program syzkaller257712 not setting count and/or reply_len properly
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: 1 PID: 3231 Comm: syzkaller257712 Not tainted 4.9.52-g9b2b081 #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d5ec8000 task.stack: ffff8801d6560000
RIP: 0010:[<ffffffff82664351>]  [<ffffffff82664351>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP: 0010:[<ffffffff82664351>]  [<ffffffff82664351>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
RSP: 0018:ffff8801d6567ac0  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c
RDX: 0000000000000000 RSI: 0000000000000fdc RDI: ffff8801d9620170
RBP: ffff8801d6567bc8 R08: 0000000000000000 R09: ffffed003a0572c5
R10: 0000000000000005 R11: ffffed003a0572c4 R12: 0000000000001000
R13: 0000000000000000 R14: ffff8801d02b9600 R15: ffff8801d9620140
FS:  000000000153a880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020563000 CR3: 00000001c8620000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffea00075959c0 ffff8801d6567b18 ffff8801d9620158 0000000000000fdc
 ffff8801d6567d50 ffff8801d9620168 0000000000001000 0000000000000246
 ffff8801d1498000 1ffff1003acacf64 0000000020563000 0000000020563024
Call Trace:
 [<ffffffff8156b741>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156f510>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156f510>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156f7c4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156f8e6>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81572ca7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81572ca7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 19 07 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 ed 06 00 00 48 8b 1b 48 85 db 0f 84 51 03 00 
RIP  [<ffffffff82664351>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP  [<ffffffff82664351>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
 RSP <ffff8801d6567ac0>
---[ end trace ad23e15fcc5e587d ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..