syzbot

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (9962 ticks this GP) idle=6614/1/0x4000000000000000 softirq=17380/17380 fqs=4752
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1132325          0            0
rcu: 	cputime:    18153      34325           50   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=17129 q=2113 ncpus=2)
CPU: 0 PID: 7290 Comm: syz.3.370 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:lock_acquire+0x208/0x420 kernel/locking/lockdep.c:5758
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3c 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 43 c7 44 3c 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc90000007240 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 8c2e6e5beca16300
RDX: 0000000000000000 RSI: ffffffff8acada80 RDI: ffffffff8b1c81e0
RBP: ffffc90000007350 R08: dffffc0000000000 R09: 1ffffffff2237ea0
R10: dffffc0000000000 R11: fffffbfff2237ea1 R12: 1ffff92000000e54
R13: ffffffff8d131fa0 R14: 0000000000000246 R15: dffffc0000000000
FS:  00007f2d82cdc6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdb3197f6c8 CR3: 000000002eacb000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 rcu_read_lock include/linux/rcupdate.h:786 [inline]
 is_bpf_text_address+0x47/0x2a0 kernel/bpf/core.c:741
 kernel_text_address+0xa0/0xd0 kernel/extable.c:125
 __kernel_text_address+0xd/0x30 kernel/extable.c:79
 unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
 arch_stack_walk+0x11d/0x190 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767
 slab_alloc_node mm/slub.c:3495 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc+0x11a/0x2d0 mm/slub.c:3519
 dst_alloc+0x105/0x170 net/core/dst.c:89
 ip6_dst_alloc net/ipv6/route.c:344 [inline]
 icmp6_dst_alloc+0x7b/0x400 net/ipv6/route.c:3316
 ndisc_send_skb+0x44e/0x14f0 net/ipv6/ndisc.c:493
 addrconf_rs_timer+0x2d5/0x630 net/ipv6/addrconf.c:4024
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x542/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 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+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
 </IRQ>
 <TASK>
 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:7010
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 61 db cf f6 e8 7c e1 00 f7 fb bf 01 00 00 00 <e8> f1 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc9000c00f6a0 EFLAGS: 00000286
RAX: 8c2e6e5beca16300 RBX: 0000000000000000 RCX: 8c2e6e5beca16300
RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: 0000000000000001
RBP: ffffc9000c00f740 R08: ffffffff8e8addaf R09: 1ffffffff1d15bb5
R10: dffffc0000000000 R11: fffffbfff1d15bb6 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001801ed4
 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:__unwind_start+0x682/0x7e0 arch/x86/kernel/unwind_orc.c:757
Code: a8 4b 00 eb 05 e8 ae a8 4b 00 48 89 df e8 26 cb ff ff 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 06 84 c0 75 0f 83 3b 00 74 3b <e8> 89 a8 4b 00 e9 15 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 7c e5
RSP: 0018:ffffc9000c00f800 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc9000c00f868 RCX: ffff88805a1c9e00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000c00f8f8 R08: ffff88805a1c9e00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000000 R12: ffffc9000c00f868
R13: ffffc9000c00f878 R14: 1ffff92001801f0d R15: ffffc9000c00f870
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xf8/0x190 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767
 slab_alloc_node mm/slub.c:3495 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc+0x11a/0x2d0 mm/slub.c:3519
 sk_prot_alloc+0x57/0x210 net/core/sock.c:2090
 sk_alloc+0x3a/0x360 net/core/sock.c:2152
 unix_create1+0xb0/0x790 net/unix/af_unix.c:-1
 unix_create+0x154/0x1f0 net/unix/af_unix.c:1084
 __sock_create+0x4a6/0x940 net/socket.c:1570
 sock_create net/socket.c:1626 [inline]
 __sys_socketpair+0x1c1/0x550 net/socket.c:1777
 __do_sys_socketpair net/socket.c:1830 [inline]
 __se_sys_socketpair net/socket.c:1827 [inline]
 __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1827
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2d81d9bf79
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:00007f2d82cdc028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f2d82016090 RCX: 00007f2d81d9bf79
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 00007f2d81e327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2d82016128 R14: 00007f2d82016090 R15: 00007ffe44dd2978
 </TASK>