rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (4847 ticks this GP) idle=c32c/1/0x4000000000000000 softirq=11851/11854 fqs=54 rcu: hardirqs softirqs csw/system rcu: number: 881371 13 0 rcu: cputime: 16918 4885 6 ==> 21810(ms) rcu: (t=10500 jiffies g=10385 q=962 ncpus=2) CPU: 0 PID: 6100 Comm: syz.1.62 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:__in6_dev_get include/net/addrconf.h:323 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:414 [inline] RIP: 0010:find_match+0xb5/0xc80 net/ipv6/route.c:782 Code: df e8 6f 6a af f8 48 89 d8 bb 48 03 00 00 48 03 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 4e 6a af f8 48 8b 1b 96 44 41 01 41 89 c4 31 ff 89 c6 e8 0a 14 58 f8 45 85 e4 74 1a RSP: 0018:ffffc900000071e0 EFLAGS: 00000246 RAX: 1ffff11005b8e869 RBX: ffff88807927f000 RCX: 0000000000000100 RDX: ffff88801af7bc00 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 1ffff1100ba05395 R08: ffffc900000074e0 R09: ffffc900000074f0 R10: ffffc90000007340 R11: fffff52000000e6a R12: dffffc0000000000 R13: 0000000000000003 R14: 1ffff1100ba05397 R15: ffff88805d029cbf FS: 00007f1be6e6c6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e701ff8 CR3: 00000000744d6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __find_rr_leaf+0x23b/0x6c0 net/ipv6/route.c:870 find_rr_leaf net/ipv6/route.c:891 [inline] rt6_select net/ipv6/route.c:935 [inline] fib6_table_lookup+0x3a0/0xa70 net/ipv6/route.c:2221 ip6_pol_route+0x22d/0x1160 net/ipv6/route.c:2257 pol_lookup_func include/net/ip6_fib.h:578 [inline] fib6_rule_lookup+0x1d7/0x510 net/ipv6/fib6_rules.c:116 ip6_route_input_lookup net/ipv6/route.c:2326 [inline] ip6_route_input+0x6cf/0xa50 net/ipv6/route.c:2622 ip6_rcv_finish+0x143/0x230 net/ipv6/ip6_input.c:77 NF_HOOK+0x303/0x390 include/linux/netfilter.h:304 __netif_receive_skb_one_core net/core/dev.c:5608 [inline] __netif_receive_skb+0xcc/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:should_resched arch/x86/include/asm/preempt.h:104 [inline] RIP: 0010:__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline] RIP: 0010:_raw_spin_unlock+0x2f/0x40 kernel/locking/spinlock.c:186 Code: 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 4a 15 ef f6 48 89 df e8 62 e7 ef f6 bf 01 00 00 00 e8 b8 09 e3 f6 65 8b 05 a9 52 8b 75 <85> c0 74 02 5b c3 e8 c6 36 88 f6 5b c3 0f 1f 40 00 f3 0f 1e fa 55 RSP: 0018:ffffc90005cafd70 EFLAGS: 00000213 RAX: 0000000000000001 RBX: ffff8880769df810 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 00000000ffffffff RBP: ffffc90005cafe68 R08: ffff8880769df813 R09: 1ffff1100ed3bf02 R10: dffffc0000000000 R11: ffffed100ed3bf03 R12: ffff88814367c020 R13: ffff8880769df780 R14: ffff8880769df780 R15: ffff88805d4e5558 d_instantiate+0x6f/0x90 fs/dcache.c:2044 alloc_file_pseudo+0x16d/0x200 fs/file_table.c:335 sock_alloc_file+0xb7/0x280 net/socket.c:469 sock_map_fd net/socket.c:494 [inline] __sys_socket+0x13d/0x1a0 net/socket.c:1724 __do_sys_socket net/socket.c:1729 [inline] __se_sys_socket net/socket.c:1727 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1727 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: 0033:0x7f1be5f8efc9 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:00007f1be6e6c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f1be61e6180 RCX: 00007f1be5f8efc9 RDX: 0000000000000084 RSI: 0000000000000001 RDI: 0000000000000002 RBP: 00007f1be6011f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1be61e6218 R14: 00007f1be61e6180 R15: 00007ffea17e7278