[staging:staging-next 446/587] drivers/staging/lustre/lnet/lnet/lib-socket.c:212:16-19: ERROR: reference preceded by free on line 198 (fwd)

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Please check whether line 212 is reachable from line 198.

julia

---------- Forwarded message ----------
Date: Sat, 27 Jan 2018 16:00:47 +0800
From: kbuild test robot <fengguang.wu@xxxxxxxxx>
To: kbuild@xxxxxx
Cc: Julia Lawall <julia.lawall@xxxxxxx>
Subject: [staging:staging-next 446/587]
    drivers/staging/lustre/lnet/lnet/lib-socket.c:212:16-19: ERROR: reference
    preceded by free on line 198


tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git staging-next
head:   3384e01179eff2b2fe91ba7bcad98ee2be5f87f7
commit: 464dbfcaa2d581c6bc03e87c73af1dc403336b85 [446/587] staging: lustre: more LIBCFS_ALLOC conversions to GFP_KERNEL allocations.
:::::: branch date: 18 hours ago
:::::: commit date: 3 weeks ago

>> drivers/staging/lustre/lnet/lnet/lib-socket.c:212:16-19: ERROR: reference preceded by free on line 198
   drivers/staging/lustre/lnet/lnet/lib-socket.c:238:7-10: ERROR: reference preceded by free on line 198
--
>> drivers/staging/lustre/lnet/selftest/conctl.c:651:10-17: WARNING opportunity for memdup_user
   drivers/staging/lustre/lnet/selftest/conctl.c:704:7-14: WARNING opportunity for memdup_user

# https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git/commit/?id=464dbfcaa2d581c6bc03e87c73af1dc403336b85
git remote add staging https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
git remote update staging
git checkout 464dbfcaa2d581c6bc03e87c73af1dc403336b85
vim +212 drivers/staging/lustre/lnet/lnet/lib-socket.c

d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  148
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  149  int
1ad6a73ef drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2015-06-08  150  lnet_ipif_enumerate(char ***namesp)
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  151  {
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  152  	/* Allocate and fill in 'names', returning # interfaces/error */
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  153  	char **names;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  154  	int toobig;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  155  	int nalloc;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  156  	int nfound;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  157  	struct ifreq *ifr;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  158  	struct ifconf ifc;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  159  	int rc;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  160  	int nob;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  161  	int i;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  162
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  163  	nalloc = 16;	/* first guess at max interfaces */
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  164  	toobig = 0;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  165  	for (;;) {
09cbfeaf1 drivers/staging/lustre/lnet/lnet/lib-socket.c            Kirill A. Shutemov 2016-04-01  166  		if (nalloc * sizeof(*ifr) > PAGE_SIZE) {
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  167  			toobig = 1;
09cbfeaf1 drivers/staging/lustre/lnet/lnet/lib-socket.c            Kirill A. Shutemov 2016-04-01  168  			nalloc = PAGE_SIZE / sizeof(*ifr);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  169  			CWARN("Too many interfaces: only enumerating first %d\n",
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  170  			      nalloc);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  171  		}
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  172
464dbfcaa drivers/staging/lustre/lnet/lnet/lib-socket.c            NeilBrown          2018-01-09  173  		ifr = kzalloc(nalloc * sizeof(*ifr), GFP_KERNEL);
06ace26ed drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2016-02-12  174  		if (!ifr) {
730928920 drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2015-06-08  175  			CERROR("ENOMEM enumerating up to %d interfaces\n",
730928920 drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2015-06-08  176  			       nalloc);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  177  			rc = -ENOMEM;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  178  			goto out0;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  179  		}
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  180
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  181  		ifc.ifc_buf = (char *)ifr;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  182  		ifc.ifc_len = nalloc * sizeof(*ifr);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  183
1ad6a73ef drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2015-06-08  184  		rc = lnet_sock_ioctl(SIOCGIFCONF, (unsigned long)&ifc);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  185  		if (rc < 0) {
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  186  			CERROR("Error %d enumerating interfaces\n", rc);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  187  			goto out1;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  188  		}
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  189
5fd88337d drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2016-02-12  190  		LASSERT(!rc);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  191
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  192  		nfound = ifc.ifc_len / sizeof(*ifr);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  193  		LASSERT(nfound <= nalloc);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  194
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  195  		if (nfound < nalloc || toobig)
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  196  			break;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  197
464dbfcaa drivers/staging/lustre/lnet/lnet/lib-socket.c            NeilBrown          2018-01-09 @198  		kfree(ifr);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  199  		nalloc *= 2;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  200  	}
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  201
5fd88337d drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2016-02-12  202  	if (!nfound)
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  203  		goto out1;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  204
464dbfcaa drivers/staging/lustre/lnet/lnet/lib-socket.c            NeilBrown          2018-01-09  205  	names = kzalloc(nfound * sizeof(*names), GFP_KERNEL);
06ace26ed drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2016-02-12  206  	if (!names) {
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  207  		rc = -ENOMEM;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  208  		goto out1;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  209  	}
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  210
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  211  	for (i = 0; i < nfound; i++) {
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02 @212  		nob = strnlen(ifr[i].ifr_name, IFNAMSIZ);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  213  		if (nob == IFNAMSIZ) {
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  214  			/* no space for terminating NULL */
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  215  			CERROR("interface name %.*s too long (%d max)\n",
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  216  			       nob, ifr[i].ifr_name, IFNAMSIZ);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  217  			rc = -ENAMETOOLONG;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  218  			goto out2;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  219  		}
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  220
464dbfcaa drivers/staging/lustre/lnet/lnet/lib-socket.c            NeilBrown          2018-01-09  221  		names[i] = kmalloc(IFNAMSIZ, GFP_KERNEL);
06ace26ed drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2016-02-12  222  		if (!names[i]) {
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  223  			rc = -ENOMEM;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  224  			goto out2;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  225  		}
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  226
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  227  		memcpy(names[i], ifr[i].ifr_name, nob);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  228  		names[i][nob] = 0;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  229  	}
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  230
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  231  	*namesp = names;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  232  	rc = nfound;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  233
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  234  out2:
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  235  	if (rc < 0)
1ad6a73ef drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2015-06-08  236  		lnet_ipif_free_enumeration(names, nfound);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  237  out1:
464dbfcaa drivers/staging/lustre/lnet/lnet/lib-socket.c            NeilBrown          2018-01-09  238  	kfree(ifr);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  239  out0:
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  240  	return rc;
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  241  }
1ad6a73ef drivers/staging/lustre/lnet/lnet/lib-socket.c            James Simmons      2015-06-08  242  EXPORT_SYMBOL(lnet_ipif_enumerate);
d7e09d039 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c Peng Tao           2013-05-02  243

:::::: The code at line 212 was first introduced by commit
:::::: d7e09d0397e84eefbabfd9cb353221f3c6448d83 staging: add Lustre file system client support

:::::: TO: Peng Tao <bergwolf@xxxxxxxxx>
:::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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