bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state Oops: general protection fault, probably for non-canonical address 0xdffffc001fff41ea: 0000 [#1] SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x00000000fffa0f50-0x00000000fffa0f57] CPU: 0 UID: 0 PID: 17352 Comm: syz.6.3485 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:ip_mc_hash_remove net/ipv4/igmp.c:1431 [inline] RIP: 0010:__ip_mc_dec_group+0x25a/0x5b0 net/ipv4/igmp.c:1774 Code: 8c f8 0c f8 69 43 08 47 86 c8 61 49 bd 00 00 00 00 00 fc ff df c1 e8 17 4d 8d 24 c4 eb 2d e8 fd 9c a6 f7 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 0f 85 1e 03 00 00 4d 8b 34 24 4c 39 f3 0f 84 ef 00 RSP: 0018:ffffc9000450eda8 EFLAGS: 00010202 RAX: 000000001fff41ea RBX: ffff888059ce5a00 RCX: ffffc9000e65a000 RDX: 0000000000080000 RSI: ffffffff8a14ef03 RDI: 0000000000000001 RBP: ffff888059ce5c30 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 00000000fffa0f50 R13: dffffc0000000000 R14: 0000000000000001 R15: 000000006a0000e0 FS: 00007f47cc12d6c0(0000) GS:ffff8881246b9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556ab605c8 CR3: 0000000035460000 CR4: 00000000003526f0 Call Trace: br_ip4_multicast_leave_snoopers.isra.0+0x152/0x400 net/bridge/br_multicast.c:4204 br_multicast_leave_snoopers+0x8b/0x120 net/bridge/br_multicast.c:4224 br_dev_stop+0x15e/0x1b0 net/bridge/br_device.c:197 __dev_close_many+0x298/0x760 net/core/dev.c:1755 __dev_close net/core/dev.c:1767 [inline] __dev_change_flags+0x4d8/0x720 net/core/dev.c:9547 netif_change_flags+0x8d/0x160 net/core/dev.c:9612 do_setlink.constprop.0+0xb53/0x4380 net/core/rtnetlink.c:3143 rtnl_group_changelink net/core/rtnetlink.c:3775 [inline] __rtnl_newlink net/core/rtnetlink.c:3929 [inline] rtnl_newlink+0x18e0/0x2000 net/core/rtnetlink.c:4057 rtnetlink_rcv_msg+0x95b/0xe90 net/core/rtnetlink.c:6946 netlink_rcv_skb+0x155/0x420 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg net/socket.c:729 [inline] ____sys_sendmsg+0xa98/0xc70 net/socket.c:2614 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2668 __sys_sendmsg+0x16d/0x220 net/socket.c:2700 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f47cb38ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f47cc12d038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f47cb5b5fa0 RCX: 00007f47cb38ebe9 RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000003 RBP: 00007f47cb411e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f47cb5b6038 R14: 00007f47cb5b5fa0 R15: 00007ffe9f58cb28 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ip_mc_hash_remove net/ipv4/igmp.c:1431 [inline] RIP: 0010:__ip_mc_dec_group+0x25a/0x5b0 net/ipv4/igmp.c:1774 Code: 8c f8 0c f8 69 43 08 47 86 c8 61 49 bd 00 00 00 00 00 fc ff df c1 e8 17 4d 8d 24 c4 eb 2d e8 fd 9c a6 f7 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 0f 85 1e 03 00 00 4d 8b 34 24 4c 39 f3 0f 84 ef 00 RSP: 0018:ffffc9000450eda8 EFLAGS: 00010202 RAX: 000000001fff41ea RBX: ffff888059ce5a00 RCX: ffffc9000e65a000 RDX: 0000000000080000 RSI: ffffffff8a14ef03 RDI: 0000000000000001 RBP: ffff888059ce5c30 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 00000000fffa0f50 R13: dffffc0000000000 R14: 0000000000000001 R15: 000000006a0000e0 FS: 00007f47cc12d6c0(0000) GS:ffff8881246b9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555708ad5c8 CR3: 0000000035460000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 8c f8 mov %?,%eax 2: 0c f8 or $0xf8,%al 4: 69 43 08 47 86 c8 61 imul $0x61c88647,0x8(%rbx),%eax b: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 12: fc ff df 15: c1 e8 17 shr $0x17,%eax 18: 4d 8d 24 c4 lea (%r12,%rax,8),%r12 1c: eb 2d jmp 0x4b 1e: e8 fd 9c a6 f7 call 0xf7a69d20 23: 4c 89 e0 mov %r12,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 0f 85 1e 03 00 00 jne 0x353 35: 4d 8b 34 24 mov (%r12),%r14 39: 4c 39 f3 cmp %r14,%rbx 3c: 0f .byte 0xf 3d: 84 ef test %ch,%bh