INFO: task systemd-udevd:19567 blocked for more than 143 seconds. Not tainted 5.11.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26448 pid:19567 ppid: 4892 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4313 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5064 schedule+0xcf/0x270 kernel/sched/core.c:5143 io_schedule+0xba/0x130 kernel/sched/core.c:6838 wait_on_page_bit_common+0x424/0xeb0 mm/filemap.c:1273 wait_on_page_bit mm/filemap.c:1334 [inline] wait_on_page_locked include/linux/pagemap.h:674 [inline] wait_on_page_read mm/filemap.c:3061 [inline] do_read_cache_page+0x957/0x1390 mm/filemap.c:3104 read_mapping_page include/linux/pagemap.h:500 [inline] read_part_sector+0x140/0x610 block/partitions/core.c:693 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:148 [inline] blk_add_partitions+0x57c/0xf10 block/partitions/core.c:621 bdev_disk_changed+0x1fd/0x410 fs/block_dev.c:1251 __blkdev_get+0xa21/0xc10 fs/block_dev.c:1333 blkdev_get_by_dev fs/block_dev.c:1437 [inline] blkdev_get_by_dev+0x260/0x5e0 fs/block_dev.c:1405 blkdev_open+0x154/0x2b0 fs/block_dev.c:1534 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3254 [inline] path_openat+0x1b9a/0x2730 fs/namei.c:3371 do_filp_open+0x17e/0x3c0 fs/namei.c:3398 do_sys_openat2+0x16d/0x420 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_sys_open fs/open.c:1196 [inline] __se_sys_open fs/open.c:1192 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1192 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fa4a241e840 RSP: 002b:00007fffbda51528 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055693b5218c0 RCX: 00007fa4a241e840 RDX: 000055693a00efe3 RSI: 00000000000a0800 RDI: 000055693b521ae0 RBP: 00007fffbda516a0 R08: 000055693a00e670 R09: 0000000000000010 R10: 000055693a00ed0c R11: 0000000000000246 R12: 00007fffbda515f0 R13: 000055693b51de60 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.2:20039 blocked for more than 143 seconds. Not tainted 5.11.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28152 pid:20039 ppid: 8482 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4313 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5064 schedule+0xcf/0x270 kernel/sched/core.c:5143 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5202 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 blkdev_put+0x59/0x570 fs/block_dev.c:1583 blkdev_close+0x8c/0xb0 fs/block_dev.c:1632 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 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+0x249/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417b71 RSP: 002b:00007fff0465c020 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000417b71 RDX: 0000001b2dd20000 RSI: 0000000080000000 RDI: 0000000000000003 RBP: 0000000000000001 R08: 00000000000016b9 R09: 00000000f49d96bd R10: 00007fff0465c100 R11: 0000000000000293 R12: 000000000119ca00 R13: 000000000119ca00 R14: 00000000000003e8 R15: 000000000119c034 Showing all locks held in the system: 1 lock held by khungtaskd/1645: #0: ffffffff8b373920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254 1 lock held by in:imklog/8152: #0: ffff888012edf130 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 1 lock held by systemd-udevd/19567: #0: ffff8881444f53a0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev fs/block_dev.c:1436 [inline] #0: ffff8881444f53a0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x255/0x5e0 fs/block_dev.c:1405 1 lock held by syz-executor.2/20039: #0: ffff8881444f53a0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x59/0x570 fs/block_dev.c:1583 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1645 Comm: khungtaskd Not tainted 5.11.0-rc3-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+0x107/0x163 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+0xd43/0xfa0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4878 Comm: systemd-journal Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:trace_irq_disable include/trace/events/preemptirq.h:36 [inline] RIP: 0010:trace_hardirqs_off_finish kernel/trace/trace_preemptirq.c:67 [inline] RIP: 0010:trace_hardirqs_off_finish+0xcc/0x270 kernel/trace/trace_preemptirq.c:61 Code: 0f a3 1d 4f 00 8b 0b 0f 92 c3 31 ff 89 de e8 2b 32 fa ff 84 db 74 8c e8 42 2a fa ff 65 ff 05 eb 4d 89 7e 48 8b 05 a4 4c 77 0b 6f be 81 07 31 ff 89 c3 89 c6 e8 44 30 fa ff 85 db 74 1d e8 1b RSP: 0018:ffffc90001357f18 EFLAGS: 00000083 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff888014b5c400 RSI: ffffffff8178a1ce RDI: 0000000000000003 RBP: ffffffff88fa66f8 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff8178a1c5 R11: 0000000000000000 R12: 0000000000000027 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fea8c1ea8c0(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fea89798010 CR3: 0000000014c1e000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __enter_from_user_mode kernel/entry/common.c:24 [inline] syscall_enter_from_user_mode+0x18/0x50 kernel/entry/common.c:103 do_syscall_64+0xf/0x70 arch/x86/entry/common.c:41 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fea8b483f17 Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007fff35407148 EFLAGS: 00000206 ORIG_RAX: 0000000000000027 RAX: ffffffffffffffda RBX: 00005577494a4200 RCX: 00007fea8b483f17 RDX: 0000000000000000 RSI: 000000002d4c03ee RDI: 00005577494a4200 RBP: 000000000000130e R08: 00005577494aee90 R09: 00007fff355d90f0 R10: 0000000000024ae6 R11: 0000000000000206 R12: ffffffffffffffff R13: 00007fff354071f8 R14: 0000557748f29958 R15: 0005b8d6ab5c7fe5