From: Helmut Grohne <helmut@subdivi.de>
Date: Sat, 11 Nov 2023 18:18:40 +0100
Subject: formats: reject implausible rate

Bug: https://sourceforge.net/p/sox/bugs/360/
Bug-Debian: https://bugs.debian.org/1012516
---
 src/formats_i.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/formats_i.c b/src/formats_i.c
index 602e044..63f8797 100644
--- a/src/formats_i.c
+++ b/src/formats_i.c
@@ -70,9 +70,15 @@ int lsx_check_read_params(sox_format_t * ft, unsigned channels,
     ft->signal.channels = channels;
   }
 
-  if (rate && ft->signal.rate && ft->signal.rate != rate)
+  if (rate && ft->signal.rate && ft->signal.rate != rate) {
     lsx_warn("`%s': overriding sample rate", ft->filename);
-  else ft->signal.rate = rate;
+  /* Since NaN comparisons yield false, the negation rejects them. */
+  } else if (!(rate > 0)) {
+    lsx_fail_errno(ft, EINVAL, "invalid rate value");
+    return SOX_EOF;
+  } else {
+    ft->signal.rate = rate;
+  }
 
   if (encoding && ft->encoding.encoding && ft->encoding.encoding != encoding)
     lsx_warn("`%s': overriding encoding type", ft->filename);
