Unable to handle kernel paging request at virtual address dfff800000000018 KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000018] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 9660 Comm: syz.1.828 Not tainted 6.15.0-rc7-syzkaller-g187899f4124a #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __in6_dev_get include/net/addrconf.h:347 [inline] pc : ip6_ignore_linkdown include/net/addrconf.h:443 [inline] pc : find_match+0xa0/0xacc net/ipv6/route.c:781 lr : find_match+0x74/0xacc net/ipv6/route.c:778 sp : ffff8000800165e0 x29: ffff800080016600 x28: 1fffe00018e1aee6 x27: 1fffe00018e1aee4 x26: 00000000000000c0 x25: ffff0000c70d7737 x24: 0000000000000201 x23: 0000000000000002 x22: ffff0000c70d7720 x21: 0000000000000000 x20: dfff800000000000 x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008051c10c x15: 0000000000000002 x14: 1ffff00010002d00 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700010002d02 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000018 x7 : ffff800080016990 x6 : 0000000000000002 x5 : ffff800080016990 x4 : ffff800080016980 x3 : 0000000000000002 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: __in6_dev_get include/net/addrconf.h:347 [inline] (P) ip6_ignore_linkdown include/net/addrconf.h:443 [inline] (P) find_match+0xa0/0xacc net/ipv6/route.c:781 (P) rt6_nh_find_match+0xcc/0x138 net/ipv6/route.c:821 nexthop_for_each_fib6_nh+0x1a8/0x3d0 net/ipv4/nexthop.c:1515 __find_rr_leaf+0x3b8/0x5c8 net/ipv6/route.c:862 find_rr_leaf net/ipv6/route.c:890 [inline] rt6_select net/ipv6/route.c:934 [inline] fib6_table_lookup+0x308/0x8b8 net/ipv6/route.c:2230 ip6_pol_route+0x1f8/0x1014 net/ipv6/route.c:2266 ip6_pol_route_output+0x60/0x94 net/ipv6/route.c:2641 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x258/0x45c net/ipv6/fib6_rules.c:125 ip6_route_output_flags_noref net/ipv6/route.c:2674 [inline] ip6_route_output_flags+0x2e4/0x578 net/ipv6/route.c:2686 ip6_route_output include/net/ip6_route.h:93 [inline] ip6_dst_lookup_tail+0x168/0x12e4 net/ipv6/ip6_output.c:1128 ip6_dst_lookup_flow+0x54/0xe0 net/ipv6/ip6_output.c:1259 udp_tunnel6_dst_lookup+0x1e8/0x354 net/ipv6/ip6_udp_tunnel.c:165 geneve6_xmit_skb drivers/net/geneve.c:957 [inline] geneve_xmit+0xd28/0x2afc drivers/net/geneve.c:1043 __netdev_start_xmit include/linux/netdevice.h:5204 [inline] netdev_start_xmit include/linux/netdevice.h:5213 [inline] xmit_one net/core/dev.c:3776 [inline] dev_hard_start_xmit+0x2b0/0x8ac net/core/dev.c:3792 __dev_queue_xmit+0x15a4/0x31f0 net/core/dev.c:4629 dev_queue_xmit include/linux/netdevice.h:3350 [inline] neigh_resolve_output+0x550/0x654 net/core/neighbour.c:1512 neigh_output include/net/neighbour.h:539 [inline] ip6_finish_output2+0x1544/0x1c7c net/ipv6/ip6_output.c:141 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] ip6_finish_output+0x418/0x7b4 net/ipv6/ip6_output.c:226 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x274/0x504 net/ipv6/ip6_output.c:247 dst_output include/net/dst.h:459 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xb48/0x1524 net/ipv6/ndisc.c:513 ndisc_send_rs+0x378/0x514 net/ipv6/ndisc.c:723 addrconf_rs_timer+0x2f4/0x580 net/ipv6/addrconf.c:4041 call_timer_fn+0x1b4/0x818 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x51c/0x76c kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xcc/0x194 kernel/time/timer.c:2445 handle_softirqs+0x328/0xc88 kernel/softirq.c:579 __do_softirq+0x14/0x20 kernel/softirq.c:613 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 call_on_irq_stack+0x24/0x30 arch/arm64/kernel/entry.S:891 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86 invoke_softirq kernel/softirq.c:460 [inline] __irq_exit_rcu+0x1b0/0x478 kernel/softirq.c:680 irq_exit_rcu+0x14/0x84 kernel/softirq.c:696 __el1_irq arch/arm64/kernel/entry-common.c:584 [inline] el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:598 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:603 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596 __arch_copy_from_user+0x84/0x23c arch/arm64/lib/copy_template.S:85 (P) copy_from_user include/linux/uaccess.h:210 [inline] copy_msghdr_from_user net/socket.c:2496 [inline] recvmsg_copy_msghdr net/socket.c:2752 [inline] ___sys_recvmsg+0x11c/0x45c net/socket.c:2824 do_recvmmsg+0x294/0x7cc net/socket.c:2923 __sys_recvmmsg net/socket.c:2997 [inline] __do_sys_recvmmsg net/socket.c:3020 [inline] __se_sys_recvmmsg net/socket.c:3013 [inline] __arm64_sys_recvmmsg+0x17c/0x238 net/socket.c:3013 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Code: 97978776 f94002c8 9103011a d343ff48 (38746908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97978776 bl 0xfffffffffe5e1dd8 4: f94002c8 ldr x8, [x22] 8: 9103011a add x26, x8, #0xc0 c: d343ff48 lsr x8, x26, #3 * 10: 38746908 ldrb w8, [x8, x20] <-- trapping instruction