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| author | James Morris <james.morris@microsoft.com> | 2018-12-13 19:30:33 -0800 |
|---|---|---|
| committer | James Morris <james.morris@microsoft.com> | 2018-12-13 19:30:33 -0800 |
| commit | 20bb4cb4fb9fb994d757932abc4404cf0f0f56cc (patch) | |
| tree | 77d80d5d3541d01bf198ebe581e86083d0c77f1d /security | |
| parent | 1072bd678547f8663cfb81a22fdb50c589e4976e (diff) | |
| parent | 55b078f031f556ea18963bd808e79a1dfaa4be44 (diff) | |
| download | linux-0-day-20bb4cb4fb9fb994d757932abc4404cf0f0f56cc.tar.gz linux-0-day-20bb4cb4fb9fb994d757932abc4404cf0f0f56cc.tar.xz | |
Merge branch 'smack-for-4.21-a' of https://github.com/cschaufler/next-smack into next-smack
From Casey.
"I have two Smack patches for 4.21. One Jose's patch adds
missing documentation and Zoran's fleshes out the access checks
on keyrings."
Diffstat (limited to 'security')
| -rw-r--r-- | security/smack/smack_lsm.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 81fb4c1631e96..cd720c06b78ca 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; |