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-rw-r--r--third_party/lcms/0022-check-LUT-and-MPE.patch170
1 files changed, 170 insertions, 0 deletions
diff --git a/third_party/lcms/0022-check-LUT-and-MPE.patch b/third_party/lcms/0022-check-LUT-and-MPE.patch
new file mode 100644
index 0000000000..04ddac81ed
--- /dev/null
+++ b/third_party/lcms/0022-check-LUT-and-MPE.patch
@@ -0,0 +1,170 @@
+diff --git a/third_party/lcms/src/cmslut.c b/third_party/lcms/src/cmslut.c
+index 9b0eb4b54..19d43361f 100644
+--- a/third_party/lcms/src/cmslut.c
++++ b/third_party/lcms/src/cmslut.c
+@@ -1255,21 +1255,39 @@ cmsStage* CMSEXPORT cmsStageDup(cmsStage* mpe)
+ // ***********************************************************************************************************
+
+ // This function sets up the channel count
+-
+ static
+-void BlessLUT(cmsPipeline* lut)
++cmsBool BlessLUT(cmsPipeline* lut)
+ {
+ // We can set the input/ouput channels only if we have elements.
+ if (lut ->Elements != NULL) {
+
+- cmsStage *First, *Last;
++ cmsStage* prev;
++ cmsStage* next;
++ cmsStage* First;
++ cmsStage* Last;
+
+ First = cmsPipelineGetPtrToFirstStage(lut);
+ Last = cmsPipelineGetPtrToLastStage(lut);
+
+- if (First != NULL)lut ->InputChannels = First ->InputChannels;
+- if (Last != NULL) lut ->OutputChannels = Last ->OutputChannels;
++ if (First == NULL || Last == NULL) return FALSE;
++
++ lut->InputChannels = First->InputChannels;
++ lut->OutputChannels = Last->OutputChannels;
++
++ // Check chain consistency
++ prev = First;
++ next = prev->Next;
++
++ while (next != NULL)
++ {
++ if (next->InputChannels != prev->OutputChannels)
++ return FALSE;
++
++ next = next->Next;
++ prev = prev->Next;
++ }
+ }
++ return TRUE;
+ }
+
+
+@@ -1331,6 +1349,7 @@ cmsPipeline* CMSEXPORT cmsPipelineAlloc(cmsContext ContextID, cmsUInt32Number In
+ {
+ cmsPipeline* NewLUT;
+
++ // A value of zero in channels is allowed as placeholder
+ if (InputChannels >= cmsMAXCHANNELS ||
+ OutputChannels >= cmsMAXCHANNELS) return NULL;
+
+@@ -1348,7 +1367,11 @@ cmsPipeline* CMSEXPORT cmsPipelineAlloc(cmsContext ContextID, cmsUInt32Number In
+ NewLUT ->Data = NewLUT;
+ NewLUT ->ContextID = ContextID;
+
+- BlessLUT(NewLUT);
++ if (!BlessLUT(NewLUT))
++ {
++ _cmsFree(ContextID, NewLUT);
++ return NULL;
++ }
+
+ return NewLUT;
+ }
+@@ -1454,7 +1477,12 @@ cmsPipeline* CMSEXPORT cmsPipelineDup(const cmsPipeline* lut)
+
+ NewLUT ->SaveAs8Bits = lut ->SaveAs8Bits;
+
+- BlessLUT(NewLUT);
++ if (!BlessLUT(NewLUT))
++ {
++ _cmsFree(lut->ContextID, NewLUT);
++ return NULL;
++ }
++
+ return NewLUT;
+ }
+
+@@ -1491,8 +1519,7 @@ int CMSEXPORT cmsPipelineInsertStage(cmsPipeline* lut, cmsStageLoc loc, cmsStage
+ return FALSE;
+ }
+
+- BlessLUT(lut);
+- return TRUE;
++ return BlessLUT(lut);
+ }
+
+ // Unlink an element and return the pointer to it
+@@ -1547,6 +1574,7 @@ void CMSEXPORT cmsPipelineUnlinkStage(cmsPipeline* lut, cmsStageLoc loc, cmsStag
+ else
+ cmsStageFree(Unlinked);
+
++ // May fail, but we ignore it
+ BlessLUT(lut);
+ }
+
+@@ -1573,8 +1601,7 @@ cmsBool CMSEXPORT cmsPipelineCat(cmsPipeline* l1, const cmsPipeline* l2)
+ return FALSE;
+ }
+
+- BlessLUT(l1);
+- return TRUE;
++ return BlessLUT(l1);
+ }
+
+
+diff --git a/third_party/lcms/src/cmstypes.c b/third_party/lcms/src/cmstypes.c
+index e5ed06c33..0256e247b 100644
+--- a/third_party/lcms/src/cmstypes.c
++++ b/third_party/lcms/src/cmstypes.c
+@@ -1755,8 +1755,8 @@ void *Type_LUT8_Read(struct _cms_typehandler_struct* self, cmsIOHANDLER* io, cms
+ if (!_cmsReadUInt8Number(io, NULL)) goto Error;
+
+ // Do some checking
+- if (InputChannels > cmsMAXCHANNELS) goto Error;
+- if (OutputChannels > cmsMAXCHANNELS) goto Error;
++ if (InputChannels == 0 || InputChannels > cmsMAXCHANNELS) goto Error;
++ if (OutputChannels == 0 || OutputChannels > cmsMAXCHANNELS) goto Error;
+
+ // Allocates an empty Pipeline
+ NewLUT = cmsPipelineAlloc(self ->ContextID, InputChannels, OutputChannels);
+@@ -2048,8 +2048,8 @@ void *Type_LUT16_Read(struct _cms_typehandler_struct* self, cmsIOHANDLER* io, cm
+ if (!_cmsReadUInt8Number(io, NULL)) return NULL;
+
+ // Do some checking
+- if (InputChannels > cmsMAXCHANNELS) goto Error;
+- if (OutputChannels > cmsMAXCHANNELS) goto Error;
++ if (InputChannels == 0 || InputChannels > cmsMAXCHANNELS) goto Error;
++ if (OutputChannels == 0 || OutputChannels > cmsMAXCHANNELS) goto Error;
+
+ // Allocates an empty LUT
+ NewLUT = cmsPipelineAlloc(self ->ContextID, InputChannels, OutputChannels);
+@@ -2486,7 +2486,10 @@ void* Type_LUTA2B_Read(struct _cms_typehandler_struct* self, cmsIOHANDLER* io, c
+ if (!_cmsReadUInt32Number(io, &offsetC)) return NULL;
+ if (!_cmsReadUInt32Number(io, &offsetA)) return NULL;
+
+- // Allocates an empty LUT
++ if (inputChan == 0 || inputChan >= cmsMAXCHANNELS) return NULL;
++ if (outputChan == 0 || outputChan >= cmsMAXCHANNELS) return NULL;
++
++ // Allocates an empty LUT
+ NewLUT = cmsPipelineAlloc(self ->ContextID, inputChan, outputChan);
+ if (NewLUT == NULL) return NULL;
+
+@@ -2794,6 +2797,9 @@ void* Type_LUTB2A_Read(struct _cms_typehandler_struct* self, cmsIOHANDLER* io, c
+ if (!_cmsReadUInt8Number(io, &inputChan)) return NULL;
+ if (!_cmsReadUInt8Number(io, &outputChan)) return NULL;
+
++ if (inputChan == 0 || inputChan >= cmsMAXCHANNELS) return NULL;
++ if (outputChan == 0 || outputChan >= cmsMAXCHANNELS) return NULL;
++
+ // Padding
+ if (!_cmsReadUInt16Number(io, NULL)) return NULL;
+
+@@ -4443,6 +4449,9 @@ void *Type_MPE_Read(struct _cms_typehandler_struct* self, cmsIOHANDLER* io, cmsU
+ if (!_cmsReadUInt16Number(io, &InputChans)) return NULL;
+ if (!_cmsReadUInt16Number(io, &OutputChans)) return NULL;
+
++ if (InputChans == 0 || InputChans >= cmsMAXCHANNELS) return NULL;
++ if (OutputChans == 0 || OutputChans >= cmsMAXCHANNELS) return NULL;
++
+ // Allocates an empty LUT
+ NewLUT = cmsPipelineAlloc(self ->ContextID, InputChans, OutputChans);
+ if (NewLUT == NULL) return NULL;