83 lines
2.6 KiB
Diff
83 lines
2.6 KiB
Diff
From b8d6754afe8a80219add46554c40cc3c8a8368d0 Mon Sep 17 00:00:00 2001
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From: Bastien Nocera <hadess@hadess.net>
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Date: Fri, 10 May 2024 13:47:29 +0200
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Subject: [PATCH] main: Simplify parse_config_string()
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The memory management done by parse_config_string() was quite
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complicated, as it expected to be able to free the value in the return
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variable if it was already allocated.
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That particular behaviour was only used for a single variable which was
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set to its default value during startup and might be overwritten after
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this function call.
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Use an intermediate variable to check whether we need to free
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btd_opts.name and simplify parse_config_string().
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Error: RESOURCE_LEAK (CWE-772): [#def39] [important]
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bluez-5.75/src/main.c:425:2: alloc_fn: Storage is returned from allocation function "g_key_file_get_string".
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bluez-5.75/src/main.c:425:2: var_assign: Assigning: "tmp" = storage returned from "g_key_file_get_string(config, group, key, &err)".
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bluez-5.75/src/main.c:433:2: noescape: Assuming resource "tmp" is not freed or pointed-to as ellipsis argument to "btd_debug".
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bluez-5.75/src/main.c:440:2: leaked_storage: Variable "tmp" going out of scope leaks the storage it points to.
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438| }
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439|
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440|-> return true;
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441| }
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442|
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---
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src/main.c | 23 ++++++++++++++---------
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1 file changed, 14 insertions(+), 9 deletions(-)
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diff --git a/src/main.c b/src/main.c
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index 1c7390e6329d..217de1a3c935 100644
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--- a/src/main.c
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+++ b/src/main.c
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@@ -431,9 +431,14 @@ static bool parse_config_string(GKeyFile *config, const char *group,
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const char *key, char **val)
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{
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GError *err = NULL;
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- char *tmp;
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- tmp = g_key_file_get_string(config, group, key, &err);
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+ if (val == NULL) {
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+ warn("%s passed a NULL value to parse [%s] %s",
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+ __func__, group, key);
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+ return false;
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+ }
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+
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+ *val = g_key_file_get_string(config, group, key, &err);
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if (err) {
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if (err->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND)
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DBG("%s", err->message);
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@@ -441,12 +446,7 @@ static bool parse_config_string(GKeyFile *config, const char *group,
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return false;
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}
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- DBG("%s.%s = %s", group, key, tmp);
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-
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- if (val) {
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- g_free(*val);
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- *val = tmp;
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- }
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+ DBG("%s.%s = %s", group, key, *val);
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return true;
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}
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@@ -1023,7 +1023,12 @@ static void parse_secure_conns(GKeyFile *config)
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static void parse_general(GKeyFile *config)
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{
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- parse_config_string(config, "General", "Name", &btd_opts.name);
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+ char *str = NULL;
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+
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+ if (parse_config_string(config, "General", "Name", &str)) {
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+ g_free(btd_opts.name);
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+ btd_opts.name = str;
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+ }
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parse_config_hex(config, "General", "Class", &btd_opts.class);
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parse_config_u32(config, "General", "DiscoverableTimeout",
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&btd_opts.discovto,
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--
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2.52.0
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