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From d0dc59e27263c6b53435d770010dcc6f397d58ee Mon Sep 17 00:00:00 2001
From: Frank Sorenson <sorenson@redhat.com>
Date: Mon, 17 Jan 2022 13:33:13 -0500
Subject: [PATCH] libtirpc: Fix use-after-free accessing the error number
Free the cbuf after obtaining the error number.
Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
---
src/clnt_dg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/clnt_dg.c b/src/clnt_dg.c
index e1255de..b3d82e7 100644
--- a/src/clnt_dg.c
+++ b/src/clnt_dg.c
@@ -456,9 +456,9 @@ get_reply:
cmsg = CMSG_NXTHDR (&msg, cmsg))
if (cmsg->cmsg_level == SOL_IP && cmsg->cmsg_type == IP_RECVERR)
{
- mem_free(cbuf, (outlen + 256));
e = (struct sock_extended_err *) CMSG_DATA(cmsg);
cu->cu_error.re_errno = e->ee_errno;
+ mem_free(cbuf, (outlen + 256));
release_fd_lock(cu->cu_fd_lock, mask);
return (cu->cu_error.re_status = RPC_CANTRECV);
}
--
1.8.3.1
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