File 0220-libslirp-bootp-check-bootp_input-bu.patch of Package qemu-testsuite.20428
From: Jose R Ziviani <jose.ziviani@suse.com>
Date: Tue, 6 Jul 2021 17:13:28 -0600
Subject: libslirp: bootp: check bootp_input buffer size
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: 2eca0838eee1da96204545e22cdaed860d9d7c6c
References: bsc#1187364, CVE-2021-3592
Fixes: CVE-2021-3592
Fixes: https://gitlab.freedesktop.org/slirp/libslirp/-/issues/44
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Jose R Ziviani <jose.ziviani@suse.com>
---
slirp/bootp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/slirp/bootp.c b/slirp/bootp.c
index 27f9e702f5b40fd611f7396a7d85..a9471b2793b926c97941fb915942 100644
--- a/slirp/bootp.c
+++ b/slirp/bootp.c
@@ -370,9 +370,9 @@ static void bootp_reply(Slirp *slirp,
void bootp_input(struct mbuf *m)
{
- struct bootp_t *bp = mtod(m, struct bootp_t *);
+ struct bootp_t *bp = mtod_check(m, sizeof(struct bootp_t));
- if (bp->bp_op == BOOTP_REQUEST) {
+ if (bp && bp->bp_op == BOOTP_REQUEST) {
bootp_reply(m->slirp, bp, m_end(m));
}
}