INFO: task syz.3.28:3858 blocked for more than 144 seconds.
Not tainted 6.1.104-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.28 state:D stack:23736 pid:3858 ppid:3644 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
blkdev_put+0x100/0x750 block/bdev.c:913
blkdev_close+0x56/0x80 block/fops.c:514
__fput+0x3f6/0x8d0 fs/file_table.c:320
task_work_run+0x246/0x300 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1cfb5799f9
RSP: 002b:00007ffd114a3ee8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f1cfb717a80 RCX: 00007f1cfb5799f9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f1cfb717a80 R08: 0000000000000006 R09: 00007ffd114a41cf
R10: 00000000003fd86c R11: 0000000000000246 R12: 0000000000011691
R13: 00007ffd114a3fe0 R14: 00007ffd114a4000 R15: ffffffffffffffff
INFO: task syz.3.28:3864 blocked for more than 145 seconds.
Not tainted 6.1.104-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.28 state:D stack:26464 pid:3864 ppid:3644 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
blkdev_put+0x100/0x750 block/bdev.c:913
blkdev_close+0x56/0x80 block/fops.c:514
__fput+0x3f6/0x8d0 fs/file_table.c:320
task_work_run+0x246/0x300 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1cfb5799f9
RSP: 002b:00007f1cfc3aa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f1cfb716058 RCX: 00007f1cfb5799f9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005
RBP: 00007f1cfb5e78ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1cfb716058 R15: 00007ffd114a3d88
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32b190 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32b990 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/27:
#0: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
2 locks held by getty/3389:
#0: ffff888029231098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2198
1 lock held by udevd/3629:
#0: ffff88801fb924c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x148/0xa10 block/bdev.c:815
1 lock held by syz.3.28/3858:
#0: ffff88801fb924c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x100/0x750 block/bdev.c:913
1 lock held by syz.3.28/3864:
#0: ffff88801fb924c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x100/0x750 block/bdev.c:913
1 lock held by syz.4.526/5680:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.1.104-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5680 Comm: syz.4.526 Not tainted 6.1.104-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__wrmsr arch/x86/include/asm/msr.h:94 [inline]
RIP: 0010:native_apic_msr_eoi_write+0x5/0x10 arch/x86/include/asm/apic.h:211
Code: d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 c2 8f a6 00 48 8b 03 bf f0 03 00 00 44 89 f6 5b 41 5e 5d ff e0 90 b9 0b 08 00 00 <31> c0 31 d2 0f 30 c3 0f 1f 40 00 81 ff cf 00 00 00 7f 0c 83 ff 20
RSP: 0018:ffffc900001e0f40 EFLAGS: 00000046
RAX: ffffffff813b8b80 RBX: ffff888144efc840 RCX: 000000000000080b
RDX: 0000000080010001 RSI: 0000000000000000 RDI: 00000000000000b0
RBP: ffffffff8d1973e8 R08: ffffffff81704201 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff110289df90f R14: ffff888144efc870 R15: ffff888144efc800
FS: 00007fa9103c46c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020200000 CR3: 000000007b6c3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
handle_edge_irq+0x1eb/0xbf0 kernel/irq/chip.c:800
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:231 [inline]
__common_interrupt+0xd7/0x1f0 arch/x86/kernel/irq.c:250
common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:644
RIP: 0010:__outw arch/x86/include/asm/shared/io.h:23 [inline]
RIP: 0010:iowrite16+0x33/0x80 lib/iomap.c:213
Code: e1 4d fd 48 81 fb 00 00 04 00 72 0a e8 66 e1 4d fd 66 89 2b eb 55 48 81 fb 01 00 01 00 72 0d e8 53 e1 4d fd 89 e8 89 da 66 ef 3f 8b 2d 65 b5 5c 09 31 ff 89 ee e8 9c e4 4d fd 85 ed 74 27 e8
RSP: 0018:ffffc900034578e8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 000000000001c0b0 RCX: 0000000000040000
RDX: 000000000001c0b0 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 0000000000000000 R08: ffffffff849e012b R09: ffff88814330b598
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 00000000000016a2 R14: dffffc0000000000 R15: ffff888144a4e200
vp_notify+0x53/0x70 drivers/virtio/virtio_pci_common.c:45
virtqueue_notify drivers/virtio/virtio_ring.c:2255 [inline]
virtqueue_kick+0x3a3/0x5c0 drivers/virtio/virtio_ring.c:2278
request_entropy drivers/char/hw_random/virtio-rng.c:63 [inline]
copy_data+0x233/0x360 drivers/char/hw_random/virtio-rng.c:74
virtio_read+0xc7/0x200 drivers/char/hw_random/virtio-rng.c:92
rng_get_data drivers/char/hw_random/core.c:201 [inline]
rng_dev_read+0x23b/0x6b0 drivers/char/hw_random/core.c:239
do_iter_read+0x500/0xc80 fs/read_write.c:798
vfs_readv fs/read_write.c:916 [inline]
do_preadv+0x20e/0x350 fs/read_write.c:1008
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa90f5799f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa9103c4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007fa90f715f80 RCX: 00007fa90f5799f9
RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000005
RBP: 00007fa90f5e78ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa90f715f80 R15: 00007ffd195526e8