general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 25945 Comm: syz-executor.0 Not tainted 5.14.0-rc2-next-20210721-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:br_ip4_multicast_query_received net/bridge/br_multicast.c:3079 [inline]
RIP: 0010:br_ip4_multicast_query net/bridge/br_multicast.c:3149 [inline]
RIP: 0010:br_multicast_ipv4_rcv net/bridge/br_multicast.c:3533 [inline]
RIP: 0010:br_multicast_rcv+0x4597/0x61a0 net/bridge/br_multicast.c:3649
Code: ff ff 48 8b 85 f8 fe ff ff 4c 8d b0 b0 00 00 00 e8 1e 08 7d f9 48 8b 95 d8 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 bc 12 00 00 48 8b 85 d8 fe ff ff 4c 89 f9 48 c1
RSP: 0018:ffffc90001bef420 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002611000
RDX: 0000000000000000 RSI: ffffffff87f8b982 RDI: ffff8881469bd070
RBP: ffffc90001bef5e0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff87f894f2 R11: 0000000000000000 R12: 0000000000000001
R13: ffff8880366fbc80 R14: ffff8881469bd018 R15: ffff8881469bd0c0
FS:  00007f4e1e393700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000529530 CR3: 00000000738c1000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 br_dev_xmit+0x6f6/0x1760 net/bridge/br_device.c:89
 __netdev_start_xmit include/linux/netdevice.h:4946 [inline]
 netdev_start_xmit include/linux/netdevice.h:4960 [inline]
 xmit_one net/core/dev.c:3659 [inline]
 dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3675
 __dev_queue_xmit+0x2988/0x3620 net/core/dev.c:4285
 packet_snd net/packet/af_packet.c:3016 [inline]
 packet_sendmsg+0x22fc/0x52b0 net/packet/af_packet.c:3044
 sock_sendmsg_nosec net/socket.c:703 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:723
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2446
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4e1e393188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000020000640 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd1c68b08f R14: 00007f4e1e393300 R15: 0000000000022000
Modules linked in:
---[ end trace 488f98496db3c39a ]---
RIP: 0010:br_ip4_multicast_query_received net/bridge/br_multicast.c:3079 [inline]
RIP: 0010:br_ip4_multicast_query net/bridge/br_multicast.c:3149 [inline]
RIP: 0010:br_multicast_ipv4_rcv net/bridge/br_multicast.c:3533 [inline]
RIP: 0010:br_multicast_rcv+0x4597/0x61a0 net/bridge/br_multicast.c:3649
Code: ff ff 48 8b 85 f8 fe ff ff 4c 8d b0 b0 00 00 00 e8 1e 08 7d f9 48 8b 95 d8 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 bc 12 00 00 48 8b 85 d8 fe ff ff 4c 89 f9 48 c1
RSP: 0018:ffffc90001bef420 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002611000
RDX: 0000000000000000 RSI: ffffffff87f8b982 RDI: ffff8881469bd070
RBP: ffffc90001bef5e0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff87f894f2 R11: 0000000000000000 R12: 0000000000000001
R13: ffff8880366fbc80 R14: ffff8881469bd018 R15: ffff8881469bd0c0
FS:  00007f4e1e393700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000529530 CR3: 00000000738c1000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400