==================================================================
BUG: KASAN: use-after-free in deliver_ptype_list_skb net/core/dev.c:1871 [inline]
BUG: KASAN: use-after-free in __netif_receive_skb_core+0x2be3/0x33d0 net/core/dev.c:4406
Read of size 2 at addr ffff8801ca047680 by task syzkaller000679/4605
CPU: 0 PID: 4605 Comm: syzkaller000679 Not tainted 4.13.0-mm1+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:16 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:52
print_address_description+0x73/0x250 mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report+0x24e/0x340 mm/kasan/report.c:409
__asan_report_load2_noabort+0x14/0x20 mm/kasan/report.c:428
deliver_ptype_list_skb net/core/dev.c:1871 [inline]
__netif_receive_skb_core+0x2be3/0x33d0 net/core/dev.c:4406
__netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4461
netif_receive_skb_internal+0x10b/0x670 net/core/dev.c:4534
napi_skb_finish net/core/dev.c:4895 [inline]
napi_gro_receive+0x3d0/0x500 net/core/dev.c:4926
receive_buf+0xcc5/0x51f0 drivers/net/virtio_net.c:841
virtnet_receive drivers/net/virtio_net.c:1087 [inline]
virtnet_poll+0x304/0xad0 drivers/net/virtio_net.c:1168
napi_poll net/core/dev.c:5537 [inline]
net_rx_action+0x792/0x1910 net/core/dev.c:5603
__do_softirq+0x2bb/0xbd0 kernel/softirq.c:284
invoke_softirq kernel/softirq.c:364 [inline]
irq_exit+0x1d3/0x210 kernel/softirq.c:405
exiting_irq arch/x86/include/asm/apic.h:638 [inline]
do_IRQ+0xf6/0x190 arch/x86/kernel/irq.c:253
common_interrupt+0x9d/0x9d arch/x86/entry/entry_64.S:598
</IRQ>
RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:787 [inline]
RIP: 0010:__do_page_fault+0x3b0/0xb60 arch/x86/mm/fault.c:1353
RSP: 0000:ffff8801ca267d80 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff6e
RAX: ffff8801ca30a380 RBX: 0000000000000004 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff85ac97f8
RBP: ffff8801ca267de0 R08: 00007fe5cd76d700 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801ca267f58
R13: ffff8801caa907c0 R14: ffff8801ca30a380 R15: ffff8801ca267fe0
do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1520
page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1066
RIP: 0033:0x4070c5
RSP: 002b:00007fe5cd76cdd8 EFLAGS: 00010202
RAX: 00000000006dbac0 RBX: 00007fe5cd76d700 RCX: ffffffffffffffe8
RDX: 00000000004b5180 RSI: 00007fe5cd76ce70 RDI: 00007fe5cd76d700
RBP: 0000000000000000 R08: 00007fe5cd76d700 R09: 00007fe5cd76d700
R10: 00007fe5cd76d9d0 R11: 0000000000000202 R12: 0000000000000000
R13: 00007fff94a3887f R14: 00007fe5cd76d9c0 R15: 0000000000000000
Allocated by task 4502:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x43/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
kmem_cache_alloc_trace+0x136/0x750 mm/slab.c:3627
kmalloc include/linux/slab.h:493 [inline]
kzalloc include/linux/slab.h:666 [inline]
fanout_add+0xa50/0x1190 net/packet/af_packet.c:1733
packet_setsockopt+0xfdc/0x1e80 net/packet/af_packet.c:3795
SYSC_setsockopt net/socket.c:1852 [inline]
SyS_setsockopt+0x189/0x360 net/socket.c:1831
entry_SYSCALL_64_fastpath+0x1f/0xbe
Freed by task 4489:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x43/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3503 [inline]
kfree+0xca/0x250 mm/slab.c:3820
packet_release+0xa8f/0xd70 net/packet/af_packet.c:3033
sock_release+0x8d/0x1e0 net/socket.c:597
sock_close+0x16/0x20 net/socket.c:1126
__fput+0x333/0x7f0 fs/file_table.c:210
____fput+0x15/0x20 fs/file_table.c:244
task_work_run+0x199/0x270 kernel/task_work.c:112
exit_task_work include/linux/task_work.h:21 [inline]
do_exit+0xa52/0x1b40 kernel/exit.c:865
do_group_exit+0x149/0x400 kernel/exit.c:968
SYSC_exit_group kernel/exit.c:979 [inline]
SyS_exit_group+0x1d/0x20 kernel/exit.c:977
entry_SYSCALL_64_fastpath+0x1f/0xbe
The buggy address belongs to the object at ffff8801ca046e00
which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 2176 bytes inside of
4096-byte region [ffff8801ca046e00, ffff8801ca047e00)
The buggy address belongs to the page:
page:ffffea0007281180 count:1 mapcount:0 mapping:ffff8801ca046e00 index:0x0 compound_mapcount: 0
flags: 0x200000000008100(slab|head)
raw: 0200000000008100 ffff8801ca046e00 0000000000000000 0000000100000001
raw: ffffea0007281120 ffffea0007280ea0 ffff8801dac00dc0 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8801ca047580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8801ca047600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8801ca047680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8801ca047700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8801ca047780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb