syzbot


INFO: rcu detected stall in neigh_add

Status: upstream: reported on 2025/09/01 19:38
Reported-by: syzbot+d5ecfe2581aaf14b91ba@syzkaller.appspotmail.com
First crash: 9h18m, last: 9h18m

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (4 ticks this GP) idle=a1d/1/0x4000000000000000 softirq=10153/10153 fqs=7 
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4248/1:b..l
	(detected by 1, t=10502 jiffies, g=14045, q=106)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5509 Comm: syz.3.360 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__rcu_read_unlock+0x0/0xd0 kernel/rcu/tree_plugin.h:415
Code: c0 75 11 ff 03 8b 03 3d 00 00 00 40 7d 02 5b c3 0f 0b eb fa 89 d9 80 e1 07 80 c1 03 38 c1 7c e3 48 89 df e8 32 d6 57 00 eb d9 <41> 57 41 56 41 55 41 54 53 49 bf 00 00 00 00 00 fc ff df 65 48 8b
RSP: 0018:ffffc90000007c78 EFLAGS: 00000006
RAX: ffffffff880922ce RBX: 0000000000000001 RCX: ffff88807bb39dc0
RDX: 0000000000010000 RSI: ffffffff8a59a220 RDI: ffffffff8a59a1e0
RBP: ffff88805e82eb60 R08: dffffc0000000000 R09: ffffed100bd05d32
R10: ffffed100bd05d32 R11: 1ffff1100bd05d31 R12: ffff88805e82eae8
R13: dffffc0000000000 R14: ffff88805e82e800 R15: 1869e9f61c000000
FS:  00007fde984686c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001c40 CR3: 0000000059d74000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 advance_sched+0x7cb/0x940 net/sched/sch_taprio.c:771
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:console_unlock+0xd90/0x1200 kernel/printk/printk.c:2749
Code: 00 48 83 7c 24 28 00 75 19 e8 dc 94 18 00 eb 18 e8 d5 94 18 00 e8 00 b8 49 08 48 83 7c 24 28 00 74 e7 e8 c3 94 18 00 fb 31 ff <89> de e8 19 98 18 00 85 db 0f 94 c0 22 44 24 17 3c 01 75 1f e8 a7
RSP: 0018:ffffc90003deed20 EFLAGS: 00000246
RAX: ffffffff815f35ed RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000e059000 RSI: 0000000000002029 RDI: 0000000000000000
RBP: ffffc90003deef90 R08: dffffc0000000000 R09: fffffbfff1ff7619
R10: fffffbfff1ff7619 R11: 1ffffffff1ff7618 R12: 1ffffffff194c635
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffffffff194c62e
 vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274
 _printk+0xcc/0x110 kernel/printk/printk.c:2299
 __nla_validate_parse+0x1f2d/0x2750 lib/nlattr.c:603
 __nla_parse+0x3c/0x50 lib/nlattr.c:688
 __nlmsg_parse include/net/netlink.h:733 [inline]
 nlmsg_parse_deprecated include/net/netlink.h:772 [inline]
 neigh_add+0x1a9/0xcb0 net/core/neighbour.c:1879
 rtnetlink_rcv_msg+0x9b9/0xe60 net/core/rtnetlink.c:5650
 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2507
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ab/0xbc0 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
 __sys_sendmsg net/socket.c:2519 [inline]
 __do_sys_sendmsg net/socket.c:2528 [inline]
 __se_sys_sendmsg+0x190/0x250 net/socket.c:2526
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fde9a200be9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fde98468038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fde9a437fa0 RCX: 00007fde9a200be9
RDX: 0000000000040000 RSI: 0000200000000940 RDI: 0000000000000003
RBP: 00007fde9a283e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fde9a438038 R14: 00007fde9a437fa0 R15: 00007ffc41e57838
 </TASK>
task:kworker/0:4     state:R  running task     stack:25376 pid: 4248 ppid:     2 flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 kernel/sched/core.c:6395
 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:681
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:202
Code: 66 2e 0f 1f 84 00 00 00 00 00 53 48 89 fb e8 17 00 00 00 48 8b 3d 30 c4 f1 0b 48 89 de 5b e9 67 9c 43 00 00 00 cc cc 00 00 cc <48> 8b 04 24 65 48 8b 0d 04 a5 8a 7e 65 8b 15 05 a5 8a 7e 81 e2 00
RSP: 0018:ffffc9000322fad8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff88802b3ca3a8 RCX: ffff8880221d0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000322fc30 R08: dffffc0000000000 R09: fffffbfff1ff762c
R10: fffffbfff1ff762c R11: 1ffffffff1ff762b R12: dffffc0000000000
R13: ffff888016a57080 R14: 00000000000728eb R15: 0000000000040000
 gc_worker+0xbc2/0x13a0 net/netfilter/nf_conntrack_core.c:1478
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: rcu_preempt kthread starved for 10488 jiffies! g14045 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:28032 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x29e/0x11b0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x98/0x350 kernel/rcu/tree.c:2145
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 4239 Comm: kworker/1:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events bpf_prog_free_deferred
Call Trace:
 <IRQ>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_check_gp_kthread_starvation+0x1cd/0x250 kernel/rcu/tree_stall.h:487
 print_other_cpu_stall+0x10c8/0x1220 kernel/rcu/tree_stall.h:592
 check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
 rcu_pending kernel/rcu/tree.c:3936 [inline]
 rcu_sched_clock_irq+0x831/0x1110 kernel/rcu/tree.c:2619
 update_process_times+0x193/0x200 kernel/time/timer.c:1818
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x4fe/0xc40 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0xb88/0xd70 kernel/smp.c:969
Code: b6 44 05 00 84 c0 0f 85 9d 00 00 00 41 8b 1c 24 89 de 83 e6 01 31 ff e8 66 49 0b 00 83 e3 01 75 07 e8 fc 45 0b 00 eb 43 f3 90 <48> b8 00 00 00 00 00 fc ff df 41 0f b6 44 05 00 84 c0 75 11 41 f7
RSP: 0018:ffffc9000319f840 EFLAGS: 00000293
RAX: ffffffff816c84db RBX: 0000000000000001 RCX: ffff8880256fbb80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000319f980 R08: dffffc0000000000 R09: fffffbfff1ff761a
R10: fffffbfff1ff761a R11: 1ffffffff1ff7619 R12: ffff8880b9042a08
R13: 1ffff11017208541 R14: ffff8880b913b380 R15: 0000000000000000
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
 __purge_vmap_area_lazy+0x216/0x18f0 mm/vmalloc.c:1690
 _vm_unmap_aliases+0x410/0x4a0 mm/vmalloc.c:2114
 vm_remove_mappings mm/vmalloc.c:2591 [inline]
 __vunmap+0x70d/0xa40 mm/vmalloc.c:2618
 bpf_jit_binary_free kernel/bpf/core.c:918 [inline]
 bpf_jit_free+0x92/0x180 kernel/bpf/core.c:931
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
watchdog: BUG: soft lockup - CPU#1 stuck for 262s! [kworker/1:6:4239]
Modules linked in:
irq event stamp: 388846
hardirqs last  enabled at (388845): [<ffffffff89c00d06>] asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
hardirqs last disabled at (388846): [<ffffffff89a8e73a>] sysvec_apic_timer_interrupt+0xa/0xc0 arch/x86/kernel/apic/apic.c:1108
softirqs last  enabled at (236892): [<ffffffff8148800f>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last  enabled at (236892): [<ffffffff8148800f>] invoke_softirq kernel/softirq.c:450 [inline]
softirqs last  enabled at (236892): [<ffffffff8148800f>] __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
softirqs last disabled at (236839): [<ffffffff8148800f>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (236839): [<ffffffff8148800f>] invoke_softirq kernel/softirq.c:450 [inline]
softirqs last disabled at (236839): [<ffffffff8148800f>] __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
CPU: 1 PID: 4239 Comm: kworker/1:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events bpf_prog_free_deferred
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0xb88/0xd70 kernel/smp.c:969
Code: b6 44 05 00 84 c0 0f 85 9d 00 00 00 41 8b 1c 24 89 de 83 e6 01 31 ff e8 66 49 0b 00 83 e3 01 75 07 e8 fc 45 0b 00 eb 43 f3 90 <48> b8 00 00 00 00 00 fc ff df 41 0f b6 44 05 00 84 c0 75 11 41 f7
RSP: 0018:ffffc9000319f840 EFLAGS: 00000293
RAX: ffffffff816c84db RBX: 0000000000000001 RCX: ffff8880256fbb80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000319f980 R08: dffffc0000000000 R09: fffffbfff1ff761a
R10: fffffbfff1ff761a R11: 1ffffffff1ff7619 R12: ffff8880b9042a08
R13: 1ffff11017208541 R14: ffff8880b913b380 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f990ba526c0 CR3: 0000000062037000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
 __purge_vmap_area_lazy+0x216/0x18f0 mm/vmalloc.c:1690
 _vm_unmap_aliases+0x410/0x4a0 mm/vmalloc.c:2114
 vm_remove_mappings mm/vmalloc.c:2591 [inline]
 __vunmap+0x70d/0xa40 mm/vmalloc.c:2618
 bpf_jit_binary_free kernel/bpf/core.c:918 [inline]
 bpf_jit_free+0x92/0x180 kernel/bpf/core.c:931
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5509 Comm: syz.3.360 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__lock_acquire+0x383/0x7c60 kernel/locking/lockdep.c:4946
Code: 0b 00 00 48 89 4c 24 18 48 c1 e9 03 48 89 4c 24 58 42 0f b6 04 01 84 c0 0f 85 10 63 00 00 4c 8b 7d 18 48 89 54 24 60 41 89 d6 <b8> 00 e0 ff ff 41 23 44 24 20 41 81 e6 ff 1f 00 00 44 09 f0 41 89
RSP: 0018:ffffc900000078c0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff8c11c460 RCX: 1ffff1100f767524
RDX: 0000000000000015 RSI: 0000000000000000 RDI: ffffffff8c11c460
RBP: ffffc90000007b10 R08: dffffc0000000000 R09: 0000000000000001
R10: fffffbfff1ad3196 R11: 1ffffffff1ad3195 R12: ffff88807bb3a900
R13: 0000000000000000 R14: 0000000000000015 R15: ffffffff88091985
FS:  00007fde984686c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001c40 CR3: 0000000059d74000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
 rcu_read_lock include/linux/rcupdate.h:739 [inline]
 advance_sched+0x6ca/0x940 net/sched/sch_taprio.c:769
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:console_unlock+0xd90/0x1200 kernel/printk/printk.c:2749
Code: 00 48 83 7c 24 28 00 75 19 e8 dc 94 18 00 eb 18 e8 d5 94 18 00 e8 00 b8 49 08 48 83 7c 24 28 00 74 e7 e8 c3 94 18 00 fb 31 ff <89> de e8 19 98 18 00 85 db 0f 94 c0 22 44 24 17 3c 01 75 1f e8 a7
RSP: 0018:ffffc90003deed20 EFLAGS: 00000246
RAX: ffffffff815f35ed RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000e059000 RSI: 0000000000002029 RDI: 0000000000000000
RBP: ffffc90003deef90 R08: dffffc0000000000 R09: fffffbfff1ff7619
R10: fffffbfff1ff7619 R11: 1ffffffff1ff7618 R12: 1ffffffff194c635
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffffffff194c62e
 vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274
 _printk+0xcc/0x110 kernel/printk/printk.c:2299
 __nla_validate_parse+0x1f2d/0x2750 lib/nlattr.c:603
 __nla_parse+0x3c/0x50 lib/nlattr.c:688
 __nlmsg_parse include/net/netlink.h:733 [inline]
 nlmsg_parse_deprecated include/net/netlink.h:772 [inline]
 neigh_add+0x1a9/0xcb0 net/core/neighbour.c:1879
 rtnetlink_rcv_msg+0x9b9/0xe60 net/core/rtnetlink.c:5650
 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2507
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ab/0xbc0 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
 __sys_sendmsg net/socket.c:2519 [inline]
 __do_sys_sendmsg net/socket.c:2528 [inline]
 __se_sys_sendmsg+0x190/0x250 net/socket.c:2526
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fde9a200be9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fde98468038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fde9a437fa0 RCX: 00007fde9a200be9
RDX: 0000000000040000 RSI: 0000200000000940 RDI: 0000000000000003
RBP: 00007fde9a283e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fde9a438038 R14: 00007fde9a437fa0 R15: 00007ffc41e57838
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/01 19:38 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in neigh_add
* Struck through repros no longer work on HEAD.