sg_write: data in/out 8454115/514 bytes for SCSI command 0x0-- guessing data in;
   program syzkaller149035 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: 0 PID: 3328 Comm: syzkaller149035 Not tainted 4.9.77-g8788313 #16
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c9471800 task.stack: ffff8801c8f40000
RIP: 0010:[<ffffffff82669a0c>]  [<ffffffff82669a0c>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP: 0010:[<ffffffff82669a0c>]  [<ffffffff82669a0c>] sg_read+0xd0c/0x1440 drivers/scsi/sg.c:520
RSP: 0018:ffff8801c8f47ac0  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff826699d3
RDX: 0000000000000000 RSI: 000000000000001a RDI: ffff8801c9774370
RBP: ffff8801c8f47bc8 R08: 0000000000000000 R09: ffffed0039380bf1
R10: 0000000000000005 R11: ffffed0039380bf0 R12: 0000000000001000
R13: 0000000000000000 R14: ffff8801c9c05f60 R15: ffff8801c9774340
FS:  0000000001678880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020f93fcb CR3: 00000001cd678000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d565b500 ffff8801c8f47af0 ffff8801c9774358 ffff88010000001a
 0000000000000000 ffff8801c9774368 000000000000003e 0000000000000246
 ffff8801d1649400 1ffff100391e8f64 0000000020f93fcb 0000000020f93fef
Call Trace:
 [<ffffffff8156c5c1>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff81570430>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff81570430>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff815706e4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff81570806>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81573cf7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81573cf7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838b2b6e>] entry_SYSCALL_64_fastpath+0x29/0xe8
Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 06 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 df 05 00 00 48 8b 1b 48 85 db 0f 84 51 03 00 
RIP  [<ffffffff82669a0c>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP  [<ffffffff82669a0c>] sg_read+0xd0c/0x1440 drivers/scsi/sg.c:520
 RSP <ffff8801c8f47ac0>
---[ end trace 04c739100ea587d0 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..