linux-kernel - [gustavoars:testing/WFAMNAE-next20240305 1/1] include/linux/bpf-cgroup.h:191:22: sparse: sparse: incompatible types in comparison expression (different base types):

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Message-ID: <202403090203.mM0o7gTP-lkp@intel.com>
Date: Sat, 9 Mar 2024 02:44:19 +0800
From: kernel test robot <lkp@...el.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev,
	"Gustavo A. R. Silva" <gustavo@...eddedor.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [gustavoars:testing/WFAMNAE-next20240305 1/1]
 include/linux/bpf-cgroup.h:191:22: sparse: sparse: incompatible types in
 comparison expression (different base types):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/WFAMNAE-next20240305
head:   3a02035a7f980ddbf41dd11815bb4e5f29e104d5
commit: 3a02035a7f980ddbf41dd11815bb4e5f29e104d5 [1/1] treewide: Address -Wflex-array-member-not-at-end warnings
config: x86_64-randconfig-122-20240308 (https://download.01.org/0day-ci/archive/20240309/202403090203.mM0o7gTP-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240309/202403090203.mM0o7gTP-lkp@intel.com/reproduce)

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>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403090203.mM0o7gTP-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   net/socket.c: note: in included file:
>> include/linux/bpf-cgroup.h:191:22: sparse: sparse: incompatible types in comparison expression (different base types):
   include/linux/bpf-cgroup.h:191:22: sparse:    struct bpf_prog_array *
   include/linux/bpf-cgroup.h:191:22: sparse:    struct bpf_prog_array_hdr *
>> include/linux/bpf-cgroup.h:191:22: sparse: sparse: incompatible types in comparison expression (different base types):
   include/linux/bpf-cgroup.h:191:22: sparse:    struct bpf_prog_array *
   include/linux/bpf-cgroup.h:191:22: sparse:    struct bpf_prog_array_hdr *

vim +191 include/linux/bpf-cgroup.h

de9cbbaadba5ad Roman Gushchin 2018-08-02  178  
b741f1630346de Roman Gushchin 2018-09-28  179  int bpf_percpu_cgroup_storage_copy(struct bpf_map *map, void *key, void *value);
b741f1630346de Roman Gushchin 2018-09-28  180  int bpf_percpu_cgroup_storage_update(struct bpf_map *map, void *key,
b741f1630346de Roman Gushchin 2018-09-28  181  				     void *value, u64 flags);
b741f1630346de Roman Gushchin 2018-09-28  182  
46531a30364bd4 Pavel Begunkov 2022-01-27  183  /* Opportunistic check to see whether we have any BPF program attached*/
46531a30364bd4 Pavel Begunkov 2022-01-27  184  static inline bool cgroup_bpf_sock_enabled(struct sock *sk,
46531a30364bd4 Pavel Begunkov 2022-01-27  185  					   enum cgroup_bpf_attach_type type)
46531a30364bd4 Pavel Begunkov 2022-01-27  186  {
46531a30364bd4 Pavel Begunkov 2022-01-27  187  	struct cgroup *cgrp = sock_cgroup_ptr(&sk->sk_cgrp_data);
46531a30364bd4 Pavel Begunkov 2022-01-27  188  	struct bpf_prog_array *array;
46531a30364bd4 Pavel Begunkov 2022-01-27  189  
46531a30364bd4 Pavel Begunkov 2022-01-27  190  	array = rcu_access_pointer(cgrp->bpf.effective[type]);
46531a30364bd4 Pavel Begunkov 2022-01-27 @191  	return array != &bpf_empty_prog_array.hdr;
46531a30364bd4 Pavel Begunkov 2022-01-27  192  }
46531a30364bd4 Pavel Begunkov 2022-01-27  193  

:::::: The code at line 191 was first introduced by commit
:::::: 46531a30364bd483bfa1b041c15d42a196e77e93 cgroup/bpf: fast path skb BPF filtering

:::::: TO: Pavel Begunkov <asml.silence@...il.com>
:::::: CC: Alexei Starovoitov <ast@...nel.org>

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