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BUG: KASAN: slab-out-of-bounds in eth_header_parse_protocol+0xdc/0xe0 net/ethernet/eth.c:282
Read of size 2 at addr ffff88807449e00b by task syz-executor.1/15136

CPU: 1 PID: 15136 Comm: syz-executor.1 Not tainted 5.12.0-rc6-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+0x141/0x1d7 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:232
 __kasan_report mm/kasan/report.c:399 [inline]
 kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416
 eth_header_parse_protocol+0xdc/0xe0 net/ethernet/eth.c:282
 dev_parse_header_protocol include/linux/netdevice.h:3179 [inline]
 virtio_net_hdr_to_skb.constprop.0+0x99d/0xcd0 include/linux/virtio_net.h:83
 packet_snd net/packet/af_packet.c:2994 [inline]
 packet_sendmsg+0x2325/0x52b0 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:674
 sock_no_sendpage+0xf3/0x130 net/core/sock.c:2860
 kernel_sendpage.part.0+0x1ab/0x350 net/socket.c:3631
 kernel_sendpage net/socket.c:3628 [inline]
 sock_sendpage+0xe5/0x140 net/socket.c:947
 pipe_to_sendpage+0x2ad/0x380 fs/splice.c:364
 splice_from_pipe_feed fs/splice.c:418 [inline]
 __splice_from_pipe+0x43e/0x8a0 fs/splice.c:562
 splice_from_pipe fs/splice.c:597 [inline]
 generic_splice_sendpage+0xd4/0x140 fs/splice.c:746
 do_splice_from fs/splice.c:767 [inline]
 do_splice+0xb7e/0x1940 fs/splice.c:1079
 __do_splice+0x134/0x250 fs/splice.c:1144
 __do_sys_splice fs/splice.c:1350 [inline]
 __se_sys_splice fs/splice.c:1332 [inline]
 __x64_sys_splice+0x198/0x250 fs/splice.c:1332
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
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:00007f1acf508188 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: 0000000000a9fb1f R14: 00007f1acf508300 R15: 0000000000022000

Allocated by task 8632:
 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:427 [inline]
 ____kasan_kmalloc mm/kasan/common.c:506 [inline]
 ____kasan_kmalloc mm/kasan/common.c:465 [inline]
 __kasan_kmalloc+0x99/0xc0 mm/kasan/common.c:515
 kmalloc_node include/linux/slab.h:577 [inline]
 kvmalloc_node+0xb4/0xf0 mm/util.c:587
 kvmalloc include/linux/mm.h:785 [inline]
 kvzalloc include/linux/mm.h:793 [inline]
 alloc_netdev_mqs+0x97/0xeb0 net/core/dev.c:10694
 nsim_create+0x3b/0x2f0 drivers/net/netdevsim/netdev.c:290
 __nsim_dev_port_add+0x270/0x4c0 drivers/net/netdevsim/dev.c:941
 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:990 [inline]
 nsim_dev_probe+0xbcb/0x1050 drivers/net/netdevsim/dev.c:1121
 really_probe+0x291/0xe60 drivers/base/dd.c:557
 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:743
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:849
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x228/0x4a0 drivers/base/dd.c:917
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xbdb/0x1db0 drivers/base/core.c:3242
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:336 [inline]
 new_device_store+0x374/0x5c0 drivers/net/netdevsim/bus.c:215
 bus_attr_store+0x72/0xa0 drivers/base/bus.c:122
 sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:139
 kernfs_fop_write_iter+0x342/0x500 fs/kernfs/file.c:296
 call_write_iter include/linux/fs.h:1977 [inline]
 new_sync_write+0x426/0x650 fs/read_write.c:518
 vfs_write+0x796/0xa30 fs/read_write.c:605
 ksys_write+0x12d/0x250 fs/read_write.c:658
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff88807449c000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 11 bytes to the right of
 8192-byte region [ffff88807449c000, ffff88807449e000)
The buggy address belongs to the page:
page:ffffea0001d12600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x74498
head:ffffea0001d12600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010442280
raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88807449df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88807449df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807449e000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff88807449e080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88807449e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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