syzbot

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BUG: KCSAN: data-race in jbd2_journal_get_write_access / jbd2_journal_update_sb_log_tail

write to 0xffff888103478800 of 8 bytes by task 1402 on cpu 1:
 jbd2_journal_update_sb_log_tail+0x176/0x1b0 fs/jbd2/journal.c:1689
 jbd2_journal_commit_transaction+0x21e/0x3460 fs/jbd2/commit.c:430
 kjournald2+0x263/0x480 fs/jbd2/journal.c:213
 kthread+0x2c7/0x2e0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

read to 0xffff888103478800 of 8 bytes by task 6965 on cpu 0:
 is_journal_aborted include/linux/jbd2.h:1695 [inline]
 is_handle_aborted include/linux/jbd2.h:1702 [inline]
 jbd2_journal_get_write_access+0x60/0x1c0 fs/jbd2/transaction.c:1223
 __ext4_journal_get_write_access+0x177/0x450 fs/ext4/ext4_jbd2.c:233
 ext4_reserve_inode_write+0x14c/0x1f0 fs/ext4/inode.c:5716
 __ext4_mark_inode_dirty+0x85/0x5f0 fs/ext4/inode.c:5882
 __ext4_new_inode+0x2a7f/0x2fc0 fs/ext4/ialloc.c:1343
 ext4_symlink+0x2cc/0x700 fs/ext4/namei.c:3293
 vfs_symlink+0x241/0x330 fs/namei.c:4248
 do_symlinkat+0x104/0x380 fs/namei.c:4277
 __do_sys_symlink fs/namei.c:4299 [inline]
 __se_sys_symlink fs/namei.c:4297 [inline]
 __x64_sys_symlink+0x52/0x60 fs/namei.c:4297
 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: 0x0000000000000038 -> 0x0000000000000230

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 6965 Comm: syz-executor.5 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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