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While in practice the ibuf_skip() call can not fail it is better to check

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it. If the ibuf header can't be skipped it is better to not forward the
message and return an error.
Fix for CID 492354
OK tb@
This commit is contained in:
claudio
2026-03-02 20:07:58 +00:00
parent ab4874c493
commit a3e28f440d
1 changed files with 3 additions and 2 deletions
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5
lib/libutil/imsg.c
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@@ -1,4 +1,4 @@
/* $OpenBSD: imsg.c,v 1.42 2025/06/16 13:56:11 claudio Exp $ */
/* $OpenBSD: imsg.c,v 1.43 2026/03/02 20:07:58 claudio Exp $ */
/*
* Copyright (c) 2023 Claudio Jeker <claudio@openbsd.org>
@@ -340,7 +340,8 @@ imsg_forward(struct imsgbuf *imsgbuf, struct imsg *msg)
size_t len;
ibuf_rewind(msg->buf);
ibuf_skip(msg->buf, sizeof(msg->hdr));
if (ibuf_skip(msg->buf, sizeof(msg->hdr)) == -1)
return (-1);
len = ibuf_size(msg->buf);
if ((wbuf = imsg_create(imsgbuf, msg->hdr.type, msg->hdr.peerid,