veth0_vlan: left promiscuous mode veth1_macvtap: left promiscuous mode veth0_macvtap: left promiscuous mode veth1_vlan: left promiscuous mode veth0_vlan: left promiscuous mode general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] CPU: 0 PID: 2838 Comm: kworker/u8:7 Not tainted 6.9.0-rc7-syzkaller-00188-gba16c1cf11c9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: netns cleanup_net RIP: 0010:__fib6_drop_pcpu_from+0x13e/0x270 net/ipv6/ip6_fib.c:983 Code: d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 58 03 d7 f7 48 8b 1b 48 85 db 74 2f 48 81 c3 90 00 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 33 03 d7 f7 48 8b 03 4c 39 e0 74 RSP: 0018:ffffc9000a27ece8 EFLAGS: 00010206 RAX: 0000000000000012 RBX: 0000000000000092 RCX: ffff88802b96bc00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffff8dd3a9e0 R08: ffffffff8a2060ba R09: 1ffffffff25dfcb7 R10: dffffc0000000000 R11: fffffbfff25dfcb8 R12: ffff88802d9b0800 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88802d9b0910 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005595461a0131 CR3: 000000000e134000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1026 [inline] fib6_purge_rt+0x193/0x890 net/ipv6/ip6_fib.c:1037 fib6_del_route net/ipv6/ip6_fib.c:1997 [inline] fib6_del+0xe77/0x1600 net/ipv6/ip6_fib.c:2042 fib6_clean_node+0x2f7/0x5e0 net/ipv6/ip6_fib.c:2204 fib6_walk_continue+0x658/0x8f0 net/ipv6/ip6_fib.c:2126 fib6_walk+0x168/0x2b0 net/ipv6/ip6_fib.c:2174 fib6_clean_tree net/ipv6/ip6_fib.c:2254 [inline] __fib6_clean_all+0x31f/0x4b0 net/ipv6/ip6_fib.c:2270 rt6_sync_down_dev net/ipv6/route.c:4903 [inline] rt6_disable_ip+0x170/0x890 net/ipv6/route.c:4908 addrconf_ifdown+0x15d/0x1bc0 net/ipv6/addrconf.c:3854 addrconf_notify+0x3cb/0x1020 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:1988 [inline] call_netdevice_notifiers net/core/dev.c:2002 [inline] dev_close_many+0x33c/0x4c0 net/core/dev.c:1543 unregister_netdevice_many_notify+0x544/0x16e0 net/core/dev.c:11080 unregister_netdevice_many net/core/dev.c:11163 [inline] default_device_exit_batch+0xa0f/0xa90 net/core/dev.c:11640 ops_exit_list net/core/net_namespace.c:178 [inline] cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3267 [inline] process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3348 worker_thread+0x86d/0xd70 kernel/workqueue.c:3429 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__fib6_drop_pcpu_from+0x13e/0x270 net/ipv6/ip6_fib.c:983 Code: d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 58 03 d7 f7 48 8b 1b 48 85 db 74 2f 48 81 c3 90 00 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 33 03 d7 f7 48 8b 03 4c 39 e0 74 RSP: 0018:ffffc9000a27ece8 EFLAGS: 00010206 RAX: 0000000000000012 RBX: 0000000000000092 RCX: ffff88802b96bc00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffff8dd3a9e0 R08: ffffffff8a2060ba R09: 1ffffffff25dfcb7 R10: dffffc0000000000 R11: fffffbfff25dfcb8 R12: ffff88802d9b0800 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88802d9b0910 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005595461a0131 CR3: 000000000e134000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: d8 48 c1 fmuls -0x3f(%rax) 3: e8 03 42 80 3c call 0x3c80420b 8: 28 00 sub %al,(%rax) a: 74 08 je 0x14 c: 48 89 df mov %rbx,%rdi f: e8 58 03 d7 f7 call 0xf7d7036c 14: 48 8b 1b mov (%rbx),%rbx 17: 48 85 db test %rbx,%rbx 1a: 74 2f je 0x4b 1c: 48 81 c3 90 00 00 00 add $0x90,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 33 03 d7 f7 call 0xf7d7036c 39: 48 8b 03 mov (%rbx),%rax 3c: 4c 39 e0 cmp %r12,%rax 3f: 74 .byte 0x74