==================================================================
BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:243 [inline]
BUG: KASAN: slab-out-of-bounds in list_empty include/linux/list.h:189 [inline]
BUG: KASAN: slab-out-of-bounds in sg_remove_request+0x103/0x120 drivers/scsi/sg.c:2110
Read of size 8 at addr ffff8801cb230140 by task syzkaller866364/3322

CPU: 0 PID: 3322 Comm: syzkaller866364 Not tainted 4.9.78-gf518fe4 #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c9b5fab0 ffffffff81d943a9 ffffea00072c8c00 ffff8801cb230140
 0000000000000000 ffff8801cb230140 ffff8801c8de2338 ffff8801c9b5fae8
 ffffffff8153dc23 ffff8801cb230140 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81d943a9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d943a9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153dc23>] print_address_description+0x73/0x280 mm/kasan/report.c:252
 [<ffffffff8153e145>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff8153e145>] kasan_report+0x275/0x360 mm/kasan/report.c:408
 [<ffffffff8153e2a4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff82667543>] __read_once_size include/linux/compiler.h:243 [inline]
 [<ffffffff82667543>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff82667543>] sg_remove_request+0x103/0x120 drivers/scsi/sg.c:2110
 [<ffffffff82667ac5>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1827
 [<ffffffff82669976>] sg_read+0xa16/0x1440 drivers/scsi/sg.c:526
 [<ffffffff8156ba73>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156f80e>] vfs_read+0x11e/0x380 fs/read_write.c:475
 [<ffffffff81573539>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff81573539>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838b2c6e>] entry_SYSCALL_64_fastpath+0x29/0xe8

Allocated by task 0:
(stack is not available)

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801cb230100
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801cb230100, ffff8801cb230160)
The buggy address belongs to the page:
page:ffffea00072c8c00 count:1 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000080(slab)
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801cb230000: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 ffff8801cb230080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801cb230100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                           ^
 ffff8801cb230180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801cb230200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================