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Subject[PATCH v3 18/25] commoncap: cap_task_fix_setuid(): handle fsid mappings
Date
Switch cap_task_fix_setuid() to lookup fsids in the fsid mappings. If no fsid
mappings are setup the behavior is unchanged, i.e. fsids are looked up in the
id mappings.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---
/* v2 */
unchanged

/* v3 */
unchanged
---
security/commoncap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/commoncap.c b/security/commoncap.c
index 55e6cc24f887..0581c6aa8bdc 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -1062,7 +1062,7 @@ int cap_task_fix_setuid(struct cred *new, const struct cred *old, int flags)
* if not, we might be a bit too harsh here.
*/
if (!issecure(SECURE_NO_SETUID_FIXUP)) {
- kuid_t root_uid = make_kuid(old->user_ns, 0);
+ kuid_t root_uid = make_kfsuid(old->user_ns, 0);
if (uid_eq(old->fsuid, root_uid) && !uid_eq(new->fsuid, root_uid))
new->cap_effective =
cap_drop_fs_set(new->cap_effective);
--
2.25.0
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