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BUG: KCSAN: data-race in __ext4_unlink / __ext4_update_other_inode_time

write to 0xffff888106388748 of 8 bytes by task 1117 on cpu 1:
 __ext4_unlink+0x330/0x4e0 fs/ext4/namei.c:3196
 ext4_unlink+0x1eb/0x340 fs/ext4/namei.c:3231
 vfs_unlink+0x275/0x4b0 fs/namei.c:4102
 do_unlinkat+0x278/0x540 fs/namei.c:4169
 __do_sys_unlink fs/namei.c:4217 [inline]
 __se_sys_unlink fs/namei.c:4215 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4215
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888106388748 of 8 bytes by task 9262 on cpu 0:
 ext4_encode_extra_time fs/ext4/ext4.h:896 [inline]
 __ext4_update_other_inode_time+0x18b/0x5c0 fs/ext4/inode.c:4983
 ext4_update_other_inodes_time fs/ext4/inode.c:5015 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5149 [inline]
 ext4_mark_iloc_dirty+0x1286/0x1700 fs/ext4/inode.c:5741
 ext4_xattr_set_handle+0xf77/0x1120 fs/ext4/xattr.c:2402
 ext4_initxattrs+0x66/0xb0 fs/ext4/xattr_security.c:44
 security_inode_init_security+0x1a9/0x260 security/security.c:1099
 ext4_init_security+0x30/0x40 fs/ext4/xattr_security.c:58
 __ext4_new_inode+0x2a0a/0x2fd0 fs/ext4/ialloc.c:1325
 ext4_mkdir+0x28a/0x760 fs/ext4/namei.c:2929
 vfs_mkdir+0x2c3/0x3e0 fs/namei.c:3885
 do_mkdirat+0x12e/0x2c0 fs/namei.c:3911
 __do_sys_mkdir fs/namei.c:3931 [inline]
 __se_sys_mkdir fs/namei.c:3929 [inline]
 __x64_sys_mkdir+0x40/0x50 fs/namei.c:3929
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x000000003b8607f9 -> 0x000000000417717b

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 9262 Comm: syz-executor.1 Not tainted 5.15.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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