INFO: task syz-executor.5:11355 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.5 state:D stack:25752 pid:11355 ppid: 3219 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_set_status+0x440/0x930 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: 0033:0x7fcc11740ae9
RSP: 002b:00007fcc0ecb6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcc11853f60 RCX: 00007fcc11740ae9
RDX: 0000000020000940 RSI: 0000000000004c02 RDI: 0000000000000004
RBP: 00007fcc1179af6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe74aa021f R14: 00007fcc0ecb6300 R15: 0000000000022000
INFO: task syz-executor.5:11362 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.5 state:D stack:26024 pid:11362 ppid: 3219 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
__bio_queue_enter+0x3c5/0x6a0 block/blk-core.c:441
bio_queue_enter block/blk.h:91 [inline]
blk_mq_get_request block/blk-mq.c:2588 [inline]
blk_mq_submit_bio+0x4ae/0x22c0 block/blk-mq.c:2632
__submit_bio block/blk-core.c:849 [inline]
__submit_bio_noacct_mq block/blk-core.c:924 [inline]
submit_bio_noacct block/blk-core.c:950 [inline]
submit_bio_noacct+0x82c/0xa20 block/blk-core.c:939
submit_bio block/blk-core.c:1011 [inline]
submit_bio+0x1ea/0x430 block/blk-core.c:969
mpage_bio_submit fs/mpage.c:66 [inline]
mpage_readahead+0x589/0x750 fs/mpage.c:393
read_pages+0x1e4/0xfa0 mm/readahead.c:129
page_cache_ra_unbounded+0x64b/0x940 mm/readahead.c:238
do_page_cache_ra mm/readahead.c:268 [inline]
ondemand_readahead+0x594/0x1090 mm/readahead.c:551
page_cache_async_ra mm/readahead.c:608 [inline]
page_cache_async_ra+0x2e1/0x3f0 mm/readahead.c:583
page_cache_async_readahead include/linux/pagemap.h:1036 [inline]
filemap_readahead mm/filemap.c:2531 [inline]
filemap_get_pages+0x6f1/0x1be0 mm/filemap.c:2572
filemap_read+0x315/0xeb0 mm/filemap.c:2642
generic_file_read_iter+0x3b6/0x5a0 mm/filemap.c:2792
blkdev_read_iter+0xf8/0x1d0 block/fops.c:583
call_read_iter include/linux/fs.h:2156 [inline]
generic_file_splice_read+0x453/0x6d0 fs/splice.c:311
do_splice_to+0x1bf/0x250 fs/splice.c:796
splice_direct_to_actor+0x2c2/0x8c0 fs/splice.c:870
do_splice_direct+0x1b3/0x280 fs/splice.c:979
do_sendfile+0xaf2/0x1250 fs/read_write.c:1245
__do_sys_sendfile64 fs/read_write.c:1310 [inline]
__se_sys_sendfile64 fs/read_write.c:1296 [inline]
__x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296
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: 0033:0x7fcc11740ae9
RSP: 002b:00007fcc0ec95188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fcc11854020 RCX: 00007fcc11740ae9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007fcc1179af6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000424002d9f R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe74aa021f R14: 00007fcc0ec95300 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 systemd-journal/2957:
2 locks held by systemd-udevd/2970:
#0: ffff88801a247118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff88801a242b60 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
2 locks held by in:imklog/6214:
#0: ffff88801df66d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffffc90000dfc820 (&futex_queues[i].lock/1){+.+.}-{2:2}, at: __wake_up_common_lock+0xb4/0x130 kernel/sched/wait.c:137
2 locks held by kworker/0:5/8105:
#0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#1: ffff8880b9c279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880
1 lock held by syz-executor.5/11355:
#0: ffff88801a242b60 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_set_status+0x2a/0x930 drivers/block/loop.c:1248
1 lock held by syz-executor.5/11362:
#0: ffff888145fdf348 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff888145fdf348 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x1b3/0x940 mm/readahead.c:194
=============================================
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: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: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: 3053 Comm: systemd-timesyn Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:is_file_epoll fs/eventpoll.c:328 [inline]
RIP: 0010:ep_item_poll+0xa6/0x190 fs/eventpoll.c:845
Code: 02 84 c0 74 08 3c 03 0f 8e c7 00 00 00 49 8d 7d 28 44 89 75 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 bb 00 00 00 4d 8b 75 28 49 81 fe c0 d5 ba 89 74 6f e8 f2 69
RSP: 0018:ffffc90001a6fc50 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff888018c736c0 RCX: 0000000000000000
RDX: 1ffff11003f49325 RSI: ffffffff81dd2d78 RDI: ffff88801fa49928
RBP: ffffc90001a6fda8 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff81dd4985 R11: 0000000000000000 R12: ffff888018c73728
R13: ffff88801fa49900 R14: 0000000000000019 R15: 0000000000000001
FS: 00007fb4150678c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7159956000 CR3: 000000001e01b000 CR4: 0000000000350ef0
Call Trace:
ep_send_events fs/eventpoll.c:1685 [inline]
ep_poll fs/eventpoll.c:1799 [inline]
do_epoll_wait+0x734/0x1940 fs/eventpoll.c:2227
__do_sys_epoll_wait fs/eventpoll.c:2239 [inline]
__se_sys_epoll_wait fs/eventpoll.c:2234 [inline]
__x64_sys_epoll_wait+0x158/0x270 fs/eventpoll.c:2234
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: 0033:0x7fb41445c303
Code: 49 89 ca b8 e8 00 00 00 0f 05 48 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 0b c2 00 00 48 89 04 24 49 89 ca b8 e8 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 51 c2 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fff5b0b4ec0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 000055a8fe2fc8f0 RCX: 00007fb41445c303
RDX: 0000000000000006 RSI: 00007fff5b0b4ed0 RDI: 0000000000000004
RBP: 00007fff5b0b5020 R08: 431bde82d7b634db R09: 00007fff5b179080
R10: 00000000ffffffff R11: 0000000000000293 R12: 00007fff5b0b4ed0
R13: 0000000000000001 R14: ffffffffffffffff R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 02 84 c0 74 08 3c 03 add 0x33c0874(%rax,%rax,8),%al
7: 0f 8e c7 00 00 00 jle 0xd4
d: 49 8d 7d 28 lea 0x28(%r13),%rdi
11: 44 89 75 08 mov %r14d,0x8(%rbp)
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 48 89 fa mov %rdi,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
* 2a: 0f 85 bb 00 00 00 jne 0xeb <-- trapping instruction
30: 4d 8b 75 28 mov 0x28(%r13),%r14
34: 49 81 fe c0 d5 ba 89 cmp $0xffffffff89bad5c0,%r14
3b: 74 6f je 0xac
3d: e8 .byte 0xe8
3e: f2 repnz
3f: 69 .byte 0x69