syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.3.3269:12929]
Modules linked in:
CPU: 1 PID: 12929 Comm: syz.3.3269 Tainted: G        W         5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:dst_set_expires include/net/dst.h:431 [inline]
RIP: 0010:ipv4_link_failure+0x4ae/0x720 net/ipv4/route.c:1258
Code: 83 d7 00 48 83 c3 18 49 89 dc 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df 41 80 3c 04 00 74 08 48 89 df e8 95 3d 09 fe 4c 8b 33 <31> ff 4c 89 f6 e8 28 47 db fd 4d 85 f6 41 0f 94 c5 4c 89 fe 4c 29
RSP: 0000:ffff8881f6f09ac0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffff8881e22d3e18 RCX: dffffc0000000000
RDX: ffff8881d537ee40 RSI: ffff8881e22d3e00 RDI: 0000000000000000
RBP: ffff8881f6f09bc0 R08: ffff8881d537ee40 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000301 R12: 1ffff1103c45a7c3
R13: ffff8881ca481900 R14: 000000010000b4c7 R15: 000000010000b7a9
FS:  00007fa9d26456c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e31eff8 CR3: 00000001c9c53000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 dst_link_failure include/net/dst.h:421 [inline]
 arp_error_report+0x9b/0xc0 net/ipv4/arp.c:295
 neigh_invalidate+0x24c/0x470 net/core/neighbour.c:1006
 neigh_timer_handler+0x885/0xf40 net/core/neighbour.c:1092
 call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x81d/0xb60 kernel/time/timer.c:1817
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x236/0x660 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x197/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0033:0x7fa9d3ea2207
Code: 83 c4 08 c3 0f 1f 80 00 00 00 00 48 83 ec 08 48 89 f2 48 63 ff 4c 89 d6 41 51 31 c0 4d 89 c1 49 89 c8 4c 89 d9 e8 49 a7 13 00 <5a> 59 48 83 c4 08 c3 66 90 41 57 41 56 41 55 49 89 f5 41 54 49 29
RSP: 002b:00007fa9d2645040 EFLAGS: 00000207 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000006 RBX: 00007fa9d4203fa0 RCX: 00007fa9d3fdc969
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007fa9d405eab1 R08: 0000000000000003 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa9d4203fa0 R15: 00007fff617507d8
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G        W         5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:109 [inline]
RIP: 0010:smp_call_function_single+0x1da/0x410 kernel/smp.c:311
Code: 5c 02 00 00 89 c3 44 8b 74 24 58 44 89 f6 83 e6 01 31 ff e8 b8 51 0a 00 41 83 e6 01 75 0a e8 5d 4e 0a 00 e9 a6 00 00 00 f3 90 <f7> 44 24 58 01 00 00 00 0f 84 91 00 00 00 e8 43 4e 0a 00 eb e9 e8
RSP: 0018:ffff8881f5db77e0 EFLAGS: 00000293
RAX: ffffffff8155309d RBX: 0000000000000000 RCX: ffff8881f5d6bf00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff8881f5db78d0 R08: dffffc0000000000 R09: ffffed103edeb189
R10: ffffed103edeb189 R11: 1ffff1103edeb188 R12: ffff8881f5db7820
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff1103ebb6f00
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe0906acae8 CR3: 0000000005c0e000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 smp_call_function_many+0x6d6/0x990 kernel/smp.c:451
 smp_call_function kernel/smp.c:509 [inline]
 on_each_cpu+0xa8/0x170 kernel/smp.c:616
 text_poke_bp_batch+0xf7/0x260 arch/x86/kernel/alternative.c:1051
 arch_jump_label_transform_apply+0x2b/0x50 arch/x86/kernel/jump_label.c:167
 __jump_label_update+0x37c/0x3a0 kernel/jump_label.c:449
 jump_label_update+0x34c/0x3e0 kernel/jump_label.c:808
 static_key_disable_cpuslocked+0xc5/0x1a0 kernel/jump_label.c:207
 static_key_disable+0x1a/0x30 kernel/jump_label.c:215
 toggle_allocation_gate+0x196/0x230 mm/kfence/core.c:638
 process_one_work+0x73b/0xcc0 kernel/workqueue.c:2290
 worker_thread+0xa5c/0x13b0 kernel/workqueue.c:2436
 kthread+0x31e/0x3a0 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354