syzbot

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BUG: KCSAN: data-race in ext4_mark_iloc_dirty / ext4_orphan_del

write to 0xffff888010d831bc of 4 bytes by task 8414 on cpu 1:
 ext4_orphan_del+0x2fc/0x4a0 fs/ext4/namei.c:3094
 ext4_evict_inode+0xb90/0xef0 fs/ext4/inode.c:319
 evict+0x1aa/0x410 fs/inode.c:578
 iput_final fs/inode.c:1654 [inline]
 iput+0x3fd/0x520 fs/inode.c:1680
 do_unlinkat+0x2e9/0x4f0 fs/namei.c:4103
 __do_sys_unlink fs/namei.c:4143 [inline]
 __se_sys_unlink fs/namei.c:4141 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4141
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888010d831bc of 4 bytes by task 8408 on cpu 0:
 ext4_do_update_inode fs/ext4/inode.c:5081 [inline]
 ext4_mark_iloc_dirty+0x889/0x16f0 fs/ext4/inode.c:5724
 ext4_orphan_add+0x3f0/0x5f0 fs/ext4/namei.c:3001
 __ext4_unlink+0x4bc/0x6c0 fs/ext4/namei.c:3249
 ext4_unlink+0x1f1/0x3f0 fs/ext4/namei.c:3285
 vfs_unlink+0x24a/0x3e0 fs/namei.c:4029
 do_unlinkat+0x29f/0x4f0 fs/namei.c:4096
 __do_sys_unlink fs/namei.c:4143 [inline]
 __se_sys_unlink fs/namei.c:4141 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4141
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8408 Comm: syz-executor.0 Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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