==================================================================
BUG: KASAN: use-after-free in eth_header_parse_protocol+0xd7/0xe0 net/ethernet/eth.c:282
Read of size 2 at addr ffff888012b9400b by task syz-executor.1/10088

CPU: 1 PID: 10088 Comm: syz-executor.1 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0xa5/0xe6 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:230
 __kasan_report mm/kasan/report.c:397 [inline]
 kasan_report.cold+0x79/0xd5 mm/kasan/report.c:414
 eth_header_parse_protocol+0xd7/0xe0 net/ethernet/eth.c:282
 dev_parse_header_protocol include/linux/netdevice.h:3177 [inline]
 virtio_net_hdr_to_skb.constprop.0+0x857/0xb00 include/linux/virtio_net.h:83
 packet_snd net/packet/af_packet.c:2994 [inline]
 packet_sendmsg+0x1d97/0x47c0 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg+0xab/0xe0 net/socket.c:674
 sock_no_sendpage+0xe7/0x120 net/core/sock.c:2860
 kernel_sendpage.part.0+0x11e/0x240 net/socket.c:3641
 kernel_sendpage net/socket.c:3638 [inline]
 sock_sendpage+0xc7/0x1a0 net/socket.c:947
 pipe_to_sendpage+0x245/0x410 fs/splice.c:364
 splice_from_pipe_feed fs/splice.c:418 [inline]
 __splice_from_pipe+0x362/0x810 fs/splice.c:562
 splice_from_pipe fs/splice.c:597 [inline]
 generic_splice_sendpage+0xba/0x120 fs/splice.c:746
 do_splice_from fs/splice.c:767 [inline]
 do_splice+0x9ed/0x1b00 fs/splice.c:1079
 __do_splice+0xf4/0x1b0 fs/splice.c:1144
 __do_sys_splice fs/splice.c:1350 [inline]
 __se_sys_splice fs/splice.c:1332 [inline]
 __x64_sys_splice+0x14a/0x200 fs/splice.c:1332
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465f69
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:00007f6b8c852188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465f69
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000004bfa3f R08: 000000000004ffe0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffe14b8adff R14: 00007f6b8c852300 R15: 0000000000022000

Allocated by task 9165:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:400 [inline]
 ____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:428
 kasan_slab_alloc include/linux/kasan.h:208 [inline]
 slab_post_alloc_hook mm/slab.h:516 [inline]
 slab_alloc_node mm/slub.c:2895 [inline]
 slab_alloc mm/slub.c:2903 [inline]
 kmem_cache_alloc+0x1c6/0x440 mm/slub.c:2908
 getname_kernel+0x49/0x330 fs/namei.c:218
 kernel_execve+0x19/0x3e0 fs/exec.c:1936
 call_usermodehelper_exec_async+0x2c1/0x500 kernel/umh.c:110
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Freed by task 9165:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:356
 ____kasan_slab_free+0xe1/0x110 mm/kasan/common.c:361
 kasan_slab_free include/linux/kasan.h:191 [inline]
 slab_free_hook mm/slub.c:1561 [inline]
 slab_free_freelist_hook+0x6b/0x160 mm/slub.c:1594
 slab_free mm/slub.c:3146 [inline]
 kmem_cache_free+0x82/0x350 mm/slub.c:3162
 kernel_execve+0x2d4/0x3e0 fs/exec.c:1977
 call_usermodehelper_exec_async+0x2c1/0x500 kernel/umh.c:110
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

The buggy address belongs to the object at ffff888012b93300
 which belongs to the cache names_cache of size 4096
The buggy address is located 3339 bytes inside of
 4096-byte region [ffff888012b93300, ffff888012b94300)
The buggy address belongs to the page:
page:000000005099a3bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12b90
head:000000005099a3bb order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff88800f9c5140
raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888012b93f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888012b93f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888012b94000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff888012b94080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888012b94100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================