Messages in this thread Patch in this message | | | From | Jan Luebbe <> | Subject | [PATCH v2] lib/dma-debug: check for vmalloc and module addresses used with the DMA-API | Date | Wed, 19 Sep 2012 17:28:36 +0200 |
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Signed-off-by: Jan Luebbe <jlu@pengutronix.de> ---
Changes since v1: - As recommended by Joerg Roedel, check for overlap with vmalloc and module address ranges.
lib/dma-debug.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/lib/dma-debug.c b/lib/dma-debug.c index 66ce414..b35992b 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -944,6 +944,14 @@ static void check_for_illegal_area(struct device *dev, void *addr, unsigned long if (overlap(addr, len, _text, _etext) || overlap(addr, len, __start_rodata, __end_rodata)) err_printk(dev, NULL, "DMA-API: device driver maps memory from kernel text or rodata [addr=%p] [len=%lu]\n", addr, len); +#ifdef CONFIG_MMU + if (overlap(addr, len, (void *)VMALLOC_START, (void *)VMALLOC_END)) + err_printk(dev, NULL, "DMA-API: device driver maps memory from vmalloc address range [addr=%p] [len=%lu]\n", addr, len); +#endif +#if defined(CONFIG_MODULES) && defined(MODULES_VADDR) + if (overlap(addr, len, (void *)MODULES_VADDR, (void *)MODULES_END)) + err_printk(dev, NULL, "DMA-API: device driver maps memory from kernel module address range [addr=%p] [len=%lu]\n", addr, len); +#endif } static void check_sync(struct device *dev, -- 1.7.10.4
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