mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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60 lines
1.8 KiB
Diff
60 lines
1.8 KiB
Diff
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From 1aa5df9246557a98181f03e98530ffd509b954c8 Mon Sep 17 00:00:00 2001
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From: Xiaojun Sang <xsang@codeaurora.org>
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Date: Fri, 4 Nov 2016 14:35:58 +0800
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Subject: ASoC: soc: prevent risk of buffer overflow
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In case of large value for bufcnt_t or bufcnt,
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cmd_size may overflow. Buffer size allocated by cmd_size might
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be not as expected.
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Possible buffer overflow could happen.
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CRs-Fixed: 1084210
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Change-Id: I9556f18dd6a9fdf3f76c133ae75c04ecce171f08
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Signed-off-by: Xiaojun Sang <xsang@codeaurora.org>
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---
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sound/soc/msm/qdsp6v2/q6asm.c | 17 ++++++++++++++++-
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1 file changed, 16 insertions(+), 1 deletion(-)
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diff --git a/sound/soc/msm/qdsp6v2/q6asm.c b/sound/soc/msm/qdsp6v2/q6asm.c
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index 0ea94cb..fe34f92f 100644
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--- a/sound/soc/msm/qdsp6v2/q6asm.c
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+++ b/sound/soc/msm/qdsp6v2/q6asm.c
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@@ -5846,7 +5846,7 @@ static int q6asm_memory_map_regions(struct audio_client *ac, int dir,
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struct asm_buffer_node *buffer_node = NULL;
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int rc = 0;
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int i = 0;
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- int cmd_size = 0;
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+ uint32_t cmd_size = 0;
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uint32_t bufcnt_t;
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uint32_t bufsz_t;
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@@ -5868,10 +5868,25 @@ static int q6asm_memory_map_regions(struct audio_client *ac, int dir,
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bufsz_t = PAGE_ALIGN(bufsz_t);
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}
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+ if (bufcnt_t > (UINT_MAX
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+ - sizeof(struct avs_cmd_shared_mem_map_regions))
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+ / sizeof(struct avs_shared_map_region_payload)) {
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+ pr_err("%s: Unsigned Integer Overflow. bufcnt_t = %u\n",
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+ __func__, bufcnt_t);
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+ return -EINVAL;
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+ }
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+
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cmd_size = sizeof(struct avs_cmd_shared_mem_map_regions)
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+ (sizeof(struct avs_shared_map_region_payload)
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* bufcnt_t);
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+
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+ if (bufcnt > (UINT_MAX / sizeof(struct asm_buffer_node))) {
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+ pr_err("%s: Unsigned Integer Overflow. bufcnt = %u\n",
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+ __func__, bufcnt);
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+ return -EINVAL;
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+ }
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+
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buffer_node = kzalloc(sizeof(struct asm_buffer_node) * bufcnt,
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GFP_KERNEL);
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if (!buffer_node) {
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--
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cgit v1.1
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