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Date: Wed, 28 Sep 2011 15:03:05 -0700 From: Greg KH <gregkh@...e.de> To: linux-kernel@...r.kernel.org, stable@...nel.org Cc: stable-review@...nel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Russell King <rmk+kernel@....linux.org.uk> Subject: [221/244] ARM: dma-mapping: free allocated page if unable to map 3.0-stable review patch. If anyone has any objections, please let us know. ------------------ From: Russell King <rmk+kernel@....linux.org.uk> commit d8e89b47e00ee80e920761145144640aac4cf71a upstream. If the attempt to map a page for DMA fails (eg, because we're out of mapping space) then we must not hold on to the page we allocated for DMA - doing so will result in a memory leak. Reported-by: Bryan Phillippe <bp@...kforest.org> Tested-by: Bryan Phillippe <bp@...kforest.org> Signed-off-by: Russell King <rmk+kernel@....linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- arch/arm/mm/dma-mapping.c | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -322,6 +322,8 @@ __dma_alloc(struct device *dev, size_t s if (addr) *handle = pfn_to_dma(dev, page_to_pfn(page)); + else + __dma_free_buffer(page, size); return addr; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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