From: Seung-Woo Kim <sw0312.kim@samsung.com>
To: linux-modules@vger.kernel.org, lucas.de.marchi@gmail.com
Cc: gladkov.alexey@gmail.com, sw0312.kim@samsung.com, sungguk.na@samsung.com
Subject: [PATCH 2/2] libkmod: fix possible double free with wrong modules.builtin.modinfo
Date: Tue, 13 Apr 2021 20:23:15 +0900 [thread overview]
Message-ID: <20210413112315.18907-3-sw0312.kim@samsung.com> (raw)
In-Reply-To: <20210413112315.18907-1-sw0312.kim@samsung.com>
Fix double free for *modinfo with non '\0' terminated wrong
modules.builtin.modinfo, which is because EOF is minus value.
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
---
libkmod/libkmod-builtin.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libkmod/libkmod-builtin.c b/libkmod/libkmod-builtin.c
index a75a542f6942..a002cb5ee2c6 100644
--- a/libkmod/libkmod-builtin.c
+++ b/libkmod/libkmod-builtin.c
@@ -313,7 +313,7 @@ ssize_t kmod_builtin_get_modinfo(struct kmod_ctx *ctx, const char *modname,
while (offset < iter->next) {
offset = get_string(iter, pos, &line, &linesz);
if (offset <= 0) {
- count = (offset) ? -errno : -EOF;
+ count = (offset) ? -errno : -EINVAL;
free(*modinfo);
goto fail;
}
--
2.19.2
next prev parent reply other threads:[~2021-04-13 11:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20210413112018epcas1p15c2cb9693086133c145845030df145ef@epcas1p1.samsung.com>
2021-04-13 11:23 ` [PATCH 0/2] harden libkmod-builtin with wrong modules.builtin.modinfo Seung-Woo Kim
[not found] ` <CGME20210413112018epcas1p4e7e6b23060a83694867b07a1f1afc200@epcas1p4.samsung.com>
2021-04-13 11:23 ` [PATCH 1/2] libkmod: fix an overflow " Seung-Woo Kim
[not found] ` <CGME20210413112019epcas1p22c64b861d296333a64c348020c7ca20e@epcas1p2.samsung.com>
2021-04-13 11:23 ` Seung-Woo Kim [this message]
2021-04-17 20:58 ` [PATCH 0/2] harden libkmod-builtin " Lucas De Marchi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210413112315.18907-3-sw0312.kim@samsung.com \
--to=sw0312.kim@samsung.com \
--cc=gladkov.alexey@gmail.com \
--cc=linux-modules@vger.kernel.org \
--cc=lucas.de.marchi@gmail.com \
--cc=sungguk.na@samsung.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).