diff options
| author | Rohit Vaswani <rvaswani@codeaurora.org> | 2015-10-22 13:32:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-10-23 17:55:10 +0900 |
| commit | 67a2e213e7e937c41c52ab5bc46bf3f4de469f6e (patch) | |
| tree | 7bc4c737953328c9deda1704bcfb1d7432b4b6b2 | |
| parent | 5211613978cb7353a3237e4372958c0e7514683f (diff) | |
mm: cma: fix incorrect type conversion for size during dma allocation
This was found during userspace fuzzing test when a large size dma cma
allocation is made by driver(like ion) through userspace.
show_stack+0x10/0x1c
dump_stack+0x74/0xc8
kasan_report_error+0x2b0/0x408
kasan_report+0x34/0x40
__asan_storeN+0x15c/0x168
memset+0x20/0x44
__dma_alloc_coherent+0x114/0x18c
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/base/dma-contiguous.c | 2 | ||||
| -rw-r--r-- | include/linux/cma.h | 2 | ||||
| -rw-r--r-- | include/linux/dma-contiguous.h | 4 | ||||
| -rw-r--r-- | mm/cma.c | 4 |
4 files changed, 6 insertions, 6 deletions
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c index 950fff9ce453..a12ff9863d7e 100644 --- a/drivers/base/dma-contiguous.c +++ b/drivers/base/dma-contiguous.c @@ -187,7 +187,7 @@ int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base, * global one. Requires architecture specific dev_get_cma_area() helper * function. */ -struct page *dma_alloc_from_contiguous(struct device *dev, int count, +struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, unsigned int align) { if (align > CONFIG_CMA_ALIGNMENT) diff --git a/include/linux/cma.h b/include/linux/cma.h index f7ef093ec49a..29f9e774ab76 100644 --- a/include/linux/cma.h +++ b/include/linux/cma.h @@ -26,6 +26,6 @@ extern int __init cma_declare_contiguous(phys_addr_t base, extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, unsigned int order_per_bit, struct cma **res_cma); -extern struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align); +extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align); extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); #endif diff --git a/include/linux/dma-contiguous.h b/include/linux/dma-contiguous.h index 569bbd039896..fec734df1524 100644 --- a/include/linux/dma-contiguous.h +++ b/include/linux/dma-contiguous.h @@ -111,7 +111,7 @@ static inline int dma_declare_contiguous(struct device *dev, phys_addr_t size, return ret; } -struct page *dma_alloc_from_contiguous(struct device *dev, int count, +struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, unsigned int order); bool dma_release_from_contiguous(struct device *dev, struct page *pages, int count); @@ -144,7 +144,7 @@ int dma_declare_contiguous(struct device *dev, phys_addr_t size, } static inline -struct page *dma_alloc_from_contiguous(struct device *dev, int count, +struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, unsigned int order) { return NULL; @@ -361,7 +361,7 @@ err: * This function allocates part of contiguous memory on specific * contiguous memory area. */ -struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align) +struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align) { unsigned long mask, offset, pfn, start = 0; unsigned long bitmap_maxno, bitmap_no, bitmap_count; @@ -371,7 +371,7 @@ struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align) if (!cma || !cma->count) return NULL; - pr_debug("%s(cma %p, count %d, align %d)\n", __func__, (void *)cma, + pr_debug("%s(cma %p, count %zu, align %d)\n", __func__, (void *)cma, count, align); if (!count) |