Re: [PATCH bpf-next v6 1/3] bpf: make common crypto API for TC/XDP programs

[kernel test robot <lkp@intel.com>]

Hi Vadim,

kernel test robot noticed the following build errors:

[auto build test ERROR on bpf-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Vadim-Fedorenko/bpf-crypto-add-skcipher-to-bpf-crypto/20231130-014813
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20231129173312.31008-1-vadfed%40meta.com
patch subject: [PATCH bpf-next v6 1/3] bpf: make common crypto API for TC/XDP programs
config: arm64-randconfig-r081-20231130 (https://download.01.org/0day-ci/archive/20231130/202311300742.fDSG2vce-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231130/202311300742.fDSG2vce-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311300742.fDSG2vce-lkp@intel.com/

All errors (new ones prefixed by >>):

>> kernel/bpf/crypto.c:179:46: error: expected ')'
     179 |                 *err = type->setauthsize(ctx->tfm, authsize;
         |                                                            ^
   kernel/bpf/crypto.c:179:27: note: to match this '('
     179 |                 *err = type->setauthsize(ctx->tfm, authsize;
         |                                         ^
   1 error generated.


vim +179 kernel/bpf/crypto.c

   105	
   106	/**
   107	 * bpf_crypto_ctx_create() - Create a mutable BPF crypto context.
   108	 *
   109	 * Allocates a crypto context that can be used, acquired, and released by
   110	 * a BPF program. The crypto context returned by this function must either
   111	 * be embedded in a map as a kptr, or freed with bpf_crypto_ctx_release().
   112	 * As crypto API functions use GFP_KERNEL allocations, this function can
   113	 * only be used in sleepable BPF programs.
   114	 *
   115	 * bpf_crypto_ctx_create() allocates memory for crypto context.
   116	 * It may return NULL if no memory is available.
   117	 * @type__str: pointer to string representation of crypto type.
   118	 * @algo__str: pointer to string representation of algorithm.
   119	 * @pkey:      bpf_dynptr which holds cipher key to do crypto.
   120	 * @err:       integer to store error code when NULL is returned
   121	 */
   122	__bpf_kfunc struct bpf_crypto_ctx *
   123	bpf_crypto_ctx_create(const char *type__str, const char *algo__str,
   124			      const struct bpf_dynptr_kern *pkey,
   125			      unsigned int authsize, int *err)
   126	{
   127		const struct bpf_crypto_type *type = bpf_crypto_get_type(type__str);
   128		struct bpf_crypto_ctx *ctx;
   129		const u8 *key;
   130		u32 key_len;
   131	
   132		//type = bpf_crypto_get_type(type__str);
   133		if (IS_ERR(type)) {
   134			*err = PTR_ERR(type);
   135			return NULL;
   136		}
   137	
   138		if (!type->has_algo(algo__str)) {
   139			*err = -EOPNOTSUPP;
   140			goto err;
   141		}
   142	
   143		if (!authsize && type->setauthsize) {
   144			*err = -EOPNOTSUPP;
   145			goto err;
   146		}
   147	
   148		if (authsize && !type->setauthsize) {
   149			*err = -EOPNOTSUPP;
   150			goto err;
   151		}
   152	
   153		key_len = __bpf_dynptr_size(pkey);
   154		if (!key_len) {
   155			*err = -EINVAL;
   156			goto err;
   157		}
   158		key = __bpf_dynptr_data(pkey, key_len);
   159		if (!key) {
   160			*err = -EINVAL;
   161			goto err;
   162		}
   163	
   164		ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
   165		if (!ctx) {
   166			*err = -ENOMEM;
   167			goto err;
   168		}
   169	
   170		ctx->type = type;
   171		ctx->tfm = type->alloc_tfm(algo__str);
   172		if (IS_ERR(ctx->tfm)) {
   173			*err = PTR_ERR(ctx->tfm);
   174			ctx->tfm = NULL;
   175			goto err;
   176		}
   177	
   178		if (authsize) {
 > 179			*err = type->setauthsize(ctx->tfm, authsize;
   180			if (*err)
   181				goto err;
   182		}
   183	
   184		*err = type->setkey(ctx->tfm, key, key_len);
   185		if (*err)
   186			goto err;
   187	
   188		refcount_set(&ctx->usage, 1);
   189	
   190		return ctx;
   191	err:
   192		if (ctx->tfm)
   193			type->free_tfm(ctx->tfm);
   194		kfree(ctx);
   195		module_put(type->owner);
   196	
   197		return NULL;
   198	}
   199	

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