INFO: task syz-executor377:3648 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-executor377 state:D stack:28456 pid:3648 ppid:3635 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: 0033:0x7fd0786ecee9
RSP: 002b:00007fd07869a308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd078770408 RCX: 00007fd0786ecee9
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007fd078770400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd07877040c
R13: 00007fd07873e074 R14: 64626e2f7665642f R15: 0000000000022000
INFO: task syz-executor377:3649 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-executor377 state:D stack:29536 pid:3649 ppid:3635 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
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
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: 0033:0x7fd0786ecee9
RSP: 002b:00007fd078679308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd078770418 RCX: 00007fd0786ecee9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007fd078770410 R08: 00007fd078679700 R09: 0000000000000000
R10: 00007fd078679700 R11: 0000000000000246 R12: 00007fd07877041c
R13: 00007fd07873e074 R14: 64626e2f7665642f R15: 0000000000022000
INFO: task syz-executor377:3650 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-executor377 state:D stack:29400 pid:3650 ppid:3635 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
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
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: 0033:0x7fd0786ecee9
RSP: 002b:00007fd078658308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd078770428 RCX: 00007fd0786ecee9
RDX: 0000000000000009 RSI: 000000000000ab07 RDI: 0000000000000003
RBP: 00007fd078770420 R08: 00007fd078658700 R09: 0000000000000000
R10: 00007fd078658700 R11: 0000000000000246 R12: 00007fd07877042c
R13: 00007fd07873e074 R14: 64626e2f7665642f R15: 0000000000022000
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:getty state:S stack:23392 pid:3284 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: 0033:0x7fb6823a28fe
RSP: 002b:00007fff468ad668 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055ad72af9910 RCX: 00007fb6823a28fe
RDX: 0000000000000001 RSI: 00007fff468ad680 RDI: 0000000000000000
RBP: 000055ad72af9970 R08: 0000000000000007 R09: 000055ad72afacd0
R10: 0000000000000063 R11: 0000000000000246 R12: 000055ad72af99ac
R13: 00007fff468ad680 R14: 0000000000000000 R15: 000055ad72af99ac
2 locks held by getty/3284:
#0: ffff88814a803098 (&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-executor377 state:D stack:28456 pid:3648 ppid:3635 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: 0033:0x7fd0786ecee9
RSP: 002b:00007fd07869a308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd078770408 RCX: 00007fd0786ecee9
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007fd078770400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd07877040c
R13: 00007fd07873e074 R14: 64626e2f7665642f R15: 0000000000022000
1 lock held by syz-executor377/3648:
#0: ffff88801e11c198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
task:syz-executor377 state:D stack:29536 pid:3649 ppid:3635 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
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
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: 0033:0x7fd0786ecee9
RSP: 002b:00007fd078679308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd078770418 RCX: 00007fd0786ecee9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007fd078770410 R08: 00007fd078679700 R09: 0000000000000000
R10: 00007fd078679700 R11: 0000000000000246 R12: 00007fd07877041c
R13: 00007fd07873e074 R14: 64626e2f7665642f R15: 0000000000022000
1 lock held by syz-executor377/3649:
#0: ffff88801e11c198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
task:syz-executor377 state:D stack:29400 pid:3650 ppid:3635 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
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
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: 0033:0x7fd0786ecee9
RSP: 002b:00007fd078658308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd078770428 RCX: 00007fd0786ecee9
RDX: 0000000000000009 RSI: 000000000000ab07 RDI: 0000000000000003
RBP: 00007fd078770420 R08: 00007fd078658700 R09: 0000000000000000
R10: 00007fd078658700 R11: 0000000000000246 R12: 00007fd07877042c
R13: 00007fd07873e074 R14: 64626e2f7665642f R15: 0000000000022000
1 lock held by syz-executor377/3650:
#0: ffff88801e11c198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
=============================================
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
CPU: 0 PID: 41 Comm: kworker/u4:2 Not tainted 5.19.0-next-20220809-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__insn_get_emulate_prefix arch/x86/lib/insn.c:90 [inline]
RIP: 0010:insn_get_emulate_prefix arch/x86/lib/insn.c:106 [inline]
RIP: 0010:insn_get_prefixes.part.0+0x134/0x1200 arch/x86/lib/insn.c:134
Code: 49 83 fc 05 0f 84 30 08 00 00 e8 97 6a 56 fd 49 83 c4 01 49 89 ed 48 83 c5 01 48 39 6c 24 10 0f 83 6b ff ff ff 48 8b 44 24 08 <31> db 48 bd 00 00 00 00 00 fc ff df 4c 8d 60 01 e8 67 6a 56 fd 49
RSP: 0018:ffffc90000b278f0 EFLAGS: 00000292
RAX: ffffffff81c7e8c3 RBX: ffffffff8a4d29e0 RCX: ffffffff84259b3f
RDX: ffff888012610000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff81c7e8c4 R08: 0000000000000000 R09: 00000000000000e9
R10: 000000000000000f R11: 0000000000000000 R12: 0000000000000001
R13: 00000000000000e9 R14: dffffc0000000000 R15: 000000000000000f
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005573efa80600 CR3: 000000000bc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
insn_get_prefixes arch/x86/lib/insn.c:131 [inline]
insn_get_opcode arch/x86/lib/insn.c:272 [inline]
insn_get_modrm+0x646/0x7c0 arch/x86/lib/insn.c:343
insn_get_sib+0x29c/0x330 arch/x86/lib/insn.c:421
insn_get_displacement+0x346/0x6c0 arch/x86/lib/insn.c:464
insn_get_immediate arch/x86/lib/insn.c:632 [inline]
insn_get_length arch/x86/lib/insn.c:707 [inline]
insn_decode+0x35b/0x3b0 arch/x86/lib/insn.c:747
arch_jump_entry_size+0xa0/0x110 arch/x86/kernel/jump_label.c:24
__jump_label_patch+0x80/0x330 arch/x86/kernel/jump_label.c:45
arch_jump_label_transform_queue+0x63/0x100 arch/x86/kernel/jump_label.c:137
__jump_label_update+0x12e/0x410 kernel/jump_label.c:447
jump_label_update+0x32f/0x410 kernel/jump_label.c:801
static_key_disable_cpuslocked+0x152/0x1b0 kernel/jump_label.c:207
static_key_disable+0x16/0x20 kernel/jump_label.c:215
toggle_allocation_gate mm/kfence/core.c:825 [inline]
toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:803
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
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.130 msecs