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BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata

write to 0xffff888107494d34 of 4 bytes by task 10097 on cpu 1:
 jbd2_journal_dirty_metadata+0x2df/0x670 fs/jbd2/transaction.c:1516
 __ext4_handle_dirty_metadata+0xc6/0x590 fs/ext4/ext4_jbd2.c:331
 __ext4_new_inode+0x10e5/0x2fe0 fs/ext4/ialloc.c:1122
 ext4_symlink+0x2d1/0x780 fs/ext4/namei.c:3347
 vfs_symlink+0xbe/0x170 fs/namei.c:4176
 do_symlinkat+0x11e/0x2b0 fs/namei.c:4206
 __do_sys_symlink fs/namei.c:4227 [inline]
 __se_sys_symlink fs/namei.c:4225 [inline]
 __x64_sys_symlink+0x32/0x40 fs/namei.c:4225
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888107494d34 of 4 bytes by task 10098 on cpu 0:
 jbd2_journal_dirty_metadata+0x15e/0x670 fs/jbd2/transaction.c:1484
 __ext4_handle_dirty_metadata+0xc6/0x590 fs/ext4/ext4_jbd2.c:331
 __ext4_new_inode+0x10e5/0x2fe0 fs/ext4/ialloc.c:1122
 ext4_symlink+0x2d1/0x780 fs/ext4/namei.c:3347
 vfs_symlink+0xbe/0x170 fs/namei.c:4176
 do_symlinkat+0x11e/0x2b0 fs/namei.c:4206
 __do_sys_symlink fs/namei.c:4227 [inline]
 __se_sys_symlink fs/namei.c:4225 [inline]
 __x64_sys_symlink+0x32/0x40 fs/namei.c:4225
 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: 10098 Comm: syz-executor.0 Not tainted 5.12.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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