libselinux/0030-libselinux-make-selinux_status_open-3-reentrant.patch
Petr Lautrbach 041eacc63c libselinux-3.2-5
Rebase on upstream commit 32611aea6543

See
    $ cd SELinuxProject/selinux
    $ git log --pretty=oneline libselinux-3.2..32611aea6543 -- libselinux

Related: rhbz#1938789
2021-07-30 12:03:09 +02:00

40 lines
1.2 KiB
Diff

From c5a699046f4a08a554d2da9121924fc80bf27cba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20G=C3=B6ttsche?= <cgzones@googlemail.com>
Date: Mon, 10 May 2021 12:56:47 +0200
Subject: [PATCH] libselinux: make selinux_status_open(3) reentrant
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Do not mmap the status page again if `selinux_status_open(3)` has already
been called with success.
`selinux_status_open(3)` might be called unintentionally multiple times,
e.g. once to manually be able to call `selinux_status_getenforce(3)` and
once indirectly through `selinux_check_access(3)`
(since libselinux 3.2).
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
---
libselinux/src/sestatus.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libselinux/src/sestatus.c b/libselinux/src/sestatus.c
index 12b015e088ea..531a522c0f48 100644
--- a/libselinux/src/sestatus.c
+++ b/libselinux/src/sestatus.c
@@ -282,6 +282,10 @@ int selinux_status_open(int fallback)
long pagesize;
uint32_t seqno;
+ if (selinux_status != NULL) {
+ return 0;
+ }
+
if (!selinux_mnt) {
errno = ENOENT;
return -1;
--
2.32.0