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| author | Yan, Zheng <zyan@redhat.com> | 2014-11-19 15:50:34 +0800 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-11-19 13:07:20 -0500 |
| commit | 4a7795d35e252f38298980530e01e21867f8f856 (patch) | |
| tree | 1ed969cdba05031ff6410a14f32225744b351022 /fs | |
| parent | ad0eab9293485d1c06237e9249f6d4dfa3d93d4d (diff) | |
| download | linux-exynos-4a7795d35e252f38298980530e01e21867f8f856.tar.gz linux-exynos-4a7795d35e252f38298980530e01e21867f8f856.tar.bz2 linux-exynos-4a7795d35e252f38298980530e01e21867f8f856.zip | |
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 <zyan@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/dcache.c | 1 |
1 files changed, 1 insertions, 0 deletions
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) |