81 lines
2.3 KiB
Diff
81 lines
2.3 KiB
Diff
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From 65f1ccbecc30d31e66126e470d404b757eb9898e Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Christian=20G=C3=B6ttsche?= <cgzones@googlemail.com>
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Date: Mon, 3 May 2021 17:11:17 +0200
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Subject: [PATCH] libselinux: matchpathcon: free memory on realloc failure
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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In case `realloc()` fails and returns NULL, free the passed array,
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instead of just setting the size helper variables to 0.
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Also free the string contents in `free_array_elts()` of the array
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`con_array`, instead of just the array of pointers.
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Found by cppcheck.
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src/matchpathcon.c:86:4: error: Common realloc mistake: 'con_array' nulled but not freed upon failure [memleakOnRealloc]
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con_array = (char **)realloc(con_array, sizeof(char*) *
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^
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Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
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---
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libselinux/src/matchpathcon.c | 26 ++++++++++++++++----------
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1 file changed, 16 insertions(+), 10 deletions(-)
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diff --git a/libselinux/src/matchpathcon.c b/libselinux/src/matchpathcon.c
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index 9e1fab593266..075a3fb3ffcb 100644
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--- a/libselinux/src/matchpathcon.c
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+++ b/libselinux/src/matchpathcon.c
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@@ -78,17 +78,30 @@ static pthread_once_t once = PTHREAD_ONCE_INIT;
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static pthread_key_t destructor_key;
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static int destructor_key_initialized = 0;
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+static void free_array_elts(void)
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+{
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+ int i;
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+ for (i = 0; i < con_array_used; i++)
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+ free(con_array[i]);
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+ free(con_array);
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+
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+ con_array_size = con_array_used = 0;
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+ con_array = NULL;
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+}
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+
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static int add_array_elt(char *con)
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{
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+ char **tmp;
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if (con_array_size) {
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while (con_array_used >= con_array_size) {
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con_array_size *= 2;
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- con_array = (char **)realloc(con_array, sizeof(char*) *
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+ tmp = (char **)realloc(con_array, sizeof(char*) *
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con_array_size);
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- if (!con_array) {
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- con_array_size = con_array_used = 0;
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+ if (!tmp) {
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+ free_array_elts();
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return -1;
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}
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+ con_array = tmp;
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}
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} else {
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con_array_size = 1000;
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@@ -105,13 +118,6 @@ static int add_array_elt(char *con)
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return con_array_used++;
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}
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-static void free_array_elts(void)
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-{
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- con_array_size = con_array_used = 0;
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- free(con_array);
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- con_array = NULL;
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-}
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-
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void set_matchpathcon_invalidcon(int (*f) (const char *p, unsigned l, char *c))
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{
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myinvalidcon = f;
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--
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2.32.0
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