INFO: task syz-executor.0:5436 blocked for more than 143 seconds.
Not tainted 6.7.0-rc1-next-20231115-syzkaller-01493-gbc962b35b139 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27184 pid:5436 tgid:5435 ppid:5416 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xede/0x5b00 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6778
schedule_timeout+0x254/0x290 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3da/0x5f0 kernel/sched/completion.c:116
__flush_workqueue+0x3e0/0x1340 kernel/workqueue.c:3201
nbd_start_device_ioctl drivers/block/nbd.c:1425 [inline]
__nbd_ioctl drivers/block/nbd.c:1486 [inline]
nbd_ioctl+0x308/0xd60 drivers/block/nbd.c:1526
blkdev_ioctl+0x2f9/0x770 block/ioctl.c:633
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7f2a716780e9
RSP: 002b:00007f2a728910d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2a7177bf60 RCX: 00007f2a716780e9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f2a716d2c9b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f2a7177bf60 R15: 00007ffdde84e308
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4822:
#0: ffff8880267720a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015c72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc4/0x1490 drivers/tty/n_tty.c:2201
2 locks held by kworker/u5:2/5066:
#0: ffff88801e10cd38 ((wq_completion)nbd0-recv){+.+.}-{0:0}, at: process_one_work+0x78c/0x15f0 kernel/workqueue.c:2611
#1: ffffc9000460fd80 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x7f6/0x15f0 kernel/workqueue.c:2612
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.7.0-rc1-next-20231115-syzkaller-01493-gbc962b35b139 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf86/0x1210 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12 Comm: kworker/u4:1 Not tainted 6.7.0-rc1-next-20231115-syzkaller-01493-gbc962b35b139 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:inat_get_escape_attribute+0x84/0x1b0 arch/x86/lib/inat.c:37
Code: 84 f5 00 00 00 e8 4c 60 12 f7 45 0f b6 ed 48 b8 00 00 00 00 00 fc ff df 49 c1 e5 02 4c 01 ed 48 89 ea 48 c1 ea 03 0f b6 14 02 <48> 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 cd 00 00 00 8b
RSP: 0018:ffffc90000117858 EFLAGS: 00000a03
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff8a76119b
RDX: 0000000000000000 RSI: ffffffff8a75ac84 RDI: ffffffff8c1969a0
RBP: ffffffff8c19c0fc R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000004 R12: 0000000000000000
R13: 000000000000007c R14: 000000000000001f R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556099ac3680 CR3: 000000000cd78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
insn_get_opcode+0x578/0xa30 arch/x86/lib/insn.c:305
insn_get_modrm+0x30e/0x730 arch/x86/lib/insn.c:343
insn_get_sib+0x1ad/0x320 arch/x86/lib/insn.c:421
insn_get_displacement+0x23a/0x680 arch/x86/lib/insn.c:464
insn_get_immediate+0x550/0x1c50 arch/x86/lib/insn.c:632
insn_get_length arch/x86/lib/insn.c:707 [inline]
insn_decode+0x2ae/0x340 arch/x86/lib/insn.c:747
text_poke_loc_init+0xdf/0x5e0 arch/x86/kernel/alternative.c:2322
arch_jump_label_transform_queue+0xaf/0x110 arch/x86/kernel/jump_label.c:138
__jump_label_update+0x125/0x420 kernel/jump_label.c:475
jump_label_update+0x1d7/0x400 kernel/jump_label.c:829
static_key_disable_cpuslocked+0x154/0x1c0 kernel/jump_label.c:235
static_key_disable+0x1a/0x20 kernel/jump_label.c:243
toggle_allocation_gate mm/kfence/core.c:835 [inline]
toggle_allocation_gate+0x13f/0x250 mm/kfence/core.c:822
process_one_work+0x8a4/0x15f0 kernel/workqueue.c:2636
process_scheduled_works kernel/workqueue.c:2709 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2790
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242