From: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Date: Fri, 2 Jan 2009 14:11:41 +0000 (+0100)
Subject: Fix gunzip in case of insufficient output buffer
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=107b801cf3fe39612d69d70581ebc3bf5e215554;p=project%2Fbcm63xx%2Fu-boot.git

Fix gunzip in case of insufficient output buffer

U-Boot's gunzip() function does not handle the return code
of zlib's inflate() function correctly. gunzip() is implemented
to uncompress all input data in one run. So the correct return
code for the good case is Z_STREAM_END. In case of insufficient
output buffer memory inflate returns Z_OK. For gunzip() this
is an error.

It also makes sense to me to call inflateEnd() also in case
of an error.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
---

diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index a8f85e93b2..905567293c 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -350,7 +350,7 @@ static int bootm_load_os(image_info_t os, ulong *load_end, int boot_progress)
 		printf ("   Uncompressing %s ... ", type_name);
 		if (gunzip ((void *)load, unc_len,
 					(uchar *)image_start, &image_len) != 0) {
-			puts ("GUNZIP: uncompress or overwrite error "
+			puts ("GUNZIP: uncompress, out-of-mem or overwrite error "
 				"- must RESET board to recover\n");
 			if (boot_progress)
 				show_boot_progress (-6);
diff --git a/lib_generic/gunzip.c b/lib_generic/gunzip.c
index 74f0bf9f3e..5bcf5b7b24 100644
--- a/lib_generic/gunzip.c
+++ b/lib_generic/gunzip.c
@@ -102,8 +102,9 @@ int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp)
 	s.next_out = dst;
 	s.avail_out = dstlen;
 	r = inflate(&s, Z_FINISH);
-	if (r != Z_OK && r != Z_STREAM_END) {
+	if (r != Z_STREAM_END) {
 		printf ("Error: inflate() returned %d\n", r);
+		inflateEnd(&s);
 		return (-1);
 	}
 	*lenp = s.next_out - (unsigned char *) dst;