audit: type=1400 audit(1521209773.501:14): avc:  denied  { write } for  pid=6220 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
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: 6214 Comm: syz-executor5 Not tainted 4.9.87-gfc8bd0f #6
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d048b000 task.stack: ffff8801d0f88000
RIP: 0010:[<ffffffff8266944b>]  [<ffffffff8266944b>] sg_remove_scat.isra.19+0x17b/0x2d0 drivers/scsi/sg.c:1939
RSP: 0018:ffff8801d0f8fac0  EFLAGS: 00010202
RAX: 1ffff1003a60602d RBX: ffff8801d3030158 RCX: 0000000000000001
RDX: 0000000000000008 RSI: ffffc900032ea000 RDI: ffff8801cfdacff4
RBP: ffff8801d0f8fb10 R08: 0000000000000000 R09: ffffed00374d7b19
R10: 0000000000000005 R11: ffffed00374d7b18 R12: 0000000000000001
R13: 0000000000000008 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f6fceb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000008340008 CR3: 00000001d984c000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d3030170 ffffed003a60602b ffffed003a60602e ffff8801d3030168
 ffff8801cfdacfd8 ffff8801d3030140 0000000000000000 0000000000000000
 0000000000000000 ffff8801d3030238 ffff8801d0f8fb50 ffffffff82669855
Call Trace:
 [<ffffffff82669855>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1825
 [<ffffffff8266b6e6>] sg_read+0xa16/0x1440 drivers/scsi/sg.c:526
 [<ffffffff8156c4b3>] __vfs_read+0x103/0x670 fs/read_write.c:449
 [<ffffffff815703ce>] vfs_read+0x11e/0x380 fs/read_write.c:472
 [<ffffffff815740c9>] SYSC_read fs/read_write.c:588 [inline]
 [<ffffffff815740c9>] SyS_read+0xd9/0x1b0 fs/read_write.c:581
 [<ffffffff81006f95>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006f95>] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387
 [<ffffffff838b8250>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Code: 45 b8 eb 3e e8 67 22 d0 fe 48 8b 45 c8 48 c1 e8 03 42 80 3c 38 00 0f 85 3a 01 00 00 4c 8b 73 10 4b 8d 14 2e 48 89 d1 48 c1 e9 03 <42> 80 3c 39 00 0f 85 0b 01 00 00 48 8b 12 49 83 c5 08 48 85 d2 
RIP  [<ffffffff8266944b>] sg_remove_scat.isra.19+0x17b/0x2d0 drivers/scsi/sg.c:1939
 RSP <ffff8801d0f8fac0>
---[ end trace 92b82cc73deac800 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..