INFO: task syz-executor.2:17957 can't die for more than 143 seconds.
task:syz-executor.2 state:D stack:27616 pid:17957 ppid: 6570 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: 0033:0x7fc101e268a7
RSP: 002b:00007fc0ff39bfa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020002780 RCX: 00007fc101e268a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000007
RBP: 00007fc0ff39c6bc R08: 00007fc0ff39c040 R09: 0000000020000280
R10: 0000000000000040 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 00007fc0ff39c000 R15: 0000000020000340
INFO: task syz-executor.2:17957 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.2 state:D stack:27616 pid:17957 ppid: 6570 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: 0033:0x7fc101e268a7
RSP: 002b:00007fc0ff39bfa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020002780 RCX: 00007fc101e268a7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000007
RBP: 00007fc0ff39c6bc R08: 00007fc0ff39c040 R09: 0000000020000280
R10: 0000000000000040 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 00007fc0ff39c000 R15: 0000000020000340
Showing all locks held in the system:
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
2 locks held by kworker/u4:4/985:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#1: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880
2 locks held by systemd-udevd/2976:
#0: ffff88801a874118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff888146e57b60 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by in:imklog/6340:
#0: ffff88807a6340f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
1 lock held by syz-executor.2/17957:
#0: ffff888146e57b60 (&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-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: 11103 Comm: kworker/0:13 Not tainted 5.16.0-rc1-next-20211118-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:check_kcov_mode+0x31/0x40 kernel/kcov.c:178
Code: 89 c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 ac 15 00 00 85 d2 74 0b 8b 86 88 15 00 00 39 f8 0f 94 c0 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 31 c0 65 8b 15 67 d0
RSP: 0018:ffffc9000976f9b0 EFLAGS: 00000093
RAX: 0000000000000000 RBX: 00000000a608b41c RCX: 0000000000000010
RDX: 0000000000000000 RSI: ffff88806e9a1d40 RDI: 0000000000000003
RBP: 000000002302f719 R08: 0000000000000014 R09: 00000000d0a9d923
R10: ffffffff83d7ab88 R11: 000000003d2a627d R12: 00000000d347a162
R13: 0000000054b2a3c7 R14: 000000005c201c41 R15: 00000000b85b1f28
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa597021000 CR3: 000000007f571000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
write_comp_data kernel/kcov.c:221 [inline]
__sanitizer_cov_trace_cmp4+0x1c/0x70 kernel/kcov.c:261
chacha_permute+0x5b8/0x6e0 lib/crypto/chacha.c:23
chacha_block_generic+0x98/0x250 lib/crypto/chacha.c:83
chacha20_block include/crypto/chacha.h:36 [inline]
_extract_crng+0x12f/0x250 drivers/char/random.c:1000
extract_crng drivers/char/random.c:1016 [inline]
_get_random_bytes+0x229/0x670 drivers/char/random.c:1538
eth_random_addr include/linux/etherdevice.h:232 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:752 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:802 [inline]
nsim_dev_trap_report_work+0x33a/0xbc0 drivers/net/netdevsim/dev.c:843
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 89 c2 mov %eax,%edx
2: 81 e2 00 01 00 00 and $0x100,%edx
8: a9 00 01 ff 00 test $0xff0100,%eax
d: 74 10 je 0x1f
f: 31 c0 xor %eax,%eax
11: 85 d2 test %edx,%edx
13: 74 15 je 0x2a
15: 8b 96 ac 15 00 00 mov 0x15ac(%rsi),%edx
1b: 85 d2 test %edx,%edx
1d: 74 0b je 0x2a
1f: 8b 86 88 15 00 00 mov 0x1588(%rsi),%eax
25: 39 f8 cmp %edi,%eax
27: 0f 94 c0 sete %al
* 2a: c3 retq <-- trapping instruction
2b: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
32: 00 00 00 00
36: 0f 1f 00 nopl (%rax)
39: 31 c0 xor %eax,%eax
3b: 65 gs
3c: 8b .byte 0x8b
3d: 15 .byte 0x15
3e: 67 addr32
3f: d0 .byte 0xd0