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80 lines
3.0 KiB
Diff
80 lines
3.0 KiB
Diff
From 5479a3c164c8762b5bf91c5fae452882366adb6a Mon Sep 17 00:00:00 2001
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From: Maggie White <maggiewhite@google.com>
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Date: Wed, 5 Jul 2017 16:47:15 -0700
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Subject: mm: Fix incorrect type conversion for size during dma allocation
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This was found during userspace fuzzing test when a large size
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allocation is made from ion
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[<ffffffc00008a098>] show_stack+0x10/0x1c
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[<ffffffc00119c390>] dump_stack+0x74/0xc8
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[<ffffffc00020d9a0>] kasan_report_error+0x2b0/0x408
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[<ffffffc00020dbd4>] kasan_report+0x34/0x40
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[<ffffffc00020cfec>] __asan_storeN+0x15c/0x168
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[<ffffffc00020d228>] memset+0x20/0x44
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[<ffffffc00009b730>] __dma_alloc_coherent+0x114/0x18c
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[<ffffffc00009c6e8>] __dma_alloc_noncoherent+0xbc/0x19c
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[<ffffffc000c2b3e0>] ion_cma_allocate+0x178/0x2f0
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[<ffffffc000c2b750>] ion_secure_cma_allocate+0xdc/0x190
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[<ffffffc000c250dc>] ion_alloc+0x264/0xb88
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[<ffffffc000c25e94>] ion_ioctl+0x1f4/0x480
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[<ffffffc00022f650>] do_vfs_ioctl+0x67c/0x764
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[<ffffffc00022f790>] SyS_ioctl+0x58/0x8c
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Bug: 38195738
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Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
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Signed-off-by: Maggie White <maggiewhite@google.com>
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Change-Id: I6b1a0a3eaec10500cd4e73290efad4023bc83da5
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---
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drivers/base/dma-contiguous.c | 4 ++--
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include/linux/dma-contiguous.h | 4 ++--
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2 files changed, 4 insertions(+), 4 deletions(-)
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diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
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index f6e779e..9313bfc1 100644
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--- a/drivers/base/dma-contiguous.c
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+++ b/drivers/base/dma-contiguous.c
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@@ -589,7 +589,7 @@ static void clear_cma_bitmap(struct cma *cma, unsigned long pfn, int count)
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* global one. Requires architecture specific get_dev_cma_area() helper
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* function.
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*/
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-unsigned long dma_alloc_from_contiguous(struct device *dev, int count,
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+unsigned long dma_alloc_from_contiguous(struct device *dev, size_t count,
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unsigned int align)
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{
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unsigned long mask, pfn = 0, pageno, start = 0;
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@@ -604,7 +604,7 @@ unsigned long dma_alloc_from_contiguous(struct device *dev, int count,
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if (align > CONFIG_CMA_ALIGNMENT)
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align = CONFIG_CMA_ALIGNMENT;
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- pr_debug("%s(cma %p, count %d, align %d)\n", __func__, (void *)cma,
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+ pr_debug("%s(cma %p, count %zu, align %d)\n", __func__, (void *)cma,
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count, align);
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if (!count)
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diff --git a/include/linux/dma-contiguous.h b/include/linux/dma-contiguous.h
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index 9e6fee9..d8d124e 100644
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--- a/include/linux/dma-contiguous.h
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+++ b/include/linux/dma-contiguous.h
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@@ -117,7 +117,7 @@ static inline int dma_declare_contiguous_reserved(struct device *dev,
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return ret;
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}
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-unsigned long dma_alloc_from_contiguous(struct device *dev, int count,
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+unsigned long dma_alloc_from_contiguous(struct device *dev, size_t count,
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unsigned int order);
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bool dma_release_from_contiguous(struct device *dev, unsigned long pfn,
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int count);
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@@ -136,7 +136,7 @@ int dma_declare_contiguous(struct device *dev, phys_addr_t size,
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}
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static inline
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-unsigned long dma_alloc_from_contiguous(struct device *dev, int count,
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+unsigned long dma_alloc_from_contiguous(struct device *dev, size_t count,
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unsigned int order)
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{
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return 0;
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--
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cgit v1.1
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