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Message-ID: <202408302309.08WssiJu-lkp@intel.com>
Date: Fri, 30 Aug 2024 23:26:09 +0800
From: kernel test robot <lkp@...el.com>
To: Casey Schaufler <casey@...aufler-ca.com>, paul@...l-moore.com,
	linux-security-module@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev, jmorris@...ei.org,
	serge@...lyn.com, keescook@...omium.org,
	john.johansen@...onical.com, penguin-kernel@...ove.sakura.ne.jp,
	stephen.smalley.work@...il.com, linux-kernel@...r.kernel.org,
	selinux@...r.kernel.org, mic@...ikod.net,
	linux-integrity@...r.kernel.org, audit@...r.kernel.org,
	Todd Kjos <tkjos@...gle.com>
Subject: Re: [PATCH v2 10/13] LSM: Create new security_cred_getlsmblob LSM
 hook

Hi Casey,

kernel test robot noticed the following build warnings:

[auto build test WARNING on pcmoore-audit/next]
[also build test WARNING on pcmoore-selinux/next zohar-integrity/next-integrity linus/master v6.11-rc5 next-20240830]
[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/LSM-Add-the-lsmblob-data-structure/20240830-085050
base:   https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit.git next
patch link:    https://lore.kernel.org/r/20240830003411.16818-11-casey%40schaufler-ca.com
patch subject: [PATCH v2 10/13] LSM: Create new security_cred_getlsmblob LSM hook
config: i386-buildonly-randconfig-006-20240830 (https://download.01.org/0day-ci/archive/20240830/202408302309.08WssiJu-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240830/202408302309.08WssiJu-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/202408302309.08WssiJu-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from kernel/dma/swiotlb.c:53:
   In file included from include/trace/events/swiotlb.h:41:
   In file included from include/trace/define_trace.h:102:
   In file included from include/trace/trace_events.h:21:
   In file included from include/linux/trace_events.h:10:
   In file included from include/linux/perf_event.h:62:
   include/linux/security.h:1199:3: error: use of undeclared identifier 'secid'
    1199 |         *secid = 0;
         |          ^
>> kernel/dma/swiotlb.c:639:20: warning: shift count >= width of type [-Wshift-count-overflow]
     638 |                 if (IS_ENABLED(CONFIG_ZONE_DMA32) &&
         |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     639 |                     phys_limit < DMA_BIT_MASK(64) &&
         |                     ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
     640 |                     !(gfp & (__GFP_DMA32 | __GFP_DMA)))
         |                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:77:54: note: expanded from macro 'DMA_BIT_MASK'
      77 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
         |                                                      ^
   include/linux/compiler.h:55:47: note: expanded from macro 'if'
      55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
         |                            ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:57:52: note: expanded from macro '__trace_if_var'
      57 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
         |                                                    ^~~~
>> kernel/dma/swiotlb.c:639:20: warning: shift count >= width of type [-Wshift-count-overflow]
     638 |                 if (IS_ENABLED(CONFIG_ZONE_DMA32) &&
         |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     639 |                     phys_limit < DMA_BIT_MASK(64) &&
         |                     ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
     640 |                     !(gfp & (__GFP_DMA32 | __GFP_DMA)))
         |                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:77:54: note: expanded from macro 'DMA_BIT_MASK'
      77 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
         |                                                      ^
   include/linux/compiler.h:55:47: note: expanded from macro 'if'
      55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
         |                            ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:57:61: note: expanded from macro '__trace_if_var'
      57 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
         |                                                             ^~~~
>> kernel/dma/swiotlb.c:639:20: warning: shift count >= width of type [-Wshift-count-overflow]
     638 |                 if (IS_ENABLED(CONFIG_ZONE_DMA32) &&
         |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     639 |                     phys_limit < DMA_BIT_MASK(64) &&
         |                     ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
     640 |                     !(gfp & (__GFP_DMA32 | __GFP_DMA)))
         |                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:77:54: note: expanded from macro 'DMA_BIT_MASK'
      77 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
         |                                                      ^
   include/linux/compiler.h:55:47: note: expanded from macro 'if'
      55 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
         |                            ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:57:86: note: expanded from macro '__trace_if_var'
      57 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
         |                                                                     ~~~~~~~~~~~~~~~~~^~~~~
   include/linux/compiler.h:68:3: note: expanded from macro '__trace_if_value'
      68 |         (cond) ?                                        \
         |          ^~~~
   3 warnings and 1 error generated.


vim +639 kernel/dma/swiotlb.c

79636caad3618e Petr Tesarik 2023-08-01  602  
79636caad3618e Petr Tesarik 2023-08-01  603  /**
79636caad3618e Petr Tesarik 2023-08-01  604   * swiotlb_alloc_tlb() - allocate a dynamic IO TLB buffer
79636caad3618e Petr Tesarik 2023-08-01  605   * @dev:	Device for which a memory pool is allocated.
79636caad3618e Petr Tesarik 2023-08-01  606   * @bytes:	Size of the buffer.
79636caad3618e Petr Tesarik 2023-08-01  607   * @phys_limit:	Maximum allowed physical address of the buffer.
79636caad3618e Petr Tesarik 2023-08-01  608   * @gfp:	GFP flags for the allocation.
79636caad3618e Petr Tesarik 2023-08-01  609   *
79636caad3618e Petr Tesarik 2023-08-01  610   * Return: Allocated pages, or %NULL on allocation failure.
79636caad3618e Petr Tesarik 2023-08-01  611   */
79636caad3618e Petr Tesarik 2023-08-01  612  static struct page *swiotlb_alloc_tlb(struct device *dev, size_t bytes,
79636caad3618e Petr Tesarik 2023-08-01  613  		u64 phys_limit, gfp_t gfp)
79636caad3618e Petr Tesarik 2023-08-01  614  {
79636caad3618e Petr Tesarik 2023-08-01  615  	struct page *page;
79636caad3618e Petr Tesarik 2023-08-01  616  
79636caad3618e Petr Tesarik 2023-08-01  617  	/*
79636caad3618e Petr Tesarik 2023-08-01  618  	 * Allocate from the atomic pools if memory is encrypted and
79636caad3618e Petr Tesarik 2023-08-01  619  	 * the allocation is atomic, because decrypting may block.
79636caad3618e Petr Tesarik 2023-08-01  620  	 */
79636caad3618e Petr Tesarik 2023-08-01  621  	if (!gfpflags_allow_blocking(gfp) && dev && force_dma_unencrypted(dev)) {
79636caad3618e Petr Tesarik 2023-08-01  622  		void *vaddr;
79636caad3618e Petr Tesarik 2023-08-01  623  
79636caad3618e Petr Tesarik 2023-08-01  624  		if (!IS_ENABLED(CONFIG_DMA_COHERENT_POOL))
79636caad3618e Petr Tesarik 2023-08-01  625  			return NULL;
79636caad3618e Petr Tesarik 2023-08-01  626  
79636caad3618e Petr Tesarik 2023-08-01  627  		return dma_alloc_from_pool(dev, bytes, &vaddr, gfp,
79636caad3618e Petr Tesarik 2023-08-01  628  					   dma_coherent_ok);
79636caad3618e Petr Tesarik 2023-08-01  629  	}
79636caad3618e Petr Tesarik 2023-08-01  630  
79636caad3618e Petr Tesarik 2023-08-01  631  	gfp &= ~GFP_ZONEMASK;
79636caad3618e Petr Tesarik 2023-08-01  632  	if (phys_limit <= DMA_BIT_MASK(zone_dma_bits))
79636caad3618e Petr Tesarik 2023-08-01  633  		gfp |= __GFP_DMA;
79636caad3618e Petr Tesarik 2023-08-01  634  	else if (phys_limit <= DMA_BIT_MASK(32))
79636caad3618e Petr Tesarik 2023-08-01  635  		gfp |= __GFP_DMA32;
79636caad3618e Petr Tesarik 2023-08-01  636  
a5e3b127455d07 Petr Tesarik 2023-11-02  637  	while (IS_ERR(page = alloc_dma_pages(gfp, bytes, phys_limit))) {
79636caad3618e Petr Tesarik 2023-08-01  638  		if (IS_ENABLED(CONFIG_ZONE_DMA32) &&
79636caad3618e Petr Tesarik 2023-08-01 @639  		    phys_limit < DMA_BIT_MASK(64) &&
79636caad3618e Petr Tesarik 2023-08-01  640  		    !(gfp & (__GFP_DMA32 | __GFP_DMA)))
79636caad3618e Petr Tesarik 2023-08-01  641  			gfp |= __GFP_DMA32;
79636caad3618e Petr Tesarik 2023-08-01  642  		else if (IS_ENABLED(CONFIG_ZONE_DMA) &&
79636caad3618e Petr Tesarik 2023-08-01  643  			 !(gfp & __GFP_DMA))
79636caad3618e Petr Tesarik 2023-08-01  644  			gfp = (gfp & ~__GFP_DMA32) | __GFP_DMA;
79636caad3618e Petr Tesarik 2023-08-01  645  		else
79636caad3618e Petr Tesarik 2023-08-01  646  			return NULL;
79636caad3618e Petr Tesarik 2023-08-01  647  	}
79636caad3618e Petr Tesarik 2023-08-01  648  
79636caad3618e Petr Tesarik 2023-08-01  649  	return page;
79636caad3618e Petr Tesarik 2023-08-01  650  }
79636caad3618e Petr Tesarik 2023-08-01  651  

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

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