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202033c013
This adds 3 expat patches for n-asb-2022-09 from https://github.com/syphyr/android_external_expat/commits/cm-14.1 and also applies 2 of them to 15.1 Signed-off-by: Tad <tad@spotco.us>
79 lines
3.1 KiB
Diff
79 lines
3.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Harish Mahendrakar <harish.mahendrakar@ittiam.com>
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Date: Wed, 15 Sep 2021 18:40:53 -0700
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Subject: [PATCH] handle cases where order isn't a multiple of dimension
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loop around vorbis_book_decodev_set() didn't support a case where
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info->order wasn't an integer multple of dimension.
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vorbis_book_decodev_set() is now updated to handle the loop inside
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with appropriate checks added.
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Other functions vorbis_book_decode_*() have appropriate checks where
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they are called. So added a comment for those.
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This fix is similar to the one in Xiph tremor project's
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commit 80661a13c93a01f25b8df4e89fecad0eee69ddcc
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Bug: 199065614
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Test: clusterfuzz generated poc in bug
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Test: atest VorbisDecoderTest -- --enable-module-dynamic-download=true
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Test: atest VtsHalMediaC2V1_0TargetAudioDecTest
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Test: atest CtsMediaV2TestCases -- --module-arg CtsMediaV2TestCases:\
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instrumentation-arg:codec-prefix:=c2.android.vorbis.decoder
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Change-Id: Ibb94e7fc361e843caad7f7620229377dc1f8dd73
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(cherry picked from commit 42aa2b936a078e2f69725e95009affcc93cb0f98)
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---
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Tremolo/codebook.c | 5 +++++
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Tremolo/floor0.c | 5 ++---
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2 files changed, 7 insertions(+), 3 deletions(-)
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diff --git a/Tremolo/codebook.c b/Tremolo/codebook.c
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index a06302d..de6f3cb 100644
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--- a/Tremolo/codebook.c
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+++ b/Tremolo/codebook.c
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@@ -838,6 +838,7 @@ static int decode_map(codebook *s, oggpack_buffer *b, ogg_int32_t *v, int point)
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#endif
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/* returns 0 on OK or -1 on eof *************************************/
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+/* decode vector / dim granularity gaurding is done in the upper layer */
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long vorbis_book_decodevs_add(codebook *book,ogg_int32_t *a,
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oggpack_buffer *b,int n,int point){
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if(book->used_entries>0){
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@@ -855,6 +856,7 @@ long vorbis_book_decodevs_add(codebook *book,ogg_int32_t *a,
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return 0;
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}
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+/* decode vector / dim granularity gaurding is done in the upper layer */
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long vorbis_book_decodev_add(codebook *book,ogg_int32_t *a,
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oggpack_buffer *b,int n,int point){
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if(book->used_entries>0){
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@@ -871,6 +873,9 @@ long vorbis_book_decodev_add(codebook *book,ogg_int32_t *a,
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return 0;
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}
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+/* unlike the others, we guard against n not being an integer number
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+ of <dim> internally rather than in the upper layer (called only by
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+ floor0) */
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long vorbis_book_decodev_set(codebook *book,ogg_int32_t *a,
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oggpack_buffer *b,int n,int point){
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if(book->used_entries>0){
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diff --git a/Tremolo/floor0.c b/Tremolo/floor0.c
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index b6ece29..812c720 100644
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--- a/Tremolo/floor0.c
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+++ b/Tremolo/floor0.c
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@@ -419,10 +419,9 @@ ogg_int32_t *floor0_inverse1(vorbis_dsp_state *vd,vorbis_info_floor *i,
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}
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ogg_int32_t last=0;
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- for(j=0;j<info->order;j+=b->dim)
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- if(vorbis_book_decodev_set(b,lsp+j,&vd->opb,b->dim,-24)==-1)goto eop;
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+ if(vorbis_book_decodev_set(b,lsp,&vd->opb,info->order,-24)==-1)goto eop;
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for(j=0;j<info->order;){
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- for(k=0;k<b->dim;k++,j++)lsp[j]+=last;
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+ for(k=0;k<b->dim && j<info->order;k++,j++)lsp[j]+=last;
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last=lsp[j-1];
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}
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