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BUG: KCSAN: data-race in jbd2_journal_stop / jbd2_journal_stop

write to 0xffff8881028cb4f8 of 4 bytes by task 23742 on cpu 0:
 jbd2_journal_stop+0x2e6/0x6a0 fs/jbd2/transaction.c:1874
 __ext4_journal_stop+0x99/0x110 fs/ext4/ext4_jbd2.c:127
 ext4_mkdir+0x2e0/0x760 fs/ext4/namei.c:2970
 vfs_mkdir+0x2c8/0x3d0 fs/namei.c:3883
 do_mkdirat+0x12e/0x2c0 fs/namei.c:3909
 __do_sys_mkdir fs/namei.c:3929 [inline]
 __se_sys_mkdir fs/namei.c:3927 [inline]
 __x64_sys_mkdir+0x40/0x50 fs/namei.c:3927
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881028cb4f8 of 4 bytes by task 23536 on cpu 1:
 jbd2_journal_stop+0x297/0x6a0 fs/jbd2/transaction.c:1870
 __ext4_journal_stop+0x99/0x110 fs/ext4/ext4_jbd2.c:127
 ext4_mkdir+0x2e0/0x760 fs/ext4/namei.c:2970
 vfs_mkdir+0x2c8/0x3d0 fs/namei.c:3883
 do_mkdirat+0x12e/0x2c0 fs/namei.c:3909
 __do_sys_mkdir fs/namei.c:3929 [inline]
 __se_sys_mkdir fs/namei.c:3927 [inline]
 __x64_sys_mkdir+0x40/0x50 fs/namei.c:3927
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000071a -> 0x00005cbe

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 23536 Comm: syz-executor.5 Tainted: G        W         5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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