INFO: task syz-executor.3:11497 blocked for more than 143 seconds.
Not tainted 5.15.0-rc5-next-20211013-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:26392 pid:11497 ppid: 6563 flags:0x00024006
Call Trace:
context_switch kernel/sched/core.c:4965 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6246
schedule+0xd2/0x260 kernel/sched/core.c:6319
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
io_wq_exit_workers fs/io-wq.c:1177 [inline]
io_wq_put_and_exit+0x4b2/0xd20 fs/io-wq.c:1212
io_uring_clean_tctx fs/io_uring.c:9704 [inline]
io_uring_cancel_generic+0x61d/0x690 fs/io_uring.c:9785
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60e/0x2b40 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2160 kernel/signal.c:2833
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:863
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f98a394aa39
RSP: 002b:00007f98a0e9f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000002ff RBX: 00007f98a3a4e020 RCX: 00007f98a394aa39
RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000003
RBP: 00007f98a39a4c5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc144f3d7f R14: 00007f98a0e9f300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb82ea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc5-next-20211013-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: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: 2933 Comm: kworker/0:4 Not tainted 5.15.0-rc5-next-20211013-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:chacha_permute+0x54f/0x6e0 lib/crypto/chacha.c:62
Code: cb c1 c0 0c 45 01 cb 44 31 dd 31 de 44 89 5c 24 14 c1 c6 08 c1 c5 08 c1 c2 0c 41 01 f2 41 01 ef 89 74 24 2c 41 01 d0 44 31 d1 <45> 31 f9 44 89 54 24 18 44 89 44 24 0c c1 c1 07 45 31 c5 41 c1 c1
RSP: 0018:ffffc9000b45f9c0 EFLAGS: 00000082
RAX: 000000004c8f3490 RBX: 00000000efd7113a RCX: 00000000ddf68aa8
RDX: 00000000fa8a8c2b RSI: 0000000073b87add RDI: 000000005986481f
RBP: 000000005ccf114b R08: 00000000f17ebb47 R09: 00000000a06ecaee
R10: 00000000f34fe24a R11: 00000000157e5c5d R12: 000000001c31d77f
R13: 00000000650bb1c7 R14: 000000005470f295 R15: 000000008be32b04
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3b0a31e000 CR3: 0000000070176000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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:671 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:721 [inline]
nsim_dev_trap_report_work+0x34c/0xbd0 drivers/net/netdevsim/dev.c:762
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297
worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: cb lret
1: c1 c0 0c rol $0xc,%eax
4: 45 01 cb add %r9d,%r11d
7: 44 31 dd xor %r11d,%ebp
a: 31 de xor %ebx,%esi
c: 44 89 5c 24 14 mov %r11d,0x14(%rsp)
11: c1 c6 08 rol $0x8,%esi
14: c1 c5 08 rol $0x8,%ebp
17: c1 c2 0c rol $0xc,%edx
1a: 41 01 f2 add %esi,%r10d
1d: 41 01 ef add %ebp,%r15d
20: 89 74 24 2c mov %esi,0x2c(%rsp)
24: 41 01 d0 add %edx,%r8d
27: 44 31 d1 xor %r10d,%ecx
* 2a: 45 31 f9 xor %r15d,%r9d <-- trapping instruction
2d: 44 89 54 24 18 mov %r10d,0x18(%rsp)
32: 44 89 44 24 0c mov %r8d,0xc(%rsp)
37: c1 c1 07 rol $0x7,%ecx
3a: 45 31 c5 xor %r8d,%r13d
3d: 41 rex.B
3e: c1 .byte 0xc1
3f: c1 .byte 0xc1