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Message-ID: <138da3e5-0e24-41a6-bb35-df5d07045eb3@embeddedor.com>
Date: Thu, 1 Aug 2024 06:47:58 -0600
From: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To: kernel test robot <lkp@...el.com>,
 "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
 LKML <linux-kernel@...r.kernel.org>
Subject: Re: [gustavoars:testing/wfamnae-next20240729-cbc-2 11/18]
 include/rdma/uverbs_ioctl.h:643:15: error: static assertion failed due to
 requirement '__builtin_offsetof(struct uverbs_attr_bundle, attrs) ==
 sizeof(struct uverbs_attr_bundle_hdr)': struct member likely outside of
 struct_group_tagged()



On 01/08/24 05:35, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/wfamnae-next20240729-cbc-2
> head:   df15c862c1b93b6e1f6c90b0d7971f7a6ad66751
> commit: e7cd9f429a852fb7e37a706c7d08fc36e7863e06 [11/18] RDMA/uverbs: Use static_assert() to check struct sizes
> config: hexagon-randconfig-001-20240801 (https://download.01.org/0day-ci/archive/20240801/202408011956.wscyBwq6-lkp@intel.com/config)
> compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 430b90f04533b099d788db2668176038be38c53b)


Clang 20.0.0?? (thinkingface)

--
Gustavo

> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240801/202408011956.wscyBwq6-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/202408011956.wscyBwq6-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>     In file included from drivers/infiniband/core/ib_core_uverbs.c:8:
>     In file included from drivers/infiniband/core/uverbs.h:46:
>     In file included from include/rdma/ib_verbs.h:15:
>     In file included from include/linux/ethtool.h:18:
>     In file included from include/linux/if_ether.h:19:
>     In file included from include/linux/skbuff.h:17:
>     In file included from include/linux/bvec.h:10:
>     In file included from include/linux/highmem.h:10:
>     In file included from include/linux/mm.h:2228:
>     include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
>       514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
>           |                               ~~~~~~~~~~~ ^ ~~~
>     In file included from drivers/infiniband/core/ib_core_uverbs.c:8:
>     In file included from drivers/infiniband/core/uverbs.h:46:
>     In file included from include/rdma/ib_verbs.h:15:
>     In file included from include/linux/ethtool.h:18:
>     In file included from include/linux/if_ether.h:19:
>     In file included from include/linux/skbuff.h:17:
>     In file included from include/linux/bvec.h:10:
>     In file included from include/linux/highmem.h:12:
>     In file included from include/linux/hardirq.h:11:
>     In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
>     In file included from include/asm-generic/hardirq.h:17:
>     In file included from include/linux/irq.h:20:
>     In file included from include/linux/io.h:14:
>     In file included from arch/hexagon/include/asm/io.h:328:
>     include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>       548 |         val = __raw_readb(PCI_IOBASE + addr);
>           |                           ~~~~~~~~~~ ^
>     include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>       561 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
>           |                                                         ~~~~~~~~~~ ^
>     include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
>        37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
>           |                                                   ^
>     In file included from drivers/infiniband/core/ib_core_uverbs.c:8:
>     In file included from drivers/infiniband/core/uverbs.h:46:
>     In file included from include/rdma/ib_verbs.h:15:
>     In file included from include/linux/ethtool.h:18:
>     In file included from include/linux/if_ether.h:19:
>     In file included from include/linux/skbuff.h:17:
>     In file included from include/linux/bvec.h:10:
>     In file included from include/linux/highmem.h:12:
>     In file included from include/linux/hardirq.h:11:
>     In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
>     In file included from include/asm-generic/hardirq.h:17:
>     In file included from include/linux/irq.h:20:
>     In file included from include/linux/io.h:14:
>     In file included from arch/hexagon/include/asm/io.h:328:
>     include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>       574 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
>           |                                                         ~~~~~~~~~~ ^
>     include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
>        35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
>           |                                                   ^
>     In file included from drivers/infiniband/core/ib_core_uverbs.c:8:
>     In file included from drivers/infiniband/core/uverbs.h:46:
>     In file included from include/rdma/ib_verbs.h:15:
>     In file included from include/linux/ethtool.h:18:
>     In file included from include/linux/if_ether.h:19:
>     In file included from include/linux/skbuff.h:17:
>     In file included from include/linux/bvec.h:10:
>     In file included from include/linux/highmem.h:12:
>     In file included from include/linux/hardirq.h:11:
>     In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
>     In file included from include/asm-generic/hardirq.h:17:
>     In file included from include/linux/irq.h:20:
>     In file included from include/linux/io.h:14:
>     In file included from arch/hexagon/include/asm/io.h:328:
>     include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>       585 |         __raw_writeb(value, PCI_IOBASE + addr);
>           |                             ~~~~~~~~~~ ^
>     include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>       595 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
>           |                                                       ~~~~~~~~~~ ^
>     include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>       605 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
>           |                                                       ~~~~~~~~~~ ^
>     In file included from drivers/infiniband/core/ib_core_uverbs.c:8:
>     In file included from drivers/infiniband/core/uverbs.h:49:
>     In file included from include/rdma/uverbs_std_types.h:10:
>>> include/rdma/uverbs_ioctl.h:643:15: error: static assertion failed due to requirement '__builtin_offsetof(struct uverbs_attr_bundle, attrs) == sizeof(struct uverbs_attr_bundle_hdr)': struct member likely outside of struct_group_tagged()
>       643 | static_assert(offsetof(struct uverbs_attr_bundle, attrs) == sizeof(struct uverbs_attr_bundle_hdr),
>           | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>       644 |               "struct member likely outside of struct_group_tagged()");
>           |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>     include/linux/stddef.h:16:32: note: expanded from macro 'offsetof'
>        16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
>           |                                 ^
>     include/linux/build_bug.h:77:50: note: expanded from macro 'static_assert'
>        77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
>           |                                  ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
>     include/linux/build_bug.h:78:56: note: expanded from macro '__static_assert'
>        78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
>           |                                                        ^~~~
>     include/rdma/uverbs_ioctl.h:643:58: note: expression evaluates to '56 == 52'
>       643 | static_assert(offsetof(struct uverbs_attr_bundle, attrs) == sizeof(struct uverbs_attr_bundle_hdr),
>           | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>       644 |               "struct member likely outside of struct_group_tagged()");
>           |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>     include/linux/build_bug.h:77:50: note: expanded from macro 'static_assert'
>        77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
>           |                                  ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
>     include/linux/build_bug.h:78:56: note: expanded from macro '__static_assert'
>        78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
>           |                                                        ^~~~
>     7 warnings and 1 error generated.
> 
> 
> vim +643 include/rdma/uverbs_ioctl.h
> 
>     630	
>     631	struct uverbs_attr_bundle {
>     632		/* New members MUST be added within the struct_group() macro below. */
>     633		struct_group_tagged(uverbs_attr_bundle_hdr, hdr,
>     634			struct ib_udata driver_udata;
>     635			struct ib_udata ucore;
>     636			struct ib_uverbs_file *ufile;
>     637			struct ib_ucontext *context;
>     638			struct ib_uobject *uobject;
>     639			DECLARE_BITMAP(attr_present, UVERBS_API_ATTR_BKEY_LEN);
>     640		);
>     641		struct uverbs_attr attrs[];
>     642	};
>   > 643	static_assert(offsetof(struct uverbs_attr_bundle, attrs) == sizeof(struct uverbs_attr_bundle_hdr),
>     644		      "struct member likely outside of struct_group_tagged()");
>     645	
> 

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