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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 ffff8801b95d9140 by task syzkaller873684/3809

CPU: 0 PID: 3809 Comm: syzkaller873684 Not tainted 4.9.85-ge0b05e6 #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d7cefa60 ffffffff81d95739 ffffea0006e57640 ffff8801b95d9140
 0000000000000000 ffff8801b95d9140 ffff8801d87e4438 ffff8801d7cefa98
 ffffffff8153e0d3 ffff8801b95d9140 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81d95739>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d95739>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153e0d3>] print_address_description+0x73/0x280 mm/kasan/report.c:252
 [<ffffffff8153e5f5>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff8153e5f5>] kasan_report+0x275/0x360 mm/kasan/report.c:408
 [<ffffffff8153e754>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff82668d43>] __read_once_size include/linux/compiler.h:243 [inline]
 [<ffffffff82668d43>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff82668d43>] sg_remove_request+0x103/0x120 drivers/scsi/sg.c:2110
 [<ffffffff826692c5>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1827
 [<ffffffff8266b176>] sg_read+0xa16/0x1440 drivers/scsi/sg.c:526
 [<ffffffff8156c083>] __vfs_read+0x103/0x670 fs/read_write.c:449
 [<ffffffff8156ff9e>] vfs_read+0x11e/0x380 fs/read_write.c:472
 [<ffffffff81573c99>] SYSC_read fs/read_write.c:588 [inline]
 [<ffffffff81573c99>] SyS_read+0xd9/0x1b0 fs/read_write.c:581
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b5413>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Allocated by task 0:
(stack is not available)

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801b95d9100
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801b95d9100, ffff8801b95d9160)
The buggy address belongs to the page:
page:ffffea0006e57640 count:1 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000080(slab)
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801b95d9000: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 ffff8801b95d9080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801b95d9100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                           ^
 ffff8801b95d9180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801b95d9200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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