INFO: task syz-executor.0:22253 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28056 pid:22253 ppid: 31404 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
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:1204 [inline]
io_wq_put_and_exit+0x33a/0xb70 fs/io-wq.c:1239
io_uring_clean_tctx fs/io_uring.c:9774 [inline]
io_uring_cancel_generic+0x61d/0x690 fs/io_uring.c:9855
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2b40 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x21d0 kernel/signal.c:2820
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
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: 0033:0x7f09fe414ae9
RSP: 002b:00007f09fb969188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000001d3 RBX: 00007f09fe528020 RCX: 00007f09fe414ae9
RDX: 0000000000007276 RSI: 00000000000001d3 RDI: 0000000000000004
RBP: 00007f09fe46ef25 R08: 0000000000000000 R09: 0000000000009e2d
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc62a6f7cf R14: 00007f09fb969300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b983a20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6461
1 lock held by in:imklog/6166:
#0: ffff888075890ff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by agetty/6396:
#0: ffff888022f9f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002ae82e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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: 8354 Comm: kworker/0:4 Not tainted 5.15.0-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:rdrand_long arch/x86/include/asm/archrandom.h:25 [inline]
RIP: 0010:arch_get_random_long arch/x86/include/asm/archrandom.h:75 [inline]
RIP: 0010:arch_get_random_long arch/x86/include/asm/archrandom.h:73 [inline]
RIP: 0010:_extract_crng+0xee/0x250 drivers/char/random.c:998
Code: 3d fd 4c 8d 7d 48 4c 89 ff e8 9e 83 01 05 48 89 04 24 0f 1f 44 00 00 e8 50 36 3d fd bb 0a 00 00 00 e8 46 36 3d fd 49 0f c7 f4 <41> 0f 92 c5 31 ff 44 89 ee e8 74 3c 3d fd 45 84 ed 0f 85 e6 00 00
RSP: 0018:ffffc90017b67b20 EFLAGS: 00000003
RAX: 0000000000000000 RBX: 000000000000000a RCX: 0000000000000000
RDX: ffff88807a380000 RSI: ffffffff843a8e6a RDI: ffffc90017b67a90
RBP: ffff888010daef00 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52002f6cf52 R11: 0000000000000000 R12: 106218bc794e0684
R13: ffffc90017b67ba8 R14: ffffc90017b67ba8 R15: ffff888010daef48
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff70dc50000 CR3: 000000007b03b000 CR4: 0000000000350ef0
Call Trace:
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: 3d fd 4c 8d 7d cmp $0x7d8d4cfd,%eax
5: 48 rex.W
6: 4c 89 ff mov %r15,%rdi
9: e8 9e 83 01 05 callq 0x50183ac
e: 48 89 04 24 mov %rax,(%rsp)
12: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
17: e8 50 36 3d fd callq 0xfd3d366c
1c: bb 0a 00 00 00 mov $0xa,%ebx
21: e8 46 36 3d fd callq 0xfd3d366c
26: 49 0f c7 f4 rdrand %r12
* 2a: 41 0f 92 c5 setb %r13b <-- trapping instruction
2e: 31 ff xor %edi,%edi
30: 44 89 ee mov %r13d,%esi
33: e8 74 3c 3d fd callq 0xfd3d3cac
38: 45 84 ed test %r13b,%r13b
3b: 0f .byte 0xf
3c: 85 e6 test %esp,%esi