INFO: task syz-executor.5:13824 blocked for more than 143 seconds.
Not tainted 5.4.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D29712 13824 9081 0x00000004
Call Trace:
context_switch kernel/sched/core.c:3385 [inline]
__schedule+0x8e1/0x1f30 kernel/sched/core.c:4081
do_task_dead+0xc7/0x100 kernel/sched/core.c:4098
do_exit+0x18d8/0x2ef0 kernel/exit.c:849
do_group_exit+0x135/0x360 kernel/exit.c:895
get_signal+0x47c/0x24f0 kernel/signal.c:2734
do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815
exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:160
prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
do_syscall_64+0x676/0x790 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a679
Code: Bad RIP value.
RSP: 002b:00007f3526125c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: 0000000000000003 RBX: 0000000000000003 RCX: 000000000045a679
RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f35261266d4
R13: 00000000004ca369 R14: 00000000004e31d8 R15: 00000000ffffffff
Showing all locks held in the system:
3 locks held by kworker/u4:0/7:
#0: ffff88821b6bf928 ((wq_completion)netns){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff88821b6bf928 ((wq_completion)netns){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88821b6bf928 ((wq_completion)netns){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff88821b6bf928 ((wq_completion)netns){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff88821b6bf928 ((wq_completion)netns){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff88821b6bf928 ((wq_completion)netns){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff88821b6bf928 ((wq_completion)netns){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2235
#1: ffff8880a989fdc0 (net_cleanup_work){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2239
#2: ffffffff895a7d58 (rcu_state.barrier_mutex){+.+.}, at: rcu_barrier+0x47/0x350 kernel/rcu/tree.c:2926
5 locks held by ksoftirqd/0/9:
3 locks held by kworker/1:1/95:
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2235
#1: ffff8880a9547dc0 ((work_completion)(&fqdir->destroy_work)){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2239
#2: ffffffff895a7d58 (rcu_state.barrier_mutex){+.+.}, at: rcu_barrier+0x47/0x350 kernel/rcu/tree.c:2926
1 lock held by khungtaskd/1091:
#0: ffffffff895a4080 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 kernel/locking/lockdep.c:5334
1 lock held by rsyslogd/8937:
#0: ffff8880a94db160 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
2 locks held by getty/9026:
#0: ffff8880a7a49090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f2d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9027:
#0: ffff888099417090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f552e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9028:
#0: ffff88808ffb1090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f512e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9029:
#0: ffff8880a7a4f090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f3d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9030:
#0: ffff8880a9971090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f4d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9031:
#0: ffff8880a5ea3090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f392e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9032:
#0: ffff888098e66090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f1d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
3 locks held by kworker/1:5/9703:
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2235
#1: ffff888063b47dc0 ((work_completion)(&fqdir->destroy_work)){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2239
#2: ffffffff895a7d58 (rcu_state.barrier_mutex){+.+.}, at: rcu_barrier+0x47/0x350 kernel/rcu/tree.c:2926
3 locks held by kworker/1:6/9704:
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2235
#1: ffff888063b27dc0 ((work_completion)(&fqdir->destroy_work)){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2239
#2: ffffffff895a7d58 (rcu_state.barrier_mutex){+.+.}, at: rcu_barrier+0x47/0x350 kernel/rcu/tree.c:2926
3 locks held by kworker/1:9/9972:
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8880aa427d28 ((wq_completion)events){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2235
#1: ffff88807416fdc0 ((work_completion)(&fqdir->destroy_work)){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2239
#2: ffffffff895a7d58 (rcu_state.barrier_mutex){+.+.}, at: rcu_barrier+0x47/0x350 kernel/rcu/tree.c:2926
2 locks held by kworker/u4:8/11804:
#0: ffff8880ae837398 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1215 [inline]
#0: ffff8880ae837398 (&rq->lock){-.-.}, at: __schedule+0x232/0x1f30 kernel/sched/core.c:4029
#1: ffffffff895a4080 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:435 [inline]
#1: ffffffff895a4080 (rcu_read_lock){....}, at: update_curr+0x2ea/0x8d0 kernel/sched/fair.c:859
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1091 Comm: khungtaskd Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x197/0x210 lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x23b/0x28b 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:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
watchdog+0xb11/0x10c0 kernel/hung_task.c:289
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8937 Comm: rsyslogd Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:hlock_class kernel/locking/lockdep.c:158 [inline]
RIP: 0010:mark_lock+0x77/0x1220 kernel/locking/lockdep.c:3643
Code: c5 09 45 85 e4 0f 84 c9 00 00 00 45 31 ff 48 83 c4 28 44 89 f8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 8d 46 20 41 89 d4 49 89 f5 <48> 89 c2 48 89 45 c8 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f
RSP: 0018:ffff88808e0ef7b8 EFLAGS: 00000046
RAX: ffff8880a1128f08 RBX: 0000000000000000 RCX: 0000000000040000
RDX: 0000000000000008 RSI: ffff8880a1128ee8 RDI: ffff8880a1128600
RBP: ffff88808e0ef808 R08: 0000000000000001 R09: 0000000000000150
R10: ffff8880a1128ee8 R11: ffff8880a1128600 R12: 0000000000000008
R13: ffff8880a1128ee8 R14: 0000000000000000 R15: 00000000000c0150
FS: 00007f26cf3f7700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000000a87d3000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:3592 [inline]
__lock_acquire+0x538/0x4a00 kernel/locking/lockdep.c:3909
lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4485
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:338 [inline]
__cache_free_alien mm/slab.c:765 [inline]
cache_free_alien mm/slab.c:794 [inline]
___cache_free+0x136/0x3a0 mm/slab.c:3449
qlink_free mm/kasan/quarantine.c:148 [inline]
qlist_free_all+0x85/0x150 mm/kasan/quarantine.c:167
quarantine_reduce+0x15e/0x1a0 mm/kasan/quarantine.c:260
__kasan_kmalloc.constprop.0+0xa3/0xe0 mm/kasan/common.c:491
kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:518
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc mm/slab.c:3319 [inline]
kmem_cache_alloc_trace+0x141/0x790 mm/slab.c:3548
kmalloc include/linux/slab.h:556 [inline]
syslog_print kernel/printk/printk.c:1356 [inline]
do_syslog kernel/printk/printk.c:1529 [inline]
do_syslog+0x5fa/0x1820 kernel/printk/printk.c:1503
kmsg_read+0x8f/0xc0 fs/proc/kmsg.c:40
proc_reg_read+0x1fc/0x2c0 fs/proc/inode.c:223
__vfs_read+0x8a/0x110 fs/read_write.c:425
vfs_read+0x1f0/0x440 fs/read_write.c:461
ksys_read+0x14f/0x290 fs/read_write.c:587
__do_sys_read fs/read_write.c:597 [inline]
__se_sys_read fs/read_write.c:595 [inline]
__x64_sys_read+0x73/0xb0 fs/read_write.c:595
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f26d1e571fd
Code: d1 20 00 00 75 10 b8 00 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e fa ff ff 48 89 04 24 b8 00 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 a7 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007f26cf3f6e30 EFLAGS: 00000293 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000e19170 RCX: 00007f26d1e571fd
RDX: 0000000000000fff RSI: 00007f26d0c2b5a0 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000e04260 R09: 0000000000000000
R10: 0000000000000012 R11: 0000000000000293 R12: 000000000065e420
R13: 00007f26cf3f79c0 R14: 00007f26d249c040 R15: 0000000000000003