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selinux/stable-6.9 PR 20240402

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Merge tag 'selinux-pr-20240402' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux

Pull selinux fix from Paul Moore:
 "A single patch for SELinux to fix a problem where we could potentially
  dereference an error pointer if we failed to successfully mount
  selinuxfs"

* tag 'selinux-pr-20240402' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  selinux: avoid dereference of garbage after mount failure
This commit is contained in:
Linus Torvalds 2024-04-02 20:13:09 -07:00
commit 3e92c1e6cd
1 changed files with 7 additions and 5 deletions
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12
security/selinux/selinuxfs.c
View File

@ -2123,7 +2123,6 @@ static struct file_system_type sel_fs_type = {
.kill_sb = sel_kill_sb,
};
static struct vfsmount *selinuxfs_mount __ro_after_init;
struct path selinux_null __ro_after_init;
static int __init init_sel_fs(void)
@ -2145,18 +2144,21 @@ static int __init init_sel_fs(void)
return err;
}
selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type);
if (IS_ERR(selinuxfs_mount)) {
selinux_null.mnt = kern_mount(&sel_fs_type);
if (IS_ERR(selinux_null.mnt)) {
pr_err("selinuxfs: could not mount!\n");
err = PTR_ERR(selinuxfs_mount);
selinuxfs_mount = NULL;
err = PTR_ERR(selinux_null.mnt);
selinux_null.mnt = NULL;
return err;
}
selinux_null.dentry = d_hash_and_lookup(selinux_null.mnt->mnt_root,
&null_name);
if (IS_ERR(selinux_null.dentry)) {
pr_err("selinuxfs: could not lookup null!\n");
err = PTR_ERR(selinux_null.dentry);
selinux_null.dentry = NULL;
return err;
}
return err;