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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 ffff8801c9349140 by task syzkaller137826/4063

CPU: 0 PID: 4063 Comm: syzkaller137826 Not tainted 4.9.79-g71f1469 #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801b25bf9b0 ffffffff81d94829 ffffea000724d240 ffff8801c9349140
 0000000000000000 ffff8801c9349140 ffff8801d504a338 ffff8801b25bf9e8
 ffffffff8153e083 ffff8801c9349140 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81d94829>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d94829>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153e083>] print_address_description+0x73/0x280 mm/kasan/report.c:252
 [<ffffffff8153e5a5>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff8153e5a5>] kasan_report+0x275/0x360 mm/kasan/report.c:408
 [<ffffffff8153e704>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff82667ab3>] __read_once_size include/linux/compiler.h:243 [inline]
 [<ffffffff82667ab3>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff82667ab3>] sg_remove_request+0x103/0x120 drivers/scsi/sg.c:2110
 [<ffffffff82668035>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1827
 [<ffffffff82669ee6>] sg_read+0xa16/0x1440 drivers/scsi/sg.c:526
 [<ffffffff8156cab1>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff81570920>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff81570920>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff81570bd4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff81570cf6>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff815741e7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff815741e7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838b346e>] 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 ffff8801c9349100
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801c9349100, ffff8801c9349160)
The buggy address belongs to the page:
page:ffffea000724d240 count:1 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000080(slab)
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c9349000: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 ffff8801c9349080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801c9349100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                           ^
 ffff8801c9349180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801c9349200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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