================================================================== BUG: KCSAN: data-race in start_this_handle / start_this_handle write to 0xffff888144325870 of 8 bytes by task 19798 on cpu 0: jbd2_get_transaction fs/jbd2/transaction.c:125 [inline] start_this_handle+0xceb/0x1010 fs/jbd2/transaction.c:400 jbd2__journal_start+0x1fc/0x3f0 fs/jbd2/transaction.c:503 __ext4_journal_start_sb+0x154/0x310 fs/ext4/ext4_jbd2.c:105 __ext4_journal_start fs/ext4/ext4_jbd2.h:320 [inline] ext4_rmdir+0x4f2/0x970 fs/ext4/namei.c:3137 vfs_rmdir+0x135/0x2a0 fs/namei.c:3715 do_rmdir+0x16e/0x300 fs/namei.c:3776 __do_sys_rmdir fs/namei.c:3794 [inline] __se_sys_rmdir fs/namei.c:3792 [inline] __x64_sys_rmdir+0x2c/0x30 fs/namei.c:3792 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888144325870 of 8 bytes by task 4032 on cpu 1: start_this_handle+0x1c1/0x1010 fs/jbd2/transaction.c:352 jbd2__journal_start+0x1fc/0x3f0 fs/jbd2/transaction.c:503 __ext4_journal_start_sb+0x154/0x310 fs/ext4/ext4_jbd2.c:105 __ext4_new_inode+0xc57/0x3020 fs/ext4/ialloc.c:1076 ext4_mkdir+0x28a/0x750 fs/ext4/namei.c:2793 vfs_mkdir+0x288/0x350 fs/namei.c:3652 do_mkdirat+0x132/0x220 fs/namei.c:3675 __do_sys_mkdir fs/namei.c:3691 [inline] __se_sys_mkdir fs/namei.c:3689 [inline] __x64_sys_mkdir+0x32/0x40 fs/namei.c:3689 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: 1 PID: 4032 Comm: syz-executor.2 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================