rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 4603 jiffies s: 1561 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3826 Comm: syz.1.41 Not tainted 6.1.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:get_stack_info+0x1/0xf0 arch/x86/kernel/dumpstack_64.c:193
Code: 0e 48 98 48 8d 04 c5 68 51 06 8b 48 8b 00 c3 83 c7 fb 83 ff 05 77 0e 89 f8 48 8d 04 c5 c0 4f 06 8b 48 8b 00 c3 31 c0 c3 90 55 <41> 57 41 56 41 55 41 54 53 49 89 ce 48 89 d3 48 89 f5 48 85 f6 74
RSP: 0018:ffffc900001e0490 EFLAGS: 00000246
RAX: 1ffff9200003c0a7 RBX: ffffc900001e04a0 RCX: ffffc900001e0520
RDX: ffffc900001e0500 RSI: ffff88807c7cbb80 RDI: ffffc900001e04a0
RBP: ffffc900001e0501 R08: dffffc0000000000 R09: ffffc900001e0500
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900001e0520
R13: ffffc900001e0528 R14: ffffc900001e0500 R15: 1ffff9200003c0a5
FS:  00007f6c478896c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f10fff8 CR3: 000000005a0cb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __unwind_start+0x437/0x720 arch/x86/kernel/unwind_orc.c:686
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xdb/0x140 arch/x86/kernel/stacktrace.c:24
 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:3963
 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
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 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:__sanitizer_cov_trace_const_cmp1+0x0/0x80 kernel/kcov.c:291
Code: 39 c8 77 1e 49 ff c2 4c 89 12 48 c7 44 11 08 06 00 00 00 48 89 7c 11 10 48 89 74 11 18 4c 89 44 11 20 c3 0f 1f 80 00 00 00 00 <4c> 8b 04 24 65 48 8b 15 34 cc 77 7e 65 8b 05 35 cc 77 7e a9 00 01
RSP: 0018:ffffc90004a2f030 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000013 RCX: 0000000000040000
RDX: ffffc90003eb2000 RSI: 0000000000000013 RDI: 00000000000000ff
RBP: ffffffff8c5d937b R08: ffffffff817fe15e R09: ffffc90004a2f240
R10: 0000000000000003 R11: ffff88807c7cbb80 R12: 00000000000000a8
R13: ffffc90004a2f240 R14: 00000000000000da R15: dffffc0000000000
 get_symbol_offset kernel/kallsyms.c:140 [inline]
 kallsyms_lookup_buildid+0x18e/0x6a0 kernel/kallsyms.c:415
 __sprint_symbol+0x186/0x3c0 kernel/kallsyms.c:523
 symbol_string+0x18d/0x3b0 lib/vsprintf.c:1000
 pointer+0x7a2/0x1000 lib/vsprintf.c:2403
 vsnprintf+0xdf8/0x1c70 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:596 [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+0x32a/0x3d0 net/core/flow_dissector.c:913
 bpf_prog_test_run_flow_dissector+0x465/0x7e0 net/bpf/test_run.c:1487
 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3685
 __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:5038
 __do_sys_bpf kernel/bpf/syscall.c:5124 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5122 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5122
 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: 0033:0x7f6c46b779f9
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:00007f6c47889048 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f6c46d05f80 RCX: 00007f6c46b779f9
RDX: 0000000000000050 RSI: 0000000020000640 RDI: 000000000000000a
RBP: 00007f6c46be58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f6c46d05f80 R15: 00007ffde3ca45c8
 </TASK>