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: 3379 Comm: syzkaller053553 Not tainted 4.9.70-gc14c7b3 #110
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c99ce000 task.stack: ffff8801c7da8000
RIP: 0010:[<ffffffff826627bc>]  [<ffffffff826627bc>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP: 0010:[<ffffffff826627bc>]  [<ffffffff826627bc>] sg_read+0xd0c/0x1440 drivers/scsi/sg.c:520
RSP: 0018:ffff8801c7dafac0  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff82662783
RDX: 0000000000000000 RSI: 000000000000001a RDI: ffff8801c87b4370
RBP: ffff8801c7dafbc8 R08: 0000000000080000 R09: ffffed003931b19d
R10: 0000000000000005 R11: ffffed003931b19c R12: 0000000000001000
R13: 0000000000000000 R14: ffff8801c98d8cc0 R15: ffff8801c87b4340
FS:  00007f3f2bee5700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020f93fcb CR3: 00000001c8e51000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d15540c0 ffff8801c7dafaf0 ffff8801c87b4358 ffff88010000001a
 0000000000000000 ffff8801c87b4368 000000000000003e 0000000000000246
 ffff8801d14c6280 1ffff10038fb5f64 0000000020f93fcb 0000000020f93fef
Call Trace:
 [<ffffffff81569121>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156cf90>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156cf90>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156d244>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156d366>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81570857>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81570857>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838aa405>] 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 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  [<ffffffff826627bc>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP  [<ffffffff826627bc>] sg_read+0xd0c/0x1440 drivers/scsi/sg.c:520
 RSP <ffff8801c7dafac0>
---[ end trace 40fa2cef09bd25b9 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..