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Bug 1687268: Prevent Obj-C exceptions caused by attempts to insert NULL objects into a dictionary. r=mstange

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Differential Revision: https://phabricator.services.mozilla.com/D102235
This commit is contained in:
Stephen A Pohl 2021-01-18 21:45:45 +00:00
parent fa6b797928
commit 0e81772176
1 changed files with 37 additions and 17 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

52
widget/cocoa/nsClipboard.mm
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@ -174,7 +174,10 @@ nsresult nsClipboard::TransferableFromPasteboard(nsITransferable* aTransferable,
NSString* pboardType = nil;
if (nsClipboard::IsStringType(flavorStr, &pboardType)) {
NSString* pString = [cocoaPasteboard stringForType:pboardType];
if (!pString) continue;
if (!pString) {
[pboardType release];
continue;
}
NSData* stringData;
if ([pboardType isEqualToString:[UTIHelper stringFromPboardType:NSPasteboardTypeRTF]]) {
@ -209,6 +212,7 @@ nsresult nsClipboard::TransferableFromPasteboard(nsITransferable* aTransferable,
getter_AddRefs(genericDataWrapper));
aTransferable->SetTransferData(flavorStr.get(), genericDataWrapper);
free(clipboardDataPtr);
[pboardType release];
break;
} else if (flavorStr.EqualsLiteral(kCustomTypesMime)) {
NSString* type = [cocoaPasteboard
@ -226,7 +230,6 @@ nsresult nsClipboard::TransferableFromPasteboard(nsITransferable* aTransferable,
unsigned int dataLength = [pasteboardData length];
void* clipboardDataPtr = malloc(dataLength);
if (!clipboardDataPtr) {
[pboardType release];
return NS_ERROR_OUT_OF_MEMORY;
}
[pasteboardData getBytes:clipboardDataPtr length:dataLength];
@ -301,7 +304,6 @@ nsresult nsClipboard::TransferableFromPasteboard(nsITransferable* aTransferable,
else
continue;
}
[pboardType release];
}
return NS_OK;
@ -389,14 +391,15 @@ nsClipboard::HasDataMatchingFlavors(const nsTArray<nsCString>& aFlavorList, int3
for (auto& mimeType : aFlavorList) {
NSString* pboardType = nil;
if (nsClipboard::IsStringType(mimeType, &pboardType)) {
NSString* availableType =
[generalPBoard availableTypeFromArray:[NSArray arrayWithObject:pboardType]];
if (availableType && [availableType isEqualToString:pboardType]) {
[pboardType release];
*outResult = true;
break;
}
[pboardType release];
} else if (mimeType.EqualsLiteral(kCustomTypesMime)) {
NSString* availableType = [generalPBoard
availableTypeFromArray:
@ -416,7 +419,6 @@ nsClipboard::HasDataMatchingFlavors(const nsTArray<nsCString>& aFlavorList, int3
break;
}
}
[pboardType release];
}
return NS_OK;
@ -437,13 +439,17 @@ nsClipboard::SupportsFindClipboard(bool* _retval) {
NSDictionary* nsClipboard::PasteboardDictFromTransferable(nsITransferable* aTransferable) {
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
if (!aTransferable) return nil;
if (!aTransferable) {
return nil;
}
NSMutableDictionary* pasteboardOutputDict = [NSMutableDictionary dictionary];
nsTArray<nsCString> flavors;
nsresult rv = aTransferable->FlavorsTransferableCanExport(flavors);
if (NS_FAILED(rv)) return nil;
if (NS_FAILED(rv)) {
return nil;
}
for (uint32_t i = 0; i < flavors.Length(); i++) {
nsCString& flavorStr = flavors[i];
@ -452,7 +458,6 @@ NSDictionary* nsClipboard::PasteboardDictFromTransferable(nsITransferable* aTran
("writing out clipboard data of type %s (%d)\n", flavorStr.get(), i));
NSString* pboardType = nil;
if (nsClipboard::IsStringType(flavorStr, &pboardType)) {
nsCOMPtr<nsISupports> genericDataWrapper;
rv = aTransferable->GetTransferData(flavorStr.get(), getter_AddRefs(genericDataWrapper));
@ -467,16 +472,19 @@ NSDictionary* nsClipboard::PasteboardDictFromTransferable(nsITransferable* aTran
}
NSString* nativeString;
if (!data.IsEmpty())
if (!data.IsEmpty()) {
nativeString = [NSString stringWithCharacters:(const unichar*)data.get()
length:data.Length()];
else
} else {
nativeString = [NSString string];
}
// be nice to Carbon apps, normalize the receiver's contents using Form C.
nativeString = [nativeString precomposedStringWithCanonicalMapping];
if (nativeString) {
[pasteboardOutputDict setObject:nativeString forKey:pboardType];
}
[pboardType release];
} else if (flavorStr.EqualsLiteral(kCustomTypesMime)) {
nsCOMPtr<nsISupports> genericDataWrapper;
rv = aTransferable->GetTransferData(flavorStr.get(), getter_AddRefs(genericDataWrapper));
@ -492,6 +500,9 @@ NSDictionary* nsClipboard::PasteboardDictFromTransferable(nsITransferable* aTran
if (!data.IsEmpty()) {
NSData* nativeData = [NSData dataWithBytes:data.get() length:data.Length()];
NSString* customType = [UTIHelper stringFromPboardType:kMozCustomTypesPboardType];
if (!nativeData) {
continue;
}
[pasteboardOutputDict setObject:nativeData forKey:customType];
}
} else if (flavorStr.EqualsLiteral(kPNGImageMime) || flavorStr.EqualsLiteral(kJPEGImageMime) ||
@ -529,16 +540,20 @@ NSDictionary* nsClipboard::PasteboardDictFromTransferable(nsITransferable* aTran
bool successfullyConverted = CGImageDestinationFinalize(destRef);
CGImageRelease(imageRef);
if (destRef) CFRelease(destRef);
if (destRef) {
CFRelease(destRef);
}
if (!successfullyConverted) {
if (tiffData) CFRelease(tiffData);
if (!successfullyConverted || !tiffData) {
if (tiffData) {
CFRelease(tiffData);
}
continue;
}
NSString* tiffType = [UTIHelper stringFromPboardType:NSPasteboardTypeTIFF];
[pasteboardOutputDict setObject:(NSMutableData*)tiffData forKey:tiffType];
if (tiffData) CFRelease(tiffData);
CFRelease(tiffData);
} else if (flavorStr.EqualsLiteral(kFileMime)) {
nsCOMPtr<nsISupports> genericFile;
rv = aTransferable->GetTransferData(flavorStr.get(), getter_AddRefs(genericFile));
@ -560,6 +575,9 @@ NSDictionary* nsClipboard::PasteboardDictFromTransferable(nsITransferable* aTran
NSString* str = nsCocoaUtils::ToNSString(fileURI);
NSURL* url = [NSURL fileURLWithPath:str isDirectory:NO];
NSString* fileUTType = [UTIHelper stringFromPboardType:(NSString*)kUTTypeFileURL];
if (!url || ![url absoluteString]) {
continue;
}
[pasteboardOutputDict setObject:[url absoluteString] forKey:fileUTType];
} else if (flavorStr.EqualsLiteral(kFilePromiseMime)) {
NSString* urlPromise =
@ -601,6 +619,9 @@ NSDictionary* nsClipboard::PasteboardDictFromTransferable(nsITransferable* aTran
NSString* nativeURL = [NSString stringWithUTF8String:escData.get()];
NSString* publicUrl = [UTIHelper stringFromPboardType:kPublicUrlPboardType];
if (!nativeURL) {
continue;
}
[pasteboardOutputDict setObject:nativeURL forKey:publicUrl];
if (nativeTitle) {
NSArray* urlsAndTitles = @[ @[ nativeURL ], @[ nativeTitle ] ];
@ -610,7 +631,6 @@ NSDictionary* nsClipboard::PasteboardDictFromTransferable(nsITransferable* aTran
[pasteboardOutputDict setObject:urlsAndTitles forKey:urlsWithTitles];
}
}
[pboardType release];
// If it wasn't a type that we recognize as exportable we don't put it on the system
// clipboard. We'll just access it from our cached transferable when we need it.
}