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BUG: KCSAN: data-race in jbd2_journal_commit_transaction / jbd2_log_wait_commit

write to 0xffff8881030d2c68 of 4 bytes by task 1404 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 0xffff8881030d2c68 of 4 bytes by task 18317 on cpu 0:
 jbd2_log_wait_commit+0x13d/0x210 fs/jbd2/journal.c:712
 jbd2_complete_transaction+0xfb/0x110 fs/jbd2/journal.c:846
 ext4_fc_commit+0x231/0x1360 fs/ext4/fast_commit.c:1217
 ext4_fsync_journal fs/ext4/fsync.c:115 [inline]
 ext4_sync_file+0x336/0x6e0 fs/ext4/fsync.c:174
 vfs_fsync_range+0x107/0x120 fs/sync.c:182
 generic_write_sync include/linux/fs.h:2956 [inline]
 ext4_buffered_write_iter+0x322/0x380 fs/ext4/file.c:277
 ext4_file_write_iter+0x2e7/0x1200
 __kernel_write+0x32e/0x5e0 fs/read_write.c:535
 do_acct_process+0xb4d/0xd40 kernel/acct.c:518
 slow_acct_process kernel/acct.c:577 [inline]
 acct_process+0x1ad/0x250 kernel/acct.c:601
 do_exit+0x612/0x17a0 kernel/exit.c:822
 do_group_exit+0xce/0x180 kernel/exit.c:929
 get_signal+0xfc3/0x1550 kernel/signal.c:2852
 arch_do_signal_or_restart+0x8c/0x2e0 arch/x86/kernel/signal.c:868
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x113/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000ac7 -> 0x00000ac8

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 18317 Comm: syz-executor.0 Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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