================================================================== BUG: KCSAN: data-race in dentry_lru_isolate / link_path_walk write to 0xffff88810adc6000 of 4 bytes by task 24183 on cpu 1: d_lru_isolate fs/dcache.c:442 [inline] dentry_lru_isolate+0x9f/0x200 fs/dcache.c:1173 __list_lru_walk_one+0xfb/0x300 mm/list_lru.c:222 list_lru_walk_one+0x75/0x90 mm/list_lru.c:266 list_lru_shrink_walk include/linux/list_lru.h:195 [inline] prune_dcache_sb+0x67/0xa0 fs/dcache.c:1227 super_cache_scan+0x23e/0x2e0 fs/super.c:105 do_shrink_slab+0x28b/0x550 mm/vmscan.c:511 shrink_slab+0xea/0x1c0 mm/vmscan.c:672 drop_slab_node mm/vmscan.c:706 [inline] drop_slab+0xe5/0x160 mm/vmscan.c:716 drop_caches_sysctl_handler+0xd0/0x1a0 fs/drop_caches.c:65 proc_sys_call_handler+0x329/0x4e0 fs/proc/proc_sysctl.c:591 proc_sys_write+0x1e/0x30 fs/proc/proc_sysctl.c:617 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x6d4/0x7c0 fs/read_write.c:605 ksys_write+0xce/0x180 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:667 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88810adc6000 of 4 bytes by task 4890 on cpu 0: link_path_walk+0x349/0x730 fs/namei.c:2148 path_lookupat+0x7b/0x550 fs/namei.c:2335 filename_lookup+0xf2/0x380 fs/namei.c:2369 user_path_at_empty+0x3b/0x50 fs/namei.c:2649 user_path_at include/linux/namei.h:59 [inline] vfs_statx+0x90/0x270 fs/stat.c:185 vfs_fstatat fs/stat.c:207 [inline] vfs_lstat include/linux/fs.h:3122 [inline] __do_sys_newlstat fs/stat.c:362 [inline] __se_sys_newlstat+0x46/0x250 fs/stat.c:356 __x64_sys_newlstat+0x2d/0x40 fs/stat.c:356 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: 4890 Comm: systemd-udevd Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================