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BUG: KCSAN: data-race in jbd2_journal_unlock_updates / start_this_handle

write to 0xffff888102b28854 of 4 bytes by task 25626 on cpu 1:
 jbd2_journal_unlock_updates+0x59/0xa0 fs/jbd2/transaction.c:912
 __ext4_ioctl fs/ext4/ioctl.c:939 [inline]
 ext4_ioctl+0x110a/0x2190 fs/ext4/ioctl.c:1279
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860
 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

read to 0xffff888102b28854 of 4 bytes by task 25628 on cpu 0:
 start_this_handle+0x392/0x1250 fs/jbd2/transaction.c:404
 jbd2__journal_start+0x1fc/0x3b0 fs/jbd2/transaction.c:525
 __ext4_journal_start_sb+0x159/0x2d0 fs/ext4/ext4_jbd2.c:105
 __ext4_new_inode+0xd9c/0x2fd0 fs/ext4/ialloc.c:1080
 ext4_symlink+0x2cc/0x700 fs/ext4/namei.c:3293
 vfs_symlink+0x23f/0x350 fs/namei.c:4250
 do_symlinkat+0x104/0x380 fs/namei.c:4279
 __do_sys_symlink fs/namei.c:4301 [inline]
 __se_sys_symlink fs/namei.c:4299 [inline]
 __x64_sys_symlink+0x52/0x60 fs/namei.c:4299
 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: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 25628 Comm: syz-executor.3 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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