mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-18 10:13:57 +08:00
0f1a24c9a9
Sending malformed llc packets triggers this spew, which seems excessive.
WARNING: CPU: 1 PID: 6917 at net/llc/llc_output.c:46 llc_mac_hdr_init+0x85/0x90 [llc]()
device type not supported: 0
CPU: 1 PID: 6917 Comm: trinity-c1 Not tainted 3.13.0+ #95
0000000000000009 00000000007e257d ffff88009232fbe8 ffffffffac737325
ffff88009232fc30 ffff88009232fc20 ffffffffac06d28d ffff88020e07f180
ffff88009232fec0 00000000000000c8 0000000000000000 ffff88009232fe70
Call Trace:
[<ffffffffac737325>] dump_stack+0x4e/0x7a
[<ffffffffac06d28d>] warn_slowpath_common+0x7d/0xa0
[<ffffffffac06d30c>] warn_slowpath_fmt+0x5c/0x80
[<ffffffffc01736d5>] llc_mac_hdr_init+0x85/0x90 [llc]
[<ffffffffc0173759>] llc_build_and_send_ui_pkt+0x79/0x90 [llc]
[<ffffffffc057cdba>] llc_ui_sendmsg+0x23a/0x400 [llc2]
[<ffffffffac605d8c>] sock_sendmsg+0x9c/0xe0
[<ffffffffac185a37>] ? might_fault+0x47/0x50
[<ffffffffac606321>] SYSC_sendto+0x121/0x1c0
[<ffffffffac011847>] ? syscall_trace_enter+0x207/0x270
[<ffffffffac6071ce>] SyS_sendto+0xe/0x10
[<ffffffffac74aaa4>] tracesys+0xdd/0xe2
Until 2009, this was a printk, when it was changed in
bf9ae5386b: "llc: use dev_hard_header".
Let userland figure out what -EINVAL means by itself.
Signed-off-by: Dave Jones <davej@fedoraproject.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/*
|
|
* llc_output.c - LLC minimal output path
|
|
*
|
|
* Copyright (c) 1997 by Procom Technology, Inc.
|
|
* 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
|
|
*
|
|
* This program can be redistributed or modified under the terms of the
|
|
* GNU General Public License version 2 as published by the Free Software
|
|
* Foundation.
|
|
* This program is distributed without any warranty or implied warranty
|
|
* of merchantability or fitness for a particular purpose.
|
|
*
|
|
* See the GNU General Public License version 2 for more details.
|
|
*/
|
|
|
|
#include <linux/if_arp.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/export.h>
|
|
#include <net/llc.h>
|
|
#include <net/llc_pdu.h>
|
|
|
|
/**
|
|
* llc_mac_hdr_init - fills MAC header fields
|
|
* @skb: Address of the frame to initialize its MAC header
|
|
* @sa: The MAC source address
|
|
* @da: The MAC destination address
|
|
*
|
|
* Fills MAC header fields, depending on MAC type. Returns 0, If MAC type
|
|
* is a valid type and initialization completes correctly 1, otherwise.
|
|
*/
|
|
int llc_mac_hdr_init(struct sk_buff *skb,
|
|
const unsigned char *sa, const unsigned char *da)
|
|
{
|
|
int rc = -EINVAL;
|
|
|
|
switch (skb->dev->type) {
|
|
case ARPHRD_ETHER:
|
|
case ARPHRD_LOOPBACK:
|
|
rc = dev_hard_header(skb, skb->dev, ETH_P_802_2, da, sa,
|
|
skb->len);
|
|
if (rc > 0)
|
|
rc = 0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* llc_build_and_send_ui_pkt - unitdata request interface for upper layers
|
|
* @sap: sap to use
|
|
* @skb: packet to send
|
|
* @dmac: destination mac address
|
|
* @dsap: destination sap
|
|
*
|
|
* Upper layers calls this function when upper layer wants to send data
|
|
* using connection-less mode communication (UI pdu).
|
|
*
|
|
* Accept data frame from network layer to be sent using connection-
|
|
* less mode communication; timeout/retries handled by network layer;
|
|
* package primitive as an event and send to SAP event handler
|
|
*/
|
|
int llc_build_and_send_ui_pkt(struct llc_sap *sap, struct sk_buff *skb,
|
|
unsigned char *dmac, unsigned char dsap)
|
|
{
|
|
int rc;
|
|
llc_pdu_header_init(skb, LLC_PDU_TYPE_U, sap->laddr.lsap,
|
|
dsap, LLC_PDU_CMD);
|
|
llc_pdu_init_as_ui_cmd(skb);
|
|
rc = llc_mac_hdr_init(skb, skb->dev->dev_addr, dmac);
|
|
if (likely(!rc))
|
|
rc = dev_queue_xmit(skb);
|
|
return rc;
|
|
}
|
|
|
|
EXPORT_SYMBOL(llc_mac_hdr_init);
|
|
EXPORT_SYMBOL(llc_build_and_send_ui_pkt);
|