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b=WcL3QMmdq/toVX/XFR74B7CnI4w41g9EyiWLrVJdG2tbMAUcCsvNHSHaAfWhwvATu zhOkW/kMM/P0Q3XuKu2qp6p9HaB1uiQSBS/10FXBGt9AEQnQUqVUq65TdZt9OgzuY2 LBtTcNXNX6jA9LcxOYNdZ5OlrD/WVQ9VX8rU7B/k= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from ls3530.fritz.box ([92.116.138.108]) by mail.gmx.com (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MiacH-1kg8vl3MQB-00fl0A; Tue, 28 Jul 2020 21:35:54 +0200 From: Helge Deller To: peter.maydell@linaro.org, qemu-devel@nongnu.org Subject: [PULL 4/4] hw/display/artist.c: fix out of bounds check Date: Tue, 28 Jul 2020 21:35:50 +0200 Message-Id: <20200728193550.3578-5-deller@gmx.de> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200728193550.3578-1-deller@gmx.de> References: <20200728193550.3578-1-deller@gmx.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:LGaJml0GLvbGQRMhjogaFfwQp4ZT/JuBFoBlq9WFE5xvGkeBwfb s6DJEw4PL/wM2NweBNZ9FbfuIZry7DgczD0VgDEXsgnFTRTFn7slj2vFgrOL7Pdbg79A1eO /7NmPqYDWLRx/yEpBBJKz0qwuhkxSSdN/YJAmc1UosGoFse9xxMfWtZQaugLfvy16Xn+i5P y35QKtkhcdHkmoa4UAbQA== X-UI-Out-Filterresults: notjunk:1;V03:K0:xqfOICqRK5o=:rGY3Lg7KDMynLjul0ainlw l8X3Wa+hj66CulPIr1LAXtZ1/qv/Nd5VBj7wpzGyD+vaVS4KAJA1M7t2+IYyei6VNpBp7WPwO aoIcWX1SS3HGD1U1i8C337FH65s9dP+6JuNa9+5HGIoJIil9uv6im8GVbIc1UHS+fvsNInc1e PRvHcyRAd6+551oju1EOA2TSV03Pek/YcQTOMO1MuyGtqtzLt41eJx6pbUMznVKREtfcGkg4M kpkJ0s54GiD344KIEpYbl8moZitqR8vqul2LHNCjntoliFJEWPThhI0sdwTEE4mgJ8RG5LNPM 5fJDTldrqFBllRuAaFLMw5zBuBGoDGWyhZ0axtTDOVLPU4oRhuBzts21+4knfYgyAiDv91Zn7 aEf2NHgKF90DYk0MIeO5jlHrR6b9IkvFxax93f8eqUHTMto6u0SKPAZnKrveMhJ0Vbn0c8MdP EO3UwwSeWqEICVlgWgdl7IT2odrPnFvS+StL5yuBFeJ79mQ40pHzfj/tJsdSxQKr1qE256cjU KyByl42/81E8xXIv8XmguL0a6eAdLUR2yPuMA+QNR0ag1rlM1Y3rffiiKsCkzeUv+X3Yv6gip CkhR78Ply5IO+wE65hJ/YyNb+5yY+drPRQk9Jh+l7Mx5vbr07cbwp9TQA8aF02hMb49jwN0/L eUUmG5jwQWAPWn6qYyx+HdooCGnHhUkiflhkN4ujvsTOq/YmaVhdoxUYtK5iZiPAvkJwEPVzk mFhUJIEvzoqdYQyttWZClc2fIXndlu+6PxYUEtDZZfyG0KBlykLFj2BadypjYinhYNxaMFjkM e9D9I2GgUCLhv0zTf2Xdll7UDdKj4jtnCiJ9y7w3l70hRpssC0UZLEP2h2HuL7Ih7cH5GHPHK 89XtcRRSCfTdLU1FYDqVEHTcF6BbwsV6V/Fmw+/XX5APtv9trz0hbZripnuDE3sgy9y5CysZ7 Q6YT4qPfwcrnQ4omyJK/01zf3MXQSERiGKkMPYdU9w0vX0alya4lHS5K6QRr7lzbVmltm0l+L 15V6BlptfeUqZsm2WJbUCXmefs6EmEX+WAZeGvCZbVqjI11TjY2oNLa2nJ6fdZHZjGTAIsQFM 2bcv5D/QAKduGm8nol6tZPRHFSovEgOwcCYQkJnKt1eT/hKxCtQHknHTFurGGy9CQwPkkNXJw Mk0K301DtgTKysnQJRqLgFJWQjB3gKVAwhuVttbl/BY9qb29ogzbCIySeM3zPYBDJVjc+PkCs 1j4KxzcAF2PIzr2Jc Received-SPF: pass client-ip=212.227.15.18; envelope-from=deller@gmx.de; helo=mout.gmx.net X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/28 15:35:59 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Helge Deller , Sven Schnelle , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Sven Schnelle Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller =2D-- hw/display/artist.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/hw/display/artist.c b/hw/display/artist.c index 6261bfe65b..46043ec895 100644 =2D-- a/hw/display/artist.c +++ b/hw/display/artist.c @@ -340,14 +340,13 @@ static void vram_bit_write(ARTISTState *s, int posx,= int posy, bool incr_x, { struct vram_buffer *buf; uint32_t vram_bitmask =3D s->vram_bitmask; - int mask, i, pix_count, pix_length, offset, height, width; + int mask, i, pix_count, pix_length, offset, width; uint8_t *data8, *p; pix_count =3D vram_write_pix_per_transfer(s); pix_length =3D vram_pixel_length(s); buf =3D vram_write_buffer(s); - height =3D buf->height; width =3D buf->width; if (s->cmap_bm_access) { @@ -367,20 +366,13 @@ static void vram_bit_write(ARTISTState *s, int posx,= int posy, bool incr_x, pix_count =3D size * 8; } - if (posy * width + posx + pix_count > buf->size) { - qemu_log("write outside bounds: wants %dx%d, max size %dx%d\n", - posx, posy, width, height); - return; - } - - switch (pix_length) { case 0: if (s->image_bitmap_op & 0x20000000) { data &=3D vram_bitmask; } - for (i =3D 0; i < pix_count; i++) { + for (i =3D 0; i < pix_count && offset + i < buf->size; i++) { artist_rop8(s, p + offset + pix_count - 1 - i, (data & 1) ? (s->plane_mask >> 24) : 0); data >>=3D 1; @@ -398,7 +390,9 @@ static void vram_bit_write(ARTISTState *s, int posx, i= nt posy, bool incr_x, for (i =3D 3; i >=3D 0; i--) { if (!(s->image_bitmap_op & 0x20000000) || s->vram_bitmask & (1 << (28 + i))) { - artist_rop8(s, p + offset + 3 - i, data8[ROP8OFF(i)]); + if (offset + 3 - i < buf->size) { + artist_rop8(s, p + offset + 3 - i, data8[ROP8OFF(i)])= ; + } } } memory_region_set_dirty(&buf->mr, offset, 3); @@ -420,7 +414,7 @@ static void vram_bit_write(ARTISTState *s, int posx, i= nt posy, bool incr_x, break; } - for (i =3D 0; i < pix_count; i++) { + for (i =3D 0; i < pix_count && offset + i < buf->size; i++) { mask =3D 1 << (pix_count - 1 - i); if (!(s->image_bitmap_op & 0x20000000) || =2D- 2.21.3