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openSUSE:Leap:15.6:Update
qemu-testsuite
0223-libslirp-upd6-check-udp6_input-buff.patch
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File 0223-libslirp-upd6-check-udp6_input-buff.patch of Package qemu-testsuite
From: Jose R Ziviani <jose.ziviani@suse.com> Date: Wed, 7 Jul 2021 11:13:50 -0600 Subject: libslirp: upd6: check udp6_input buffer size MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Git-commit: de71c15de66ba9350bf62c45b05f8fbff166517b References: bsc#1187365, CVE-2021-3593 Fixes: CVE-2021-3593 Fixes: https://gitlab.freedesktop.org/slirp/libslirp/-/issues/45 Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Jose R Ziviani <jose.ziviani@suse.com> --- slirp/udp6.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/slirp/udp6.c b/slirp/udp6.c index 986010f0d3a3b81fc295010c6973..b2a4135db9d0e5baa64743bbf542 100644 --- a/slirp/udp6.c +++ b/slirp/udp6.c @@ -29,7 +29,10 @@ void udp6_input(struct mbuf *m) ip = mtod(m, struct ip6 *); m->m_len -= iphlen; m->m_data += iphlen; - uh = mtod(m, struct udphdr *); + uh = mtod_check(m, sizeof(struct udphdr)); + if (uh == NULL) { + goto bad; + } m->m_len += iphlen; m->m_data -= iphlen;
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