This is a note to let you know that I've just added the patch titled
userns: Check uid_map's opener's fsuid, not the current fsuid
to the 3.8-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:
userns-check-uid_map-s-opener-s-fsuid-not-the-current-fsuid.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e3211c120a85b792978bcb4be7b2886df18d27f0 Mon Sep 17 00:00:00 2001
From: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Date: Sun, 14 Apr 2013 16:28:19 -0700
Subject: userns: Check uid_map's opener's fsuid, not the current fsuid
From: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
commit e3211c120a85b792978bcb4be7b2886df18d27f0 upstream.
Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/user_namespace.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -763,12 +763,12 @@ static bool new_idmap_permitted(const st
u32 id = new_map->extent[0].lower_first;
if (cap_setid == CAP_SETUID) {
kuid_t uid = make_kuid(ns->parent, id);
- if (uid_eq(uid, current_fsuid()))
+ if (uid_eq(uid, file->f_cred->fsuid))
return true;
}
else if (cap_setid == CAP_SETGID) {
kgid_t gid = make_kgid(ns->parent, id);
- if (gid_eq(gid, current_fsgid()))
+ if (gid_eq(gid, file->f_cred->fsgid))
return true;
}
}
Patches currently in stable-queue which might be from luto@xxxxxxxxxxxxxx are
queue-3.8/userns-check-uid_map-s-opener-s-fsuid-not-the-current-fsuid.patch
queue-3.8/userns-don-t-let-unprivileged-users-trick-privileged-users-into-setting-the-id_map.patch
queue-3.8/userns-changing-any-namespace-id-mappings-should-require-privileges.patch
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