commit 596d7910595d314ed2d67ffaceba73ec9c0e7184
author Yash Patil <yash.patil@ittiam.com> Fri Sep 15 19:10:00 2023 +0530
committer sandeshvenkatesh <89826624+sandeshvenkatesh@users.noreply.github.com> Fri Sep 15 19:17:37 2023 +0530
tree 7bff0f0bf793183fbe43b4bbdd4715f5f95c55b1
parent c07f14410b8246fbba9dd12d31c42cf924219331

Fix for Divide-by-zero in ixheaacd_lpc_to_td

This changes handle the Divide-by-zero runtime error
reported while calculating the gain because
imaginary and real data were zero.

Bug: ossFuzz:61788
Test: poc in bug

decoder/ixheaacd_tcx_fwd_mdct.c

diff --git a/decoder/ixheaacd_tcx_fwd_mdct.c b/decoder/ixheaacd_tcx_fwd_mdct.c
index 267af0d..3fd55e8 100644
--- a/decoder/ixheaacd_tcx_fwd_mdct.c
+++ b/decoder/ixheaacd_tcx_fwd_mdct.c
@@ -165,7 +165,7 @@
 
   for (i = 0; i < size_n / 2; i++) {
     gains[i] =
-        (FLOAT32)(1.0f / sqrt(data_r[i] * data_r[i] + data_i[i] * data_i[i]));
+        (FLOAT32)(1.0f / (sqrt(data_r[i] * data_r[i] + data_i[i] * data_i[i]) + FLT_EPSILON));
   }
 
   return;