INFO: task syz-executor.3:10127 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.3 state:D stack:27176 pid:10127 ppid: 6845 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
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: 0033:0x7fb97581fae9
RSP: 002b:00007fb972d95188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb975932f60 RCX: 00007fb97581fae9
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000006
RBP: 00007fb975879f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb975e66b2f R14: 00007fb972d95300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by kworker/u4:4/993:
#0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#1: ffffc90004cefdb0 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
1 lock held by in:imklog/6244:
#0: ffff88801cc154f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by systemd-udevd/10104:
#0: ffff88801a262918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff88801a106360 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by syz-executor.3/10127:
#0: ffff88801a106360 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 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+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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2964 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:filter_irq_stacks+0x26/0x90 kernel/stacktrace.c:398
Code: 00 00 00 00 41 54 41 89 f4 55 53 48 83 ec 08 85 f6 74 30 48 bd 00 00 00 00 00 fc ff df 31 db 48 89 f8 48 c1 e8 03 80 3c 28 00 <75> 4b 48 8b 07 48 3d 00 01 60 89 72 18 48 3d d0 0d 60 89 73 10 44
RSP: 0018:ffffc90001f7f7d8 EFLAGS: 00000246
RAX: 1ffff920003eff03 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 1ffff1100f62fc2a RSI: 000000000000000b RDI: ffffc90001f7f818
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 000000000000000b
R13: 0000000000000dc0 R14: 0000000000000dc0 R15: 0000000000000dc0
FS: 00007f3f0c4e38c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3f09929008 CR3: 000000007f31f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kasan_save_stack+0x28/0x50 mm/kasan/common.c:39
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:259 [inline]
slab_post_alloc_hook mm/slab.h:519 [inline]
slab_alloc_node mm/slub.c:3234 [inline]
slab_alloc mm/slub.c:3242 [inline]
kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3247
kmem_cache_zalloc include/linux/slab.h:714 [inline]
__alloc_file+0x21/0x280 fs/file_table.c:101
alloc_empty_file+0x6d/0x170 fs/file_table.c:150
path_openat+0xe1/0x2750 fs/namei.c:3545
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: 0033:0x7f3f0ba72840
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:00007ffc2e5f8ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffc2e5f8ff0 RCX: 00007f3f0ba72840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000563ba262f360
RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000563ba262b040 R14: 00007ffc2e5f8fb0 R15: 0000563ba2638350
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 41 54 push %r12
6: 41 89 f4 mov %esi,%r12d
9: 55 push %rbp
a: 53 push %rbx
b: 48 83 ec 08 sub $0x8,%rsp
f: 85 f6 test %esi,%esi
11: 74 30 je 0x43
13: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp
1a: fc ff df
1d: 31 db xor %ebx,%ebx
1f: 48 89 f8 mov %rdi,%rax
22: 48 c1 e8 03 shr $0x3,%rax
26: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1)
* 2a: 75 4b jne 0x77 <-- trapping instruction
2c: 48 8b 07 mov (%rdi),%rax
2f: 48 3d 00 01 60 89 cmp $0xffffffff89600100,%rax
35: 72 18 jb 0x4f
37: 48 3d d0 0d 60 89 cmp $0xffffffff89600dd0,%rax
3d: 73 10 jae 0x4f
3f: 44 rex.R