==================================================================
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+0xf9/0x110 drivers/scsi/sg.c:2120
Read of size 8 at addr ffff8801d30b0cc0 by task syzkaller320196/3319

CPU: 0 PID: 3319 Comm: syzkaller320196 Not tainted 4.4.113-gef588ef #33
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 c1b8670818685851 ffff8801d00bf9f0 ffffffff81d0278d
 ffffea00074c2c00 ffff8801d30b0cc0 0000000000000000 ffff8801d30b0cc0
 ffff8801cc6b0238 ffff8801d00bfa28 ffffffff814fd053 ffff8801d30b0cc0
Call Trace:
 [<ffffffff81d0278d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0278d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd053>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fd565>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fd565>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fd6c4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff825b6d79>] list_empty include/linux/list.h:189 [inline]
 [<ffffffff825b6d79>] sg_remove_request+0xf9/0x110 drivers/scsi/sg.c:2120
 [<ffffffff825b72f5>] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1837
 [<ffffffff825b919b>] sg_read+0xa1b/0x1490 drivers/scsi/sg.c:537
 [<ffffffff8151c561>] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680
 [<ffffffff8151e8bd>] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810
 [<ffffffff8151ea38>] vfs_readv+0x78/0xb0 fs/read_write.c:834
 [<ffffffff81520d69>] SYSC_readv fs/read_write.c:860 [inline]
 [<ffffffff81520d69>] SyS_readv+0xd9/0x240 fs/read_write.c:852
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Allocated by task 0:
(stack is not available)

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801d30b0c80
 which belongs to the cache fasync_cache of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff8801d30b0c80, ffff8801d30b0ce0)
The buggy address belongs to the page:
PANIC: double fault, error_code: 0x0
CPU: 0 PID: 3319 Comm: syzkaller320196 Not tainted 4.4.113-gef588ef #33
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d15f2f80 task.stack: ffff8801d00b8000
RIP: 0010:[<ffffffff8148f758>]  [<ffffffff8148f758>] dump_page_badflags+0x8/0x250 mm/debug.c:84
RSP: 0018:ffff880100000000  EFLAGS: 00010046
RAX: ffff8801d15f2f80 RBX: ffffea00074c2c00 RCX: ffffffff8148f8d0
RDX: 0000000000000000 RSI: ffffffff838a8de0 RDI: ffffea00074c2c00
RBP: ffff880100000010 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: fffffbfff0ad7e26 R12: 0000000000000000
R13: ffffffff838a8de0 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fce131cb700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8800fffffff8 CR3: 00000000bbbd4000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:

Call Trace:
 <UNK> 
Code: 00 e9 83 fd ff ff e8 78 df 06 00 e9 50 fd ff ff e8 6e df 06 00 e9 1d fd ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 <41> 55 49 89 f5 41 54 49 89 d4 53 48 89 fb 48 83 ec 08 e8 b1 04