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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:4401
Read of size 2 at addr ffff8801c6c27680 by task syzkaller045818/28464
CPU: 0 PID: 28464 Comm: syzkaller045818 Not tainted 4.13.0-rc7+ #35
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:4401
__netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4456
netif_receive_skb_internal+0x10b/0x5e0 net/core/dev.c:4527
napi_skb_finish net/core/dev.c:4888 [inline]
napi_gro_receive+0x3d0/0x500 net/core/dev.c:4919
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:5530 [inline]
net_rx_action+0x792/0x1910 net/core/dev.c:5596
__do_softirq+0x2f5/0xba3 kernel/softirq.c:284
invoke_softirq kernel/softirq.c:364 [inline]
irq_exit+0x1cc/0x200 kernel/softirq.c:405
exiting_irq arch/x86/include/asm/apic.h:638 [inline]
do_IRQ+0xf6/0x190 arch/x86/kernel/irq.c:256
common_interrupt+0x93/0x93 arch/x86/entry/entry_64.S:513
RIP: 0010:__handle_mm_fault+0x5ad/0x3860 mm/memory.c:3797
RSP: 0000:ffff8801d33ffbe8 EFLAGS: 00000207 ORIG_RAX: ffffffffffffff6e
RAX: 0000000000000000 RBX: ffff8801d529de08 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffffed003a67ffb8
RBP: ffff8801d33ffe08 R08: 0000000000000001 R09: 1ffff1003a67ff5b
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8801c6563000
R13: 1ffff1003a67ff88 R14: ffff8801d33ffd40 R15: ffff8801d33ffde0
</IRQ>
handle_mm_fault+0x3bb/0x860 mm/memory.c:3906
__do_page_fault+0x4f6/0xb60 arch/x86/mm/fault.c:1445
do_page_fault+0x54/0x70 arch/x86/mm/fault.c:1508
page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1007
RIP: 0033:0x4490cd
RSP: 002b:00007ffdabbffd48 EFLAGS: 00010202
RAX: ffffffffffffffea RBX: 00007fbc335c2700 RCX: 00007fbc335c2700
RDX: 00000000003d0f00 RSI: 00007fbc335c1e70 RDI: 00000000004028e0
RBP: 00007ffdabbffe00 R08: 00007fbc335c29d0 R09: 00007fbc335c2700
R10: 00007fbc335c1e80 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdabbffdff R14: 00007fbc335c29c0 R15: 0000000000000000
Allocated by task 28325:
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+0x12f/0x740 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 28424:
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+0x327/0x7e0 fs/file_table.c:210
____fput+0x15/0x20 fs/file_table.c:246
task_work_run+0x18a/0x260 kernel/task_work.c:116
exit_task_work include/linux/task_work.h:21 [inline]
do_exit+0xa3a/0x1b10 kernel/exit.c:865
do_group_exit+0x149/0x400 kernel/exit.c:969
SYSC_exit_group kernel/exit.c:980 [inline]
SyS_exit_group+0x1d/0x20 kernel/exit.c:978
entry_SYSCALL_64_fastpath+0x1f/0xbe
The buggy address belongs to the object at ffff8801c6c26e00
which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 2176 bytes inside of
4096-byte region [ffff8801c6c26e00, ffff8801c6c27e00)
The buggy address belongs to the page:
page:ffffea00071b0980 count:1 mapcount:0 mapping:ffff8801c6c26e00 index:0x0 compound_mapcount: 0
flags: 0x200000000008100(slab|head)
raw: 0200000000008100 ffff8801c6c26e00 0000000000000000 0000000100000001
raw: ffffea00071cb220 ffffea00071b76a0 ffff8801dac00dc0 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8801c6c27580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8801c6c27600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8801c6c27680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8801c6c27700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8801c6c27780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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