[v6.1] INFO: rcu detected stall in addrconf_rs_timer

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 4078fa637fcd Linux 6.1.91
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16f02784980000
kernel config: https://syzkaller.appspot.com/x/.config?x=715ba80acfd3def4
dashboard link: https://syzkaller.appspot.com/bug?extid=8c2bd9d58eb3944b2c1b
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/20c616b95c1f/disk-4078fa63.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/78c98fa5c5a9/vmlinux-4078fa63.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5dcdafdbe940/bzImage-4078fa63.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8c2bd9...@syzkaller.appspotmail.com

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 3469 jiffies s: 3225 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4420 Comm: syz-executor.4 Not tainted 6.1.91-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:235 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x4/0x80 kernel/kcov.c:311
Code: 89 f8 89 f6 49 ff c2 4c 89 11 48 c7 44 0a 08 05 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 c3 0f 1f 00 4c 8b 04 24 <65> 48 8b 0d 04 de 77 7e 65 8b 05 05 de 77 7e a9 00 01 ff 00 74 10
RSP: 0018:ffffc90000006bb8 EFLAGS: 00000046
RAX: ffffffff81b0093e RBX: 0000000000000000 RCX: ffff8880222c5940
RDX: 0000000000010103 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000006cb0 R08: ffffffff81b0094f R09: fffffbfff2093845
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc90000006d66 R14: 0000000000000000 R15: ffffc90000006ec0
FS: 00007f576f4346c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc882d5690 CR3: 00000000602d7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
perf_prepare_sample+0xe0f/0x1fb0 kernel/events/core.c:7558
__perf_event_output kernel/events/core.c:7655 [inline]
perf_event_output_forward+0x1b7/0x330 kernel/events/core.c:7675
__perf_event_overflow+0x45e/0x640 kernel/events/core.c:9423
perf_swevent_hrtimer+0x38e/0x4f0 kernel/events/core.c:10831
__run_hrtimer kernel/time/hrtimer.c:1686 [inline]
__hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1750
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:deref_stack_reg+0x1a8/0x210 arch/x86/kernel/unwind_orc.c:362
Code: c6 48 8b 6c 24 18 48 89 e8 48 c1 e8 03 80 3c 18 00 74 08 48 89 ef e8 e7 45 a5 00 4c 89 75 00 b0 01 48 83 c4 20 5b 41 5c 41 5d <41> 5e 41 5f 5d c3 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c df fe ff
RSP: 0018:ffffc90000007400 EFLAGS: 00000286
RAX: 1ffff92000000e01 RBX: ffffffff8f612100 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffc90000000000 RDI: ffffc900000079e0
RBP: ffffc90000007540 R08: ffffc900000079e0 R09: ffffc90000007550
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000007500
R13: ffffffff8f612102 R14: ffff888028fc4140 R15: ffffc90000008000
unwind_next_frame+0x18db/0x2220
arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
kmem_cache_alloc_node+0x136/0x310 mm/slub.c:3443
__alloc_skb+0xde/0x670 net/core/skbuff.c:505
alloc_skb include/linux/skbuff.h:1271 [inline]
ndisc_alloc_skb+0xee/0x2c0 net/ipv6/ndisc.c:422
ndisc_send_rs+0x269/0x6a0 net/ipv6/ndisc.c:703
addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3962
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1549 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__sprint_symbol+0xdd/0x3c0 kernel/kallsyms.c:517
Code: 00 4c 89 74 24 10 4c 8d ac 24 a0 00 00 00 48 c7 44 24 60 00 00 00 00 48 8d bc 24 80 00 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 <74> 05 e8 dc 2f 62 00 48 8d 84 24 c0 00 00 00 48 c7 84 24 80 00 00
RSP: 0018:ffffc9000a4570a0 EFLAGS: 00000246
RAX: 1ffff9200148ae24 RBX: dffffc0000000000 RCX: 0000000000040000
RDX: ffffc900054d2000 RSI: 000000000002fc88 RDI: ffffc9000a457120
RBP: ffffc9000a4571d0 R08: ffffffff8a85ea76 R09: ffffffff8a85ea16
R10: 0000000000000003 R11: ffff8880222c5940 R12: ffffffff860bffff
R13: ffffc9000a457140 R14: ffffc9000a457240 R15: 1ffff9200148ae1c
symbol_string+0x18d/0x3b0 lib/vsprintf.c:1000
pointer+0x7a2/0x1000 lib/vsprintf.c:2403
vsnprintf+0xe5b/0x1c70 lib/vsprintf.c:2809
snprintf+0xd6/0x120 lib/vsprintf.c:2940
bpf_bprintf_prepare+0xb6e/0x1450 kernel/bpf/helpers.c:894
____bpf_snprintf kernel/bpf/helpers.c:1050 [inline]
bpf_snprintf+0x15b/0x260 kernel/bpf/helpers.c:1034
bpf_prog_f2f741945f01d4c6+0x50/0x54
bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline]
__bpf_prog_run include/linux/filter.h:603 [inline]
bpf_prog_run include/linux/filter.h:610 [inline]
bpf_prog_run_pin_on_cpu include/linux/filter.h:627 [inline]
bpf_flow_dissect+0x12d/0x370 net/core/flow_dissector.c:913
bpf_prog_test_run_flow_dissector+0x465/0x7e0 net/bpf/test_run.c:1481
bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3670
__sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:5023
__do_sys_bpf kernel/bpf/syscall.c:5109 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5107 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5107
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f576e67cee9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f576f4340c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f576e7abf80 RCX: 00007f576e67cee9
RDX: 0000000000000050 RSI: 0000000020000640 RDI: 000000000000000a
RBP: 00007f576e6c949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f576e7abf80 R15: 00007ffd54128f88
</TASK>


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