+ lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-4.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: lib: fix alloc_tag_init() to prevent passing NULL to PTR_ERR()
has been added to the -mm mm-unstable branch.  Its filename is
     lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-4.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-4.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Suren Baghdasaryan <surenb@google.com>
Subject: lib: fix alloc_tag_init() to prevent passing NULL to PTR_ERR()
Date: Tue, 16 Apr 2024 17:33:49 -0700

codetag_register_type() never returns NULL, yet IS_ERR_OR_NULL() is used
to check its return value.  This leads to a warning about possibility of
passing NULL to PTR_ERR().  Fix that by using IS_ERR() to exclude NULL.

Link: https://lkml.kernel.org/r/20240417003349.2520094-1-surenb@google.com
Fixes: 6e8a230a6b1a ("lib: add allocation tagging support for memory allocation profiling")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202404051340.7Wo7oiJ5-lkp@intel.com/
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/alloc_tag.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/alloc_tag.c~lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-4
+++ a/lib/alloc_tag.c
@@ -141,7 +141,7 @@ static int __init alloc_tag_init(void)
 	};
 
 	alloc_tag_cttype = codetag_register_type(&desc);
-	if (IS_ERR_OR_NULL(alloc_tag_cttype))
+	if (IS_ERR(alloc_tag_cttype))
 		return PTR_ERR(alloc_tag_cttype);
 
 	register_sysctl_init("vm", memory_allocation_profiling_sysctls);
_

Patches currently in -mm which might be from surenb@google.com are

fix-missing-vmalloch-includes-fix-2.patch
fix-missing-vmalloch-includes-fix-6.patch
mm-introduce-slabobj_ext-to-support-slab-object-extensions.patch
mm-introduce-__gfp_no_obj_ext-flag-to-selectively-prevent-slabobj_ext-creation.patch
mm-slab-introduce-slab_no_obj_ext-to-avoid-obj_ext-creation.patch
slab-objext-introduce-objext_flags-as-extension-to-page_memcg_data_flags.patch
lib-code-tagging-framework.patch
lib-code-tagging-module-support.patch
lib-prevent-module-unloading-if-memory-is-not-freed.patch
lib-add-allocation-tagging-support-for-memory-allocation-profiling.patch
lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix.patch
lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-2.patch
lib-add-allocation-tagging-support-for-memory-allocation-profiling-fix-4.patch
lib-introduce-support-for-page-allocation-tagging.patch
lib-introduce-early-boot-parameter-to-avoid-page_ext-memory-overhead.patch
mm-percpu-increase-percpu_module_reserve-to-accommodate-allocation-tags.patch
mm-percpu-increase-percpu_module_reserve-to-accommodate-allocation-tags-fix.patch
change-alloc_pages-name-in-dma_map_ops-to-avoid-name-conflicts.patch
mm-enable-page-allocation-tagging.patch
mm-enable-page-allocation-tagging-fix.patch
mm-create-new-codetag-references-during-page-splitting.patch
mm-fix-non-compound-multi-order-memory-accounting-in-__free_pages.patch
mm-page_ext-enable-early_page_ext-when-config_mem_alloc_profiling_debug=y.patch
lib-add-codetag-reference-into-slabobj_ext.patch
mm-slab-add-allocation-accounting-into-slab-allocation-and-free-paths.patch
mm-slab-enable-slab-allocation-tagging-for-kmalloc-and-friends.patch
mm-slab-enable-slab-allocation-tagging-for-kmalloc-and-friends-fix.patch
mempool-hook-up-to-memory-allocation-profiling-fix.patch
mempool-hook-up-to-memory-allocation-profiling-fix-2.patch
mm-percpu-enable-per-cpu-allocation-tagging.patch
mm-percpu-enable-per-cpu-allocation-tagging-fix.patch
mm-vmalloc-enable-memory-allocation-profiling-fix.patch
mm-vmalloc-enable-memory-allocation-profiling-fix-2.patch
rhashtable-plumb-through-alloc-tag-fix.patch
lib-add-memory-allocations-report-in-show_mem.patch
codetag-debug-skip-objext-checking-when-its-for-objext-itself.patch
codetag-debug-mark-codetags-for-reserved-pages-as-empty.patch
codetag-debug-introduce-objexts_alloc_fail-to-mark-failed-slab_ext-allocations.patch
mm-change-inlined-allocation-helpers-to-account-at-the-call-site.patch
userfaultfd-remove-write_once-when-setting-folio-index-during-uffdio_move.patch