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Tue, 19 Sep 2023 20:55:25 +0000 Date: Wed, 20 Sep 2023 04:55:05 +0800 From: kernel test robot To: Jeffrey Hugo Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Jacek Lawrynowicz , Carl Vanderlip , Pranjal Ramajor Asha Kanojiya , Stanislaw Gruszka Subject: drivers/accel/qaic/qaic_control.c:348:17: warning: array subscript 'struct wrapper_msg[0]' is partly outside array bounds of 'unsigned char[44]' Message-ID: <202309200403.mGPrZFN4-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Jeffrey, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 2cf0f715623872823a72e451243bbf555d10d032 commit: 759662e4f1f8cd6ea0ec466e10cf29fe7c1fec36 accel/qaic: Add qaic driver to the build system date: 6 months ago config: i386-randconfig-i015-20230718 (https://download.01.org/0day-ci/archive/20230920/202309200403.mGPrZFN4-lkp@intel.com/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230920/202309200403.mGPrZFN4-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202309200403.mGPrZFN4-lkp@intel.com/ All warnings (new ones prefixed by >>): In function 'add_wrapper', inlined from 'abort_dma_cont' at drivers/accel/qaic/qaic_control.c:1107:12, inlined from 'qaic_manage_msg_xfer' at drivers/accel/qaic/qaic_control.c:1165:9: >> drivers/accel/qaic/qaic_control.c:348:17: warning: array subscript 'struct wrapper_msg[0]' is partly outside array bounds of 'unsigned char[44]' [-Warray-bounds] 348 | w->head = wrappers; | ~~~~~~~~^~~~~~~~~~ In file included from include/linux/fs.h:45, from include/linux/huge_mm.h:8, from include/linux/mm.h:855, from include/linux/scatterlist.h:8, from include/linux/dma-mapping.h:10, from drivers/accel/qaic/qaic_control.c:10: In function 'kmalloc', inlined from 'kzalloc' at include/linux/slab.h:720:9, inlined from 'add_wrapper' at drivers/accel/qaic/qaic_control.c:342:26, inlined from 'abort_dma_cont' at drivers/accel/qaic/qaic_control.c:1107:12, inlined from 'qaic_manage_msg_xfer' at drivers/accel/qaic/qaic_control.c:1165:9: include/linux/slab.h:580:24: note: object of size 44 allocated by 'kmalloc_trace' 580 | return kmalloc_trace( | ^~~~~~~~~~~~~~ 581 | kmalloc_caches[kmalloc_type(flags)][index], | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 582 | flags, size); | ~~~~~~~~~~~~ In function 'abort_dma_cont', inlined from 'qaic_manage_msg_xfer' at drivers/accel/qaic/qaic_control.c:1165:9: drivers/accel/qaic/qaic_control.c:1121:22: warning: array subscript 'struct wrapper_msg[0]' is partly outside array bounds of 'unsigned char[44]' [-Warray-bounds] 1121 | wrapper->len = size; | ~~~~~~~~~~~~~^~~~~~ In function 'kmalloc', inlined from 'kzalloc' at include/linux/slab.h:720:9, inlined from 'add_wrapper' at drivers/accel/qaic/qaic_control.c:342:26, inlined from 'abort_dma_cont' at drivers/accel/qaic/qaic_control.c:1107:12, inlined from 'qaic_manage_msg_xfer' at drivers/accel/qaic/qaic_control.c:1165:9: include/linux/slab.h:580:24: note: object of size 44 allocated by 'kmalloc_trace' 580 | return kmalloc_trace( | ^~~~~~~~~~~~~~ 581 | kmalloc_caches[kmalloc_type(flags)][index], | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 582 | flags, size); | ~~~~~~~~~~~~ vim +348 drivers/accel/qaic/qaic_control.c 129776ac2e3823 Jeffrey Hugo 2023-03-27 339 129776ac2e3823 Jeffrey Hugo 2023-03-27 340 static struct wrapper_msg *add_wrapper(struct wrapper_list *wrappers, u32 size) 129776ac2e3823 Jeffrey Hugo 2023-03-27 341 { 129776ac2e3823 Jeffrey Hugo 2023-03-27 342 struct wrapper_msg *w = kzalloc(size, GFP_KERNEL); 129776ac2e3823 Jeffrey Hugo 2023-03-27 343 129776ac2e3823 Jeffrey Hugo 2023-03-27 344 if (!w) 129776ac2e3823 Jeffrey Hugo 2023-03-27 345 return NULL; 129776ac2e3823 Jeffrey Hugo 2023-03-27 346 list_add_tail(&w->list, &wrappers->list); 129776ac2e3823 Jeffrey Hugo 2023-03-27 347 kref_init(&w->ref_count); 129776ac2e3823 Jeffrey Hugo 2023-03-27 @348 w->head = wrappers; 129776ac2e3823 Jeffrey Hugo 2023-03-27 349 return w; 129776ac2e3823 Jeffrey Hugo 2023-03-27 350 } 129776ac2e3823 Jeffrey Hugo 2023-03-27 351 :::::: The code at line 348 was first introduced by commit :::::: 129776ac2e38231fa9c02ce20e116c99de291666 accel/qaic: Add control path :::::: TO: Jeffrey Hugo :::::: CC: Jacek Lawrynowicz -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki