From 0d3cca2c6f545cf9a91c75aed451df6d16ae5511 Mon Sep 17 00:00:00 2001 From: Ben Chan Date: Thu, 3 Aug 2017 14:25:33 -0700 Subject: broadband-modem-qmi: fix potential use-after-freed issues This patch fixes some potential use-after-freed issues in dms_get_ids_ready(). When an invalid ESN / MEID is retrieved, `ctx->self->priv->esn' / `ctx->self->priv->meid' is freed but not reset to NULL. If no IMEI is retrieved, `str' can be set to the already freed `ctx->self->priv->esn' / `ctx->self->priv->meid' and then propagated to a GSimpleAsyncResult object. --- src/mm-broadband-modem-qmi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src') diff --git a/src/mm-broadband-modem-qmi.c b/src/mm-broadband-modem-qmi.c index 38356426..3a04e993 100644 --- a/src/mm-broadband-modem-qmi.c +++ b/src/mm-broadband-modem-qmi.c @@ -1231,7 +1231,7 @@ dms_get_ids_ready (QmiClientDms *client, if (qmi_message_dms_get_ids_output_get_esn (output, &str, NULL) && str[0] != '\0') { - g_free (ctx->self->priv->esn); + g_clear_pointer (&ctx->self->priv->esn, g_free); len = strlen (str); if (len == 7) ctx->self->priv->esn = g_strdup_printf ("0%s", str); /* zero-pad to 8 chars */ @@ -1243,7 +1243,7 @@ dms_get_ids_ready (QmiClientDms *client, if (qmi_message_dms_get_ids_output_get_meid (output, &str, NULL) && str[0] != '\0') { - g_free (ctx->self->priv->meid); + g_clear_pointer (&ctx->self->priv->meid, g_free); len = strlen (str); if (len == 14) ctx->self->priv->meid = g_strdup (str); -- cgit v1.2.3-70-g09d2