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: 3261 Comm: syzkaller039545 Not tainted 4.9.61-ga93e312 #85
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cd649800 task.stack: ffff8801cb630000
RIP: 0010:[<ffffffff826621b1>]  [<ffffffff826621b1>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP: 0010:[<ffffffff826621b1>]  [<ffffffff826621b1>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
RSP: 0018:ffff8801cb637ac0  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c
RDX: 0000000000000000 RSI: 0000000000000093 RDI: ffff8801cb638170
RBP: ffff8801cb637bc8 R08: 0000000000000000 R09: ffffed003a2bf8b9
R10: 0000000000000005 R11: ffffed003a2bf8b8 R12: 0000000000001000
R13: 0000000000000000 R14: ffff8801d15fc5a0 R15: ffff8801cb638140
FS:  00007fb769677700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020c7d000 CR3: 00000001ca9e0000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d57126c0 ffff8801cb637af0 ffff8801cb638158 ffff880100000093
 0000000000000000 ffff8801cb638168 00000000000000b7 0000000000000246
 ffff8801d1bbea00 1ffff100396c6f64 0000000020c7d000 0000000020c7d024
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  [<ffffffff826621b1>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP  [<ffffffff826621b1>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
 RSP <ffff8801cb637ac0>
---[ end trace e75d1f1f1c2b37f8 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..