INFO: task systemd-udevd:2970 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:systemd-udevd state:D stack:22616 pid: 2970 ppid: 1 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6400
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859
blkdev_open+0x154/0x2e0 block/fops.c:501
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_open fs/open.c:1236 [inline]
__se_sys_open fs/open.c:1232 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1232
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: 0033:0x7f95eed10840
RSP: 002b:00007ffd77b608c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffd77b609a0 RCX: 00007f95eed10840
RDX: 0000559323d8ffe3 RSI: 00000000000a0800 RDI: 000055932538e8f0
RBP: 0000000000000000 R08: 0000559323d8f670 R09: 0000000000000010
R10: 0000000000000020 R11: 0000000000000246 R12: 00007ffd77b60a70
R13: 000055932538a010 R14: 00005593253b4cf0 R15: 00007ffd77b60940
INFO: task syz-executor.4:19753 can't die for more than 143 seconds.
task:syz-executor.4 state:D stack:26424 pid:19753 ppid: 9131 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
lo_release+0x160/0x1f0 drivers/block/loop.c:1768
blkdev_put_whole block/bdev.c:694 [inline]
blkdev_put+0x2fb/0x9e0 block/bdev.c:956
btrfs_close_bdev fs/btrfs/volumes.c:1114 [inline]
btrfs_close_bdev fs/btrfs/volumes.c:1104 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1135 [inline]
close_fs_devices+0x24f/0xa60 fs/btrfs/volumes.c:1178
btrfs_close_devices+0x8e/0x4b0 fs/btrfs/volumes.c:1193
open_ctree+0x48b7/0x495c fs/btrfs/disk-io.c:3700
btrfs_fill_super fs/btrfs/super.c:1359 [inline]
btrfs_mount_root.cold+0x15/0x162 fs/btrfs/super.c:1726
legacy_get_tree+0x105/0x220 fs/fs_context.c:610
vfs_get_tree+0x89/0x2f0 fs/super.c:1500
fc_mount fs/namespace.c:994 [inline]
vfs_kern_mount.part.0+0xd3/0x170 fs/namespace.c:1024
vfs_kern_mount+0x3c/0x60 fs/namespace.c:1011
btrfs_mount+0x234/0xa60 fs/btrfs/super.c:1786
legacy_get_tree+0x105/0x220 fs/fs_context.c:610
vfs_get_tree+0x89/0x2f0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3516
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: 0033:0x7f68d160201a
RSP: 002b:00007f68ceb75fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000200009c0 RCX: 00007f68d160201a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f68ceb76000
RBP: 00007f68ceb76040 R08: 00007f68ceb76040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f68ceb76000 R15: 00000000200005c0
INFO: task syz-executor.4:19753 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26424 pid:19753 ppid: 9131 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
lo_release+0x160/0x1f0 drivers/block/loop.c:1768
blkdev_put_whole block/bdev.c:694 [inline]
blkdev_put+0x2fb/0x9e0 block/bdev.c:956
btrfs_close_bdev fs/btrfs/volumes.c:1114 [inline]
btrfs_close_bdev fs/btrfs/volumes.c:1104 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1135 [inline]
close_fs_devices+0x24f/0xa60 fs/btrfs/volumes.c:1178
btrfs_close_devices+0x8e/0x4b0 fs/btrfs/volumes.c:1193
open_ctree+0x48b7/0x495c fs/btrfs/disk-io.c:3700
btrfs_fill_super fs/btrfs/super.c:1359 [inline]
btrfs_mount_root.cold+0x15/0x162 fs/btrfs/super.c:1726
legacy_get_tree+0x105/0x220 fs/fs_context.c:610
vfs_get_tree+0x89/0x2f0 fs/super.c:1500
fc_mount fs/namespace.c:994 [inline]
vfs_kern_mount.part.0+0xd3/0x170 fs/namespace.c:1024
vfs_kern_mount+0x3c/0x60 fs/namespace.c:1011
btrfs_mount+0x234/0xa60 fs/btrfs/super.c:1786
legacy_get_tree+0x105/0x220 fs/fs_context.c:610
vfs_get_tree+0x89/0x2f0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3516
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: 0033:0x7f68d160201a
RSP: 002b:00007f68ceb75fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000200009c0 RCX: 00007f68d160201a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f68ceb76000
RBP: 00007f68ceb76040 R08: 00007f68ceb76040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f68ceb76000 R15: 00000000200005c0
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb83ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by systemd-udevd/2970:
#0: ffff88801adf0918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
1 lock held by in:imklog/6271:
#0: ffff888019877270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
4 locks held by syz-executor.4/19753:
#0: ffff888021bb20e0 (&type->s_umount_key#62/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xac0 fs/super.c:229
#1: ffffffff8c25fb88 (uuid_mutex){+.+.}-{3:3}, at: btrfs_close_devices+0x86/0x4b0 fs/btrfs/volumes.c:1192
#2: ffff88801adf0918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#3: ffff88801ad54360 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:1748
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-next-20211118-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:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
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:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2966 Comm: systemd-journal Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x27e/0x54a0 kernel/locking/lockdep.c:4962
Code: b7 44 24 20 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 66 25 00 e0 09 c8 66 41 89 44 24 20 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 <0f> 85 43 3b 00 00 48 8b 84 24 28 01 00 00 49 8d 7c 24 10 48 89 fa
RSP: 0018:ffffc900027efb48 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff8bca8b80 RCX: 00000000000000a5
RDX: 1ffff1100f46f89e RSI: 0000000000000000 RDI: ffff88807a37c4f0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88807a37c4e8
R13: ffff88807a37ba80 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f1f5588b8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f52e6d000 CR3: 000000007ef12000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__fs_reclaim_acquire mm/page_alloc.c:4535 [inline]
fs_reclaim_acquire+0x115/0x160 mm/page_alloc.c:4549
might_alloc include/linux/sched/mm.h:248 [inline]
slab_pre_alloc_hook mm/slab.h:492 [inline]
slab_alloc_node mm/slub.c:3148 [inline]
slab_alloc mm/slub.c:3242 [inline]
kmem_cache_alloc+0x3e/0x3a0 mm/slub.c:3247
getname_flags.part.0+0x50/0x4f0 fs/namei.c:138
getname_flags+0x9a/0xe0 include/linux/audit.h:323
user_path_at_empty+0x2b/0x60 fs/namei.c:2800
user_path_at include/linux/namei.h:57 [inline]
do_faccessat+0x127/0x850 fs/open.c:421
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: 0033:0x7f1f54b469c7
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:00007ffc891f9018 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffc891fbf30 RCX: 00007f1f54b469c7
RDX: 00007f1f555b7a00 RSI: 0000000000000000 RDI: 000055f194af99a3
RBP: 00007ffc891f9050 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffc891fbf30 R15: 00007ffc891f9540
----------------
Code disassembly (best guess):
0: b7 44 mov $0x44,%bh
2: 24 20 and $0x20,%al
4: 49 8d 7c 24 08 lea 0x8(%r12),%rdi
9: 48 89 fa mov %rdi,%rdx
c: 48 c1 ea 03 shr $0x3,%rdx
10: 66 25 00 e0 and $0xe000,%ax
14: 09 c8 or %ecx,%eax
16: 66 41 89 44 24 20 mov %ax,0x20(%r12)
1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
23: fc ff df
26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
* 2a: 0f 85 43 3b 00 00 jne 0x3b73 <-- trapping instruction
30: 48 8b 84 24 28 01 00 mov 0x128(%rsp),%rax
37: 00
38: 49 8d 7c 24 10 lea 0x10(%r12),%rdi
3d: 48 89 fa mov %rdi,%rdx