netdev - Re: [PATCH net-next 06/11] net: mctp: provide a more specific tag allocation ioctl

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Mon, 19 Feb 2024 11:22:12 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: oe-kbuild@...ts.linux.dev, Jeremy Kerr <jk@...econstruct.com.au>,
	netdev@...r.kernel.org
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
	Matt Johnston <matt@...econstruct.com.au>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	David Howells <dhowells@...hat.com>,
	Alexander Lobakin <aleksander.lobakin@...el.com>,
	Liang Chen <liangchen.linux@...il.com>,
	Johannes Berg <johannes.berg@...el.com>
Subject: Re: [PATCH net-next 06/11] net: mctp: provide a more specific tag
 allocation ioctl

Hi Jeremy,

kernel test robot noticed the following build warnings:

url:    https://github.com/intel-lab-lkp/linux/commits/Jeremy-Kerr/net-mctp-avoid-confusion-over-local-peer-dest-source-addresses/20240216-163203
base:   net-next/main
patch link:    https://lore.kernel.org/r/424009ba3e320ae93eb6bd44ef5e474aa5c9221f.1708071380.git.jk%40codeconstruct.com.au
patch subject: [PATCH net-next 06/11] net: mctp: provide a more specific tag allocation ioctl
config: parisc-randconfig-r081-20240218 (https://download.01.org/0day-ci/archive/20240218/202402181713.OQAPBmZC-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 13.2.0

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
| Closes: https://lore.kernel.org/r/202402181713.OQAPBmZC-lkp@intel.com/

smatch warnings:
net/mctp/af_mctp.c:389 mctp_ioctl_tag_copy_from_user() warn: was && intended here instead of ||?

vim +389 net/mctp/af_mctp.c

28828bad95a357 Jeremy Kerr 2024-02-16  356  static int mctp_ioctl_tag_copy_from_user(unsigned long arg,
28828bad95a357 Jeremy Kerr 2024-02-16  357  					 struct mctp_ioc_tag_ctl2 *ctl,
28828bad95a357 Jeremy Kerr 2024-02-16  358  					 bool tagv2)
28828bad95a357 Jeremy Kerr 2024-02-16  359  {
28828bad95a357 Jeremy Kerr 2024-02-16  360  	struct mctp_ioc_tag_ctl ctl_compat;
28828bad95a357 Jeremy Kerr 2024-02-16  361  	unsigned long size;
28828bad95a357 Jeremy Kerr 2024-02-16  362  	void *ptr;
28828bad95a357 Jeremy Kerr 2024-02-16  363  	int rc;
28828bad95a357 Jeremy Kerr 2024-02-16  364  
28828bad95a357 Jeremy Kerr 2024-02-16  365  	if (tagv2) {
28828bad95a357 Jeremy Kerr 2024-02-16  366  		size = sizeof(*ctl);
28828bad95a357 Jeremy Kerr 2024-02-16  367  		ptr = ctl;
28828bad95a357 Jeremy Kerr 2024-02-16  368  	} else {
28828bad95a357 Jeremy Kerr 2024-02-16  369  		size = sizeof(ctl_compat);
28828bad95a357 Jeremy Kerr 2024-02-16  370  		ptr = &ctl_compat;
28828bad95a357 Jeremy Kerr 2024-02-16  371  	}
28828bad95a357 Jeremy Kerr 2024-02-16  372  
28828bad95a357 Jeremy Kerr 2024-02-16  373  	rc = copy_from_user(ptr, (void __user *)arg, size);
28828bad95a357 Jeremy Kerr 2024-02-16  374  	if (rc)
28828bad95a357 Jeremy Kerr 2024-02-16  375  		return -EFAULT;
28828bad95a357 Jeremy Kerr 2024-02-16  376  
28828bad95a357 Jeremy Kerr 2024-02-16  377  	if (!tagv2) {
28828bad95a357 Jeremy Kerr 2024-02-16  378  		/* compat, using defaults for new fields */
28828bad95a357 Jeremy Kerr 2024-02-16  379  		ctl->net = MCTP_INITIAL_DEFAULT_NET;
28828bad95a357 Jeremy Kerr 2024-02-16  380  		ctl->peer_addr = ctl_compat.peer_addr;
28828bad95a357 Jeremy Kerr 2024-02-16  381  		ctl->local_addr = MCTP_ADDR_ANY;
28828bad95a357 Jeremy Kerr 2024-02-16  382  		ctl->flags = ctl_compat.flags;
28828bad95a357 Jeremy Kerr 2024-02-16  383  		ctl->tag = ctl_compat.tag;
28828bad95a357 Jeremy Kerr 2024-02-16  384  	}
28828bad95a357 Jeremy Kerr 2024-02-16  385  
28828bad95a357 Jeremy Kerr 2024-02-16  386  	if (ctl->flags)
28828bad95a357 Jeremy Kerr 2024-02-16  387  		return -EINVAL;
28828bad95a357 Jeremy Kerr 2024-02-16  388  
28828bad95a357 Jeremy Kerr 2024-02-16 @389  	if (!(ctl->local_addr != MCTP_ADDR_ANY ||
28828bad95a357 Jeremy Kerr 2024-02-16  390  	      ctl->local_addr != MCTP_ADDR_NULL))
28828bad95a357 Jeremy Kerr 2024-02-16  391  		return -EINVAL;

Should be &&.  This function will always return -EINVAL.  I haven't
looked at the context outside of this automatically generated email but
it suggests a failure in our test process.

28828bad95a357 Jeremy Kerr 2024-02-16  392  
28828bad95a357 Jeremy Kerr 2024-02-16  393  	return 0;
28828bad95a357 Jeremy Kerr 2024-02-16  394  }

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki