rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (9397 ticks this GP) idle=3c64/1/0x4000000000000000 softirq=43200/43237 fqs=507
rcu: hardirqs softirqs csw/system
rcu: number: 2105833 120 0
rcu: cputime: 37390 15015 17 ==> 52410(ms)
rcu: (t=10500 jiffies g=45593 q=1027 ncpus=2)
CPU: 0 PID: 9668 Comm: syz.2.862 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:seqcount_lockdep_reader_access+0x39/0x1c0 include/linux/seqlock.h:97
Code: 48 83 e4 e0 48 81 ec 80 00 00 00 65 48 8b 04 25 28 00 00 00 48 89 44 24 68 48 c7 04 24 b3 8a b5 41 48 c7 44 24 08 76 c4 7a 8c <48> c7 44 24 10 d0 fe 75 81 49 89 e6 49 c1 ee 03 48 b8 f1 f1 f1 f1
RSP: 0018:ffffc90000006400 EFLAGS: 00000286
RAX: f066e6e800a87300 RBX: ffffffff8aacb5e0 RCX: ffff8880210e9e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900000064b8 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: dffffc0000000000
R13: 1ffff92000000ca8 R14: ffffffff8cd49a48 R15: 0000000000000000
FS: 00007fbbf8bf06c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000d000 CR3: 000000001cb0c000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
ktime_get_with_offset+0x94/0x330 kernel/time/timekeeping.c:889
ktime_get_real include/linux/timekeeping.h:79 [inline]
netif_rx_internal+0x34a/0x4e0 net/core/dev.c:5115
__netif_rx+0x78/0xc0 net/core/dev.c:5158
veth_forward_skb drivers/net/veth.c:321 [inline]
veth_xmit+0x550/0x9f0 drivers/net/veth.c:374
__netdev_start_xmit include/linux/netdevice.h:4943 [inline]
netdev_start_xmit include/linux/netdevice.h:4957 [inline]
xmit_one net/core/dev.c:3619 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3635
__dev_queue_xmit+0x1a64/0x35a0 net/core/dev.c:4425
dev_queue_xmit include/linux/netdevice.h:3113 [inline]
br_dev_queue_push_xmit+0x6a6/0x850 net/bridge/br_forward.c:53
NF_HOOK+0x613/0x6a0 include/linux/netfilter.h:304
br_nf_post_routing+0xb41/0xfb0 net/bridge/br_netfilter_hooks.c:977
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:259 [inline]
NF_HOOK+0x213/0x3d0 include/linux/netfilter.h:302
br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:66
br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:-1 [inline]
br_nf_forward_finish+0xa33/0xe50 net/bridge/br_netfilter_hooks.c:684
NF_HOOK+0x613/0x6a0 include/linux/netfilter.h:304
br_nf_forward_ip+0xcc1/0x1110 net/bridge/br_netfilter_hooks.c:754
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:259 [inline]
NF_HOOK+0x213/0x3d0 include/linux/netfilter.h:302
__br_forward+0x41f/0x600 net/bridge/br_forward.c:115
br_handle_frame_finish+0x143d/0x1950 net/bridge/br_input.c:215
br_nf_hook_thresh+0x3b6/0x480 net/bridge/br_netfilter_hooks.c:1184
br_nf_pre_routing_finish_ipv6+0x9e3/0xd90 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:304 [inline]
br_nf_pre_routing_ipv6+0x34d/0x680 net/bridge/br_netfilter_ipv6.c:184
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x957/0x14c0 net/bridge/br_input.c:424
__netif_receive_skb_core+0xf6b/0x3ac0 net/core/dev.c:5502
__netif_receive_skb_one_core net/core/dev.c:5606 [inline]
__netif_receive_skb+0x74/0x290 net/core/dev.c:5722
process_backlog+0x380/0x6e0 net/core/dev.c:6050
__napi_poll+0xc0/0x460 net/core/dev.c:6612
napi_poll net/core/dev.c:6679 [inline]
net_rx_action+0x5ea/0xbf0 net/core/dev.c:6815
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:finish_task_switch+0x26a/0x920 kernel/sched/core.c:5254
Code: 0f 84 37 01 00 00 48 85 db 0f 85 56 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 80 ca 14 09 e8 4b a4 2f 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90010147338 EFLAGS: 00000282
RAX: f066e6e800a87300 RBX: 0000000000000000 RCX: f066e6e800a87300
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: ffffffff8afc6f80
RBP: ffffc90010147390 R08: ffffffff90d9452f R09: 1ffffffff21b28a5
R10: dffffc0000000000 R11: fffffbfff21b28a6 R12: ffff8880210e9e00
R13: dffffc0000000000 R14: ffff8880182d8000 R15: ffff8880b8e3cac8
context_switch kernel/sched/core.c:5383 [inline]
__schedule+0x14da/0x44d0 kernel/sched/core.c:6699
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6866
preempt_schedule+0xab/0xc0 kernel/sched/core.c:6890
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0xfa/0x110 kernel/locking/spinlock.c:194
__debug_check_no_obj_freed lib/debugobjects.c:999 [inline]
debug_check_no_obj_freed+0x51f/0x540 lib/debugobjects.c:1020
free_pages_prepare mm/page_alloc.c:1160 [inline]
free_unref_page_prepare+0x1de/0x8e0 mm/page_alloc.c:2336
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429
discard_slab mm/slub.c:2127 [inline]
__unfreeze_partials+0x1cf/0x210 mm/slub.c:2667
put_cpu_partial+0x17c/0x250 mm/slub.c:2743
__slab_free+0x31d/0x410 mm/slub.c:3700
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
__kmem_cache_alloc_node+0x13e/0x260 mm/slub.c:3534
kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098
kmalloc include/linux/slab.h:600 [inline]
kzalloc include/linux/slab.h:721 [inline]
bpf_prog_alloc_no_stats+0xd8/0x440 kernel/bpf/core.c:102
bpf_prog_alloc+0x3d/0x1b0 kernel/bpf/core.c:136
bpf_prog_load+0x6b8/0x16d0 kernel/bpf/syscall.c:2681
__sys_bpf+0x55a/0x800 kernel/bpf/syscall.c:5473
__do_sys_bpf kernel/bpf/syscall.c:5577 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5575 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5575
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fbbf7d8f749
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:00007fbbf8bf0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fbbf7fe5fa0 RCX: 00007fbbf7d8f749
RDX: 0000000000000094 RSI: 0000200000000e40 RDI: 0000000000000005
RBP: 00007fbbf7e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbbf7fe6038 R14: 00007fbbf7fe5fa0 R15: 00007ffcf9ee5488