From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: [linux-next:master 10650/11475] drivers/net/can/janz-ican3.c:1303 ican3_get_echo_skb() error: uninitialized symbol 'dlc'.
Date: Sun, 09 Jan 2022 01:42:38 +0800 [thread overview]
Message-ID: <202201090148.AauXMQpd-lkp@intel.com> (raw)
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CC: kbuild-all(a)lists.01.org
CC: Linux Memory Management List <linux-mm@kvack.org>
TO: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
CC: "Marc Kleine-Budde" <mkl@pengutronix.de>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: b8170452cd5121b11a5726e3ea8dbdfc2d74e771
commit: cc4b08c31b5c51352f258032cc65e884b3e61e6a [10650/11475] can: do not increase tx_bytes statistics for RTR frames
:::::: branch date: 26 hours ago
:::::: commit date: 3 days ago
config: i386-randconfig-m021-20220107 (https://download.01.org/0day-ci/archive/20220109/202201090148.AauXMQpd-lkp(a)intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
New smatch warnings:
drivers/net/can/janz-ican3.c:1303 ican3_get_echo_skb() error: uninitialized symbol 'dlc'.
Old smatch warnings:
drivers/net/can/janz-ican3.c:1311 ican3_get_echo_skb() error: uninitialized symbol 'dlc'.
vim +/dlc +1303 drivers/net/can/janz-ican3.c
83702f69272e45 Ira W. Snyder 2012-07-19 1283
83702f69272e45 Ira W. Snyder 2012-07-19 1284 static unsigned int ican3_get_echo_skb(struct ican3_dev *mod)
83702f69272e45 Ira W. Snyder 2012-07-19 1285 {
83702f69272e45 Ira W. Snyder 2012-07-19 1286 struct sk_buff *skb = skb_dequeue(&mod->echoq);
83702f69272e45 Ira W. Snyder 2012-07-19 1287 struct can_frame *cf;
83702f69272e45 Ira W. Snyder 2012-07-19 1288 u8 dlc;
83702f69272e45 Ira W. Snyder 2012-07-19 1289
83702f69272e45 Ira W. Snyder 2012-07-19 1290 /* this should never trigger unless there is a driver bug */
83702f69272e45 Ira W. Snyder 2012-07-19 1291 if (!skb) {
83702f69272e45 Ira W. Snyder 2012-07-19 1292 netdev_err(mod->ndev, "BUG: echo skb not occupied\n");
83702f69272e45 Ira W. Snyder 2012-07-19 1293 return 0;
83702f69272e45 Ira W. Snyder 2012-07-19 1294 }
83702f69272e45 Ira W. Snyder 2012-07-19 1295
83702f69272e45 Ira W. Snyder 2012-07-19 1296 cf = (struct can_frame *)skb->data;
cc4b08c31b5c51 Vincent Mailhol 2021-12-07 1297 if (!(cf->can_id & CAN_RTR_FLAG))
c7b74967799b1a Oliver Hartkopp 2020-11-20 1298 dlc = cf->len;
83702f69272e45 Ira W. Snyder 2012-07-19 1299
83702f69272e45 Ira W. Snyder 2012-07-19 1300 /* check flag whether this packet has to be looped back */
83702f69272e45 Ira W. Snyder 2012-07-19 1301 if (skb->pkt_type != PACKET_LOOPBACK) {
83702f69272e45 Ira W. Snyder 2012-07-19 1302 kfree_skb(skb);
83702f69272e45 Ira W. Snyder 2012-07-19 @1303 return dlc;
83702f69272e45 Ira W. Snyder 2012-07-19 1304 }
83702f69272e45 Ira W. Snyder 2012-07-19 1305
83702f69272e45 Ira W. Snyder 2012-07-19 1306 skb->protocol = htons(ETH_P_CAN);
83702f69272e45 Ira W. Snyder 2012-07-19 1307 skb->pkt_type = PACKET_BROADCAST;
83702f69272e45 Ira W. Snyder 2012-07-19 1308 skb->ip_summed = CHECKSUM_UNNECESSARY;
83702f69272e45 Ira W. Snyder 2012-07-19 1309 skb->dev = mod->ndev;
83702f69272e45 Ira W. Snyder 2012-07-19 1310 netif_receive_skb(skb);
83702f69272e45 Ira W. Snyder 2012-07-19 1311 return dlc;
83702f69272e45 Ira W. Snyder 2012-07-19 1312 }
83702f69272e45 Ira W. Snyder 2012-07-19 1313
:::::: The code at line 1303 was first introduced by commit
:::::: 83702f69272e4591a91a27eb58eade1bcd361dae can: janz-ican3: fix support for CAN_RAW_RECV_OWN_MSGS
:::::: TO: Ira W. Snyder <iws@ovro.caltech.edu>
:::::: CC: Marc Kleine-Budde <mkl@pengutronix.de>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
next reply other threads:[~2022-01-08 17:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-08 17:42 kernel test robot [this message]
2022-01-10 6:49 [linux-next:master 10650/11475] drivers/net/can/janz-ican3.c:1303 ican3_get_echo_skb() error: uninitialized symbol 'dlc' Dan Carpenter
2022-01-08 12:05 ` kernel test robot
2022-01-10 7:09 ` Vincent MAILHOL
2022-01-10 7:09 ` Vincent MAILHOL
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