================================================================== BUG: KCSAN: data-race in __mark_inode_dirty / other_inode_match write to 0xffff8881252b2878 of 8 bytes by task 14960 on cpu 0: other_inode_match fs/ext4/inode.c:4858 [inline] other_inode_match+0x13f/0x570 fs/ext4/inode.c:4842 find_inode_nowait+0x12f/0x160 fs/inode.c:1445 ext4_update_other_inodes_time fs/ext4/inode.c:4897 [inline] ext4_do_update_inode fs/ext4/inode.c:5023 [inline] ext4_mark_iloc_dirty+0x123c/0x1500 fs/ext4/inode.c:5578 ext4_mark_inode_dirty+0xe6/0x420 fs/ext4/inode.c:5771 ext4_dirty_inode+0xad/0xd0 fs/ext4/inode.c:5802 __mark_inode_dirty+0x5b7/0x940 fs/fs-writeback.c:2258 mark_inode_dirty include/linux/fs.h:2183 [inline] generic_write_end+0x1ba/0x1f0 fs/buffer.c:2199 ext4_da_write_end+0x162/0x670 fs/ext4/inode.c:3092 generic_perform_write+0x1d7/0x320 mm/filemap.c:3298 ext4_buffered_write_iter+0x14e/0x280 fs/ext4/file.c:270 ext4_file_write_iter+0xf4/0xd30 fs/ext4/file.c:642 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write+0x303/0x400 fs/read_write.c:483 __vfs_write+0x9e/0xb0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x189/0x380 fs/read_write.c:542 ksys_write+0xc5/0x1a0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x49/0x60 fs/read_write.c:620 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881252b2878 of 8 bytes by task 7745 on cpu 1: __mark_inode_dirty+0x4c8/0x940 fs/fs-writeback.c:2329 generic_update_time+0x184/0x270 fs/inode.c:1681 update_time+0x7d/0x90 fs/inode.c:1694 touch_atime+0x13f/0x150 fs/inode.c:1765 file_accessed include/linux/fs.h:2220 [inline] iterate_dir+0x21a/0x370 fs/readdir.c:70 __do_sys_getdents fs/readdir.c:285 [inline] __se_sys_getdents fs/readdir.c:267 [inline] __x64_sys_getdents+0x14b/0x2b0 fs/readdir.c:267 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 7745 Comm: syz-executor.2 Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================