INFO: task syz-executor.0:5531 blocked for more than 143 seconds.
Not tainted 6.5.0-rc7-syzkaller-00185-g28f20a19294d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26944 pid:5531 ppid:5378 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6710
schedule+0xe7/0x1b0 kernel/sched/core.c:6786
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x967/0x1340 kernel/locking/mutex.c:747
blkdev_put+0xb0/0x8e0 block/bdev.c:901
blkdev_release+0x82/0xa0 block/fops.c:533
__fput+0x3f7/0xac0 fs/file_table.c:384
task_work_run+0x14d/0x240 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:297
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f108187b8da
RSP: 002b:00007fff13ede870 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007f108187b8da
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f108199d980 R08: 0000001b2bc60000 R09: 0000000000000001
R10: 00007fff13f8a080 R11: 0000000000000293 R12: 0000000000011286
R13: ffffffffffffffff R14: 00007f1081400000 R15: 0000000000010f45
INFO: task syz-executor.0:5542 blocked for more than 143 seconds.
Not tainted 6.5.0-rc7-syzkaller-00185-g28f20a19294d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29096 pid:5542 ppid:5378 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6710
schedule+0xe7/0x1b0 kernel/sched/core.c:6786
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x967/0x1340 kernel/locking/mutex.c:747
blkdev_get_by_dev.part.0+0x4f0/0xb20 block/bdev.c:803
blkdev_get_by_dev+0x75/0x80 block/bdev.c:846
disk_scan_partitions+0x1e9/0x320 block/genhd.c:369
blkdev_common_ioctl+0x616/0x1c40 block/ioctl.c:546
blkdev_ioctl+0x249/0x770 block/ioctl.c:615
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+0x18f/0x210 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f108187c8d9
RSP: 002b:00007f10825ef0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f108199c050 RCX: 00007f108187c8d9
RDX: 0000000000000000 RSI: 000000000000125f RDI: 0000000000000003
RBP: 00007f10818d8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f108199c050 R15: 00007fff13ede7a8
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c9a67f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c9a64f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/28:
#0: ffffffff8c9a7400 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615
2 locks held by getty/4772:
#0: ffff88814aadd098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfcb/0x1480 drivers/tty/n_tty.c:2187
1 lock held by udevd/5373:
#0: ffff8881407ed4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4f0/0xb20 block/bdev.c:803
1 lock held by syz-executor.0/5531:
#0: ffff8881407ed4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xb0/0x8e0 block/bdev.c:901
1 lock held by syz-executor.0/5542:
#0: ffff8881407ed4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4f0/0xb20 block/bdev.c:803
1 lock held by syz-executor.0/5761:
#0: ffff8881407ed4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4f0/0xb20 block/bdev.c:803
1 lock held by syz-executor.0/5762:
#0: ffff8881407ed4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4f0/0xb20 block/bdev.c:803
1 lock held by syz-executor.0/5778:
#0: ffff8881407ed4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4f0/0xb20 block/bdev.c:803
1 lock held by syz-executor.0/5779:
#0: ffff8881407ed4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4f0/0xb20 block/bdev.c:803
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc7-syzkaller-00185-g28f20a19294d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2ac/0x310 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+0xf29/0x11b0 kernel/hung_task.c:379
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 41 Comm: kworker/u4:2 Not tainted 6.5.0-rc7-syzkaller-00185-g28f20a19294d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: 0x0 (events_unbound)
RIP: 0010:find_busiest_group+0x25d/0x8f0 kernel/sched/fair.c:10418
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b8 05 00 00 48 c7 43 30 00 00 00 00 45 31 f6 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 48 c7 45 20 00 00 00 00 48 8b 84
RSP: 0018:ffffc90000b27718 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: ffffc90000b279c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffc90000b279ec RDI: ffffc90000b27a14
RBP: 1ffff92000164ee6 R08: 0000000000000000 R09: fffffbfff1d574da
R10: ffffffff8eaba6d7 R11: 0000000000000000 R12: 0000000000000001
R13: ffff888014e4e800 R14: ffff888017645c80 R15: ffff888014e4e83c
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ff62c6b680 CR3: 000000000c776000 CR4: 0000000000350ef0
Call Trace:
load_balance+0x6bc/0x3160 kernel/sched/fair.c:10838
newidle_balance+0x710/0x1210 kernel/sched/fair.c:11891
pick_next_task_fair+0x87/0x11d0 kernel/sched/fair.c:8182
__pick_next_task kernel/sched/core.c:6013 [inline]
pick_next_task kernel/sched/core.c:6088 [inline]
__schedule+0x493/0x59f0 kernel/sched/core.c:6674
schedule+0xe7/0x1b0 kernel/sched/core.c:6786
worker_thread+0x17d/0x1110 kernel/workqueue.c:2772
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304