================================================================== BUG: KCSAN: data-race in __ext4_update_other_inode_time / writeback_sb_inodes write to 0xffff88810e74fcd8 of 8 bytes by task 329 on cpu 0: writeback_sb_inodes+0x4a1/0xff0 fs/fs-writeback.c:1712 wb_writeback+0x27d/0x660 fs/fs-writeback.c:1896 wb_do_writeback+0x101/0x5d0 fs/fs-writeback.c:2041 wb_workfn+0xc8/0x430 fs/fs-writeback.c:2082 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275 worker_thread+0x616/0xa70 kernel/workqueue.c:2421 kthread+0x20b/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 read to 0xffff88810e74fcd8 of 8 bytes by task 8431 on cpu 1: __ext4_update_other_inode_time+0x45/0x550 fs/ext4/inode.c:4964 ext4_update_other_inodes_time fs/ext4/inode.c:5011 [inline] ext4_do_update_inode fs/ext4/inode.c:5140 [inline] ext4_mark_iloc_dirty+0x11b6/0x16f0 fs/ext4/inode.c:5725 __ext4_mark_inode_dirty+0x4d6/0x5e0 fs/ext4/inode.c:5919 __ext4_unlink+0x683/0x6c0 fs/ext4/namei.c:3226 ext4_unlink+0x1f1/0x3f0 fs/ext4/namei.c:3274 vfs_unlink+0x232/0x3c0 fs/namei.c:3835 do_unlinkat+0x28a/0x4d0 fs/namei.c:3899 __do_sys_unlink fs/namei.c:3945 [inline] __se_sys_unlink fs/namei.c:3943 [inline] __x64_sys_unlink+0x2c/0x30 fs/namei.c:3943 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: 8431 Comm: syz-executor.0 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================