INFO: task syz.0.161:6407 blocked in I/O wait for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.161 state:D stack:24920 pid:6407 tgid:6405 ppid:5719 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x125c/0x6740 kernel/sched/core.c:7239
__schedule_loop kernel/sched/core.c:7316 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7331
io_schedule+0x8a/0xf0 kernel/sched/core.c:8159
folio_wait_bit_common+0x414/0xa70 mm/filemap.c:1329
folio_lock include/linux/pagemap.h:1157 [inline]
migrate_folio_unmap mm/migrate.c:1251 [inline]
migrate_pages_batch+0x7a1/0x45c0 mm/migrate.c:1908
migrate_pages_sync+0x4db/0x880 mm/migrate.c:2052
migrate_pages+0x1a83/0x2850 mm/migrate.c:2134
compact_zone+0x243c/0x4420 mm/compaction.c:2668
compact_node+0x17f/0x2c0 mm/compaction.c:2937
compact_nodes mm/compaction.c:2959 [inline]
sysctl_compaction_handler mm/compaction.c:3010 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:2997
proc_sys_call_handler+0x47f/0x5a0 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x830/0x10b0 fs/splice.c:736
do_splice_from fs/splice.c:936 [inline]
direct_splice_actor+0x192/0x690 fs/splice.c:1159
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
do_splice_direct_actor fs/splice.c:1202 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1228
do_sendfile+0xadc/0xe20 fs/read_write.c:1371
__do_sys_sendfile64 fs/read_write.c:1426 [inline]
__se_sys_sendfile64 fs/read_write.c:1418 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1418
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f60d199e0d9
RSP: 002b:00007f60d294d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f60d1c25fa0 RCX: 00007f60d199e0d9
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000005
RBP: 00007f60d1a35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f60d1c26038 R14: 00007f60d1c25fa0 R15: 00007ffe760f7688
Showing all locks held in the system:
locks held by khungtaskd/43: 1, last CPU#3:
#0: ffffffff8ede9640 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8ede9640 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8ede9640 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6793
locks held by kworker/u35:0/65: 2, on CPU#1:
#0: ffff88802968c140 ((wq_completion)nbd1-recv){+.+.}-{0:0}, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1: ffffc90000d37d08 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
locks held by kworker/2:2/849: 3, on CPU#2:
#0: ffff88806a63b6e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x140 kernel/sched/core.c:667
#1: ffff88806a624568 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:218 [inline]
#1: ffff88806a624568 (psi_seq){-.-.}-{0:0}, at: __schedule+0x2e8e/0x6740 kernel/sched/core.c:7233
#2: ffff88802c5e81d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#2: ffff88802c5e81d8 (&dev->mutex){....}-{4:4}, at: usb_remote_wakeup+0x23/0x100 drivers/usb/core/hub.c:3894
locks held by getty/5525: 2, on CPU#2:
#0: ffff88803537c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900000eb2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x14e0 drivers/tty/n_tty.c:2211
locks held by udevd/5724: 1, on CPU#3:
#0: ffff88802969b350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe40 block/bdev.c:991
locks held by kworker/u35:1/6032: 2, on CPU#3:
#0: ffff88802968c140 ((wq_completion)nbd1-recv){+.+.}-{0:0}, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1: ffffc900053b7d08 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
locks held by syz.0.161/6407: 1, on CPU#0:
#0: ffff888059d58460 (sb_writers#3){.+.+}-{0:0}, at: splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
locks held by syz.4.1002/9713: 1, last CPU#2:
#0: ffff88806a63b6e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x140 kernel/sched/core.c:667
locks held by syz.5.1313/10863: 1, on CPU#0:
#0: ffff88802969b350 (&disk->open_mutex){+.+.}-{4:4}, at: sync_bdevs+0x153/0x480 block/bdev.c:1370
locks held by kworker/2:6/11435: 3, last CPU#2:
#0: ffff88801c0aa940 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
#1: ffffc900035a7d08 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
#2: ffff88803e1b8250 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1b8/0x6330 drivers/net/netdevsim/fib.c:1490
locks held by syz.9.1804/12517: 2, on CPU#0:
#0: ffff88802700cea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0xb0 net/bluetooth/hci_core.c:497
#1: ffffffff8edf50e8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x27f/0x3c0 kernel/rcu/tree_exp.h:311
locks held by syz.3.1875/12833: 1, on CPU#0:
#0: ffffffff8edf4fb8 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x48/0x6d0 kernel/rcu/tree.c:3857
=============================================
NMI backtrace for cpu 3
CPU: 3 UID: 0 PID: 43 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x21f/0x2a0 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xcb1/0x1030 kernel/hung_task.c:561
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 3 to CPUs 0,2:
NMI backtrace for cpu 2
CPU: 2 UID: 0 PID: 9713 Comm: syz.4.1002 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x6a/0xc0 kernel/rcu/tree.c:752
Code: 02 00 75 5d 48 03 1c ed 20 09 67 8e 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 <38> d0 7c 04 84 d2 75 25 8b 03 c1 e8 02 83 e0 01 65 48 ff 0d e6 64
RSP: 0018:ffffc900027b7580 EFLAGS: 00000206
RAX: 0000000000000003 RBX: ffff88806a633c68 RCX: ffffffff91eb6601
RDX: 0000000000000000 RSI: ffffffff8c602300 RDI: ffffffff8e670930
RBP: 0000000000000002 R08: ffffffff91eb66f0 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000010ab0 R12: ffffc900027b7658
R13: ffffc900027b7608 R14: ffffc900027b7a78 R15: ffffc900027b763c
FS: 0000000000000000(0000) GS:ffff8880d5dd1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556d82e85168 CR3: 00000000340ea000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 08c5d32ffc85c5bc
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
class_rcu_destructor include/linux/rcupdate.h:1183 [inline]
unwind_next_frame+0x745/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x162/0x1e0 mm/page_owner.c:165
__reset_page_owner+0x84/0x190 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1406 [inline]
free_pages_prepare+0x586/0xd80 mm/page_alloc.c:1451
__free_contig_range_common+0x14f/0x250 mm/page_alloc.c:6897
__free_contig_range mm/page_alloc.c:6942 [inline]
free_pages_bulk+0x12a/0x200 mm/page_alloc.c:5257
vm_area_free_pages+0xad/0x2b0 mm/vmalloc.c:3461
vfree mm/vmalloc.c:3510 [inline]
vfree+0x108/0x730 mm/vmalloc.c:3484
kcov_put kernel/kcov.c:447 [inline]
kcov_put kernel/kcov.c:443 [inline]
kcov_close+0x34/0x60 kernel/kcov.c:554
__fput+0x3ff/0xb50 fs/file_table.c:512
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x951/0x2ae0 kernel/exit.c:1009
do_group_exit+0xd5/0x2a0 kernel/exit.c:1152
get_signal+0x1ec7/0x21e0 kernel/signal.c:3046
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x139/0x700 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
do_syscall_64+0x661/0x790 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa32215e90e
Code: Unable to access opcode bytes at 0x7fa32215e8e4.
RSP: 002b:00007fa322f8bf58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007fa322f8c6c0 RCX: 00007fa32215e90e
RDX: 00007fa322f8bfb0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa322235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa322426038 R14: 00007fa322425fa0 R15: 00007ffcd10d4298
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 12783 Comm: syz.3.1863 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:55 [inline]
RIP: 0010:stack_access_ok+0x48/0x1d0 arch/x86/kernel/unwind_orc.c:409
Code: 89 fb 48 83 ec 08 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 3f 01 00 00 8b 13 85 d2 74 65 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 08 <48> 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 24 01 00 00 48 8d 7b 10 4c
RSP: 0018:ffffc9000ef0f568 EFLAGS: 00000202
RAX: dffffc0000000000 RBX: ffffc9000ef0f608 RCX: ffffffff91f2033a
RDX: 0000000000000001 RSI: ffffc9000ef0f9b8 RDI: ffffc9000ef0f610
RBP: ffffc9000ef0f9b8 R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000016817 R12: 0000000000000008
R13: ffffc9000ef0f608 R14: ffffc9000ef0f9e8 R15: ffffc9000ef0f63c
FS: 0000000000000000(0000) GS:ffff8880d5bd1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556d71440660 CR3: 000000000eb94000 CR4: 0000000000352ef0
DR0: 0000000000000001 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
deref_stack_reg arch/x86/kernel/unwind_orc.c:419 [inline]
unwind_next_frame+0x1551/0x2090 arch/x86/kernel/unwind_orc.c:677
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x162/0x1e0 mm/page_owner.c:165
__reset_page_owner+0x84/0x190 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1406 [inline]
free_pages_prepare+0x586/0xd80 mm/page_alloc.c:1451
__free_contig_range_common+0x14f/0x250 mm/page_alloc.c:6897
__free_contig_range mm/page_alloc.c:6942 [inline]
free_pages_bulk+0x12a/0x200 mm/page_alloc.c:5257
vm_area_free_pages+0xad/0x2b0 mm/vmalloc.c:3461
vfree mm/vmalloc.c:3510 [inline]
vfree+0x108/0x730 mm/vmalloc.c:3484
kcov_put kernel/kcov.c:447 [inline]
kcov_put kernel/kcov.c:443 [inline]
kcov_close+0x34/0x60 kernel/kcov.c:554
__fput+0x3ff/0xb50 fs/file_table.c:512
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x951/0x2ae0 kernel/exit.c:1009
do_group_exit+0xd5/0x2a0 kernel/exit.c:1152
get_signal+0x1ec7/0x21e0 kernel/signal.c:3046
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x139/0x700 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
do_syscall_64+0x661/0x790 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa3c4b5e90e
Code: Unable to access opcode bytes at 0x7fa3c4b5e8e4.
RSP: 002b:00007fa3c2dd4f58 EFLAGS: 00000346 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007fa3c2dd56c0 RCX: 00007fa3c4b5e90e
RDX: 00007fa3c2dd4fb0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa3c4c35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa3c4e26128 R14: 00007fa3c4e26090 R15: 00007fffb7b5d438