linux-kernel - [PATCH 002 of 18] knfsd: svcrpc: fix gss krb5i memory leak

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Date:	Fri, 8 Dec 2006 12:13:31 +1100
From:	NeilBrown <neilb@...e.de>
To:	Andrew Morton <akpm@...l.org>
Cc:	nfs@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [PATCH 002 of 18] knfsd: svcrpc: fix gss krb5i memory leak


From: J.Bruce Fields <bfields@...ldses.org>

The memory leak here is embarassingly obvious.

This fixes a problem that causes the kernel to leak a small amount of
memory every time it receives a integrity-protected request.

Thanks to Aimé Le Rouzic for the bug report.

Signed-off-by: J. Bruce Fields <bfields@...i.umich.edu>
Signed-off-by: Neil Brown <neilb@...e.de>

### Diffstat output
 ./net/sunrpc/auth_gss/svcauth_gss.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff .prev/net/sunrpc/auth_gss/svcauth_gss.c ./net/sunrpc/auth_gss/svcauth_gss.c
--- .prev/net/sunrpc/auth_gss/svcauth_gss.c	2006-12-08 12:07:28.000000000 +1100
+++ ./net/sunrpc/auth_gss/svcauth_gss.c	2006-12-08 12:08:05.000000000 +1100
@@ -818,19 +818,19 @@ unwrap_integ_data(struct xdr_buf *buf, u
 
 	integ_len = svc_getnl(&buf->head[0]);
 	if (integ_len & 3)
-		goto out;
+		return stat;
 	if (integ_len > buf->len)
-		goto out;
+		return stat;
 	if (xdr_buf_subsegment(buf, &integ_buf, 0, integ_len))
 		BUG();
 	/* copy out mic... */
 	if (read_u32_from_xdr_buf(buf, integ_len, &mic.len))
 		BUG();
 	if (mic.len > RPC_MAX_AUTH_SIZE)
-		goto out;
+		return stat;
 	mic.data = kmalloc(mic.len, GFP_KERNEL);
 	if (!mic.data)
-		goto out;
+		return stat;
 	if (read_bytes_from_xdr_buf(buf, integ_len + 4, mic.data, mic.len))
 		goto out;
 	maj_stat = gss_verify_mic(ctx, &integ_buf, &mic);
@@ -840,6 +840,7 @@ unwrap_integ_data(struct xdr_buf *buf, u
 		goto out;
 	stat = 0;
 out:
+	kfree(mic.data);
 	return stat;
 }
 
-
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