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BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata

write to 0xffff8881074cfd34 of 4 bytes by task 8384 on cpu 0:
 jbd2_journal_dirty_metadata+0x2df/0x670 fs/jbd2/transaction.c:1516
 __ext4_handle_dirty_metadata+0xc6/0x590 fs/ext4/ext4_jbd2.c:331
 ext4_free_inode+0x885/0x9e0 fs/ext4/ialloc.c:347
 ext4_evict_inode+0xbf0/0xef0 fs/ext4/inode.c:333
 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 0xffff8881074cfd34 of 4 bytes by task 30689 on cpu 1:
 jbd2_journal_dirty_metadata+0x15e/0x670 fs/jbd2/transaction.c:1484
 __ext4_handle_dirty_metadata+0xc6/0x590 fs/ext4/ext4_jbd2.c:331
 ext4_free_inode+0x885/0x9e0 fs/ext4/ialloc.c:347
 ext4_evict_inode+0xbf0/0xef0 fs/ext4/inode.c:333
 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

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 30689 Comm: syz-executor.5 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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