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48 lines
1.4 KiB
Diff
48 lines
1.4 KiB
Diff
From 077614c9f2b9f9d062fed66e3ae7669937ea6b85 Mon Sep 17 00:00:00 2001
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From: Xiaojun Sang <xsang@codeaurora.org>
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Date: Fri, 04 Nov 2016 14:35:58 +0800
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Subject: [PATCH] ASoC: soc: qdsp6: prevent risk of buffer overflow
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In case of large value for 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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Backport reference:
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* Change-Id: I9556f18dd6a9fdf3f76c133ae75c04ecce171f08
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* CRs-Fixed: 1084210
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Change-Id: I93f820e0344bfa05dee6a3e83d84ef688e23f761
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Signed-off-by: Xiaojun Sang <xsang@codeaurora.org>
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Signed-off-by: Adrian DC <radian.dc@gmail.com>
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---
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diff --git a/sound/soc/msm/qdsp6/q6asm.c b/sound/soc/msm/qdsp6/q6asm.c
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index 2cde92a..c3bcdcd 100644
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--- a/sound/soc/msm/qdsp6/q6asm.c
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+++ b/sound/soc/msm/qdsp6/q6asm.c
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@@ -2893,7 +2893,7 @@
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void *payload = 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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if (!ac || ac->apr == NULL || this_mmap.apr == NULL) {
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pr_err("APR handle NULL\n");
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@@ -2901,6 +2901,14 @@
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}
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pr_debug("%s: Session[%d]\n", __func__, ac->session);
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+ if (bufcnt > (UINT_MAX
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+ - sizeof(struct asm_stream_cmd_memory_map_regions))
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+ / sizeof(struct asm_memory_map_regions)) {
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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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cmd_size = sizeof(struct asm_stream_cmd_memory_map_regions)
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+ sizeof(struct asm_memory_map_regions) * bufcnt;
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