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BUG: KCSAN: data-race in jbd2_journal_commit_transaction / jbd2_journal_get_write_access

write to 0xffff8881448ac800 of 8 bytes by task 4854 on cpu 1:
 jbd2_journal_commit_transaction+0x2982/0x32b0 fs/jbd2/commit.c:1181
 kjournald2+0x263/0x480 fs/jbd2/journal.c:213
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

read to 0xffff8881448ac800 of 8 bytes by task 13181 on cpu 0:
 is_journal_aborted include/linux/jbd2.h:1647 [inline]
 is_handle_aborted include/linux/jbd2.h:1654 [inline]
 jbd2_journal_get_write_access+0x60/0x1c0 fs/jbd2/transaction.c:1201
 __ext4_journal_get_write_access+0x17e/0x2c0 fs/ext4/ext4_jbd2.c:231
 ext4_reserve_inode_write+0x144/0x1f0 fs/ext4/inode.c:5747
 __ext4_mark_inode_dirty+0x6f/0x5e0 fs/ext4/inode.c:5911
 ext4_dirty_inode+0xa6/0xc0 fs/ext4/inode.c:5955
 __mark_inode_dirty+0x72/0x6b0 fs/fs-writeback.c:2262
 mark_inode_dirty include/linux/fs.h:2181 [inline]
 generic_write_end+0x166/0x240 fs/buffer.c:2202
 ext4_da_write_end+0x59b/0x760 fs/ext4/inode.c:3111
 generic_perform_write+0x23e/0x3a0 mm/filemap.c:3419
 ext4_buffered_write_iter+0x2e5/0x3e0 fs/ext4/file.c:270
 ext4_file_write_iter+0x47a/0x1060 fs/ext4/file.c:503
 call_write_iter include/linux/fs.h:1901 [inline]
 aio_write+0x2b4/0x390 fs/aio.c:1581
 __io_submit_one fs/aio.c:1840 [inline]
 io_submit_one+0x67c/0x1270 fs/aio.c:1883
 __do_sys_io_submit fs/aio.c:1942 [inline]
 __se_sys_io_submit+0xf5/0x270 fs/aio.c:1912
 __x64_sys_io_submit+0x3f/0x50 fs/aio.c:1912
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 13181 Comm: syz-executor.5 Not tainted 5.11.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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