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authorAdam Jackson <ajax@redhat.com>2014-11-10 12:13:37 -0500
committerMike Gabriel <mike.gabriel@das-netzwerkteam.de>2015-02-14 16:14:32 +0100
commitcdf0c3e65670c797a4fd0617d44d2bdff4011815 (patch)
treed2dfc723c1bba6728636eee94c631994874c1807 /nx-X11/programs/Xserver/GL/glx/singlepix.c
parent5c43bb2484414b37115dac56dc76f1ecf4c05837 (diff)
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glx: Be more strict about rejecting invalid image sizes [CVE-2014-8093 2/6]
Before this we'd just clamp the image size to 0, which was just hideously stupid; if the parameters were such that they'd overflow an integer, you'd allocate a small buffer, then pass huge values into (say) ReadPixels, and now you're scribbling over arbitrary server memory. v2: backport to nx-libs 3.6.x (Mike DePaulo) 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> 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/singlepix.c')
-rw-r--r--nx-X11/programs/Xserver/GL/glx/singlepix.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/nx-X11/programs/Xserver/GL/glx/singlepix.c b/nx-X11/programs/Xserver/GL/glx/singlepix.c
index 845c46a64..be804d82e 100644
--- a/nx-X11/programs/Xserver/GL/glx/singlepix.c
+++ b/nx-X11/programs/Xserver/GL/glx/singlepix.c
@@ -70,7 +70,7 @@ int __glXDisp_ReadPixels(__GLXclientState *cl, GLbyte *pc)
swapBytes = *(GLboolean *)(pc + 24);
lsbFirst = *(GLboolean *)(pc + 25);
compsize = __glReadPixels_size(format,type,width,height);
- if (compsize < 0) compsize = 0;
+ if (compsize < 0) return BadLength;
glPixelStorei(GL_PACK_SWAP_BYTES, swapBytes);
glPixelStorei(GL_PACK_LSB_FIRST, lsbFirst);
@@ -130,7 +130,7 @@ int __glXDisp_GetTexImage(__GLXclientState *cl, GLbyte *pc)
* are illegal, but then width, height, and depth would still be zero anyway.
*/
compsize = __glGetTexImage_size(target,level,format,type,width,height,depth);
- if (compsize < 0) compsize = 0;
+ if (compsize < 0) return BadLength;
glPixelStorei(GL_PACK_SWAP_BYTES, swapBytes);
__GLX_GET_ANSWER_BUFFER(answer,cl,compsize,1);
@@ -227,7 +227,7 @@ int __glXDisp_GetSeparableFilter(__GLXclientState *cl, GLbyte *pc)
compsize = __glGetTexImage_size(target,1,format,type,width,1,1);
compsize2 = __glGetTexImage_size(target,1,format,type,height,1,1);
- if (compsize < 0) compsize = 0;
+ if (compsize < 0) return BadLength;
if (compsize2 < 0) compsize2 = 0;
compsize = __GLX_PAD(compsize);
compsize2 = __GLX_PAD(compsize2);
@@ -291,7 +291,7 @@ int __glXDisp_GetConvolutionFilter(__GLXclientState *cl, GLbyte *pc)
* are illegal, but then width and height would still be zero anyway.
*/
compsize = __glGetTexImage_size(target,1,format,type,width,height,1);
- if (compsize < 0) compsize = 0;
+ if (compsize < 0) return BadLength;
glPixelStorei(GL_PACK_SWAP_BYTES, swapBytes);
__GLX_GET_ANSWER_BUFFER(answer,cl,compsize,1);
@@ -346,7 +346,7 @@ int __glXDisp_GetHistogram(__GLXclientState *cl, GLbyte *pc)
* are illegal, but then width would still be zero anyway.
*/
compsize = __glGetTexImage_size(target,1,format,type,width,1,1);
- if (compsize < 0) compsize = 0;
+ if (compsize < 0) return BadLength;
glPixelStorei(GL_PACK_SWAP_BYTES, swapBytes);
__GLX_GET_ANSWER_BUFFER(answer,cl,compsize,1);
@@ -389,7 +389,7 @@ int __glXDisp_GetMinmax(__GLXclientState *cl, GLbyte *pc)
reset = *(GLboolean *)(pc + 13);
compsize = __glGetTexImage_size(target,1,format,type,2,1,1);
- if (compsize < 0) compsize = 0;
+ if (compsize < 0) return BadLength;
glPixelStorei(GL_PACK_SWAP_BYTES, swapBytes);
__GLX_GET_ANSWER_BUFFER(answer,cl,compsize,1);
@@ -436,7 +436,7 @@ int __glXDisp_GetColorTable(__GLXclientState *cl, GLbyte *pc)
* are illegal, but then width would still be zero anyway.
*/
compsize = __glGetTexImage_size(target,1,format,type,width,1,1);
- if (compsize < 0) compsize = 0;
+ if (compsize < 0) return BadLength;
glPixelStorei(GL_PACK_SWAP_BYTES, swapBytes);
__GLX_GET_ANSWER_BUFFER(answer,cl,compsize,1);