INFO: task syz-executor.5:11059 blocked for more than 143 seconds.
Not tainted 5.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:24432 pid:11059 ppid: 6827 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
io_uring_cancel_generic+0x5b3/0x661 fs/io_uring.c:9877
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x281/0x24f0 kernel/exit.c:787
do_group_exit+0x168/0x2d0 kernel/exit.c:929
get_signal+0x1740/0x2120 kernel/signal.c:2852
arch_do_signal_or_restart+0x9c/0x730 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+0x191/0x220 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0f84f2bae9
RSP: 002b:00007f0f824a1218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f0f8503ef68 RCX: 00007f0f84f2bae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0f8503ef68
RBP: 00007f0f8503ef60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0f8503ef6c
R13: 00007ffc25e4870f R14: 00007f0f824a1300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8cb1db40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by in:imklog/6196:
#0: ffff88801cdc94f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc3-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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 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+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8022 Comm: kworker/0:5 Not tainted 5.16.0-rc3-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:_extract_crng+0x10c/0x350 drivers/char/random.c:998
Code: 44 f0 4c 89 ef e8 54 f1 ff ff 4d 8d 7d 48 4c 89 ff e8 f8 78 74 05 48 89 04 24 0f 1f 44 00 00 e8 3a 2f e4 fc 31 f6 49 0f c7 f6 <0f> 93 c3 40 0f 92 c6 31 ff e8 f6 31 e4 fc 84 db 0f 84 f3 00 00 00
RSP: 0000:ffffc9000b967a20 EFLAGS: 00000003
RAX: ffffffff84a058f6 RBX: 0000000100007548 RCX: ffff888079e30000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000b967900
RBP: ffffc9000b967aa0 R08: dffffc0000000000 R09: 0000000000000003
R10: fffff5200172cf21 R11: 0000000000000004 R12: dffffc0000000000
R13: ffff8880115b8e00 R14: 8b3fce32251a3d8c R15: ffff8880115b8e48
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb76b3da010 CR3: 000000001be3c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
extract_crng drivers/char/random.c:1016 [inline]
_get_random_bytes+0x1b6/0x230 drivers/char/random.c:1538
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:773 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:802 [inline]
nsim_dev_trap_report_work+0x683/0xaf0 drivers/net/netdevsim/dev.c:843
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 44 rex.R
1: f0 4c 89 ef lock mov %r13,%rdi
5: e8 54 f1 ff ff callq 0xfffff15e
a: 4d 8d 7d 48 lea 0x48(%r13),%r15
e: 4c 89 ff mov %r15,%rdi
11: e8 f8 78 74 05 callq 0x574790e
16: 48 89 04 24 mov %rax,(%rsp)
1a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1f: e8 3a 2f e4 fc callq 0xfce42f5e
24: 31 f6 xor %esi,%esi
26: 49 0f c7 f6 rdrand %r14
* 2a: 0f 93 c3 setae %bl <-- trapping instruction
2d: 40 0f 92 c6 setb %sil
31: 31 ff xor %edi,%edi
33: e8 f6 31 e4 fc callq 0xfce4322e
38: 84 db test %bl,%bl
3a: 0f 84 f3 00 00 00 je 0x133