================================================================== BUG: KCSAN: data-race in __ext4_update_other_inode_time / ext4_unlink write to 0xffff888091b0d768 of 8 bytes by task 8889 on cpu 1: ext4_unlink+0x7a6/0x9f0 fs/ext4/namei.c:3240 vfs_unlink+0x232/0x3c0 fs/namei.c:3824 do_unlinkat+0x28a/0x4d0 fs/namei.c:3888 __do_sys_unlink fs/namei.c:3934 [inline] __se_sys_unlink fs/namei.c:3932 [inline] __x64_sys_unlink+0x2c/0x30 fs/namei.c:3932 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888091b0d768 of 8 bytes by task 8735 on cpu 0: ext4_encode_extra_time fs/ext4/ext4.h:866 [inline] __ext4_update_other_inode_time+0x14f/0x570 fs/ext4/inode.c:4908 ext4_update_other_inodes_time fs/ext4/inode.c:4940 [inline] ext4_do_update_inode fs/ext4/inode.c:5068 [inline] ext4_mark_iloc_dirty+0x1296/0x1660 fs/ext4/inode.c:5624 __ext4_mark_inode_dirty+0x448/0x630 fs/ext4/inode.c:5818 ext4_mkdir+0x7fb/0xc90 fs/ext4/namei.c:2805 vfs_mkdir+0x288/0x350 fs/namei.c:3641 do_mkdirat+0x132/0x220 fs/namei.c:3664 __do_sys_mkdir fs/namei.c:3680 [inline] __se_sys_mkdir fs/namei.c:3678 [inline] __x64_sys_mkdir+0x32/0x40 fs/namei.c:3678 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: 0 PID: 8735 Comm: syz-executor.0 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================