From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 52286ECC for ; Wed, 20 Dec 2023 00:05:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="l/90J7rF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC6F7C433C7; Wed, 20 Dec 2023 00:05:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1703030729; bh=T8p3HxTTFUQECwVw5ydPCQxG82JE8nTy9YerpKxb9ag=; h=Date:To:From:Subject:From; b=l/90J7rFdyI7UDX9cmVx8gx/6FrTZsaXHtVESoTWtca40IGBbpuCT8iVExkIwbFbJ cUzT5Gq0lYmc5sTFSv2yXk2rABNE/iV1Klo2cs7/JzW8S85610U+wYLjwj8QGqQfbH TfwcuI7qdReuv1JL/LEDnh3PI7nBlk5+XZNKVkMU= Date: Tue, 19 Dec 2023 16:05:29 -0800 To: mm-commits@vger.kernel.org,ryabinin.a.a@gmail.com,leitao@debian.org,glider@google.com,eugenis@google.com,elver@google.com,dvyukov@google.com,alobakin@pm.me,andreyknvl@google.com,akpm@linux-foundation.org From: Andrew Morton Subject: + kasan-document-kasan_mempool_poison_object.patch added to mm-unstable branch Message-Id: <20231220000529.AC6F7C433C7@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: kasan: document kasan_mempool_poison_object has been added to the -mm mm-unstable branch. Its filename is kasan-document-kasan_mempool_poison_object.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kasan-document-kasan_mempool_poison_object.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: Andrey Konovalov Subject: kasan: document kasan_mempool_poison_object Date: Tue, 19 Dec 2023 23:28:47 +0100 Add documentation comment for kasan_mempool_poison_object. Link: https://lkml.kernel.org/r/af33ba8cabfa1ad731fe23a3f874bfc8d3b7fed4.1703024586.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Cc: Alexander Lobakin Cc: Alexander Potapenko Cc: Andrey Ryabinin Cc: Breno Leitao Cc: Dmitry Vyukov Cc: Evgenii Stepanov Cc: Marco Elver Signed-off-by: Andrew Morton --- include/linux/kasan.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) --- a/include/linux/kasan.h~kasan-document-kasan_mempool_poison_object +++ a/include/linux/kasan.h @@ -213,6 +213,24 @@ static __always_inline void * __must_che } void __kasan_mempool_poison_object(void *ptr, unsigned long ip); +/** + * kasan_mempool_poison_object - Check and poison a mempool slab allocation. + * @ptr: Pointer to the slab allocation. + * + * This function is intended for kernel subsystems that cache slab allocations + * to reuse them instead of freeing them back to the slab allocator (e.g. + * mempool). + * + * This function poisons a slab allocation without initializing its memory and + * without putting it into the quarantine (for the Generic mode). + * + * This function also performs checks to detect double-free and invalid-free + * bugs and reports them. + * + * This function operates on all slab allocations including large kmalloc + * allocations (the ones returned by kmalloc_large() or by kmalloc() with the + * size > KMALLOC_MAX_SIZE). + */ static __always_inline void kasan_mempool_poison_object(void *ptr) { if (kasan_enabled()) _ Patches currently in -mm which might be from andreyknvl@google.com are kasan-rename-kasan_slab_free_mempool-to-kasan_mempool_poison_object.patch kasan-move-kasan_mempool_poison_object.patch kasan-document-kasan_mempool_poison_object.patch kasan-add-return-value-for-kasan_mempool_poison_object.patch kasan-introduce-kasan_mempool_unpoison_object.patch kasan-introduce-kasan_mempool_poison_pages.patch kasan-introduce-kasan_mempool_unpoison_pages.patch kasan-clean-up-__kasan_mempool_poison_object.patch kasan-save-free-stack-traces-for-slab-mempools.patch kasan-clean-up-and-rename-____kasan_kmalloc.patch kasan-introduce-poison_kmalloc_large_redzone.patch kasan-save-alloc-stack-traces-for-mempool.patch mempool-skip-slub_debug-poisoning-when-kasan-is-enabled.patch mempool-use-new-mempool-kasan-hooks.patch mempool-introduce-mempool_use_prealloc_only.patch kasan-add-mempool-tests.patch kasan-rename-pagealloc-tests.patch kasan-reorder-tests.patch kasan-rename-and-document-kasan_unpoison_object_data.patch skbuff-use-mempool-kasan-hooks.patch io_uring-use-mempool-kasan-hook.patch