rr dhcpcd[4892Oct 23 08:53:30 syzkaller daemonOct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 syzkaller daemon.err dhcpcd[4892Oct 23 08:53:30 Oct 23 08:53:30 syzkaller daemonOct 23 08:53:30 Oct 23 08:53:30 syzkaller daemon.err dhcpcd[4892]: libudev: receOct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 syzkaller daemonOct 23 08:53:30 Oct 23 08:53:30 syzkaller daemon.err dhcpcd[4892]: libudev: received NULL device
Oct 23 08:53:30 syzkaller daemon.err dhcpcd[4892]: libudev: received NULL device
Oct 23 08:53:30 syzkaller daemon.err dhcpcd[4892]: libudev: Oct 23 08:53:30 Oct 23 08:53:30 syzkaller daemon.err dhcpcd[4892Oct 23 08:53:30 Oct 23 08:53:30 syzkaller daemon.err dhcpcd[4892Oct 23 08:53:30 Oct 23 08:53:30 syzkaller daemonOct 23 08:53:30 syzkaller daemon.err dhcpcd[4892Oct 23 08:53:30 [  815.286751][   T30] INFO: task syz.4.1386:10892 blocked for more than 142 seconds.
Oct 23 08:53:30 [  815.295014][   T30]       Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 syzkaller daemonOct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 syzkaller daemon.err dhcpcd[4892]: libudev: received NULL device
Oct 23 08:53:3Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 Oct 23 08:53:30 syzkaller daemonOct 23 08:53:30 syzkaller daemon[  815.339302][   T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Oct 23 08:53:30 Oct 23 08:53:30 syzkaller daemonOct 23 08:53:30 [  815.351393][   T30] task:syz.4.1386      state:D stack:26320 pid:10892 tgid:10890 ppid:8505   flags:0x00004004
syzkaller daemon.err dhcpcd[4892[  815.852043][   T30] Sending NMI from CPU 0 to CPUs 1:
]: libudev: receOct 23 08:53:30 Oct 23 08:53:30 [  815.859161][    C1] NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 46 Comm: kworker/1:1 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:wg_ratelimiter_gc_entries+0xf2/0x520 drivers/net/wireguard/ratelimiter.c:64
Code: 24 0c 48 8b 2d cf 66 8d 14 48 c1 e0 03 48 01 c5 48 89 44 24 18 48 89 e8 48 c1 e8 03 80 3c 18 00 0f 85 fa 03 00 00 48 8b 6d 00 <48> 85 ed 74 77 e8 04 07 6a fb 48 83 ed 60 74 6c e8 f9 06 6a fb 48
RSP: 0018:ffffc90000b67c70 EFLAGS: 00000246
RAX: 1ffff1100f0a3d90 RBX: dffffc0000000000 RCX: ffffffff816b1a6d
RDX: 1ffffffff1e4e93a RSI: 0000000000000004 RDI: ffffc90000b67c00
RBP: 0000000000000000 R08: 0000000000000001 R09: fffff5200016cf80
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff8f274820 R14: 000000bdf26c620c R15: 0000000000001d90
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d916ff8 CR3: 000000007f210000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>