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BUG: KCSAN: data-race in __ext4_handle_dirty_metadata / jbd2_journal_commit_transaction

write to 0xffff88814486a800 of 8 bytes by task 4811 on cpu 1:
 jbd2_journal_commit_transaction+0x2962/0x3290 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:294

read to 0xffff88814486a800 of 8 bytes by task 13084 on cpu 0:
 is_journal_aborted include/linux/jbd2.h:1647 [inline]
 is_handle_aborted include/linux/jbd2.h:1654 [inline]
 __ext4_handle_dirty_metadata+0x11a/0x590 fs/ext4/ext4_jbd2.c:333
 ext4_do_update_inode fs/ext4/inode.c:5141 [inline]
 ext4_mark_iloc_dirty+0x12f2/0x16f0 fs/ext4/inode.c:5724
 __ext4_mark_inode_dirty+0x4db/0x5e0 fs/ext4/inode.c:5918
 ext4_dirty_inode+0x86/0xa0 fs/ext4/inode.c:5947
 __mark_inode_dirty+0x72/0x6f0 fs/fs-writeback.c:2274
 generic_update_time fs/inode.c:1766 [inline]
 update_time fs/inode.c:1779 [inline]
 file_update_time+0x3a4/0x3e0 fs/inode.c:1995
 ext4_page_mkwrite+0x146/0xf50 fs/ext4/inode.c:6064
 do_page_mkwrite mm/memory.c:2726 [inline]
 do_shared_fault+0x218/0x680 mm/memory.c:4001
 do_fault mm/memory.c:4069 [inline]
 handle_pte_fault mm/memory.c:4316 [inline]
 __handle_mm_fault mm/memory.c:4451 [inline]
 handle_mm_fault+0x12b0/0x1840 mm/memory.c:4549
 do_user_addr_fault+0x60c/0xc00 arch/x86/mm/fault.c:1390
 handle_page_fault arch/x86/mm/fault.c:1475 [inline]
 exc_page_fault+0x94/0x2a0 arch/x86/mm/fault.c:1531
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:577

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 13084 Comm: syz-executor.3 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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