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[client] main: validate damage metadata

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This commit is contained in:
Geoffrey McRae
2026-07-19 01:04:09 +10:00
parent d8dee8806b
commit 45114c75c8
1 changed files with 20 additions and 1 deletions
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21
client/src/main.c
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@@ -826,9 +826,28 @@ int main_frameThread(void * unused)
}
}
uint32_t damageRectsCount =
frame->damageRectsCount <= KVMFR_MAX_DAMAGE_RECTS ?
frame->damageRectsCount : 0;
bool invalidDamage = damageRectsCount != frame->damageRectsCount;
for (uint32_t i = 0; !invalidDamage && i < damageRectsCount; ++i)
{
const FrameDamageRect * rect = frame->damageRects + i;
invalidDamage =
rect->x > frame->frameWidth ||
rect->y > frame->frameHeight ||
rect->width > frame->frameWidth - rect->x ||
rect->height > frame->frameHeight - rect->y;
}
if (unlikely(invalidDamage))
{
DEBUG_WARN("Invalid damage rectangles, forcing a full update");
damageRectsCount = 0;
}
FrameBuffer * fb = (FrameBuffer *)(((uint8_t*)frame) + frame->offset);
if (!RENDERER(onFrame, fb, g_state.useDMA ? dma->fd : -1,
frame->damageRects, frame->damageRectsCount))
frame->damageRects, damageRectsCount))
{
lgmpClientMessageDone(queue);
DEBUG_ERROR("renderer on frame returned failure");