IPVS: fo: UDP 224.0.0.2:0 - no destination available Unable to handle kernel paging request at virtual address dfff800000000068 KASAN: null-ptr-deref in range [0x0000000000000340-0x0000000000000347] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000068] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 11946 Comm: syz.4.2544 Not tainted 6.1.141-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __in6_dev_get include/net/addrconf.h:323 [inline] pc : ip6_ignore_linkdown include/net/addrconf.h:414 [inline] pc : find_match+0xa0/0xb0c net/ipv6/route.c:784 lr : find_match+0x74/0xb0c net/ipv6/route.c:781 sp : ffff800008016e60 x29: ffff800008016e80 x28: 1fffe0001f221144 x27: dfff800000000000 x26: 0000000000000340 x25: ffff0000f9108a37 x24: 0000000000000201 x23: 0000000000000003 x22: ffff0000f9108a20 x21: 0000000000000001 x20: 1fffe0001f221146 x19: 0000000000000000 x18: ffff800011a7bce0 x17: ffff800011a69e14 x16: ffff8000082d0750 x15: 0000000000000000 x14: 00000000ffffffff x13: 0000000000ff0100 x12: 0000000000ff0100 x11: ff0080001077fb04 x10: 0000000000000000 x9 : ffff0000d9ba1bc0 x8 : 0000000000000068 x7 : ffff800008017210 x6 : 0000000000000003 x5 : ffff800008017210 x4 : ffff800008017200 x3 : 0000000000000003 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: __in6_dev_get include/net/addrconf.h:323 [inline] ip6_ignore_linkdown include/net/addrconf.h:414 [inline] find_match+0xa0/0xb0c net/ipv6/route.c:784 rt6_nh_find_match+0xcc/0x138 net/ipv6/route.c:824 nexthop_for_each_fib6_nh+0x1a8/0x3d0 net/ipv4/nexthop.c:1243 __find_rr_leaf+0x3b8/0x5c8 net/ipv6/route.c:865 find_rr_leaf net/ipv6/route.c:902 [inline] rt6_select net/ipv6/route.c:937 [inline] fib6_table_lookup+0x45c/0x8b8 net/ipv6/route.c:2223 ip6_pol_route+0x1f4/0x1024 net/ipv6/route.c:2259 ip6_pol_route_output+0x60/0x94 net/ipv6/route.c:2634 pol_lookup_func include/net/ip6_fib.h:579 [inline] fib6_rule_lookup+0x258/0x4a8 net/ipv6/fib6_rules.c:121 ip6_route_output_flags_noref+0x250/0x314 net/ipv6/route.c:2666 ip6_route_output_flags+0xe4/0x368 net/ipv6/route.c:2679 ip6_dst_lookup_tail+0x274/0x12c0 net/ipv6/ip6_output.c:1152 ip6_dst_lookup_flow+0x54/0xe0 net/ipv6/ip6_output.c:1255 tipc_udp_xmit+0x28c/0x93c net/tipc/udp_media.c:210 tipc_udp_send_msg+0x254/0x380 net/tipc/udp_media.c:258 tipc_bearer_xmit_skb+0x244/0x384 net/tipc/bearer.c:577 tipc_disc_timeout+0x4c8/0x608 net/tipc/discover.c:338 call_timer_fn+0x1b8/0x964 kernel/time/timer.c:1504 expire_timers kernel/time/timer.c:1549 [inline] __run_timers+0x460/0x6bc kernel/time/timer.c:1820 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1833 handle_softirqs+0x318/0xc6c kernel/softirq.c:596 __do_softirq+0x14/0x20 kernel/softirq.c:630 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:893 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 invoke_softirq kernel/softirq.c:477 [inline] __irq_exit_rcu+0x23c/0x43c kernel/softirq.c:679 irq_exit_rcu+0x14/0x84 kernel/softirq.c:691 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline] el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:486 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] finish_lock_switch+0xb8/0x1c4 kernel/sched/core.c:5003 finish_task_switch+0x120/0x620 kernel/sched/core.c:5121 context_switch kernel/sched/core.c:5247 [inline] __schedule+0xdd8/0x1b2c kernel/sched/core.c:6561 preempt_schedule_common+0xec/0x1a0 kernel/sched/core.c:6730 preempt_schedule+0x64/0x84 kernel/sched/core.c:6754 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xa8/0xac kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] __skb_try_recv_datagram+0x134/0x410 net/core/datagram.c:265 __unix_dgram_recvmsg+0x21c/0xae8 net/unix/af_unix.c:2447 unix_dgram_recvmsg+0xd0/0xe8 net/unix/af_unix.c:2544 sock_recvmsg_nosec net/socket.c:1022 [inline] ____sys_recvmsg+0x62c/0x71c net/socket.c:2736 ___sys_recvmsg net/socket.c:2780 [inline] do_recvmmsg+0x364/0x96c net/socket.c:2874 __sys_recvmmsg net/socket.c:2953 [inline] __do_sys_recvmmsg net/socket.c:2976 [inline] __se_sys_recvmmsg net/socket.c:2969 [inline] __arm64_sys_recvmmsg+0x17c/0x238 net/socket.c:2969 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: 96055809 f94002c8 910d011a d343ff48 (387b6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 96055809 bl 0xfffffffff8156024 4: f94002c8 ldr x8, [x22] 8: 910d011a add x26, x8, #0x340 c: d343ff48 lsr x8, x26, #3 * 10: 387b6908 ldrb w8, [x8, x27] <-- trapping instruction