diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2011-11-14 15:56:38 -0800 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-05-03 03:27:21 -0700 |
| commit | ae2975bc3476243b45a1e2344236d7920c268f38 (patch) | |
| tree | e4b2a8472f6047734b6e7e2bdc994375b2790323 /arch/s390/kernel | |
| parent | 22d917d80e842829d0ca0a561967d728eb1d6303 (diff) | |
userns: Convert group_info values from gid_t to kgid_t.
As a first step to converting struct cred to be all kuid_t and kgid_t
values convert the group values stored in group_info to always be
kgid_t values. Unless user namespaces are used this change should
have no effect.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/compat_linux.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c index ab64bdbab2ae..f0273ed760ef 100644 --- a/arch/s390/kernel/compat_linux.c +++ b/arch/s390/kernel/compat_linux.c @@ -173,11 +173,14 @@ asmlinkage long sys32_setfsgid16(u16 gid) static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info) { + struct user_namespace *user_ns = current_user_ns(); int i; u16 group; + kgid_t kgid; for (i = 0; i < group_info->ngroups; i++) { - group = (u16)GROUP_AT(group_info, i); + kgid = GROUP_AT(group_info, i); + group = (u16)from_kgid_munged(user_ns, kgid); if (put_user(group, grouplist+i)) return -EFAULT; } @@ -187,13 +190,20 @@ static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist) { + struct user_namespace *user_ns = current_user_ns(); int i; u16 group; + kgid_t kgid; for (i = 0; i < group_info->ngroups; i++) { if (get_user(group, grouplist+i)) return -EFAULT; - GROUP_AT(group_info, i) = (gid_t)group; + + kgid = make_kgid(user_ns, (gid_t)group); + if (!gid_valid(kgid)) + return -EINVAL; + + GROUP_AT(group_info, i) = kgid; } return 0; |