From 126137a53d7e9cc1614f0ec7347af1630b7fbcac Mon Sep 17 00:00:00 2001
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Date: Mon, 14 Feb 2022 17:59:38 -0800
Subject: [PATCH] Bluetooth: Fix bt_skb_sendmmsg not allocating partial chunks
commit 29fb608396d6a62c1b85acc421ad7a4399085b9f upstream.
Since bt_skb_sendmmsg can be used with the likes of SOCK_STREAM it
shall return the partial chunks it could allocate instead of freeing
everything as otherwise it can cause problems like bellow.
Fixes: 81be03e026dc ("Bluetooth: RFCOMM: Replace use of memcpy_from_msg with bt_skb_sendmmsg")
Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Link: https://lore.kernel.org/r/d7206e12-1b99-c3be-84f4-df22af427ef5@molgen.mpg.de
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=215594
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Tested-by: Paul Menzel <pmenzel@molgen.mpg.de> (Nokia N9 (MeeGo/Harmattan)
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/net/bluetooth/bluetooth.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index d27f34ea3084b..421d41ef4e9ca 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -423,8 +423,7 @@ static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk,
tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
if (IS_ERR(tmp)) {
- kfree_skb(skb);
- return tmp;
+ return skb;
}
len -= tmp->len;