INFO: task syz-executor.3:13883 can't die for more than 143 seconds.
task:syz-executor.3 state:D stack:26232 pid:13883 ppid: 6561 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
__loop_clr_fd+0x1ae/0x1070 drivers/block/loop.c:1122
loop_clr_fd drivers/block/loop.c:1237 [inline]
lo_ioctl+0x398/0x17c0 drivers/block/loop.c:1562
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7f61234ee8a7
RSP: 002b:00007f6120a63fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020003bc0 RCX: 00007f61234ee8a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000005
RBP: 00007f6120a646bc R08: 00007f6120a64040 R09: 0000000020003940
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000016 R14: 00007f6120a64000 R15: 00000000200003c0
INFO: task syz-executor.3:13883 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:syz-executor.3 state:D stack:26232 pid:13883 ppid: 6561 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
__loop_clr_fd+0x1ae/0x1070 drivers/block/loop.c:1122
loop_clr_fd drivers/block/loop.c:1237 [inline]
lo_ioctl+0x398/0x17c0 drivers/block/loop.c:1562
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7f61234ee8a7
RSP: 002b:00007f6120a63fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020003bc0 RCX: 00007f61234ee8a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000005
RBP: 00007f6120a646bc R08: 00007f6120a64040 R09: 0000000020003940
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000016 R14: 00007f6120a64000 R15: 00000000200003c0
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
2 locks held by systemd-udevd/2974:
#0: ffff88801a8ba918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff88801a8b6360 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by in:imklog/6231:
#0: ffff888072a0d770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by agetty/6460:
#0: ffff88801d469098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002a8c2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.3/13883:
#0: ffff88801a8b6360 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106
=============================================
NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2964 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:handle_mounts fs/namei.c:1480 [inline]
RIP: 0010:step_into+0x8f/0x1c80 fs/namei.c:1800
Code: ff ff ff e0 cc cc 81 c7 00 f1 f1 f1 f1 c7 40 04 f1 f1 01 f2 c7 40 08 00 00 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 c8 31 c0 8c d6 aa ff 48 89 d8 48 c1 e8 03 42 80 3c 30 00 0f 85 fc 16 00
RSP: 0018:ffffc90001ccf908 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90001ccfc28 RCX: ffff88807e0ee650
RDX: ffff888145bb5be8 RSI: 0000000000000002 RDI: ffffc90001ccfc28
RBP: ffffc90001ccfa00 R08: 0000000000000002 R09: ffff888145bb5c58
R10: ffffffff81cd0052 R11: 0000000000000000 R12: ffff888145bb5be8
R13: ffff88807e0ee650 R14: dffffc0000000000 R15: ffff88803bdce625
FS: 00007f36fd1f88c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36f97dc020 CR3: 000000007d6ad000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
walk_component+0x171/0x6a0 fs/namei.c:1976
link_path_walk.part.0+0x757/0xd00 fs/namei.c:2297
link_path_walk fs/namei.c:2222 [inline]
path_parentat+0xb1/0x1c0 fs/namei.c:2496
filename_parentat+0x1bb/0x5a0 fs/namei.c:2519
filename_create+0xa1/0x480 fs/namei.c:3637
do_mkdirat+0x94/0x300 fs/namei.c:3898
__do_sys_mkdir fs/namei.c:3929 [inline]
__se_sys_mkdir fs/namei.c:3927 [inline]
__x64_sys_mkdir+0xf2/0x140 fs/namei.c:3927
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: 0033:0x7f36fc4b3687
Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffcca1081e8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffcca10b100 RCX: 00007f36fc4b3687
RDX: 00007f36fcf24a00 RSI: 00000000000001ed RDI: 000055dd231b58a0
RBP: 00007ffcca108220 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffcca10b100 R15: 00007ffcca108710
----------------
Code disassembly (best guess), 2 bytes skipped:
0: ff e0 jmpq *%rax
2: cc int3
3: cc int3
4: 81 c7 00 f1 f1 f1 add $0xf1f1f100,%edi
a: f1 icebp
b: c7 40 04 f1 f1 01 f2 movl $0xf201f1f1,0x4(%rax)
12: c7 40 08 00 00 f3 f3 movl $0xf3f30000,0x8(%rax)
19: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
20: 00 00
22: 48 89 45 c8 mov %rax,-0x38(%rbp)
26: 31 c0 xor %eax,%eax
* 28: e8 8c d6 aa ff callq 0xffaad6b9 <-- trapping instruction
2d: 48 89 d8 mov %rbx,%rax
30: 48 c1 e8 03 shr $0x3,%rax
34: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
39: 0f .byte 0xf
3a: 85 fc test %edi,%esp
3c: 16 (bad)