================================================================== BUG: KCSAN: data-race in __ext4_update_other_inode_time / ext4_unlink write to 0xffff88802cc14868 of 8 bytes by task 9123 on cpu 0: ext4_unlink+0x7a6/0x9f0 fs/ext4/namei.c:3240 vfs_unlink+0x22f/0x3d0 fs/namei.c:3825 do_unlinkat+0x28a/0x4d0 fs/namei.c:3889 __do_sys_unlink fs/namei.c:3936 [inline] __se_sys_unlink fs/namei.c:3934 [inline] __x64_sys_unlink+0x2c/0x30 fs/namei.c:3934 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88802cc14868 of 8 bytes by task 7537 on cpu 1: 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_dirty_inode+0xa6/0xc0 fs/ext4/inode.c:5854 __mark_inode_dirty+0x72/0x7e0 fs/fs-writeback.c:2258 mark_inode_dirty include/linux/fs.h:2192 [inline] generic_write_end+0x166/0x220 fs/buffer.c:2203 ext4_da_write_end+0x57e/0x760 fs/ext4/inode.c:3092 generic_perform_write+0x23b/0x390 mm/filemap.c:3329 ext4_buffered_write_iter+0x2cc/0x3b0 fs/ext4/file.c:270 ext4_file_write_iter+0x76f/0x1010 include/linux/fs.h:805 call_write_iter include/linux/fs.h:1908 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0x607/0x690 fs/read_write.c:578 ksys_write+0xce/0x180 fs/read_write.c:631 __do_sys_write fs/read_write.c:643 [inline] __se_sys_write fs/read_write.c:640 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:640 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 7537 Comm: syz-executor.0 Not tainted 5.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================