From: Andre Noll <maan@systemlinux.org>
Date: Sat, 28 Mar 2009 18:13:23 +0000 (+0100)
Subject: fecdec: Return an error on zero size slices.
X-Git-Tag: v0.3.4~20
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=f97bcd9d55344c8f1232470eac01974cd53a9d7f

fecdec: Return an error on zero size slices.
---

diff --git a/error.h b/error.h
index 7de3f436..94a41202 100644
--- a/error.h
+++ b/error.h
@@ -49,7 +49,7 @@ extern const char **para_errlist[];
 
 #define FECDEC_FILTER_ERRORS \
 	PARA_ERROR(BAD_FEC_HEADER, "invalid fec header"), \
-	PARA_ERROR(BAD_SLICE_SIZE, "slice size too large"), \
+	PARA_ERROR(BAD_SLICE_SIZE, "slice size zero or too large"), \
 	PARA_ERROR(BAD_SLICE_NUM, "invalid slice number"), \
 	PARA_ERROR(FECDEC_OVERRUN, "fecdec output buffer overrun"), \
 	PARA_ERROR(FECDEC_EOF, "received eof packet"), \
diff --git a/fecdec_filter.c b/fecdec_filter.c
index 794add49..a7d1875c 100644
--- a/fecdec_filter.c
+++ b/fecdec_filter.c
@@ -358,7 +358,7 @@ static ssize_t fecdec(char *buf, size_t len, struct filter_node *fn)
 	ret = read_fec_header(buf, len, &h);
 	if (ret <= 0)
 		return ret;
-	if (h.slice_bytes > fn->bufsize)
+	if (!h.slice_bytes || h.slice_bytes > fn->bufsize)
 		return -E_BAD_SLICE_SIZE;
 	if (h.slice_num > h.slices_per_group)
 		return -E_BAD_SLICE_NUM;