LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Pavel Skripkin <paskripkin@gmail.com>
To: paul@paul-moore.com, davem@davemloft.net,
yoshfuji@linux-ipv6.org, dsahern@kernel.org, kuba@kernel.org
Cc: netdev@vger.kernel.org, linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org,
Pavel Skripkin <paskripkin@gmail.com>,
syzbot+cdd51ee2e6b0b2e18c0d@syzkaller.appspotmail.com
Subject: [PATCH 1/2] net: cipso: fix warnings in netlbl_cipsov4_add_std
Date: Sat, 10 Jul 2021 10:03:13 +0300 [thread overview]
Message-ID: <53de0ccd1aa3fffa6bce2a2ae7a5ca07e0af6d3a.1625900431.git.paskripkin@gmail.com> (raw)
In-Reply-To: <cover.1625900431.git.paskripkin@gmail.com>
Syzbot reported warning in netlbl_cipsov4_add(). The
problem was in too big doi_def->map.std->lvl.local_size
passed to kcalloc(). Since this value comes from userpace there is
no need to warn if value is not correct.
The same problem may occur with other kcalloc() calls in
this function, so, I've added __GFP_NOWARN flag to all
kcalloc() calls there.
Reported-and-tested-by: syzbot+cdd51ee2e6b0b2e18c0d@syzkaller.appspotmail.com
Fixes: 96cb8e3313c7 ("[NetLabel]: CIPSOv4 and Unlabeled packet integration")
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
---
net/netlabel/netlabel_cipso_v4.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c
index 4f50a64315cf..50f40943c815 100644
--- a/net/netlabel/netlabel_cipso_v4.c
+++ b/net/netlabel/netlabel_cipso_v4.c
@@ -187,14 +187,14 @@ static int netlbl_cipsov4_add_std(struct genl_info *info,
}
doi_def->map.std->lvl.local = kcalloc(doi_def->map.std->lvl.local_size,
sizeof(u32),
- GFP_KERNEL);
+ GFP_KERNEL | __GFP_NOWARN);
if (doi_def->map.std->lvl.local == NULL) {
ret_val = -ENOMEM;
goto add_std_failure;
}
doi_def->map.std->lvl.cipso = kcalloc(doi_def->map.std->lvl.cipso_size,
sizeof(u32),
- GFP_KERNEL);
+ GFP_KERNEL | __GFP_NOWARN);
if (doi_def->map.std->lvl.cipso == NULL) {
ret_val = -ENOMEM;
goto add_std_failure;
@@ -263,7 +263,7 @@ static int netlbl_cipsov4_add_std(struct genl_info *info,
doi_def->map.std->cat.local = kcalloc(
doi_def->map.std->cat.local_size,
sizeof(u32),
- GFP_KERNEL);
+ GFP_KERNEL | __GFP_NOWARN);
if (doi_def->map.std->cat.local == NULL) {
ret_val = -ENOMEM;
goto add_std_failure;
@@ -271,7 +271,7 @@ static int netlbl_cipsov4_add_std(struct genl_info *info,
doi_def->map.std->cat.cipso = kcalloc(
doi_def->map.std->cat.cipso_size,
sizeof(u32),
- GFP_KERNEL);
+ GFP_KERNEL | __GFP_NOWARN);
if (doi_def->map.std->cat.cipso == NULL) {
ret_val = -ENOMEM;
goto add_std_failure;
--
2.32.0
next prev parent reply other threads:[~2021-07-10 7:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-10 7:03 [PATCH 0/2] net: cipso: bug fixes Pavel Skripkin
2021-07-10 7:03 ` Pavel Skripkin [this message]
2021-07-12 15:03 ` [PATCH 1/2] net: cipso: fix warnings in netlbl_cipsov4_add_std Paul Moore
2021-07-26 11:11 ` Pavel Skripkin
2021-07-27 2:40 ` Paul Moore
2021-07-10 7:03 ` [PATCH 2/2] net: cipso: fix memory leak in cipso_v4_doi_free Pavel Skripkin
2021-07-10 7:29 ` Dongliang Mu
2021-07-10 7:40 ` Pavel Skripkin
2021-07-10 7:42 ` Dongliang Mu
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=53de0ccd1aa3fffa6bce2a2ae7a5ca07e0af6d3a.1625900431.git.paskripkin@gmail.com \
--to=paskripkin@gmail.com \
--cc=davem@davemloft.net \
--cc=dsahern@kernel.org \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=paul@paul-moore.com \
--cc=syzbot+cdd51ee2e6b0b2e18c0d@syzkaller.appspotmail.com \
--cc=yoshfuji@linux-ipv6.org \
--subject='Re: [PATCH 1/2] net: cipso: fix warnings in netlbl_cipsov4_add_std' \
/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
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).