linux-kernel - [PATCH] 9p: fix put

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:	Tue, 23 Sep 2008 16:50:45 -0500
From:	"Eric Van Hensbergen" <ericvh@...il.com>
To:	"Abhishek Kulkarni" <kulkarni@...l.gov>
Cc:	v9fs-developer@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [PATCH] 9p: fix put_data error handling

Abhishek Kulkarni pointed out an inconsistency in the way
errors are returned from p9_put_data.  On deeper exploration it
seems the error handling for this path was completely wrong.
This patch adds checks for allocation problems and propagates
errors correctly.

Signed-off-by: Eric Van Hensbergen <ericvh@...il.com>
---
 net/9p/conv.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/net/9p/conv.c b/net/9p/conv.c
index 4454720..5ad3a3b 100644
--- a/net/9p/conv.c
+++ b/net/9p/conv.c
@@ -451,8 +451,10 @@ p9_put_data(struct cbuf *bufp, const char *data, int count,
                   unsigned char **pdata)
 {
        *pdata = buf_alloc(bufp, count);
+       if (*pdata == NULL)
+               return -ENOMEM;
        memmove(*pdata, data, count);
-       return count;
+       return 0;
 }

 static int
@@ -460,6 +462,8 @@ p9_put_user_data(struct cbuf *bufp, const char
__user *data, int count,
                   unsigned char **pdata)
 {
        *pdata = buf_alloc(bufp, count);
+       if (*pdata == NULL)
+               return -ENOMEM;
        return copy_from_user(*pdata, data, count);
 }

--
1.5.4.3
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/