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| author | Julien Cristau <jcristau@debian.org> | 2014-11-10 12:13:41 -0500 |
|---|---|---|
| committer | Mike Gabriel <mike.gabriel@das-netzwerkteam.de> | 2015-02-14 16:14:32 +0100 |
| commit | 78b38a8a37e6105360c82a710ef62c92643ea4c1 (patch) | |
| tree | cd34e2d29062e55f64abca90b076a8a9146ba0ad /nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c | |
| parent | 1a9f23118787be611b6db51e4eac864c43c702d9 (diff) | |
| download | nx-libs-78b38a8a37e6105360c82a710ef62c92643ea4c1.tar.gz nx-libs-78b38a8a37e6105360c82a710ef62c92643ea4c1.tar.bz2 nx-libs-78b38a8a37e6105360c82a710ef62c92643ea4c1.zip | |
glx: Length checking for GLXRender requests (v2) [CVE-2014-8098 2/8] (v3)
v2:
Remove can't-happen comparison for cmdlen < 0 (Michal Srb)
v3: backport to RHEL5 hit old paths
v4: backport to nx-libs 3.6.x (Mike DePaulo)
Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c')
| -rw-r--r-- | nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c b/nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c index 027cba709..7174fdaec 100644 --- a/nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c +++ b/nx-X11/programs/Xserver/GL/glx/glxcmdsswap.c @@ -498,7 +498,7 @@ int __glXSwapRender(__GLXclientState *cl, GLbyte *pc) left = (req->length << 2) - sz_xGLXRenderReq; while (left > 0) { __GLXrenderSizeData *entry; - int extra; + int extra = 0; void (* proc)(GLbyte *); /* @@ -511,6 +511,9 @@ int __glXSwapRender(__GLXclientState *cl, GLbyte *pc) cmdlen = hdr->length; opcode = hdr->opcode; + if (left < cmdlen) + return BadLength; + if ( (opcode >= __GLX_MIN_RENDER_OPCODE) && (opcode <= __GLX_MAX_RENDER_OPCODE) ) { entry = &__glXRenderSizeTable[opcode]; @@ -531,22 +534,19 @@ int __glXSwapRender(__GLXclientState *cl, GLbyte *pc) client->errorValue = commandsDone; return __glXBadRenderRequest; } + + if (cmdlen < entry->bytes) { + return BadLength; + } + if (entry->varsize) { /* variable size command */ extra = (*entry->varsize)(pc + __GLX_RENDER_HDR_SIZE, True); if (extra < 0) { return BadLength; } - if (cmdlen != __GLX_PAD(entry->bytes + extra)) { - return BadLength; - } - } else { - /* constant size command */ - if (cmdlen != __GLX_PAD(entry->bytes)) { - return BadLength; - } } - if (left < cmdlen) { + if (cmdlen != safe_pad(safe_add(entry->bytes, extra))) { return BadLength; } |