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-rw-r--r--src/gui/image/qpnghandler.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/gui/image/qpnghandler.cpp b/src/gui/image/qpnghandler.cpp
index a4d669b..1a78bae 100644
--- a/src/gui/image/qpnghandler.cpp
+++ b/src/gui/image/qpnghandler.cpp
@@ -156,10 +156,11 @@ void CALLBACK_CALL_TYPE iod_read_fn(png_structp png_ptr, png_bytep data, png_siz
QPngHandlerPrivate *d = (QPngHandlerPrivate *)png_get_io_ptr(png_ptr);
QIODevice *in = d->q->device();
- if (d->state == QPngHandlerPrivate::ReadingEnd && in->atEnd() && length == 4) {
+ if (d->state == QPngHandlerPrivate::ReadingEnd && !in->isSequential() && (in->size() - in->pos()) < 4 && length == 4) {
// Workaround for certain malformed PNGs that lack the final crc bytes
uchar endcrc[4] = { 0xae, 0x42, 0x60, 0x82 };
qMemCopy(data, endcrc, 4);
+ in->seek(in->size());
return;
}