From 4a7795d35e252f38298980530e01e21867f8f856 Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" Date: Wed, 19 Nov 2014 15:50:34 +0800 Subject: [PATCH] vfs: fix reference leak in d_prune_aliases() In "d_prune_alias(): just lock the parent and call __dentry_kill()" the old dget + d_drop + dput has been replaced with lock_parent + __dentry_kill; unfortunately, dput() does more than just killing dentry - it also drops the reference to parent. New variant leaks that reference and needs dput(parent) after killing the child off. Signed-off-by: Yan, Zheng Signed-off-by: Al Viro --- fs/dcache.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/dcache.c b/fs/dcache.c index 3ffef7f4e5cd..5bc72b07fde2 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -778,6 +778,7 @@ restart: struct dentry *parent = lock_parent(dentry); if (likely(!dentry->d_lockref.count)) { __dentry_kill(dentry); + dput(parent); goto restart; } if (parent) -- 2.20.1