lo_ioctl+0x8b/0x1b70 drivers/block/loop.c:1355
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 876 Comm: khungtaskd Not tainted 4.16.0+ #10
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+0x194/0x24d lib/dump_stack.c:53
nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x123/0x180 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:138 [inline]
check_hung_task kernel/hung_task.c:132 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline]
watchdog+0x90c/0xd60 kernel/hung_task.c:249
INFO: rcu_sched self-detected stall on CPU
0-....: (124996 ticks this GP) idle=75e/1/4611686018427387906 softirq=33205/33205 fqs=30980
(t=125000 jiffies g=17618 c=17617 q=921)
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7457 Comm: kworker/u4:5 Not tainted 4.16.0+ #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound flush_to_ldisc
RIP: 0010:__process_echoes+0x641/0x770 drivers/tty/n_tty.c:733
RSP: 0018:ffff8801af4ff078 EFLAGS: 00000217
RAX: 0000000000000000 RBX: ffffc90003673000 RCX: ffffffff8352d4c2
RDX: 0000000000000006 RSI: 1ffff10039602994 RDI: ffffc9000367515e
RBP: ffff8801af4ff0e0 R08: 1ffff10035e9fdb5 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000625628efd
R13: dffffc0000000000 R14: 0000000000000efe R15: 0000000000001b15
FS: 0000000000000000(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd5bfa4ca8 CR3: 000000000846a005 CR4: 00000000001606f0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
commit_echoes+0x147/0x1b0 drivers/tty/n_tty.c:764
n_tty_receive_char_fast drivers/tty/n_tty.c:1416 [inline]
n_tty_receive_buf_fast drivers/tty/n_tty.c:1576 [inline]
__receive_buf drivers/tty/n_tty.c:1611 [inline]
n_tty_receive_buf_common+0x1156/0x2520 drivers/tty/n_tty.c:1709
n_tty_receive_buf2+0x33/0x40 drivers/tty/n_tty.c:1744
tty_ldisc_receive_buf+0xa7/0x180 drivers/tty/tty_buffer.c:456
tty_port_default_receive_buf+0x106/0x160 drivers/tty/tty_port.c:38
receive_buf drivers/tty/tty_buffer.c:475 [inline]
flush_to_ldisc+0x3c4/0x590 drivers/tty/tty_buffer.c:524
process_one_work+0xc47/0x1bb0 kernel/workqueue.c:2113
worker_thread+0x223/0x1990 kernel/workqueue.c:2247
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406
Code: 60 12 00 00 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 42 0f b6 04 28 38 d0 7f 08 84 c0 0f 85 21 01 00 00 42 80 bc 33 60 12 00 00 82 <74> 0f e8 48 90 1e fe 4d 8d 74 24 02 e9 58 ff ff ff e8 39 90 1e