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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1729517361; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=34PkQkzS2fJKjA97jCvEOEfq09+BKhcwhQ4YHpj/pVU=; b=ac2r2mN+8dQo3puxa18fo0ebwj0G3DkTJQ/ctUFERogI2/OtldFNmy0RMnwEKR8Yg179h5 G+7j/0CWXdP/OcwDC78KJwGwUR0Vijf6ky3TzhMsPwhLsP/sK5HXwRmhhdo8zKi/vgu4gH Assqq7MREw86dliAgUoQcYLmQVeTlyg= X-MC-Unique: YJhCWXwrP5mM0P1ztRFuZw-1 From: Dehan Meng To: qemu-devel@nongnu.org Cc: demeng@redhat.com, kkostiuk@redhat.com, michael.roth@amd.com, peter.maydell@linaro.org, berrange@redhat.com Subject: [PATCH v3 1/4] qemu-ga: 'Null' check for mandatory parameters Date: Mon, 21 Oct 2024 21:28:36 +0800 Message-Id: <20241021132839.463255-7-demeng@redhat.com> In-Reply-To: <20241021132839.463255-1-demeng@redhat.com> References: <20241021132839.463255-1-demeng@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" sscanf return values are checked and add 'Null' check for mandatory parameters. Signed-off-by: Dehan Meng --- qga/commands-linux.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/qga/commands-linux.c b/qga/commands-linux.c index 51d5e3d927..f0e9cdd27c 100644 --- a/qga/commands-linux.c +++ b/qga/commands-linux.c @@ -2103,7 +2103,9 @@ static char *hexToIPAddress(const void *hexValue, int= is_ipv6) int i; =20 for (i =3D 0; i < 16; i++) { - sscanf(&hexStr[i * 2], "%02hhx", &in6.s6_addr[i]); + if (sscanf(&hex_str[i * 2], "%02hhx", &in6.s6_addr[i]) !=3D 1)= { + return NULL; + } } inet_ntop(AF_INET6, &in6, addr, INET6_ADDRSTRLEN); =20 @@ -2164,6 +2166,10 @@ GuestNetworkRouteList *qmp_guest_network_get_route(E= rror **errp) networkroute =3D route; networkroute->iface =3D g_strdup(Iface); networkroute->destination =3D hexToIPAddress(Destination, = 1); + if (networkroute->destination =3D=3D NULL) { + g_free(route); + continue; + } networkroute->metric =3D Metric; networkroute->source =3D hexToIPAddress(Source, 1); networkroute->desprefixlen =3D g_strdup_printf( @@ -2195,6 +2201,10 @@ GuestNetworkRouteList *qmp_guest_network_get_route(E= rror **errp) networkroute =3D route; networkroute->iface =3D g_strdup(Iface); networkroute->destination =3D hexToIPAddress(&Destination,= 0); + if (networkroute->destination =3D=3D NULL) { + g_free(route); + continue; + } networkroute->gateway =3D hexToIPAddress(&Gateway, 0); networkroute->mask =3D hexToIPAddress(&Mask, 0); networkroute->metric =3D Metric; --=20 2.40.1