Oops: general protection fault, probably for non-canonical address 0xdffffc0000000017: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x00000000000000b8-0x00000000000000bf] CPU: 0 UID: 0 PID: 5459 Comm: kworker/0:4 Not tainted 6.14.0-rc6-syzkaller-00007-g0b46b049d6ec #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: mld mld_ifc_work RIP: 0010:rt6_get_pcpu_route net/ipv6/route.c:1411 [inline] RIP: 0010:ip6_pol_route+0x4d1/0x15d0 net/ipv6/route.c:2264 Code: 84 f7 48 8b 03 65 4c 8b 30 31 ff 4c 89 f6 e8 16 0c 1d f7 4d 85 f6 0f 84 da 00 00 00 49 8d 9e 98 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 12 0f 00 00 44 8b 3b 31 ff 44 89 fe e8 RSP: 0018:ffffc90000007380 EFLAGS: 00010207 RAX: 0000000000000017 RBX: 00000000000000bf RCX: ffff8880127f0000 RDX: 0000000000000100 RSI: 0000000000000027 RDI: 0000000000000000 RBP: ffffc900000074d0 R08: ffffffff8aa4d7da R09: ffff888035ec83c0 R10: dffffc0000000000 R11: fffffbfff2079eef R12: ffffc90000007450 R13: 1ffff92000000e8a R14: 0000000000000027 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1afce70440 CR3: 000000000e938000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x58c/0x790 net/ipv6/fib6_rules.c:119 ip6_route_input_lookup net/ipv6/route.c:2300 [inline] ip6_route_input+0x859/0xd90 net/ipv6/route.c:2596 ip6_rcv_finish+0x140/0x3d0 net/ipv6/ip6_input.c:77 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5893 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:6006 process_backlog+0x662/0x15b0 net/core/dev.c:6354 __napi_poll+0xcb/0x490 net/core/dev.c:7188 napi_poll net/core/dev.c:7257 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7379 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 do_softirq+0x11b/0x1e0 kernel/softirq.c:462 </IRQ> <TASK> __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:389 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline] __dev_queue_xmit+0x1775/0x3f50 net/core/dev.c:4676 neigh_output include/net/neighbour.h:539 [inline] ip6_finish_output2+0x12bc/0x17c0 net/ipv6/ip6_output.c:141 ip6_finish_output+0x41e/0x840 net/ipv6/ip6_output.c:226 NF_HOOK+0x9e/0x430 include/linux/netfilter.h:314 mld_sendpack+0x843/0xdb0 net/ipv6/mcast.c:1868 mld_send_cr net/ipv6/mcast.c:2169 [inline] mld_ifc_work+0x7d9/0xd90 net/ipv6/mcast.c:2702 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd30 kernel/workqueue.c:3400 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:rt6_get_pcpu_route net/ipv6/route.c:1411 [inline] RIP: 0010:ip6_pol_route+0x4d1/0x15d0 net/ipv6/route.c:2264 Code: 84 f7 48 8b 03 65 4c 8b 30 31 ff 4c 89 f6 e8 16 0c 1d f7 4d 85 f6 0f 84 da 00 00 00 49 8d 9e 98 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 12 0f 00 00 44 8b 3b 31 ff 44 89 fe e8 RSP: 0018:ffffc90000007380 EFLAGS: 00010207 RAX: 0000000000000017 RBX: 00000000000000bf RCX: ffff8880127f0000 RDX: 0000000000000100 RSI: 0000000000000027 RDI: 0000000000000000 RBP: ffffc900000074d0 R08: ffffffff8aa4d7da R09: ffff888035ec83c0 R10: dffffc0000000000 R11: fffffbfff2079eef R12: ffffc90000007450 R13: 1ffff92000000e8a R14: 0000000000000027 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1afce70440 CR3: 000000000e938000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 84 f7 test %dh,%bh 2: 48 8b 03 mov (%rbx),%rax 5: 65 4c 8b 30 mov %gs:(%rax),%r14 9: 31 ff xor %edi,%edi b: 4c 89 f6 mov %r14,%rsi e: e8 16 0c 1d f7 call 0xf71d0c29 13: 4d 85 f6 test %r14,%r14 16: 0f 84 da 00 00 00 je 0xf6 1c: 49 8d 9e 98 00 00 00 lea 0x98(%r14),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 12 0f 00 00 jne 0xf49 37: 44 8b 3b mov (%rbx),%r15d 3a: 31 ff xor %edi,%edi 3c: 44 89 fe mov %r15d,%esi 3f: e8 .byte 0xe8