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: 6909 Comm: kworker/u8:35 Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: ipv6_addrconf addrconf_dad_work 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 : ffff800080016460 x29: ffff800080016480 x28: 1ffff00012e9812d x27: 1ffff00012e9812b x26: 00000000000000c0 x25: ffff8000974c096f x24: 0000000000000000 x23: 0000000000000003 x22: ffff8000974c0958 x21: 000000000000000d x20: dfff800000000000 x19: 0000000000000000 x18: 1fffe0003386f276 x17: 0000000000020010 x16: ffff80008051c10c x15: 0000000000000002 x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000ff0100 x11: ffff0000d09e0000 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000018 x7 : ffff800080016750 x6 : 0000000000000003 x5 : ffff800080016750 x4 : ffff800080016740 x3 : 0000000000000003 x2 : 000000000000000d 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) __find_rr_leaf+0x204/0x5c8 net/ipv6/route.c:869 find_rr_leaf net/ipv6/route.c:899 [inline] rt6_select net/ipv6/route.c:934 [inline] fib6_table_lookup+0x45c/0x8b8 net/ipv6/route.c:2230 ip6_pol_route+0x1f8/0x1014 net/ipv6/route.c:2266 ip6_pol_route_input+0x74/0x94 net/ipv6/route.c:2323 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x174/0x45c net/ipv6/fib6_rules.c:120 ip6_route_input_lookup net/ipv6/route.c:2335 [inline] ip6_route_input+0x5d0/0x8d4 net/ipv6/route.c:2631 ip6_rcv_finish_core+0x218/0x3c8 net/ipv6/ip6_input.c:66 ip6_rcv_finish+0x120/0x21c net/ipv6/ip6_input.c:77 ip_sabotage_in+0x1a8/0x220 net/bridge/br_netfilter_hooks.c:993 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xb4/0x21c net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x1c8/0x358 include/linux/netfilter.h:312 ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:309 __netif_receive_skb_one_core net/core/dev.c:5887 [inline] __netif_receive_skb+0xcc/0x2a8 net/core/dev.c:6000 netif_receive_skb_internal net/core/dev.c:6086 [inline] netif_receive_skb+0x1e0/0x838 net/core/dev.c:6145 br_netif_receive_skb+0x144/0x18c net/bridge/br_input.c:30 NF_HOOK+0xa8/0x35c include/linux/netfilter.h:314 br_pass_frame_up+0x284/0x424 net/bridge/br_input.c:70 br_handle_frame_finish+0x1008/0x1460 net/bridge/br_input.c:226 br_nf_hook_thresh+0x304/0x3c8 net/bridge/br_netfilter_hooks.c:-1 br_nf_pre_routing_finish_ipv6+0x87c/0xb98 net/bridge/br_netfilter_ipv6.c:-1 NF_HOOK include/linux/netfilter.h:314 [inline] br_nf_pre_routing_ipv6+0x2c4/0x5ac net/bridge/br_netfilter_ipv6.c:184 br_nf_pre_routing+0x578/0x1130 net/bridge/br_netfilter_hooks.c:508 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_bridge_pre net/bridge/br_input.c:282 [inline] br_handle_frame+0x7b0/0x10b8 net/bridge/br_input.c:433 __netif_receive_skb_core+0xeac/0x39bc net/core/dev.c:5773 __netif_receive_skb_one_core net/core/dev.c:5885 [inline] __netif_receive_skb+0x78/0x2a8 net/core/dev.c:6000 process_backlog+0x60c/0x10e4 net/core/dev.c:6352 __napi_poll+0xb4/0x3fc net/core/dev.c:7324 napi_poll net/core/dev.c:7388 [inline] net_rx_action+0x5d4/0xcc8 net/core/dev.c:7510 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 do_softirq+0x90/0xf8 kernel/softirq.c:480 __local_bh_enable_ip+0x240/0x35c kernel/softirq.c:407 local_bh_enable+0x28/0x34 include/linux/bottom_half.h:33 rcu_read_unlock_bh include/linux/rcupdate.h:910 [inline] __dev_queue_xmit+0x1750/0x31f0 net/core/dev.c:4656 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_ns+0xd4/0x164 net/ipv6/ndisc.c:671 addrconf_dad_work+0x770/0x10cc net/ipv6/addrconf.c:4286 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847 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