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authorAl Viro <viro@zeniv.linux.org.uk>2020-12-10 00:38:24 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2020-12-22 03:42:29 +0100
commit2e2cbaf920d14de9a96180ddefd6861bcc46f07d (patch)
tree57d2cf2250889401bdd946a392b361fdb9290aba
parentMake sure that make_create_in_sticky() never sees uninitialized value of dir_... (diff)
downloadlinux-2e2cbaf920d14de9a96180ddefd6861bcc46f07d.tar.xz
linux-2e2cbaf920d14de9a96180ddefd6861bcc46f07d.zip
fix hostfs_open() use of ->f_path.dentry
this is one of the cases where we need to use d_real() - we are using more than the name of dentry here. ->d_sb is used as well, so in case of hostfs being used as a layer we get the wrong superblock. Reported-by: Johannes Berg <johannes@sipsolutions.net> Tested-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/hostfs/hostfs_kern.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index c070c0d8e3e9..aea35459d390 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -315,7 +315,7 @@ retry:
if (mode & FMODE_WRITE)
r = w = 1;
- name = dentry_name(file->f_path.dentry);
+ name = dentry_name(d_real(file->f_path.dentry, file->f_inode));
if (name == NULL)
return -ENOMEM;