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| author | Zhenlei Huang <zlei.huang@gmail.com> | 2022-09-30 07:55:29 +0000 |
|---|---|---|
| committer | Kristof Provost <kp@FreeBSD.org> | 2022-11-04 12:21:45 +0000 |
| commit | a9c3d5de9ac8ae8090881f20c894d3577d97e92a (patch) | |
| tree | 42500767a29e240afd0e8dee37813820944943a4 | |
| parent | 3cef626d8e1bd844fd0822aa11989c20e37949a0 (diff) | |
| download | src-a9c3d5de9ac8ae8090881f20c894d3577d97e92a.tar.gz src-a9c3d5de9ac8ae8090881f20c894d3577d97e92a.zip | |
if_vxlan(4): Check the size of data available in mbuf before using them
PR: 261711
Reviewed by: kp
Tested by: Alfa (burak.sn at outlook.com)
Approved by: re (gjb), kp (mentor)
Differential Revision: https://reviews.freebsd.org/D36794
(cherry picked from commit 8707cb19e68128c181477d87f960182c14e15f12)
(cherry picked from commit 639aebb2aa0b72c569f8779e13351d37f7bb17c6)
| -rw-r--r-- | sys/net/if_vxlan.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/net/if_vxlan.c b/sys/net/if_vxlan.c index 17f96727ca12..67aa760f7fcf 100644 --- a/sys/net/if_vxlan.c +++ b/sys/net/if_vxlan.c @@ -2560,6 +2560,12 @@ vxlan_input(struct vxlan_socket *vso, uint32_t vni, struct mbuf **m0, ifp = sc->vxl_ifp; m = *m0; + if (m->m_len < ETHER_HDR_LEN && + (m = m_pullup(m, ETHER_HDR_LEN)) == NULL) { + *m0 = NULL; + error = ENOBUFS; + goto out; + } eh = mtod(m, struct ether_header *); if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { |