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https://github.com/Divested-Mobile/DivestOS-Build.git
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69 lines
2.4 KiB
Diff
69 lines
2.4 KiB
Diff
From 6f6ce85df80c31048863cd31349e86277d89ff36 Mon Sep 17 00:00:00 2001
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From: Biswajit Paul <biswajitpaul@codeaurora.org>
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Date: Tue, 13 Dec 2016 15:27:30 -0800
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Subject: [PATCH] msm: ADSPRPC: Buffer length to be copied is truncated
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The buffer length that is being used to allocate gets truncated
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due to it being assigned to wrong type causing a much smaller
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buffer to be allocated than what is required for copying.
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Bug: 31695439
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CRs-Fixed: 1100695
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Change-Id: I30818acd42bd282837c7c7aa16d56d3b95d4dfe7
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Signed-off-by: Sathish Ambley <sathishambley@codeaurora.org>
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Signed-off-by: Biswajit Paul <biswajitpaul@codeaurora.org>
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---
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drivers/char/adsprpc.c | 18 ++++++++++++++----
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1 file changed, 14 insertions(+), 4 deletions(-)
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diff --git a/drivers/char/adsprpc.c b/drivers/char/adsprpc.c
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index a9c537b543122..f99855c0cacf5 100644
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--- a/drivers/char/adsprpc.c
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+++ b/drivers/char/adsprpc.c
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@@ -833,9 +833,9 @@ static int get_args(uint32_t kernel, struct smq_invoke_ctx *ctx,
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void *args;
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remote_arg_t *pra = ctx->pra;
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remote_arg_t *rpra = ctx->rpra;
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- ssize_t rlen, used, size;
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+ ssize_t rlen, used, size, copylen = 0;
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uint32_t sc = ctx->sc, start;
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- int i, inh, bufs = 0, err = 0, oix, copylen = 0;
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+ int i, inh, bufs = 0, err = 0, oix;
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int inbufs = REMOTE_SCALARS_INBUFS(sc);
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int outbufs = REMOTE_SCALARS_OUTBUFS(sc);
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int cid = ctx->fdata->cid;
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@@ -884,13 +884,23 @@ static int get_args(uint32_t kernel, struct smq_invoke_ctx *ctx,
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/* calculate len requreed for copying */
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for (oix = 0; oix < inbufs + outbufs; ++oix) {
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int i = ctx->overps[oix]->raix;
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+ uintptr_t mstart, mend;
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+
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if (!pra[i].buf.len)
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continue;
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if (list[i].num)
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continue;
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if (ctx->overps[oix]->offset == 0)
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copylen = ALIGN(copylen, BALIGN);
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- copylen += ctx->overps[oix]->mend - ctx->overps[oix]->mstart;
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+ mstart = ctx->overps[oix]->mstart;
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+ mend = ctx->overps[oix]->mend;
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+ VERIFY(err, (mend - mstart) <= LONG_MAX);
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+ if (err)
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+ goto bail;
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+ copylen += mend - mstart;
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+ VERIFY(err, copylen >= 0);
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+ if (err)
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+ goto bail;
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}
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/* alocate new buffer */
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@@ -916,7 +926,7 @@ static int get_args(uint32_t kernel, struct smq_invoke_ctx *ctx,
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/* copy non ion buffers */
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for (oix = 0; oix < inbufs + outbufs; ++oix) {
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int i = ctx->overps[oix]->raix;
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- int mlen = ctx->overps[oix]->mend - ctx->overps[oix]->mstart;
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+ ssize_t mlen = ctx->overps[oix]->mend - ctx->overps[oix]->mstart;
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if (!pra[i].buf.len)
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continue;
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if (list[i].num)
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