[PATCH v2 3/6] LSM: security_lsmblob_to_secctx module selection

Sat Mar 8 15:52:59 UTC 2025

Hi Casey,

kernel test robot noticed the following build warnings:

[auto build test WARNING on pcmoore-selinux/next]
[also build test WARNING on linus/master v6.14-rc5 next-20250307]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Casey-Schaufler/Audit-Create-audit_stamp-structure/20250308-024950
base:   https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git next
patch link:    https://lore.kernel.org/r/20250307183701.16970-4-casey%40schaufler-ca.com
patch subject: [PATCH v2 3/6] LSM: security_lsmblob_to_secctx module selection
config: arc-randconfig-001-20250308 (https://download.01.org/0day-ci/archive/20250308/202503082328.C7GyGU63-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250308/202503082328.C7GyGU63-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503082328.C7GyGU63-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> security/security.c:4325: warning: Excess function parameter 'lsmid' description in 'security_secid_to_secctx'
>> security/security.c:4344: warning: Function parameter or struct member 'lsmid' not described in 'security_lsmprop_to_secctx'

vim +4325 security/security.c

746df9b59c8a5f1 David Quigley   2013-05-22  4310  
e261301c851aee4 Paul Moore      2023-02-16  4311  /**
e261301c851aee4 Paul Moore      2023-02-16  4312   * security_secid_to_secctx() - Convert a secid to a secctx
e261301c851aee4 Paul Moore      2023-02-16  4313   * @secid: secid
2d470c778120d3c Casey Schaufler 2024-10-23  4314   * @cp: the LSM context
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4315   * @lsmid: which security module to report
e261301c851aee4 Paul Moore      2023-02-16  4316   *
2d470c778120d3c Casey Schaufler 2024-10-23  4317   * Convert secid to security context.  If @cp is NULL the length of the
2d470c778120d3c Casey Schaufler 2024-10-23  4318   * result will be returned, but no data will be returned.  This
e261301c851aee4 Paul Moore      2023-02-16  4319   * does mean that the length could change between calls to check the length and
2d470c778120d3c Casey Schaufler 2024-10-23  4320   * the next call which actually allocates and returns the data.
e261301c851aee4 Paul Moore      2023-02-16  4321   *
2d470c778120d3c Casey Schaufler 2024-10-23  4322   * Return: Return length of data on success, error on failure.
e261301c851aee4 Paul Moore      2023-02-16  4323   */
2d470c778120d3c Casey Schaufler 2024-10-23  4324  int security_secid_to_secctx(u32 secid, struct lsm_context *cp)
20510f2f4e2dabb James Morris    2007-10-16 @4325  {
2d470c778120d3c Casey Schaufler 2024-10-23  4326  	return call_int_hook(secid_to_secctx, secid, cp);
20510f2f4e2dabb James Morris    2007-10-16  4327  }
20510f2f4e2dabb James Morris    2007-10-16  4328  EXPORT_SYMBOL(security_secid_to_secctx);
20510f2f4e2dabb James Morris    2007-10-16  4329  
6f2f724f0e116d9 Casey Schaufler 2024-10-09  4330  /**
6f2f724f0e116d9 Casey Schaufler 2024-10-09  4331   * security_lsmprop_to_secctx() - Convert a lsm_prop to a secctx
6f2f724f0e116d9 Casey Schaufler 2024-10-09  4332   * @prop: lsm specific information
2d470c778120d3c Casey Schaufler 2024-10-23  4333   * @cp: the LSM context
6f2f724f0e116d9 Casey Schaufler 2024-10-09  4334   *
2d470c778120d3c Casey Schaufler 2024-10-23  4335   * Convert a @prop entry to security context.  If @cp is NULL the
2d470c778120d3c Casey Schaufler 2024-10-23  4336   * length of the result will be returned. This does mean that the
2d470c778120d3c Casey Schaufler 2024-10-23  4337   * length could change between calls to check the length and the
2d470c778120d3c Casey Schaufler 2024-10-23  4338   * next call which actually allocates and returns the @cp.
6f2f724f0e116d9 Casey Schaufler 2024-10-09  4339   *
2d470c778120d3c Casey Schaufler 2024-10-23  4340   * Return: Return length of data on success, error on failure.
6f2f724f0e116d9 Casey Schaufler 2024-10-09  4341   */
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4342  int security_lsmprop_to_secctx(struct lsm_prop *prop, struct lsm_context *cp,
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4343  			       int lsmid)
6f2f724f0e116d9 Casey Schaufler 2024-10-09 @4344  {
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4345  	struct lsm_static_call *scall;
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4346  
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4347  	lsm_for_each_hook(scall, lsmprop_to_secctx) {
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4348  		if (lsmid != 0 && lsmid != scall->hl->lsmid->id)
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4349  			continue;
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4350  		return scall->hl->hook.lsmprop_to_secctx(prop, cp);
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4351  	}
c6b93968f3f6d88 Casey Schaufler 2025-03-07  4352  	return LSM_RET_DEFAULT(lsmprop_to_secctx);
6f2f724f0e116d9 Casey Schaufler 2024-10-09  4353  }
6f2f724f0e116d9 Casey Schaufler 2024-10-09  4354  EXPORT_SYMBOL(security_lsmprop_to_secctx);
6f2f724f0e116d9 Casey Schaufler 2024-10-09  4355  

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