34 lines
1.1 KiB
Diff
34 lines
1.1 KiB
Diff
From c7d5a60d3df735a3816bbc1ff1b416a803a4f7a6 Mon Sep 17 00:00:00 2001
|
|
From: Dave Reisner <dreisner@archlinux.org>
|
|
Date: Mon, 7 May 2012 19:41:41 -0400
|
|
Subject: [PATCH 1/2] libkmod-file: gracefully handle errors from zlib
|
|
|
|
zlib won't necessarily set the system errno, and this is particularly
|
|
evident on corrupted data (which results in a double free). Use zlib's
|
|
gzerror to detect the failure, returning a generic EINVAL when zlib
|
|
doesn't provide us with an errno.
|
|
---
|
|
libkmod/libkmod-file.c | 8 +++++++-
|
|
1 file changed, 7 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/libkmod/libkmod-file.c b/libkmod/libkmod-file.c
|
|
index 46ad8d9..8beb7e3 100644
|
|
--- libkmod/libkmod-file.c
|
|
+++ libkmod/libkmod-file.c
|
|
@@ -199,7 +199,13 @@ static int load_zlib(struct kmod_file *file)
|
|
if (r == 0)
|
|
break;
|
|
else if (r < 0) {
|
|
- err = -errno;
|
|
+ int gzerr;
|
|
+ const char *gz_errmsg = gzerror(file->gzf, &gzerr);
|
|
+
|
|
+ ERR(file->ctx, "gzip: %s\n", gz_errmsg);
|
|
+
|
|
+ /* gzip might not set errno here */
|
|
+ err = gzerr == Z_ERRNO ? -errno : -EINVAL;
|
|
goto error;
|
|
}
|
|
did += r;
|
|
--
|
|
1.7.10.1
|