kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 1376 Comm: syz-executor2 Not tainted 4.17.0-rc4+ #24
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:sockfs_setattr+0xbc/0x140 net/socket.c:540
RSP: 0018:ffff88008dd27c38 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88008dd27d80 RCX: ffffffff83c13c1e
RDX: 0000000000000075 RSI: ffffc90001845000 RDI: 00000000000003a8
RBP: ffff88008dd27c50 R08: ffffed0016611e38 R09: 0000000000000001
R10: ffffed0016611e37 R11: ffff8800b308f1bb R12: 0000000000000000
R13: 0000000000000000 R14: ffff88009dc4a4a0 R15: 0000000000000000
FS:  00007f0f69c95700(0000) GS:ffff880104e80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31221000 CR3: 000000009a4e8001 CR4: 00000000001606e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 notify_change+0x93c/0xd30 fs/attr.c:313
 chown_common+0x46b/0x520 fs/open.c:643
 do_fchownat+0x164/0x190 fs/open.c:673
 __do_sys_fchownat fs/open.c:688 [inline]
 __se_sys_fchownat fs/open.c:685 [inline]
 __x64_sys_fchownat+0xbe/0x150 fs/open.c:685
 do_syscall_64+0xda/0x560 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a09
RSP: 002b:00007f0f69c94c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000104
RAX: ffffffffffffffda RBX: 00007f0f69c956d4 RCX: 0000000000455a09
RDX: 000000000000fffe RSI: 0000000020000040 RDI: 0000000000000015
RBP: 000000000072bea0 R08: 0000000000001000 R09: 0000000000000000
R10: 000000000000fffe R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000085 R14: 00000000006f4d18 R15: 0000000000000000
Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 87 00 00 00 4d 8b 6d f0 48 b8 00 00 00 00 00 fc ff df 49 8d bd a8 03 00 00 4
8 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 47 48 8d 7b 08 48 b8 00 00 00
RIP: sockfs_setattr+0xbc/0x140 net/socket.c:540 RSP: ffff88008dd27c38
---[ end trace fd608be4d4b9df79 ]---