INFO: task syz-executor761:3653 blocked for more than 143 seconds.
Not tainted 5.19.0-next-20220809-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor761 state:D stack:28120 pid:3653 ppid:3643 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:180
nbd_add_socket+0x166/0x810 drivers/block/nbd.c:1123
__nbd_ioctl drivers/block/nbd.c:1464 [inline]
nbd_ioctl+0x4ab/0xbd0 drivers/block/nbd.c:1521
blkdev_ioctl+0x36e/0x800 block/ioctl.c:614
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6896bde399
RSP: 002b:00007ffccaf309f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000000779bf RCX: 00007f6896bde399
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffccaf30b98 R09: 00007ffccaf30b98
R10: 00007ffccaf30b98 R11: 0000000000000246 R12: 00007ffccaf30a0c
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
INFO: task udevd:3654 blocked for more than 143 seconds.
Not tainted 5.19.0-next-20220809-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:27648 pid:3654 ppid:2973 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
io_schedule+0xba/0x130 kernel/sched/core.c:8714
folio_wait_bit_common+0x3dd/0xa90 mm/filemap.c:1298
folio_put_wait_locked mm/filemap.c:1472 [inline]
do_read_cache_folio+0x2c0/0x510 mm/filemap.c:3501
read_mapping_folio include/linux/pagemap.h:762 [inline]
read_part_sector+0xf6/0x440 block/partitions/core.c:714
adfspart_check_ICS+0x9a/0x890 block/partitions/acorn.c:360
check_partition block/partitions/core.c:146 [inline]
blk_add_partitions block/partitions/core.c:599 [inline]
bdev_disk_changed block/partitions/core.c:685 [inline]
bdev_disk_changed+0x629/0xf60 block/partitions/core.c:652
blkdev_get_whole+0x18a/0x2d0 block/bdev.c:684
blkdev_get_by_dev.part.0+0x5ec/0xb90 block/bdev.c:821
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:855
blkdev_open+0x13c/0x2c0 block/fops.c:485
do_dentry_open+0x4a4/0x13a0 fs/open.c:878
do_open fs/namei.c:3557 [inline]
path_openat+0x1c92/0x28f0 fs/namei.c:3691
do_filp_open+0x1b6/0x400 fs/namei.c:3718
do_sys_openat2+0x16d/0x4c0 fs/open.c:1311
do_sys_open fs/open.c:1327 [inline]
__do_sys_openat fs/open.c:1343 [inline]
__se_sys_openat fs/open.c:1338 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1338
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f29ae588697
RSP: 002b:00007ffe179b0ff0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055fc54dafbd0 RCX: 00007f29ae588697
RDX: 00000000000a0800 RSI: 000055fc54db7ed0 RDI: 00000000ffffff9c
RBP: 000055fc54db7ed0 R08: 0000000000000001 R09: 00007ffe179e6080
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055fc54dbf790 R14: 00007ffe179b109c R15: 000055fc54da5910
Showing all threads with locks held in the system:
task:rcu_tasks_kthre state:I stack:29000 pid:12 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
rcu_tasks_one_gp+0x3e5/0xc70 kernel/rcu/tasks.h:514
rcu_tasks_kthread+0x73/0xa0 kernel/rcu/tasks.h:552
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bf889b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
task:rcu_tasks_trace state:I stack:29120 pid:13 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
rcu_tasks_one_gp+0x3e5/0xc70 kernel/rcu/tasks.h:514
rcu_tasks_kthread+0x73/0xa0 kernel/rcu/tasks.h:552
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bf886b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
task:kworker/0:1 state:D stack:26168 pid:14 ppid:2 flags:0x00004000
Workqueue: rcu_gp wait_rcu_exp_gp
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:571 [inline]
synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:622 [inline]
rcu_exp_wait_wake+0x28f/0xf80 kernel/rcu/tree_exp.h:688
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
2 locks held by kworker/0:1/14:
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888011866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90000137da8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
task:getty state:S stack:23392 pid:3288 ppid:1 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
wait_woken+0x18b/0x1f0 kernel/sched/wait.c:459
n_tty_read+0x1051/0x13e0 drivers/tty/n_tty.c:2243
iterate_tty_read drivers/tty/tty_io.c:858 [inline]
tty_read+0x33a/0x5d0 drivers/tty/tty_io.c:933
call_read_iter include/linux/fs.h:2186 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x67d/0x930 fs/read_write.c:470
ksys_read+0x127/0x250 fs/read_write.c:607
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff9806488fe
RSP: 002b:00007fff449159b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055be5b4f2910 RCX: 00007ff9806488fe
RDX: 0000000000000001 RSI: 00007fff449159d0 RDI: 0000000000000000
RBP: 000055be5b4f2970 R08: 0000000000000007 R09: 000055be5b4f3cd0
R10: 0000000000000063 R11: 0000000000000246 R12: 000055be5b4f29ac
R13: 00007fff449159d0 R14: 0000000000000000 R15: 000055be5b4f29ac
2 locks held by getty/3288:
#0: ffff8880264b3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177
task:syz-executor761 state:D stack:28120 pid:3653 ppid:3643 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:180
nbd_add_socket+0x166/0x810 drivers/block/nbd.c:1123
__nbd_ioctl drivers/block/nbd.c:1464 [inline]
nbd_ioctl+0x4ab/0xbd0 drivers/block/nbd.c:1521
blkdev_ioctl+0x36e/0x800 block/ioctl.c:614
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6896bde399
RSP: 002b:00007ffccaf309f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000000779bf RCX: 00007f6896bde399
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffccaf30b98 R09: 00007ffccaf30b98
R10: 00007ffccaf30b98 R11: 0000000000000246 R12: 00007ffccaf30a0c
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
1 lock held by syz-executor761/3653:
#0: ffff888147530198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
task:udevd state:D stack:27648 pid:3654 ppid:2973 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
io_schedule+0xba/0x130 kernel/sched/core.c:8714
folio_wait_bit_common+0x3dd/0xa90 mm/filemap.c:1298
folio_put_wait_locked mm/filemap.c:1472 [inline]
do_read_cache_folio+0x2c0/0x510 mm/filemap.c:3501
read_mapping_folio include/linux/pagemap.h:762 [inline]
read_part_sector+0xf6/0x440 block/partitions/core.c:714
adfspart_check_ICS+0x9a/0x890 block/partitions/acorn.c:360
check_partition block/partitions/core.c:146 [inline]
blk_add_partitions block/partitions/core.c:599 [inline]
bdev_disk_changed block/partitions/core.c:685 [inline]
bdev_disk_changed+0x629/0xf60 block/partitions/core.c:652
blkdev_get_whole+0x18a/0x2d0 block/bdev.c:684
blkdev_get_by_dev.part.0+0x5ec/0xb90 block/bdev.c:821
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:855
blkdev_open+0x13c/0x2c0 block/fops.c:485
do_dentry_open+0x4a4/0x13a0 fs/open.c:878
do_open fs/namei.c:3557 [inline]
path_openat+0x1c92/0x28f0 fs/namei.c:3691
do_filp_open+0x1b6/0x400 fs/namei.c:3718
do_sys_openat2+0x16d/0x4c0 fs/open.c:1311
do_sys_open fs/open.c:1327 [inline]
__do_sys_openat fs/open.c:1343 [inline]
__se_sys_openat fs/open.c:1338 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1338
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f29ae588697
RSP: 002b:00007ffe179b0ff0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055fc54dafbd0 RCX: 00007f29ae588697
RDX: 00000000000a0800 RSI: 000055fc54db7ed0 RDI: 00000000ffffff9c
RBP: 000055fc54db7ed0 R08: 0000000000000001 R09: 00007ffe179e6080
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055fc54dbf790 R14: 00007ffe179b109c R15: 000055fc54da5910
1 lock held by udevd/3654:
#0: ffff88801eb824c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb90 block/bdev.c:812
task:dhcpcd state:D stack:28856 pid:3666 ppid:3186 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
synchronize_rcu_expedited+0x39a/0x670 kernel/rcu/tree_exp.h:955
synchronize_rcu+0x2c3/0x370 kernel/rcu/tree.c:3519
synchronize_net+0x4a/0x50 net/core/dev.c:10766
__unregister_prot_hook+0x48a/0x5a0 net/packet/af_packet.c:382
packet_do_bind+0x8bc/0xdc0 net/packet/af_packet.c:3227
packet_bind+0x152/0x1b0 net/packet/af_packet.c:3311
__sys_bind+0x1e9/0x250 net/socket.c:1776
__do_sys_bind net/socket.c:1787 [inline]
__se_sys_bind net/socket.c:1785 [inline]
__x64_sys_bind+0x6f/0xb0 net/socket.c:1785
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5333561ce7
RSP: 002b:00007ffdc760c698 EFLAGS: 00000217 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 00005576b9cefb60 RCX: 00007f5333561ce7
RDX: 0000000000000014 RSI: 00007ffdc760c6a8 RDI: 0000000000000005
RBP: 0000000000000000 R08: 00005576bbcd79d0 R09: 00007f5333622a60
R10: 0000000000020000 R11: 0000000000000217 R12: 00005576bbcd6240
R13: 00005576bbcd78b8 R14: 00007ffdc762cf7c R15: 00007ffdc762cfa4
2 locks held by dhcpcd/3666:
#0: ffff888073ab0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1659 [inline]
#0: ffff888073ab0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
#1: ffffffff8bf941b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#1: ffffffff8bf941b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x562/0x670 kernel/rcu/tree_exp.h:940
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-next-20220809-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:227 [inline]
watchdog+0xcf7/0xfd0 kernel/hung_task.c:384
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x6f/0xb0 drivers/acpi/processor_idle.c:112