syzbot

kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 5675 Comm: syzkaller068865 Not tainted 4.9.85-g4c4262a #47
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d56e6000 task.stack: ffff8801bccc0000
RIP: 0010:[<ffffffff81dfcfe6>]  [<ffffffff81dfcfe6>] __list_del_entry+0x86/0x1d0 lib/list_debug.c:57
RSP: 0018:ffff8801bccc7958  EFLAGS: 00010046
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8801ba490158
RDX: 0000000000000000 RSI: 00000000634392c5 RDI: ffff8801ba490160
RBP: ffff8801bccc7970 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000004 R11: ffff8801d56e6000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000282 R15: ffff8801ba490000
FS:  00007fb239934700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb239912e78 CR3: 00000001c955e000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801ba490190 ffff8801ba490158 ffff8801ba490158 ffff8801bccc7988
 ffffffff81dfd13d ffff8801ba490060 ffff8801bccc79b8 ffffffff82668ce3
 ffff8801ba490158 0000000020000240 1ffff10037998f41 ffff8801ba490190
Call Trace:
 [<ffffffff81dfd13d>] list_del+0xd/0x70 lib/list_debug.c:77
 [<ffffffff82668ce3>] sg_remove_request+0xa3/0x120 drivers/scsi/sg.c:2114
 [<ffffffff82671999>] sg_new_write.isra.26+0x849/0x940 drivers/scsi/sg.c:713
 [<ffffffff82673188>] sg_ioctl+0x16f8/0x2a00 drivers/scsi/sg.c:889
 [<ffffffff815ae90a>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff815ae90a>] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679
 [<ffffffff815af92f>] SYSC_ioctl fs/ioctl.c:694 [inline]
 [<ffffffff815af92f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b5413>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: c4 0f 84 94 00 00 00 48 b8 00 02 00 00 00 00 ad de 48 39 c3 0f 84 a5 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 e8 00 00 00 4c 8b 03 49 39 c8 0f 85 9b 00 00 
RIP  [<ffffffff81dfcfe6>] __list_del_entry+0x86/0x1d0 lib/list_debug.c:57
 RSP <ffff8801bccc7958>
---[ end trace 172337917b3a1ce0 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..