INFO: task systemd-udevd:10406 blocked for more than 143 seconds. Not tainted 5.14.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26792 pid:10406 ppid: 4863 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 io_schedule+0xba/0x130 kernel/sched/core.c:8008 wait_on_page_bit_common+0x537/0xe60 mm/filemap.c:1301 wait_on_page_bit mm/filemap.c:1362 [inline] wait_on_page_locked include/linux/pagemap.h:689 [inline] wait_on_page_read mm/filemap.c:3312 [inline] do_read_cache_page+0x96b/0x13c0 mm/filemap.c:3355 read_mapping_page include/linux/pagemap.h:515 [inline] read_part_sector+0x146/0x620 block/partitions/core.c:726 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:147 [inline] blk_add_partitions block/partitions/core.c:611 [inline] bdev_disk_changed+0x796/0x1130 block/partitions/core.c:697 blkdev_get_whole+0x216/0x420 fs/block_dev.c:1269 blkdev_get_by_dev.part.0+0x30c/0xdd0 fs/block_dev.c:1417 blkdev_get_by_dev fs/block_dev.c:1506 [inline] blkdev_open+0x295/0x300 fs/block_dev.c:1512 do_dentry_open+0x4c8/0x11d0 fs/open.c:826 do_open fs/namei.c:3374 [inline] path_openat+0x1c23/0x27f0 fs/namei.c:3507 do_filp_open+0x1aa/0x400 fs/namei.c:3534 do_sys_openat2+0x16d/0x420 fs/open.c:1204 do_sys_open fs/open.c:1220 [inline] __do_sys_open fs/open.c:1228 [inline] __se_sys_open fs/open.c:1224 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1224 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f3d5e954840 RSP: 002b:00007ffcee2c4bc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000555e6e232a60 RCX: 00007f3d5e954840 RDX: 0000555e6c952fe3 RSI: 00000000000a0800 RDI: 0000555e6e234700 RBP: 00007ffcee2c4d40 R08: 0000555e6c952670 R09: 0000000000000010 R10: 0000555e6c952d0c R11: 0000000000000246 R12: 00007ffcee2c4c90 R13: 0000555e6e222790 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.3:15338 blocked for more than 143 seconds. Not tainted 5.14.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28016 pid:15338 ppid: 8451 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6078 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104 blkdev_put+0xa0/0xae0 fs/block_dev.c:1534 blkdev_close+0x8c/0xb0 fs/block_dev.c:1586 __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:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193fb RSP: 002b:00007ffd3c42bb30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004193fb RDX: 0000001b2be269f0 RSI: ffffffff8135a292 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2be25054 R10: 00000000000012d1 R11: 0000000000000293 R12: 000000000056cb00 R13: 000000000056cb00 R14: 000000000056bf80 R15: 00000000000535f7 Showing all locks held in the system: 1 lock held by khungtaskd/1636: #0: ffffffff8b979740 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 2 locks held by in:imklog/8146: #0: ffff8880151b76b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 #1: ffffffff903f0f10 (&obj_hash[i].lock){-.-.}-{2:2}, at: double_lock_hb kernel/futex.c:1573 [inline] #1: ffffffff903f0f10 (&obj_hash[i].lock){-.-.}-{2:2}, at: double_lock_hb kernel/futex.c:1568 [inline] #1: ffffffff903f0f10 (&obj_hash[i].lock){-.-.}-{2:2}, at: futex_wake_op kernel/futex.c:1709 [inline] #1: ffffffff903f0f10 (&obj_hash[i].lock){-.-.}-{2:2}, at: do_futex+0xaf3/0x1770 kernel/futex.c:3741 1 lock held by systemd-udevd/10406: #0: ffff88801d996918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9d/0xdd0 fs/block_dev.c:1410 1 lock held by syz-executor.3/15338: #0: ffff88801d996918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xa0/0xae0 fs/block_dev.c:1534 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1636 Comm: khungtaskd Not tainted 5.14.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 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:210 [inline] watchdog+0xd0a/0xfc0 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 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: 4859 Comm: systemd-journal Not tainted 5.14.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_next_frame+0x838/0x1ce0 arch/x86/kernel/unwind_orc.c:466 Code: c0 40 84 c7 0f 85 bc 0f 00 00 49 0f bf 30 48 01 d6 48 89 74 24 60 e9 d8 fd ff ff 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 <48> c1 ea 03 80 3c 02 00 0f 85 cb 12 00 00 4c 89 c0 49 8b 56 38 48 RSP: 0018:ffffc900016c77e0 EFLAGS: 00000097 RAX: dffffc0000000000 RBX: 1ffff920002d8f04 RCX: ffffffff8de5de6d RDX: ffffc900016c7940 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff8de5de68 R09: ffffffff8de5de68 R10: fffff520002d8f2c R11: 0000000000086088 R12: ffffc900016c7950 R13: ffffc900016c793d R14: ffffc900016c7908 R15: ffffffff8de5de6c FS: 00007f22205208c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f221daf3018 CR3: 0000000029d75000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __unwind_start+0x51b/0x800 arch/x86/kernel/unwind_orc.c:699 unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x5c/0xe0 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xcd/0x100 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] __cache_free mm/slab.c:3445 [inline] kmem_cache_free+0x68/0x200 mm/slab.c:3740 putname+0xe1/0x120 fs/namei.c:259 filename_lookup+0x3df/0x5b0 fs/namei.c:2477 user_path_at include/linux/namei.h:57 [inline] do_faccessat+0x127/0x850 fs/open.c:425 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f221f7db9c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffffe121a58 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffffe124970 RCX: 00007f221f7db9c7 RDX: 00007f222024ca00 RSI: 0000000000000000 RDI: 000055fd527979a3 RBP: 00007ffffe121a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffffe124970 R15: 00007ffffe121f80