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LZ4: Fix output buffer size

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This commit is contained in:
Javier Celaya 2015-01-28 11:49:44 +01:00 committed by Christophe Fergeau
parent ac26fd7acb
commit 6049db492f
1 changed files with 4 additions and 2 deletions
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6
common/canvas_base.c
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@ -521,7 +521,7 @@ static pixman_image_t *canvas_get_jpeg(CanvasBase *canvas, SpiceImage *image)
static pixman_image_t *canvas_get_lz4(CanvasBase *canvas, SpiceImage *image)
{
pixman_image_t *surface = NULL;
int dec_size, enc_size;
int dec_size, enc_size, available;
int stride;
int stride_abs;
uint8_t *dest, *data, *data_end;
@ -550,6 +550,7 @@ static pixman_image_t *canvas_get_lz4(CanvasBase *canvas, SpiceImage *image)
dest = (uint8_t *)pixman_image_get_data(surface);
stride = pixman_image_get_stride(surface);
stride_abs = abs(stride);
available = height * stride_abs;
if (direction == 1) {
dest -= (stride_abs * (height - 1));
}
@ -559,7 +560,7 @@ static pixman_image_t *canvas_get_lz4(CanvasBase *canvas, SpiceImage *image)
enc_size = ntohl(*((uint32_t *)data));
data += 4;
dec_size = LZ4_decompress_safe_continue(stream, (const char *) data,
(char *) dest, enc_size, height * stride_abs);
(char *) dest, enc_size, available);
if (dec_size <= 0) {
spice_warning("Error decoding LZ4 block\n");
pixman_image_unref(surface);
@ -567,6 +568,7 @@ static pixman_image_t *canvas_get_lz4(CanvasBase *canvas, SpiceImage *image)
break;
}
dest += dec_size;
available -= dec_size;
data += enc_size;
} while (data < data_end);