INFO: task syz-executor.1:28355 can't die for more than 143 seconds.
task:syz-executor.1 state:D stack:27144 pid:28355 ppid: 7760 flags:0x00000004
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: 0033:0x7f6e8cfa08a7
RSP: 002b:00007f6e8a515fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000200093c0 RCX: 00007f6e8cfa08a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004
RBP: 00007f6e8a5166bc R08: 00007f6e8a516040 R09: 00000000200091c0
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 00007f6e8a516000 R15: 0000000020009400
INFO: task syz-executor.1:28355 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.1 state:D stack:27144 pid:28355 ppid: 7760 flags:0x00000004
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: 0033:0x7f6e8cfa08a7
RSP: 002b:00007f6e8a515fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000200093c0 RCX: 00007f6e8cfa08a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004
RBP: 00007f6e8a5166bc R08: 00007f6e8a516040 R09: 00000000200091c0
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 00007f6e8a516000 R15: 0000000020009400
INFO: task syz-executor.1:28382 can't die for more than 143 seconds.
task:syz-executor.1 state:D stack:28496 pid:28382 ppid: 7760 flags:0x00000004
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
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6400
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859
blkdev_open+0x154/0x2e0 block/fops.c:501
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
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_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
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: 0033:0x7f6e8cf53a04
RSP: 002b:00007f6e8a4f4ed0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f6e8cfea970 RCX: 00007f6e8cf53a04
RDX: 0000000000000002 RSI: 00007f6e8a4f5000 RDI: 00000000ffffff9c
RBP: 00007f6e8a4f5000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 0000000000000003 R14: 00000000200093c0 R15: 0000000000000000
INFO: task syz-executor.1:28382 blocked for more than 144 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.1 state:D stack:28496 pid:28382 ppid: 7760 flags:0x00000004
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
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6400
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859
blkdev_open+0x154/0x2e0 block/fops.c:501
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
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_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
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: 0033:0x7f6e8cf53a04
RSP: 002b:00007f6e8a4f4ed0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f6e8cfea970 RCX: 00007f6e8cf53a04
RDX: 0000000000000002 RSI: 00007f6e8a4f5000 RDI: 00000000ffffff9c
RBP: 00007f6e8a4f5000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 0000000000000003 R14: 00000000200093c0 R15: 0000000000000000
Showing all locks held in the system:
no locks held by ksoftirqd/0/13.
1 lock held by khungtaskd/27:
#0: ffffffff8bb83ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by systemd-journal/2968:
2 locks held by in:imklog/6449:
#0: ffff888079b2e870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
2 locks held by agetty/6459:
#0: ffff88807aac3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc9000295d2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
2 locks held by agetty/6463:
#0: ffff888022f25098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002a2c2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
2 locks held by systemd-udevd/24940:
#0: ffff88801a588918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff88801a584b60 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by syz-executor.1/28355:
#0: ffff88801a584b60 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106
1 lock held by syz-executor.1/28382:
#0: ffff88801a588918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2968 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:rcu_note_context_switch+0x4/0x17f0 kernel/rcu/tree_plugin.h:309
Code: ff e8 f0 b0 5a 00 e9 34 ff ff ff 48 c7 c7 00 b4 7c 8d e8 df b0 5a 00 e9 6c ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 <41> 55 41 54 41 89 fc 55 53 48 c7 c3 00 a9 03 00 48 83 ec 50 e8 43
RSP: 0018:ffffc9000b62fa28 EFLAGS: 00000093
RAX: 0000000000000000 RBX: ffffc9000b628000 RCX: 0000000000000000
RDX: ffff88807a6a9d40 RSI: ffffffff8942ba42 RDI: 0000000000000000
RBP: ffffc9000b62fb58 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff817de4fd R11: 0000000000000000 R12: ffffffff8942de82
R13: ffff8880b9c39a80 R14: 0000000000000001 R15: 0000000000000000
FS: 00007f8ec2ab18c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8ec02f8010 CR3: 000000001bdb9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__schedule+0x238/0x4940 kernel/sched/core.c:6165
schedule+0xd2/0x260 kernel/sched/core.c:6341
schedule_hrtimeout_range_clock+0x343/0x390 kernel/time/hrtimer.c:2296
ep_poll fs/eventpoll.c:1849 [inline]
do_epoll_wait+0x1298/0x1940 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: 0033:0x7f8ec1d7a2e3
Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 29 54 2b 00 00 75 13 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
RSP: 002b:00007ffd51cdd908 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000561f53dc31e0 RCX: 00007f8ec1d7a2e3
RDX: 0000000000000013 RSI: 00007ffd51cdd910 RDI: 0000000000000008
RBP: 00007ffd51cddb00 R08: 00000000619ac889 R09: 00007ffd51de5080
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd51cdd910
R13: 0000000000000001 R14: ffffffffffffffff R15: 0005d1540e717935
----------------
Code disassembly (best guess), 1 bytes skipped:
0: e8 f0 b0 5a 00 callq 0x5ab0f5
5: e9 34 ff ff ff jmpq 0xffffff3e
a: 48 c7 c7 00 b4 7c 8d mov $0xffffffff8d7cb400,%rdi
11: e8 df b0 5a 00 callq 0x5ab0f5
16: e9 6c ff ff ff jmpq 0xffffff87
1b: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
22: 00 00 00
25: 41 57 push %r15
27: 41 56 push %r14
* 29: 41 55 push %r13 <-- trapping instruction
2b: 41 54 push %r12
2d: 41 89 fc mov %edi,%r12d
30: 55 push %rbp
31: 53 push %rbx
32: 48 c7 c3 00 a9 03 00 mov $0x3a900,%rbx
39: 48 83 ec 50 sub $0x50,%rsp
3d: e8 .byte 0xe8
3e: 43 rex.XB