INFO: task systemd-udevd:18641 blocked for more than 143 seconds. Not tainted 5.13.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26408 pid:18641 ppid: 4857 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 io_schedule+0xba/0x130 kernel/sched/core.c:7215 wait_on_page_bit_common+0x571/0xe90 mm/filemap.c:1301 wait_on_page_bit mm/filemap.c:1362 [inline] wait_on_page_locked include/linux/pagemap.h:688 [inline] wait_on_page_read mm/filemap.c:3312 [inline] do_read_cache_page+0x95c/0x1390 mm/filemap.c:3355 read_mapping_page include/linux/pagemap.h:515 [inline] read_part_sector+0x146/0x620 block/partitions/core.c:672 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:148 [inline] blk_add_partitions+0x585/0xe00 block/partitions/core.c:609 bdev_disk_changed+0x244/0x4d0 fs/block_dev.c:1271 __blkdev_get+0x86c/0xa30 fs/block_dev.c:1353 blkdev_get_by_dev fs/block_dev.c:1453 [inline] blkdev_get_by_dev+0x200/0x660 fs/block_dev.c:1425 blkdev_open+0x154/0x2b0 fs/block_dev.c:1548 do_dentry_open+0x4b9/0x11b0 fs/open.c:826 do_open fs/namei.c:3361 [inline] path_openat+0x1c0e/0x27e0 fs/namei.c:3494 do_filp_open+0x190/0x3d0 fs/namei.c:3521 do_sys_openat2+0x16d/0x420 fs/open.c:1187 do_sys_open fs/open.c:1203 [inline] __do_sys_open fs/open.c:1211 [inline] __se_sys_open fs/open.c:1207 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1207 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fdde305e840 RSP: 002b:00007ffc937ee298 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055eafe71a6e0 RCX: 00007fdde305e840 RDX: 000055eafe191fe3 RSI: 00000000000a0800 RDI: 000055eafe71fe70 RBP: 00007ffc937ee410 R08: 000055eafe191670 R09: 0000000000000010 R10: 00007fdde2dd8d70 R11: 0000000000000246 R12: 00007ffc937ee360 R13: 000055eafe71fcf0 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.4:18694 blocked for more than 143 seconds. Not tainted 5.13.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28488 pid:18694 ppid: 8442 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5285 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 blkdev_put+0x59/0x580 fs/block_dev.c:1597 blkdev_close+0x8c/0xb0 fs/block_dev.c:1646 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x272/0x280 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f06f525e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff0eed407f R14: 00007f06f525e300 R15: 0000000000022000 INFO: task syz-executor.4:18701 blocked for more than 143 seconds. Not tainted 5.13.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28488 pid:18701 ppid: 8442 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5285 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 blkdev_get_by_dev fs/block_dev.c:1452 [inline] blkdev_get_by_dev+0x1f6/0x660 fs/block_dev.c:1425 blkdev_open+0x154/0x2b0 fs/block_dev.c:1548 do_dentry_open+0x4b9/0x11b0 fs/open.c:826 do_open fs/namei.c:3361 [inline] path_openat+0x1c0e/0x27e0 fs/namei.c:3494 do_filp_open+0x190/0x3d0 fs/namei.c:3521 do_sys_openat2+0x16d/0x420 fs/open.c:1187 do_sys_open fs/open.c:1203 [inline] __do_sys_openat fs/open.c:1219 [inline] __se_sys_openat fs/open.c:1214 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1214 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4196c4 RSP: 002b:00007f06f523ccc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004196c4 RDX: 0000000000000000 RSI: 00007f06f523cd60 RDI: 00000000ffffff9c RBP: 00007f06f523cd60 R08: 0000000000000000 R09: 002364626e2f7665 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007fff0eed407f R14: 00007f06f523d300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1637: #0: ffffffff8bf792a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333 1 lock held by systemd-udevd/18641: #0: ffff88814593aea0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev fs/block_dev.c:1452 [inline] #0: ffff88814593aea0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x1f6/0x660 fs/block_dev.c:1425 1 lock held by syz-executor.4/18694: #0: ffff88814593aea0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x59/0x580 fs/block_dev.c:1597 1 lock held by syz-executor.4/18701: #0: ffff88814593aea0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev fs/block_dev.c:1452 [inline] #0: ffff88814593aea0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x1f6/0x660 fs/block_dev.c:1425 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1637 Comm: khungtaskd Not tainted 5.13.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd48/0xfb0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:108 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x1c9/0x250 drivers/acpi/processor_idle.c:513