From: william.c.roberts@intel.com
To: sds@tycho.nsa.gov, nnk@google.com, selinux@tycho.nsa.gov
Subject: [PATCH take2 v5] libsepol: fix checkpolicy dontaudit compiler bug
Date: Tue, 15 Nov 2016 15:30:22 -0800 [thread overview]
Message-ID: <1479252622-20935-1-git-send-email-william.c.roberts@intel.com> (raw)
From: William Roberts <william.c.roberts@intel.com>
The combining logic for dontaudit rules was wrong, causing
a dontaudit A B:C *; rule to be clobbered by a dontaudit A B:C p;
rule.
This is a reimplementation of:
commit 6201bb5e258e2b5bcc04d502d6fbc05c69d21d71 ("libsepol:
fix checkpolicy dontaudit compiler bug")
that avoids the cumbersome pointer assignments on alloced.
Reported-by: Nick Kralevich <nnk@google.com>
Signed-off-by: William Roberts <william.c.roberts@intel.com>
---
libsepol/src/expand.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/libsepol/src/expand.c b/libsepol/src/expand.c
index 004a029..17d2a2a 100644
--- a/libsepol/src/expand.c
+++ b/libsepol/src/expand.c
@@ -1640,6 +1640,12 @@ static avtab_ptr_t find_avtab_node(sepol_handle_t * handle,
if (!node) {
memset(&avdatum, 0, sizeof avdatum);
+ /*
+ * AUDITDENY and DONTAUDIT are &= assigned, versus |= for
+ * others. Initialize the data accordingly.
+ */
+ avdatum.data = (key->specified &
+ (AVRULE_AUDITDENY | AVRULE_DONTAUDIT)) ? ~0 : 0;
/* this is used to get the node - insertion is actually unique */
node = avtab_insert_nonunique(avtab, key, &avdatum);
if (!node) {
@@ -1850,10 +1856,7 @@ static int expand_avrule_helper(sepol_handle_t * handle,
*/
avdatump->data &= cur->data;
} else if (specified & AVRULE_DONTAUDIT) {
- if (avdatump->data)
- avdatump->data &= ~cur->data;
- else
- avdatump->data = ~cur->data;
+ avdatump->data &= ~cur->data;
} else if (specified & AVRULE_XPERMS) {
xperms = avdatump->xperms;
if (!xperms) {
--
2.7.4
next reply other threads:[~2016-11-15 23:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-15 23:30 william.c.roberts [this message]
2016-11-16 0:33 ` [PATCH take2 v5] libsepol: fix checkpolicy dontaudit compiler bug William Roberts
2016-11-16 2:49 ` William Roberts
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1479252622-20935-1-git-send-email-william.c.roberts@intel.com \
--to=william.c.roberts@intel.com \
--cc=nnk@google.com \
--cc=sds@tycho.nsa.gov \
--cc=selinux@tycho.nsa.gov \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.