syzbot

==================================================================
BUG: KCSAN: data-race in jbd2_journal_stop / jbd2_journal_stop

write to 0xffff8881042f9cf8 of 4 bytes by task 26888 on cpu 0:
 jbd2_journal_stop+0x2e6/0x6a0 fs/jbd2/transaction.c:1874
 __ext4_journal_stop+0x99/0x110 fs/ext4/ext4_jbd2.c:127
 ext4_symlink+0x4db/0x700 fs/ext4/namei.c:3365
 vfs_symlink+0x18a/0x280 fs/namei.c:4299
 do_symlinkat+0x104/0x380 fs/namei.c:4328
 __do_sys_symlink fs/namei.c:4350 [inline]
 __se_sys_symlink fs/namei.c:4348 [inline]
 __x64_sys_symlink+0x52/0x60 fs/namei.c:4348
 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

read to 0xffff8881042f9cf8 of 4 bytes by task 1839 on cpu 1:
 jbd2_journal_stop+0x297/0x6a0 fs/jbd2/transaction.c:1870
 __ext4_journal_stop+0x99/0x110 fs/ext4/ext4_jbd2.c:127
 ext4_mkdir+0x2e0/0x760 fs/ext4/namei.c:2970
 vfs_mkdir+0x216/0x320 fs/namei.c:3933
 do_mkdirat+0x12e/0x2c0 fs/namei.c:3959
 __do_sys_mkdir fs/namei.c:3979 [inline]
 __se_sys_mkdir fs/namei.c:3977 [inline]
 __x64_sys_mkdir+0x40/0x50 fs/namei.c:3977
 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: 0x0000071d -> 0x00006908

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1839 Comm: syz-executor.2 Tainted: G        W         5.17.0-rc2-syzkaller-00064-gc36c04c2e132 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================