diff options
| author | Adam Jackson <ajax@redhat.com> | 2014-11-10 12:13:45 -0500 |
|---|---|---|
| committer | Julien Cristau <jcristau@debian.org> | 2014-12-09 17:50:13 +0100 |
| commit | fe9672204ad9edc09c4ae6ba1b9e9de09ec98287 (patch) | |
| tree | 442dbe32d1b6ad55cea3847000ccfc8f0330f08d | |
| parent | 525db4433b042ad5a116ca0366498f5bc36e1640 (diff) | |
glx: Request length checks for SetClientInfoARB [CVE-2014-8098 5/8]
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
(cherry picked from commit afe177020d1fb776c6163f21eddc82cb185b95ca)
Signed-off-by: Julien Cristau <jcristau@debian.org>
| -rw-r--r-- | glx/clientinfo.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/glx/clientinfo.c b/glx/clientinfo.c index 4aaa4c967..c5fef3074 100644 --- a/glx/clientinfo.c +++ b/glx/clientinfo.c @@ -33,18 +33,21 @@ static int set_client_info(__GLXclientState * cl, xGLXSetClientInfoARBReq * req, unsigned bytes_per_version) { + ClientPtr client = cl->client; char *gl_extensions; char *glx_extensions; + REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq); + /* Verify that the size of the packet matches the size inferred from the * sizes specified for the various fields. */ - const unsigned expected_size = sz_xGLXSetClientInfoARBReq - + (req->numVersions * bytes_per_version) - + __GLX_PAD(req->numGLExtensionBytes) - + __GLX_PAD(req->numGLXExtensionBytes); + int size = sz_xGLXSetClientInfoARBReq; + size = safe_add(size, safe_mul(req->numVersions, bytes_per_version)); + size = safe_add(size, safe_pad(req->numGLExtensionBytes)); + size = safe_add(size, safe_pad(req->numGLXExtensionBytes)); - if (req->length != (expected_size / 4)) + if (size < 0 || req->length != (size / 4)) return BadLength; /* Verify that the actual length of the GL extension string matches what's @@ -80,8 +83,11 @@ __glXDisp_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc) int __glXDispSwap_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc) { + ClientPtr client = cl->client; xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc; + REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq); + req->length = bswap_16(req->length); req->numVersions = bswap_32(req->numVersions); req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes); @@ -99,8 +105,11 @@ __glXDisp_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc) int __glXDispSwap_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc) { + ClientPtr client = cl->client; xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc; + REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq); + req->length = bswap_16(req->length); req->numVersions = bswap_32(req->numVersions); req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes); |