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BUG: KASAN: use-after-free in eth_header_parse_protocol+0xad/0xd0 net/ethernet/eth.c:282
Read of size 2 at addr ffff8881a948900b by task syz-executor.0/11468

CPU: 1 PID: 11468 Comm: syz-executor.0 Not tainted 5.4.111-syzkaller-00141-gce6a5172613f #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]
 kernel_sendmsg+0xf5/0x130 net/socket.c:678
 sock_no_sendpage+0x143/0x1b0 net/core/sock.c:2763
 kernel_sendpage net/socket.c:3764 [inline]
 sock_sendpage+0xd0/0x120 net/socket.c:936
 pipe_to_sendpage+0x23b/0x300 fs/splice.c:449
 splice_from_pipe_feed fs/splice.c:500 [inline]
 __splice_from_pipe+0x2d3/0x870 fs/splice.c:624
 splice_from_pipe fs/splice.c:659 [inline]
 generic_splice_sendpage+0x181/0x210 fs/splice.c:829
 do_splice_from fs/splice.c:848 [inline]
 do_splice fs/splice.c:1156 [inline]
 __do_sys_splice fs/splice.c:1433 [inline]
 __se_sys_splice+0x7a8/0x1b00 fs/splice.c:1413
 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:00007f2699cd3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000466459
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000004bf9fb R08: 000000000004ffe0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffcf9b2272f R14: 00007f2699cd3300 R15: 0000000000022000

Allocated by task 142:
 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
 __kmalloc+0x174/0x2f0 mm/slub.c:3903
 kmalloc include/linux/slab.h:561 [inline]
 sk_prot_alloc+0xbf/0x260 net/core/sock.c:1600
 sk_alloc+0x30/0x330 net/core/sock.c:1654
 __netlink_create net/netlink/af_netlink.c:629 [inline]
 netlink_create+0x3b7/0x610 net/netlink/af_netlink.c:692
 __sock_create+0x393/0x730 net/socket.c:1419
 sock_create net/socket.c:1470 [inline]
 __sys_socket+0x133/0x370 net/socket.c:1512
 __do_sys_socket net/socket.c:1521 [inline]
 __se_sys_socket net/socket.c:1519 [inline]
 __x64_sys_socket+0x76/0x80 net/socket.c:1519
 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 9:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 kasan_set_free_info mm/kasan/common.c:333 [inline]
 __kasan_slab_free+0x18a/0x240 mm/kasan/common.c:475
 slab_free_hook mm/slub.c:1454 [inline]
 slab_free_freelist_hook+0x7b/0x150 mm/slub.c:1492
 slab_free mm/slub.c:3072 [inline]
 kfree+0xe0/0x660 mm/slub.c:4061
 sk_prot_free net/core/sock.c:1637 [inline]
 __sk_destruct+0x427/0x4b0 net/core/sock.c:1722
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch+0x4c0/0xa10 kernel/rcu/tree.c:2166
 rcu_core+0x697/0xf40 kernel/rcu/tree.c:2386
 __do_softirq+0x23e/0x615 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881a9489000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 11 bytes inside of
 2048-byte region [ffff8881a9489000, ffff8881a9489800)
The buggy address belongs to the page:
page:ffffea0006a52200 refcount:1 mapcount:0 mapping:ffff8881f5c0c000 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5c0c000
raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881a9488f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881a9488f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881a9489000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff8881a9489080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881a9489100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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