==================================================================
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 ffff8801c7edadc0 by task syz-executor0/12684
CPU: 1 PID: 12684 Comm: syz-executor0 Not tainted 4.14.0-rc1+ #1
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
TCP: request_sock_TCPv6: Possible SYN flooding on port 20021. Sending cookies. Check SNMP counters.
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_restore arch/x86/include/asm/paravirt.h:777 [inline]
RIP: 0010:lock_release+0x69b/0xd70 kernel/locking/lockdep.c:4024
RSP: 0018:ffff8801b3b46c20 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff1e
RAX: dffffc0000000000 RBX: 1ffff10036768d89 RCX: ffff8801c5ebe978
RDX: 1ffffffff0b59335 RSI: 0000000000000002 RDI: 0000000000000282
RBP: ffff8801b3b46dd0 R08: 0000000000000000 R09: 1ffff10036768d95
R10: ffff8801c5ebe080 R11: 0000000000000001 R12: ffff8801b3b46ca8
R13: ffff8801c5ebe080 R14: 16fb0df9f74494d6 R15: 0000000000000003
rcu_lock_release include/linux/rcupdate.h:249 [inline]
rcu_read_unlock include/linux/rcupdate.h:686 [inline]
__unlock_page_memcg+0x72/0x100 mm/memcontrol.c:1697
unlock_page_memcg+0x2c/0x40 mm/memcontrol.c:1706
page_remove_file_rmap mm/rmap.c:1244 [inline]
page_remove_rmap+0x3b7/0xcb0 mm/rmap.c:1295
TCP: request_sock_TCPv6: Possible SYN flooding on port 20021. Sending cookies. Check SNMP counters.
zap_pte_range mm/memory.c:1333 [inline]
zap_pmd_range mm/memory.c:1437 [inline]
zap_pud_range mm/memory.c:1466 [inline]
zap_p4d_range mm/memory.c:1487 [inline]
unmap_page_range+0xfc3/0x22e0 mm/memory.c:1508
unmap_single_vma+0x15f/0x2d0 mm/memory.c:1553
unmap_vmas+0xf1/0x1b0 mm/memory.c:1583
exit_mmap+0x232/0x530 mm/mmap.c:3003
__mmput kernel/fork.c:924 [inline]
mmput+0x223/0x6d0 kernel/fork.c:945
exit_mm kernel/exit.c:544 [inline]
do_exit+0x9a1/0x1b40 kernel/exit.c:852
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
do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline]
do_fast_syscall_32+0x3f2/0xeed arch/x86/entry/common.c:391
entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
RIP: 0023:0xf7f75c79
RSP: 002b:000000000846f9bc EFLAGS: 00000206 ORIG_RAX: 00000000000000fc
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 12667:
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
compat_packet_setsockopt+0xe1/0x140 net/packet/af_packet.c:3967
C_SYSC_setsockopt net/compat.c:396 [inline]
compat_SyS_setsockopt+0x17c/0x410 net/compat.c:379
do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline]
do_fast_syscall_32+0x3f2/0xeed arch/x86/entry/common.c:391
entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
Freed by task 12671:
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
get_signal+0x7e8/0x17e0 kernel/signal.c:2334
do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808
exit_to_usermode_loop+0x224/0x300 arch/x86/entry/common.c:158
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:266 [inline]
do_syscall_32_irqs_on arch/x86/entry/common.c:335 [inline]
do_fast_syscall_32+0x83e/0xeed arch/x86/entry/common.c:391
entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
The buggy address belongs to the object at ffff8801c7eda540
which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 2176 bytes inside of
4096-byte region [ffff8801c7eda540, ffff8801c7edb540)
The buggy address belongs to the page:
page:ffffea00071fb680 count:1 mapcount:0 mapping:ffff8801c7eda540 index:0x0 compound_mapcount: 0
flags: 0x200000000008100(slab|head)
raw: 0200000000008100 ffff8801c7eda540 0000000000000000 0000000100000001
raw: ffffea000765aca0 ffffea00073ceea0 ffff8801dac00dc0 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8801c7edac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8801c7edad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8801c7edad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8801c7edae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8801c7edae80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================