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authorAl Viro <viro@zeniv.linux.org.uk>2018-04-08 11:57:10 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-04-19 08:55:12 +0200
commit4eb2f39266ac7da022df134433f878747e3ec813 (patch)
tree3f2607596dc50754d42e8814ad74ac8e67caa1b9
parent84f086ee4e6af45256e10a03afdd19039e7981f4 (diff)
getname_kernel() needs to make sure that ->name != ->iname in long case
commit 30ce4d1903e1d8a7ccd110860a5eef3c638ed8be upstream. missed it in "kill struct filename.separate" several years ago. Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/namei.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/namei.c b/fs/namei.c
index ee19c4ef24b2..747fcb6f10c5 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -222,9 +222,10 @@ getname_kernel(const char * filename)
if (len <= EMBEDDED_NAME_MAX) {
result->name = (char *)result->iname;
} else if (len <= PATH_MAX) {
+ const size_t size = offsetof(struct filename, iname[1]);
struct filename *tmp;
- tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
+ tmp = kmalloc(size, GFP_KERNEL);
if (unlikely(!tmp)) {
__putname(result);
return ERR_PTR(-ENOMEM);