INFO: task syz-executor.5:22839 blocked for more than 143 seconds. Not tainted 6.4.0-rc7-next-20230623-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28456 pid:22839 ppid:5072 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0xc9a/0x5880 kernel/sched/core.c:6710 schedule+0xde/0x1a0 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+0xa3b/0x1350 kernel/locking/mutex.c:747 blkdev_get_by_dev.part.0+0x4ff/0xb50 block/bdev.c:803 blkdev_get_by_dev+0x79/0x80 block/bdev.c:846 disk_scan_partitions+0x1e9/0x320 block/genhd.c:369 blkdev_common_ioctl+0x605/0x1be0 block/ioctl.c:546 blkdev_ioctl+0x24f/0x760 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+0x19d/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f455968c389 RSP: 002b:00007f455a48c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f45597abf80 RCX: 00007f455968c389 RDX: 0000000000000000 RSI: 000000000000125f RDI: 0000000000000003 RBP: 00007f45596d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff527cb82f R14: 00007f455a48c300 R15: 0000000000022000 INFO: task syz-executor.5:22845 blocked for more than 143 seconds. Not tainted 6.4.0-rc7-next-20230623-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28456 pid:22845 ppid:5072 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0xc9a/0x5880 kernel/sched/core.c:6710 schedule+0xde/0x1a0 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+0xa3b/0x1350 kernel/locking/mutex.c:747 blkdev_put+0xb0/0x8a0 block/bdev.c:901 blkdev_release+0x82/0xa0 block/fops.c:532 __fput+0x40c/0xad0 fs/file_table.c:378 task_work_run+0x16f/0x270 kernel/task_work.c:179 get_signal+0x1c7/0x25f0 kernel/signal.c:2653 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f455968c389 RSP: 002b:00007f455a46b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007f45597ac050 RCX: 00007f455968c389 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006 RBP: 00007f45596d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff527cb82f R14: 00007f455a46b300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8c9a2170 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522 1 lock held by rcu_tasks_trace/14: #0: ffffffff8c9a1e70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522 1 lock held by khungtaskd/28: #0: ffffffff8c9a2d80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615 4 locks held by klogd/4469: #0: ffff8880b983c418 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:558 #1: ffff8880b9828848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2de/0x950 kernel/sched/psi.c:995 #2: ffff88807fd30a00 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xab/0x1df0 kernel/sched/core.c:4229 #3: ffff8880b983c418 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:558 2 locks held by getty/4781: #0: ffff888028f3d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xf08/0x13f0 drivers/tty/n_tty.c:2187 1 lock held by udevd/5611: #0: ffff8880205b04c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4ff/0xb50 block/bdev.c:803 2 locks held by kworker/u4:25/10595: 1 lock held by syz-executor.5/22839: #0: ffff8880205b04c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4ff/0xb50 block/bdev.c:803 1 lock held by syz-executor.5/22845: #0: ffff8880205b04c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xb0/0x8a0 block/bdev.c:901 1 lock held by syz-executor.5/22907: #0: ffff8880205b04c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4ff/0xb50 block/bdev.c:803 1 lock held by syz-executor.5/22908: #0: ffff8880205b04c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4ff/0xb50 block/bdev.c:803 1 lock held by syz-executor.5/22955: #0: ffff8880205b04c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4ff/0xb50 block/bdev.c:803 1 lock held by syz-executor.5/22956: #0: ffff8880205b04c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x4ff/0xb50 block/bdev.c:803 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc7-next-20230623-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x2a4/0x300 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+0xe16/0x1090 kernel/hung_task.c:379 kthread+0x344/0x440 kernel/kthread.c:389 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0