syzbot

==================================================================
BUG: KCSAN: data-race in HAS_UNMAPPED_ID / setattr_copy

write to 0xffff88813c6d2770 of 4 bytes by task 3219 on cpu 0:
 i_gid_update include/linux/fs.h:1400 [inline]
 setattr_copy+0x10b/0x240 fs/attr.c:308
 shmem_setattr+0x161/0x4e0 mm/shmem.c:1135
 notify_change+0x8c3/0x930 fs/attr.c:482
 chown_common+0x2ac/0x3f0 fs/open.c:774
 do_fchownat+0x100/0x1a0 fs/open.c:805
 __do_sys_chown fs/open.c:825 [inline]
 __se_sys_chown fs/open.c:823 [inline]
 __x64_sys_chown+0x47/0x50 fs/open.c:823
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88813c6d2770 of 4 bytes by task 3124 on cpu 1:
 i_gid_into_vfsgid include/linux/fs.h:1363 [inline]
 HAS_UNMAPPED_ID+0x8d/0xd0 include/linux/fs.h:1995
 inode_permission+0x138/0x300 fs/namei.c:522
 may_open+0x252/0x340 fs/namei.c:3188
 do_open fs/namei.c:3558 [inline]
 path_openat+0x1757/0x1d00 fs/namei.c:3715
 do_filp_open+0xf6/0x200 fs/namei.c:3742
 do_sys_openat2+0xb5/0x2a0 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_sys_openat fs/open.c:1380 [inline]
 __se_sys_openat fs/open.c:1375 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1375
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000000 -> 0x00000006

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3124 Comm: syz-executor.0 Not tainted 6.3.0-rc7-syzkaller-00043-gaf67688dca57 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
==================================================================