From 5104a529ce5aea5e94101770ece188b98f20baaa Mon Sep 17 00:00:00 2001 From: Eirik Aavitsland Date: Tue, 4 Sep 2018 11:08:06 +0200 Subject: bmp image handler: check for out of range image size Make the decoder fail early to avoid spending time and memory on attempting to decode a corrupt image file. Change-Id: I874e04f3b43122d73f8e58c7a5bcc4a741b68264 Reviewed-by: Lars Knoll (cherry picked from commit 621ab8ab59901cc3f9bd98be709929c9eac997a8) Reviewed-by: Liang Qi --- src/gui/image/qbmphandler.cpp | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/gui/image/qbmphandler.cpp b/src/gui/image/qbmphandler.cpp index 703c5c0f31..6990d69b35 100644 --- a/src/gui/image/qbmphandler.cpp +++ b/src/gui/image/qbmphandler.cpp @@ -188,6 +188,8 @@ static bool read_dib_infoheader(QDataStream &s, BMP_INFOHDR &bi) if (!(comp == BMP_RGB || (nbits == 4 && comp == BMP_RLE4) || (nbits == 8 && comp == BMP_RLE8) || ((nbits == 16 || nbits == 32) && comp == BMP_BITFIELDS))) return false; // weird compression type + if (bi.biWidth < 0 || quint64(bi.biWidth) * qAbs(bi.biHeight) > 16384 * 16384) + return false; return true; } -- cgit v1.2.3