[ti:ti-linux-5.4.y 8677/13413] net/core/sock.c:2306:14: sparse: sparse: incompatible types for 'case' statement

[ti:ti-linux-5.4.y 8677/13413] net/core/sock.c:2306:14: sparse: sparse: incompatible types for 'case' statement

[kernel test robot]

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tree:   git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-linux-5.4.y
head:   87c0425824b4169e4d697c4f6219243249a8c08b
commit: a4aead6fc0566e064448dc8363333b78f7bb1545 [8677/13413] net: socket: accept redundant network info in control message
config: sparc64-randconfig-s032-20210307 (attached as .config)
compiler: sparc64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-245-gacc5c298-dirty
        git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git
        git fetch --no-tags ti ti-linux-5.4.y
        git checkout a4aead6fc0566e064448dc8363333b78f7bb1545
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sparc64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


"sparse warnings: (new ones prefixed by >>)"
   net/core/sock.c:2306:14: sparse: sparse: undefined identifier 'SCM_REDUNDANT'
>> net/core/sock.c:2306:14: sparse: sparse: incompatible types for 'case' statement
   net/core/sock.c:3051:46: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void const *from @@     got struct __kernel_old_timeval [noderef] <asn:1> * @@
   net/core/sock.c:3051:46: sparse:     expected void const *from
   net/core/sock.c:3051:46: sparse:     got struct __kernel_old_timeval [noderef] <asn:1> *
   net/core/sock.c:3102:35: sparse: sparse: undefined identifier 'SCM_REDUNDANT'
   net/core/sock.c:1910:9: sparse: sparse: context imbalance in 'sk_clone_lock' - wrong count at exit
   net/core/sock.c:1914:6: sparse: sparse: context imbalance in 'sk_free_unlock_clone' - unexpected unlock
   net/core/sock.c:2306:14: sparse: sparse: Expected constant expression in case statement

vim +/case +2306 net/core/sock.c

  2269	
  2270	int __sock_cmsg_send(struct sock *sk, struct msghdr *msg, struct cmsghdr *cmsg,
  2271			     struct sockcm_cookie *sockc)
  2272	{
  2273		struct skb_redundant_info *cred;
  2274		u32 tsflags;
  2275	
  2276		switch (cmsg->cmsg_type) {
  2277		case SO_MARK:
  2278			if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
  2279				return -EPERM;
  2280			if (cmsg->cmsg_len != CMSG_LEN(sizeof(u32)))
  2281				return -EINVAL;
  2282			sockc->mark = *(u32 *)CMSG_DATA(cmsg);
  2283			break;
  2284		case SO_TIMESTAMPING_OLD:
  2285			if (cmsg->cmsg_len != CMSG_LEN(sizeof(u32)))
  2286				return -EINVAL;
  2287	
  2288			tsflags = *(u32 *)CMSG_DATA(cmsg);
  2289			if (tsflags & ~SOF_TIMESTAMPING_TX_RECORD_MASK)
  2290				return -EINVAL;
  2291	
  2292			sockc->tsflags &= ~SOF_TIMESTAMPING_TX_RECORD_MASK;
  2293			sockc->tsflags |= tsflags;
  2294			break;
  2295		case SCM_TXTIME:
  2296			if (!sock_flag(sk, SOCK_TXTIME))
  2297				return -EINVAL;
  2298			if (cmsg->cmsg_len != CMSG_LEN(sizeof(u64)))
  2299				return -EINVAL;
  2300			sockc->transmit_time = get_unaligned((u64 *)CMSG_DATA(cmsg));
  2301			break;
  2302		/* SCM_RIGHTS and SCM_CREDENTIALS are semantically in SOL_UNIX. */
  2303		case SCM_RIGHTS:
  2304		case SCM_CREDENTIALS:
  2305			break;
> 2306		case SCM_REDUNDANT:
  2307			if (cmsg->cmsg_len !=
  2308			    CMSG_LEN(sizeof(struct skb_redundant_info)))
  2309				return -EINVAL;
  2310	
  2311			cred = (struct skb_redundant_info *)CMSG_DATA(cmsg);
  2312			memcpy(&sockc->redinfo, cred,
  2313			       sizeof(struct skb_redundant_info));
  2314			break;
  2315		default:
  2316			return -EINVAL;
  2317		}
  2318		return 0;
  2319	}
  2320	EXPORT_SYMBOL(__sock_cmsg_send);
  2321	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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