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: 3238 Comm: syzkaller762866 Not tainted 4.9.60-gdfe0a9b #81
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cf0d8000 task.stack: ffff8801c7d08000
RIP: 0010:[<ffffffff82661f31>]  [<ffffffff82661f31>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP: 0010:[<ffffffff82661f31>]  [<ffffffff82661f31>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
RSP: 0018:ffff8801c7d0fac0  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c
RDX: 0000000000000000 RSI: 00000000000000a8 RDI: ffff8801d5b14370
RBP: ffff8801c7d0fbc8 R08: 8551c99c2a45b4bd R09: ffffed003b351005
R10: 0000000000000005 R11: ffffed003b351004 R12: 0000000000001000
R13: 0000000000000000 R14: ffff8801d9a88000 R15: ffff8801d5b14340
FS:  0000000000c3f880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000205f2f80 CR3: 00000001c76e3000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d5b6b040 ffff8801c7d0faf0 ffff8801d5b14358 ffff8801000000a8
 0000000000000000 ffff8801d5b14368 00000000000000cc 0000000000000246
 ffff8801d1b9f180 1ffff10038fa1f64 00000000200c1000 00000000200c1024
Call Trace:
 [<ffffffff8156ab91>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156e950>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156e950>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156ec04>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156ed26>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff815721a7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff815721a7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838aa305>] 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  [<ffffffff82661f31>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP  [<ffffffff82661f31>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
 RSP <ffff8801c7d0fac0>
---[ end trace db23c6e8b3c92a7f ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..