From 1f939c6bd1512d0b39b470396740added3cb403f Mon Sep 17 00:00:00 2001 From: John Johansen Date: Tue, 20 Sep 2022 04:01:28 -0700 Subject: apparmor: Fix regression in stacking due to label flags The unconfined label flag is not being computed correctly. It should only be set if all the profiles in the vector are set, which is different than what is required for the debug and stale flag that are set if any on the profile flags are set. Fixes: c1ed5da19765 ("apparmor: allow label to carry debug flags") Signed-off-by: John Johansen --- security/apparmor/label.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'security/apparmor/label.c') diff --git a/security/apparmor/label.c b/security/apparmor/label.c index 98dadd960977..aa4031628af5 100644 --- a/security/apparmor/label.c +++ b/security/apparmor/label.c @@ -197,15 +197,18 @@ static bool vec_is_stale(struct aa_profile **vec, int n) return false; } -static long union_vec_flags(struct aa_profile **vec, int n, long mask) +static long accum_vec_flags(struct aa_profile **vec, int n) { - long u = 0; + long u = FLAG_UNCONFINED; int i; AA_BUG(!vec); for (i = 0; i < n; i++) { - u |= vec[i]->label.flags & mask; + u |= vec[i]->label.flags & (FLAG_DEBUG1 | FLAG_DEBUG2 | + FLAG_STALE); + if (!(u & vec[i]->label.flags & FLAG_UNCONFINED)) + u &= ~FLAG_UNCONFINED; } return u; @@ -1097,8 +1100,7 @@ static struct aa_label *label_merge_insert(struct aa_label *new, else if (k == b->size) return aa_get_label(b); } - new->flags |= union_vec_flags(new->vec, new->size, FLAG_UNCONFINED | - FLAG_DEBUG1 | FLAG_DEBUG2); + new->flags |= accum_vec_flags(new->vec, new->size); ls = labels_set(new); write_lock_irqsave(&ls->lock, flags); label = __label_insert(labels_set(new), new, false); -- cgit v1.2.3