INFO: task syz-executor.3:23070 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:26160 pid:23070 ppid: 6932 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
loop_set_status+0x17d/0x930 drivers/block/loop.c:1264
loop_set_status_old+0x148/0x1b0 drivers/block/loop.c:1396
lo_ioctl+0x3e9/0x17c0 drivers/block/loop.c:1566
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: 0033:0x7fad16a95ae9
RSP: 002b:00007fad1400b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fad16ba8f60 RCX: 00007fad16a95ae9
RDX: 0000000020000780 RSI: 0000000000004c02 RDI: 0000000000000003
RBP: 00007fad16aeff6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fad170dcb2f R14: 00007fad1400b300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6215:
#0: ffff88801a3feaf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by kworker/u4:3/22275:
1 lock held by syz-executor.3/23070:
#0: ffff88801a748360 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_set_status+0x2a/0x930 drivers/block/loop.c:1248
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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+0xc1d/0xf50 kernel/hung_task.c:295
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: 6217 Comm: rs:main Q:Reg Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
RIP: 0010:rcu_is_watching+0x9/0xb0 kernel/rcu/tree.c:1121
Code: 90 48 c7 c7 a0 70 ad 89 e8 b4 ee ee 07 65 8a 05 b9 5e a0 7e 0f be c0 c3 66 0f 1f 84 00 00 00 00 00 55 53 65 ff 05 27 24 9f 7e 72 ee ee 07 48 c7 c3 50 aa 03 00 83 f8 07 89 c5 77 77 48 8d 3c
RSP: 0018:ffffc9000afafa28 EFLAGS: 00000282
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88801cbf0000 RSI: ffffffff81d68708 RDI: 0000000000000003
RBP: ffff88806f862a80 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff81d68160 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88807f4ae000 R14: ffffc9000afafb08 R15: 0000000000000000
FS: 00007fc827fff700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0524a54d40 CR3: 000000006fd67000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
trace_writeback_mark_inode_dirty include/trace/events/writeback.h:127 [inline]
__mark_inode_dirty+0x65b/0xfe0 fs/fs-writeback.c:2387
generic_update_time+0x21d/0x350 fs/inode.c:1784
inode_update_time fs/inode.c:1797 [inline]
file_update_time+0x434/0x520 fs/inode.c:2014
file_modified fs/inode.c:2037 [inline]
file_modified+0x7d/0xa0 fs/inode.c:2022
ext4_write_checks fs/ext4/file.c:247 [inline]
ext4_buffered_write_iter+0xff/0x3b0 fs/ext4/file.c:264
ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:681
call_write_iter include/linux/fs.h:2162 [inline]
new_sync_write+0x429/0x660 fs/read_write.c:503
vfs_write+0x7cd/0xae0 fs/read_write.c:590
ksys_write+0x12d/0x250 fs/read_write.c:643
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: 0033:0x7fc82eef31cd
Code: c2 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ae fc ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 f7 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fc827ffe590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc818027780 RCX: 00007fc82eef31cd
RDX: 00000000000004ec RSI: 00007fc818027780 RDI: 000000000000000a
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fc818027500
R13: 00007fc827ffe5b0 R14: 0000559819fba7c0 R15: 00000000000004ec
----------------
Code disassembly (best guess):
0: 90 nop
1: 48 c7 c7 a0 70 ad 89 mov $0xffffffff89ad70a0,%rdi
8: e8 b4 ee ee 07 callq 0x7eeeec1
d: 65 8a 05 b9 5e a0 7e mov %gs:0x7ea05eb9(%rip),%al # 0x7ea05ecd
14: 0f be c0 movsbl %al,%eax
17: c3 retq
18: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1)
1f: 00 00
21: 55 push %rbp
22: 53 push %rbx
23: 65 ff 05 27 24 9f 7e incl %gs:0x7e9f2427(%rip) # 0x7e9f2451
* 2a: e8 72 ee ee 07 callq 0x7eeeea1 <-- trapping instruction
2f: 48 c7 c3 50 aa 03 00 mov $0x3aa50,%rbx
36: 83 f8 07 cmp $0x7,%eax
39: 89 c5 mov %eax,%ebp
3b: 77 77 ja 0xb4
3d: 48 rex.W
3e: 8d .byte 0x8d
3f: 3c .byte 0x3c