INFO: task syz-executor.1:12152 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:25296 pid:12152 ppid: 6526 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
blk_mq_freeze_queue_wait+0x105/0x190 block/blk-mq.c:178
__loop_clr_fd+0x1c6/0x9b0 drivers/block/loop.c:1122
loop_clr_fd drivers/block/loop.c:1237 [inline]
lo_ioctl+0x107b/0x1f40 drivers/block/loop.c:1562
blkdev_ioctl+0x3ac/0x790 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb74c5088a7
RSP: 002b:00007fb749a7dfa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fb74c5088a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004
RBP: 00007fb749a7e6bc R08: 00007fb749a7e040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 00007fb749a7e000 R15: 0000000020010200
INFO: task syz-executor.1:12206 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26960 pid:12206 ppid: 6526 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
blkdev_get_by_dev+0xfc/0xb80 block/bdev.c:819
blkdev_open+0x137/0x2f0 block/fops.c:501
do_dentry_open+0x78b/0x1020 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x2896/0x3660 fs/namei.c:3559
do_filp_open+0x277/0x4f0 fs/namei.c:3586
do_sys_openat2+0x13b/0x500 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1239
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb74c4bba04
RSP: 002b:00007fb749a5ced0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb74c552970 RCX: 00007fb74c4bba04
RDX: 0000000000000002 RSI: 00007fb749a5d000 RDI: 00000000ffffff9c
RBP: 00007fb749a5d000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 0000000000000003 R14: 0000000020000218 R15: 0000000000000001
Showing all locks held in the system:
1 lock held by ksoftirqd/1/19:
#0: ffff8880b9b395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:478
1 lock held by khungtaskd/26:
#0: ffffffff8cb1dc00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by in:imklog/6202:
#0: ffff888079b460f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
5 locks held by kworker/u4:8/8723:
2 locks held by kworker/u4:14/9807:
#0: ffff8880b9b395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:478
#1: ffff8880b9b27888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4c1/0x780 kernel/sched/psi.c:880
1 lock held by syz-executor.1/12152:
#0: ffff88801ae74b60 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x6d/0x9b0 drivers/block/loop.c:1106
1 lock held by syz-executor.1/12206:
#0: ffff88801af08918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0xb80 block/bdev.c:819
2 locks held by systemd-udevd/12166:
#0: ffff88801af08918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0xb80 block/bdev.c:819
#1: ffff88801ae74b60 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x68/0x100 drivers/block/loop.c:1733
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 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+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2952 Comm: systemd-journal Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unwind_next_frame+0x9/0x1fc0 arch/x86/kernel/unwind_orc.c:418
Code: 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 95 4c 89 f7 e8 1c a2 95 00 eb 8b 66 2e 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 54 <53> 48 81 ec 88 00 00 00 49 89 fd 49 bf 00 00 00 00 00 fc ff df 48
RSP: 0018:ffffc90001aef950 EFLAGS: 00000002
RAX: 1ffff9200035df01 RBX: ffffc90001aef980 RCX: ffffffff8f33a000
RDX: dffffc0000000000 RSI: ffffffff81716989 RDI: ffffc90001aef980
RBP: ffffc90001aefa10 R08: 0000000000000004 R09: ffffc90001aefa70
R10: fffff5200035df3c R11: 0000000000000000 R12: ffff88807d765700
R13: ffffffff8171bd90 R14: ffffc90001aefa60 R15: 0000000000000000
FS: 00007fbdecd638c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbdea239000 CR3: 000000001e206000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:122
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xfa/0x130 mm/kasan/generic.c:348
__call_rcu kernel/rcu/tree.c:2985 [inline]
call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3065
task_work_run+0x146/0x1c0 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+0x209/0x220 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fbdec2f2840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007ffd39b3a7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: fffffffffffffffe RBX: 00007ffd39b3ab00 RCX: 00007fbdec2f2840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000559bc9d15f40
RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000559bc9d0b040 R14: 00007ffd39b3aac0 R15: 0000559bc9d15fc0
----------------
Code disassembly (best guess):
0: 44 89 f1 mov %r14d,%ecx
3: 80 e1 07 and $0x7,%cl
6: 80 c1 03 add $0x3,%cl
9: 38 c1 cmp %al,%cl
b: 7c 95 jl 0xffffffa2
d: 4c 89 f7 mov %r14,%rdi
10: e8 1c a2 95 00 callq 0x95a231
15: eb 8b jmp 0xffffffa2
17: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
1e: 00 00 00
21: 55 push %rbp
22: 41 57 push %r15
24: 41 56 push %r14
26: 41 55 push %r13
28: 41 54 push %r12
* 2a: 53 push %rbx <-- trapping instruction
2b: 48 81 ec 88 00 00 00 sub $0x88,%rsp
32: 49 89 fd mov %rdi,%r13
35: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15
3c: fc ff df
3f: 48 rex.W