rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=0694/1/0x4000000000000000 softirq=20968/20969 fqs=5244
rcu: hardirqs softirqs csw/system
rcu: number: 1055878 0 0
rcu: cputime: 15799 36700 20 ==> 52520(ms)
rcu: (t=10503 jiffies g=22281 q=5205 ncpus=2)
CPU: 0 PID: 7946 Comm: syz.0.488 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0x142/0x1c0 kernel/softirq.c:413
Code: 8a e8 02 04 3d 09 65 66 8b 05 7a db b0 7e 66 85 c0 75 54 bf 01 00 00 00 e8 2b 1d 0a 00 e8 e6 16 3b 00 fb 65 8b 05 46 db b0 7e <85> c0 75 05 e8 35 c0 ad ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc90000007320 EFLAGS: 00000282
RAX: 0000000000000101 RBX: 0000000000000200 RCX: 815abc5792a12500
RDX: dffffc0000000000 RSI: ffffffff8acacce0 RDI: ffffffff8b1d35e0
RBP: ffffc900000073b0 R08: ffffffff911ef5f7 R09: 1ffffffff223debe
R10: dffffc0000000000 R11: fffffbfff223debf R12: ffffffff895bb6bb
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000000e64
FS: 00007f8a410726c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa9a2e7cff8 CR3: 000000002c355000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
local_bh_enable include/linux/bottom_half.h:33 [inline]
ip6t_do_table+0x13c4/0x1570 net/ipv6/netfilter/ip6_tables.c:375
ip6table_mangle_hook+0x2a8/0x700 net/ipv6/netfilter/ip6table_mangle.c:72
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook+0x228/0x390 include/linux/netfilter.h:259
NF_HOOK_COND include/linux/netfilter.h:292 [inline]
ip6_output+0x277/0x3c0 net/ipv6/ip6_output.c:242
dst_output include/net/dst.h:467 [inline]
NF_HOOK include/linux/netfilter.h:304 [inline]
ndisc_send_skb+0xbb9/0x1480 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x36b/0x640 net/ipv6/addrconf.c:4036
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x570/0x810 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x27d/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 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:preempt_schedule_irq+0xba/0x150 kernel/sched/core.c:7011
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 6f bf 01 00 00 00 e8 a1 db c4 f6 e8 fc d6 f5 f6 fb bf 01 00 00 00 31 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc900035cfd60 EFLAGS: 00000286
RAX: 815abc5792a12500 RBX: 0000000000000000 RCX: 815abc5792a12500
RDX: dffffc0000000000 RSI: ffffffff8acacce0 RDI: 0000000000000001
RBP: ffffc900035cfe10 R08: ffffffff8e8c8daf R09: 1ffffffff1d191b5
R10: dffffc0000000000 R11: fffffbfff1d191b6 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920006b9fac
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:exit_to_user_mode_loop+0x40/0x110 kernel/entry/common.c:164
Code: fb eb 1d e8 82 a8 1b 09 65 48 8b 05 0a 81 8f 7e 4c 8b 30 41 f7 c6 0e 30 02 00 0f 84 c4 00 00 00 e8 95 bc 19 00 fb 41 f6 c6 08 <74> 05 e8 29 e0 23 09 41 f7 c6 00 10 00 00 74 08 48 89 df e8 88 af
RSP: 0018:ffffc900035cfed0 EFLAGS: 00000246
RAX: 815abc5792a12500 RBX: ffffc900035cff58 RCX: 815abc5792a12500
RDX: dffffc0000000000 RSI: ffffffff8acacce0 RDI: ffffffff8b1d35e0
RBP: ffffc900035cff48 R08: ffffffff8e8c8daf R09: 1ffffffff1d191b5
R10: dffffc0000000000 R11: fffffbfff1d191b6 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000004002 R15: ffff88802b788000
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8a4019e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8a41072028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 000000000000001b RBX: 00007f8a40426270 RCX: 00007f8a4019e159
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f8a40235024 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8a40426308 R14: 00007f8a40426270 R15: 00007ffdaf93ce68