From 4546a8cb993c13b0fafd0eb7f68973675851f3da Mon Sep 17 00:00:00 2001
From: Dominique Martinet <asmadeus@codewreck.org>
Date: Tue, 2 Nov 2021 19:47:47 +0900
Subject: [PATCH] 9p/net: fix missing error check in p9_check_errors
Git-commit: 27eb4c3144f7a5ebef3c9a261d80cb3e1fa784dc
Patch-mainline: v5.16-rc1
References: stable-5.14.19
commit 27eb4c3144f7a5ebef3c9a261d80cb3e1fa784dc upstream.
Link: https://lkml.kernel.org/r/99338965-d36c-886e-cd0e-1d8fff2b4746@gmail.com
Reported-by: syzbot+06472778c97ed94af66d@syzkaller.appspotmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
net/9p/client.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/9p/client.c b/net/9p/client.c
index b7b958f61faf..8a24ac2ea239 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -539,6 +539,8 @@ static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
kfree(ename);
} else {
err = p9pdu_readf(&req->rc, c->proto_version, "d", &ecode);
+ if (err)
+ goto out_err;
err = -ecode;
p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode);
--
2.26.2