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authorLinus Torvalds <torvalds@linux-foundation.org>2019-01-02 10:56:09 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-01-02 10:56:09 -0800
commit19f2e267a5d0d26282a64f8f788c482852c95324 (patch)
treedb0923d0693e15f942c05c7d8ffbeda83ad362a4 /security
parent1ac5cd4978794bd060d448acc0305e9fc996ba92 (diff)
parent20bb4cb4fb9fb994d757932abc4404cf0f0f56cc (diff)
Merge branch 'next-smack' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull smack updates from James Morris: "Two Smack patches for 4.21. Jose's patch adds missing documentation and Zoran's fleshes out the access checks on keyrings" * 'next-smack' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: Smack: Improve Documentation smack: fix access permissions for keyring
Diffstat (limited to 'security')
-rw-r--r--security/smack/smack_lsm.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 81fb4c1631e9..cd720c06b78c 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -4333,6 +4333,12 @@ static int smack_key_permission(key_ref_t key_ref,
int request = 0;
int rc;
+ /*
+ * Validate requested permissions
+ */
+ if (perm & ~KEY_NEED_ALL)
+ return -EINVAL;
+
keyp = key_ref_to_ptr(key_ref);
if (keyp == NULL)
return -EINVAL;
@@ -4356,10 +4362,10 @@ static int smack_key_permission(key_ref_t key_ref,
ad.a.u.key_struct.key = keyp->serial;
ad.a.u.key_struct.key_desc = keyp->description;
#endif
- if (perm & KEY_NEED_READ)
- request = MAY_READ;
+ if (perm & (KEY_NEED_READ | KEY_NEED_SEARCH | KEY_NEED_VIEW))
+ request |= MAY_READ;
if (perm & (KEY_NEED_WRITE | KEY_NEED_LINK | KEY_NEED_SETATTR))
- request = MAY_WRITE;
+ request |= MAY_WRITE;
rc = smk_access(tkp, keyp->security, request, &ad);
rc = smk_bu_note("key access", tkp, keyp->security, request, rc);
return rc;