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From 55b09ba184c1803a5e1454c44e9e9a5c578dd741 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
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Date: Mon, 25 Jul 2022 17:10:17 +0200
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Subject: [PATCH] Reset errno before strtol
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This sets errno to 0 before strotol calls after which the errno
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is being checked.
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Per man 3 strtol:
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Since strtol() can legitimately return 0, LONG_MAX, or
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LONG_MIN (LLONG_MAX or LLONG_MIN for strtoll()) on both success and
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failure, the calling program should set errno to 0 before the call, and
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then determine if an error occurred by checking whether errno has a
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nonzero value after the call.
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This is inspired by https://github.com/OpenSCAP/openscap/pull/1861.
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---
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src/OVAL/probes/independent/sql57_probe.c | 1 +
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src/OVAL/probes/independent/sql_probe.c | 1 +
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src/OVAL/probes/oval_fts.c | 1 +
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src/OVAL/probes/unix/xinetd_probe.c | 1 +
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4 files changed, 4 insertions(+)
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diff --git a/src/OVAL/probes/independent/sql57_probe.c b/src/OVAL/probes/independent/sql57_probe.c
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index ce1466635c..2b35750ee2 100644
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--- a/src/OVAL/probes/independent/sql57_probe.c
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+++ b/src/OVAL/probes/independent/sql57_probe.c
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@@ -216,6 +216,7 @@ static int dbURIInfo_parse(dbURIInfo_t *info, const char *conn)
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matchitem1(tok, 'c',
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"onnecttimeout", tmp);
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if (tmp != NULL) {
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+ errno = 0;
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info->conn_timeout = strtol(tmp, NULL, 10);
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if (errno == ERANGE || errno == EINVAL)
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diff --git a/src/OVAL/probes/independent/sql_probe.c b/src/OVAL/probes/independent/sql_probe.c
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index 2ede89d031..71ba3c08c3 100644
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--- a/src/OVAL/probes/independent/sql_probe.c
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+++ b/src/OVAL/probes/independent/sql_probe.c
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@@ -216,6 +216,7 @@ static int dbURIInfo_parse(dbURIInfo_t *info, const char *conn)
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matchitem1(tok, 'c',
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"onnecttimeout", tmp);
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if (tmp != NULL) {
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+ errno = 0;
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info->conn_timeout = strtol(tmp, NULL, 10);
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if (errno == ERANGE || errno == EINVAL)
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diff --git a/src/OVAL/probes/oval_fts.c b/src/OVAL/probes/oval_fts.c
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index 1364159c90..f9d0a0c1fd 100644
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--- a/src/OVAL/probes/oval_fts.c
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+++ b/src/OVAL/probes/oval_fts.c
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@@ -729,6 +729,7 @@ OVAL_FTS *oval_fts_open_prefixed(const char *prefix, SEXP_t *path, SEXP_t *filen
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/* max_depth */
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PROBE_ENT_AREF(behaviors, r0, "max_depth", return NULL;);
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SEXP_string_cstr_r(r0, cstr_buff, sizeof cstr_buff - 1);
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+ errno = 0;
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max_depth = strtol(cstr_buff, NULL, 10);
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if (errno == EINVAL || errno == ERANGE) {
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dE("Invalid value of the `%s' attribute: %s", "recurse_direction", cstr_buff);
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diff --git a/src/OVAL/probes/unix/xinetd_probe.c b/src/OVAL/probes/unix/xinetd_probe.c
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index b3375500db..703a07f513 100644
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--- a/src/OVAL/probes/unix/xinetd_probe.c
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+++ b/src/OVAL/probes/unix/xinetd_probe.c
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@@ -1280,6 +1280,7 @@ int op_assign_bool(void *var, char *val)
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*((bool *)(var)) = false;
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} else {
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char *endptr = NULL;
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+ errno = 0;
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*((bool *)(var)) = (bool) strtol (val, &endptr, 2);
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if (errno == EINVAL || errno == ERANGE) {
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return -1;
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