diff options
Diffstat (limited to 'userns-Don-t-allow-unprivileged-creation-of-gid-mapp.patch')
| -rw-r--r-- | userns-Don-t-allow-unprivileged-creation-of-gid-mapp.patch | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/userns-Don-t-allow-unprivileged-creation-of-gid-mapp.patch b/userns-Don-t-allow-unprivileged-creation-of-gid-mapp.patch deleted file mode 100644 index b1d53828a..000000000 --- a/userns-Don-t-allow-unprivileged-creation-of-gid-mapp.patch +++ /dev/null @@ -1,46 +0,0 @@ -From: "Eric W. Biederman" <ebiederm@xmission.com> -Date: Fri, 5 Dec 2014 18:14:19 -0600 -Subject: [PATCH] userns: Don't allow unprivileged creation of gid mappings - -As any gid mapping will allow and must allow for backwards -compatibility dropping groups don't allow any gid mappings to be -established without CAP_SETGID in the parent user namespace. - -For a small class of applications this change breaks userspace -and removes useful functionality. This small class of applications -includes tools/testing/selftests/mount/unprivilged-remount-test.c - -Most of the removed functionality will be added back with the addition -of a one way knob to disable setgroups. Once setgroups is disabled -setting the gid_map becomes as safe as setting the uid_map. - -For more common applications that set the uid_map and the gid_map -with privilege this change will have no affect. - -This is part of a fix for CVE-2014-8989. - -Cc: stable@vger.kernel.org -Reviewed-by: Andy Lutomirski <luto@amacapital.net> -Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> ---- - kernel/user_namespace.c | 4 ---- - 1 file changed, 4 deletions(-) - -diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c -index 27c8dab48c07..1ce6d67c07b7 100644 ---- a/kernel/user_namespace.c -+++ b/kernel/user_namespace.c -@@ -821,10 +821,6 @@ static bool new_idmap_permitted(const struct file *file, - kuid_t uid = make_kuid(ns->parent, id); - 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, file->f_cred->fsgid)) -- return true; - } - } - --- -2.1.0 - |