From: Chuck Lever <chuck.lever@oracle.com>
Date: Sun, 15 Jan 2023 17:20:48 +0000 (-0500)
Subject: SUNRPC: Obscure Kerberos session key
X-Git-Tag: v6.3-rc1~38^2~57
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=01c4e326327a635e1fac75b1aedd2c2c1e8123b5;p=linux-2.6-block.git

SUNRPC: Obscure Kerberos session key

ctx->Ksess is never used after import has completed. Obscure it
immediately so it cannot be re-used or copied.

Tested-by: Scott Mayhew <smayhew@redhat.com>
Reviewed-by: Simo Sorce <simo@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---

diff --git a/net/sunrpc/auth_gss/gss_krb5_mech.c b/net/sunrpc/auth_gss/gss_krb5_mech.c
index 76a0d83fe500..b982c9d495f2 100644
--- a/net/sunrpc/auth_gss/gss_krb5_mech.c
+++ b/net/sunrpc/auth_gss/gss_krb5_mech.c
@@ -550,6 +550,7 @@ gss_import_sec_context_kerberos(const void *p, size_t len,
 		ret = gss_import_v1_context(p, end, ctx);
 	else
 		ret = gss_import_v2_context(p, end, ctx, gfp_mask);
+	memzero_explicit(&ctx->Ksess, sizeof(ctx->Ksess));
 	if (ret) {
 		kfree(ctx);
 		return ret;