loop4: detected capacity change from 0 to 131456
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BUG: KCSAN: data-race in jbd2_journal_commit_transaction / jbd2_log_wait_commit

write to 0xffff888102a19468 of 4 bytes by task 347 on cpu 1:
 jbd2_journal_commit_transaction+0x2a77/0x3460 fs/jbd2/commit.c:1154
 kjournald2+0x263/0x480 fs/jbd2/journal.c:213
 kthread+0x2c7/0x2e0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

read to 0xffff888102a19468 of 4 bytes by task 4705 on cpu 0:
 jbd2_log_wait_commit+0x100/0x210 fs/jbd2/journal.c:712
 jbd2_journal_stop+0x522/0x6a0 fs/jbd2/transaction.c:1932
 __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+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000b64f -> 0x0000b650

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 4705 Comm: syz-executor.4 Tainted: G        W         5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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EXT4-fs (loop4): revision level too high, forcing read-only mode