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BUG: KASAN: slab-out-of-bounds in eth_header_parse_protocol+0xad/0xd0 net/ethernet/eth.c:282
Read of size 2 at addr ffff8881f4cdb80b by task syz-executor.3/1965

CPU: 1 PID: 1965 Comm: syz-executor.3 Not tainted 5.4.111-syzkaller-00138-g3c5dbcf40ba8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x24e lib/dump_stack.c:118
 print_address_description+0x9b/0x650 mm/kasan/report.c:384
 __kasan_report+0x182/0x260 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:641
 eth_header_parse_protocol+0xad/0xd0 net/ethernet/eth.c:282
 dev_parse_header_protocol include/linux/netdevice.h:3016 [inline]
 virtio_net_hdr_to_skb+0x6de/0xd70 include/linux/virtio_net.h:83
 packet_snd net/packet/af_packet.c:2976 [inline]
 packet_sendmsg+0x483a/0x6780 net/packet/af_packet.c:3013
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 sock_write_iter+0x330/0x450 net/socket.c:990
 call_write_iter include/linux/fs.h:1971 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x5ec/0x780 fs/read_write.c:496
 vfs_write+0x212/0x4e0 fs/read_write.c:558
 ksys_write+0x186/0x2b0 fs/read_write.c:611
 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466459
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:00007f503cee7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000122 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffffdc0f7bf R14: 00007f503cee7300 R15: 0000000000022000

Allocated by task 1:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x137/0x1e0 mm/kasan/common.c:517
 kmem_cache_alloc_trace+0x139/0x2b0 mm/slub.c:2848
 kmalloc include/linux/slab.h:556 [inline]
 kmalloc_array include/linux/slab.h:617 [inline]
 netdev_create_hash net/core/dev.c:9985 [inline]
 netdev_init+0xaf/0x1e0 net/core/dev.c:10002
 ops_init+0x26e/0x340 net/core/net_namespace.c:137
 __register_pernet_operations net/core/net_namespace.c:1142 [inline]
 register_pernet_operations+0x2ce/0xa10 net/core/net_namespace.c:1219
 register_pernet_subsys+0x24/0x40 net/core/net_namespace.c:1260
 net_dev_init+0xfb/0xa47 net/core/dev.c:10245
 do_one_initcall+0x1d3/0x6b0 init/main.c:1203
 do_initcall_level+0x101/0x256 init/main.c:1270
 do_initcalls+0x4b/0x8c init/main.c:1286
 kernel_init_freeable+0x260/0x3eb init/main.c:1467
 kernel_init+0xd/0x3a0 init/main.c:1384
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8881f4cdb000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 11 bytes to the right of
 2048-byte region [ffff8881f4cdb000, ffff8881f4cdb800)
The buggy address belongs to the page:
page:ffffea0007d33600 refcount:1 mapcount:0 mapping:ffff8881f5c0c000 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 0000000000000000 0000000100000001 ffff8881f5c0c000
raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881f4cdb700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881f4cdb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881f4cdb800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff8881f4cdb880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881f4cdb900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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