==================================================================
BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:276 [inline]
BUG: KASAN: use-after-free in atomic64_read arch/x86/include/asm/atomic64_64.h:21 [inline]
BUG: KASAN: use-after-free in atomic_long_read include/asm-generic/atomic-long.h:44 [inline]
BUG: KASAN: use-after-free in packet_getsockopt+0xc72/0xe00 net/packet/af_packet.c:3934
Read of size 8 at addr ffff8801dade6198 by task syz-executor1/9343

CPU: 1 PID: 9343 Comm: syz-executor1 Not tainted 4.14.0-rc5+ #140
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __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+0x25b/0x340 mm/kasan/report.c:409
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
 __read_once_size include/linux/compiler.h:276 [inline]
 atomic64_read arch/x86/include/asm/atomic64_64.h:21 [inline]
 atomic_long_read include/asm-generic/atomic-long.h:44 [inline]
 packet_getsockopt+0xc72/0xe00 net/packet/af_packet.c:3934
 SYSC_getsockopt net/socket.c:1883 [inline]
 SyS_getsockopt+0x178/0x340 net/socket.c:1865
 do_syscall_64+0x26c/0x8d0 arch/x86/entry/common.c:287
 entry_SYSCALL64_slow_path+0x25/0x25
RIP: 0033:0x452719
RSP: 002b:00007f8501f74be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 0000000000452719
RDX: 0000000000000015 RSI: 0000000000000107 RDI: 0000000000000023
RBP: 000000000000015c R08: 00000000208a5000 R09: 0000000000000000
R10: 0000000020ec8000 R11: 0000000000000212 R12: 00000000006f0140
R13: 00000000ffffffff R14: 00007f8501f756d4 R15: 0000000000000002

Allocated by task 9329:
 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+0x27e/0x1480 net/packet/af_packet.c:1694
 packet_setsockopt+0xfdc/0x1e80 net/packet/af_packet.c:3805
 SYSC_setsockopt net/socket.c:1852 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1831
 do_syscall_64+0x26c/0x8d0 arch/x86/entry/common.c:287
 return_from_SYSCALL_64+0x0/0x7a

Freed by task 9329:
 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
 fanout_add+0x432/0x1480 net/packet/af_packet.c:1772
 packet_setsockopt+0xfdc/0x1e80 net/packet/af_packet.c:3805
 SYSC_setsockopt net/socket.c:1852 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1831
 do_syscall_64+0x26c/0x8d0 arch/x86/entry/common.c:287
 return_from_SYSCALL_64+0x0/0x7a

The buggy address belongs to the object at ffff8801dade6180
 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 24 bytes inside of
 128-byte region [ffff8801dade6180, ffff8801dade6200)
The buggy address belongs to the page:
page:ffffea00076b7980 count:1 mapcount:0 mapping:ffff8801dade6000 index:0xffff8801dade6cc0
flags: 0x200000000000100(slab)
raw: 0200000000000100 ffff8801dade6000 ffff8801dade6cc0 0000000100000012
raw: ffffea00074d45e0 ffff8801dac01538 ffff8801dac00640 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801dade6080: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
 ffff8801dade6100: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff8801dade6180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff8801dade6200: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8801dade6280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================