bridge_slave_1: left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state bridge_slave_0: left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state Oops: general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] CPU: 1 UID: 0 PID: 1113 Comm: kworker/u8:8 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: netns cleanup_net RIP: 0010:__fib6_drop_pcpu_from+0x1f0/0x3b0 net/ipv6/ip6_fib.c:993 Code: 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 ef e8 87 d5 27 f8 49 8b 6d 00 48 85 ed 74 2f 48 81 c5 90 00 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 ef e8 61 d5 27 f8 48 8b 45 00 48 3b 44 RSP: 0018:ffffc90003f8ed70 EFLAGS: 00010206 RAX: 0000000000000012 RBX: ffffffff8d98bdd0 RCX: ffff888026a81e80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000091 R08: ffffffff89ff5d96 R09: ffffffff8df41cc0 R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: 0000000000000000 R13: ffffe8ffffc3f380 R14: dffffc0000000000 R15: ffff888031056d20 FS: 0000000000000000(0000) GS:ffff8881261b1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f714fc4ee9c CR3: 000000000dd3a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1027 [inline] fib6_purge_rt+0x10b/0x910 net/ipv6/ip6_fib.c:1038 fib6_del_route net/ipv6/ip6_fib.c:2046 [inline] fib6_del+0xee1/0x1550 net/ipv6/ip6_fib.c:2091 fib6_clean_node+0x29f/0x590 net/ipv6/ip6_fib.c:2253 fib6_walk_continue+0x67b/0x910 net/ipv6/ip6_fib.c:2175 fib6_walk+0x149/0x290 net/ipv6/ip6_fib.c:2223 fib6_clean_tree net/ipv6/ip6_fib.c:2303 [inline] __fib6_clean_all+0x234/0x380 net/ipv6/ip6_fib.c:2319 rt6_sync_down_dev net/ipv6/route.c:5003 [inline] rt6_disable_ip+0x120/0x720 net/ipv6/route.c:5008 addrconf_ifdown+0x14d/0x1870 net/ipv6/addrconf.c:3853 addrconf_notify+0x1bc/0xfe0 net/ipv6/addrconf.c:-1 notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2268 [inline] call_netdevice_notifiers net/core/dev.c:2282 [inline] netif_close_many+0x29c/0x410 net/core/dev.c:1785 unregister_netdevice_many_notify+0xb19/0x2310 net/core/dev.c:12351 ops_exit_rtnl_list net/core/net_namespace.c:187 [inline] ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:248 cleanup_net+0x4d8/0x7a0 net/core/net_namespace.c:696 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__fib6_drop_pcpu_from+0x1f0/0x3b0 net/ipv6/ip6_fib.c:993 Code: 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 ef e8 87 d5 27 f8 49 8b 6d 00 48 85 ed 74 2f 48 81 c5 90 00 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 ef e8 61 d5 27 f8 48 8b 45 00 48 3b 44 RSP: 0018:ffffc90003f8ed70 EFLAGS: 00010206 RAX: 0000000000000012 RBX: ffffffff8d98bdd0 RCX: ffff888026a81e80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000091 R08: ffffffff89ff5d96 R09: ffffffff8df41cc0 R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: 0000000000000000 R13: ffffe8ffffc3f380 R14: dffffc0000000000 R15: ffff888031056d20 FS: 0000000000000000(0000) GS:ffff8881261b1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f714fc4ee9c CR3: 000000000dd3a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 48 c1 e8 03 shr $0x3,%rax 4: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) 9: 74 08 je 0x13 b: 4c 89 ef mov %r13,%rdi e: e8 87 d5 27 f8 call 0xf827d59a 13: 49 8b 6d 00 mov 0x0(%r13),%rbp 17: 48 85 ed test %rbp,%rbp 1a: 74 2f je 0x4b 1c: 48 81 c5 90 00 00 00 add $0x90,%rbp 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 ef mov %rbp,%rdi 34: e8 61 d5 27 f8 call 0xf827d59a 39: 48 8b 45 00 mov 0x0(%rbp),%rax 3d: 48 rex.W 3e: 3b .byte 0x3b 3f: 44 rex.R