drivers/gpu/drm/xe/xe_guc_ct.c:117:11-20: ERROR: __cleanup(kfree) will cause an invalid free: the stack address of the annotated variable will be passed to kfree; declare the variable using __free(kfree) to cause the pointee to be freed

drivers/gpu/drm/xe/xe_guc_ct.c:117:11-20: ERROR: __cleanup(kfree) will cause an invalid free: the stack address of the annotated variable will be passed to kfree; declare the variable using __free(kfree) to cause the pointee to be freed

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
CC: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d48723711bae9b8cdc56719c448ba42fef28cbee
commit: ea944d57eac746f9bd9056134751708c48084207 drm/xe/guc_ct: Cleanup ifdef'ry
date:   12 months ago
:::::: branch date: 17 hours ago
:::::: commit date: 12 months ago
config: i386-randconfig-2104-20261107 (https://download.01.org/0day-ci/archive/20261107/202611071504.Sfm2Y3U5-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0

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
| Fixes: ea944d57eac7 ("drm/xe/guc_ct: Cleanup ifdef'ry")
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Julia Lawall <julia.lawall@inria.fr>
| Closes: https://lore.kernel.org/r/202611071504.Sfm2Y3U5-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/xe/xe_guc_ct.c:117:11-20: ERROR: __cleanup(kfree) will cause an invalid free: the stack address of the annotated variable will be passed to kfree; declare the variable using __free(kfree) to cause the pointee to be freed

vim +117 drivers/gpu/drm/xe/xe_guc_ct.c

ea944d57eac746f Lucas De Marchi 2025-11-19  112  
ea944d57eac746f Lucas De Marchi 2025-11-19  113  static void fast_req_dump(struct xe_guc_ct *ct, u16 fence, unsigned int slot)
ea944d57eac746f Lucas De Marchi 2025-11-19  114  {
ea944d57eac746f Lucas De Marchi 2025-11-19  115  	struct xe_gt *gt = ct_to_gt(ct);
ea944d57eac746f Lucas De Marchi 2025-11-19  116  #if IS_ENABLED(CONFIG_DRM_XE_DEBUG_GUC)
ea944d57eac746f Lucas De Marchi 2025-11-19 @117  	char *buf __cleanup(kfree) = kmalloc(SZ_4K, GFP_NOWAIT);
ea944d57eac746f Lucas De Marchi 2025-11-19  118  
ea944d57eac746f Lucas De Marchi 2025-11-19  119  	if (buf && stack_depot_snprint(ct->fast_req[slot].stack, buf, SZ_4K, 0))
ea944d57eac746f Lucas De Marchi 2025-11-19  120  		xe_gt_err(gt, "Fence 0x%x was used by action %#04x sent at:\n%s\n",
ea944d57eac746f Lucas De Marchi 2025-11-19  121  			  fence, ct->fast_req[slot].action, buf);
ea944d57eac746f Lucas De Marchi 2025-11-19  122  	else
ea944d57eac746f Lucas De Marchi 2025-11-19  123  		xe_gt_err(gt, "Fence 0x%x was used by action %#04x [failed to retrieve stack]\n",
ea944d57eac746f Lucas De Marchi 2025-11-19  124  			  fence, ct->fast_req[slot].action);
ea944d57eac746f Lucas De Marchi 2025-11-19  125  #else
ea944d57eac746f Lucas De Marchi 2025-11-19  126  	xe_gt_err(gt, "Fence 0x%x was used by action %#04x\n",
ea944d57eac746f Lucas De Marchi 2025-11-19  127  		  fence, ct->fast_req[slot].action);
ea944d57eac746f Lucas De Marchi 2025-11-19  128  #endif
ea944d57eac746f Lucas De Marchi 2025-11-19  129  }
ea944d57eac746f Lucas De Marchi 2025-11-19  130  

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