This is a note to let you know that I've just added the patch titled
cred: Reject inodes with invalid ids in set_create_file_as()
to the 4.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cred-reject-inodes-with-invalid-ids-in-set_create_file_as.patch
and it can be found in the queue-4.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5f65e5ca286126a60f62c8421b77c2018a482b8a Mon Sep 17 00:00:00 2001
From: Seth Forshee <seth.forshee@xxxxxxxxxxxxx>
Date: Tue, 26 Apr 2016 14:36:24 -0500
Subject: cred: Reject inodes with invalid ids in set_create_file_as()
From: Seth Forshee <seth.forshee@xxxxxxxxxxxxx>
commit 5f65e5ca286126a60f62c8421b77c2018a482b8a upstream.
Using INVALID_[UG]ID for the LSM file creation context doesn't
make sense, so return an error if the inode passed to
set_create_file_as() has an invalid id.
Signed-off-by: Seth Forshee <seth.forshee@xxxxxxxxxxxxx>
Acked-by: Serge Hallyn <serge.hallyn@xxxxxxxxxxxxx>
Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/cred.c | 2 ++
1 file changed, 2 insertions(+)
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -689,6 +689,8 @@ EXPORT_SYMBOL(set_security_override_from
*/
int set_create_files_as(struct cred *new, struct inode *inode)
{
+ if (!uid_valid(inode->i_uid) || !gid_valid(inode->i_gid))
+ return -EINVAL;
new->fsuid = inode->i_uid;
new->fsgid = inode->i_gid;
return security_kernel_create_files_as(new, inode);
Patches currently in stable-queue which might be from seth.forshee@xxxxxxxxxxxxx are
queue-4.7/cred-reject-inodes-with-invalid-ids-in-set_create_file_as.patch
queue-4.7/fs-check-for-invalid-i_uid-in-may_follow_link.patch
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