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DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1662412018; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1P0OL5eJBC/VWyzrUzzXy/PpMlaQ+HYTExB/Z4qpTio=; b=c7RNoemtm3886h57GZrb9bp9dbKY8BHyEdLoeGuTV6OWHu8zVRr6CV9DDfuLM4RSCgdRfk pUa2nCKCnLBEPBYUjz7IW1G0iZTUHAdOnMmJq3qasZPugDW3kQ/p3aTp/w+tMgJzyxB9qs LY1+XUr2FejQDPa3UE140sEFXPXpBYI= From: andrey.konovalov@linux.dev To: Andrew Morton Cc: Andrey Konovalov , Marco Elver , Alexander Potapenko , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, Peter Collingbourne , Evgenii Stepanov , Florian Mayer , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH mm v3 07/34] kasan: introduce kasan_get_alloc_track Date: Mon, 5 Sep 2022 23:05:22 +0200 Message-Id: <0c365a35f4a833fff46f9d42c3212b32f7166556.1662411799.git.andreyknvl@google.com> In-Reply-To: References: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1662412019; a=rsa-sha256; cv=none; b=UOfoI2pmOvXepq+gT15mG2Pd3YZRa0mI2HYcRgLmmOfyz133Ejaghu1xWjPH9VipHx6hMp rpNZRoVhiS+uzZXD+ijxT4LYTOFCOwA3G9V1R1PGDAVfKRWw3kemt7541YlR1Axk9IBniM kQfmTHkBGch4Q/B9k3HTP9FWkLYvn7Q= ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=c7RNoemt; spf=pass (imf10.hostedemail.com: domain of andrey.konovalov@linux.dev designates 94.23.1.103 as permitted sender) smtp.mailfrom=andrey.konovalov@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1662412019; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=1P0OL5eJBC/VWyzrUzzXy/PpMlaQ+HYTExB/Z4qpTio=; b=BgE7Yq+8OaBxQMf3TS7yxdNO572o71dexqb7k1HxnUx2SnCO6iEYD2EOSQOdCpNn8JESsN cbUSSKrLbk4KcaJT2K5dL6ogBTZrKsGoLH696bXkZQHKc/ST+DVpp90ZFQZqoQrYDWwY2j rxLq0ahk9weY2H/4gtH8oWrxUrQA9DE= Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=c7RNoemt; spf=pass (imf10.hostedemail.com: domain of andrey.konovalov@linux.dev designates 94.23.1.103 as permitted sender) smtp.mailfrom=andrey.konovalov@linux.dev; dmarc=pass (policy=none) header.from=linux.dev X-Rspamd-Server: rspam12 X-Stat-Signature: wn4f9dzfengaipha3iy1dnuum8dcb5s8 X-Rspamd-Queue-Id: 7A42BC0063 X-Rspam-User: X-HE-Tag: 1662412019-911789 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Andrey Konovalov Add a kasan_get_alloc_track() helper that fetches alloc_track for a slab object and use this helper in the common reporting code. For now, the implementations of this helper are the same for the Generic and tag-based modes, but they will diverge later in the series. This change hides references to alloc_meta from the common reporting code. This is desired as only the Generic mode will be using per-object metadata after this series. Reviewed-by: Marco Elver Signed-off-by: Andrey Konovalov --- mm/kasan/generic.c | 14 +++++++++++++- mm/kasan/kasan.h | 4 +++- mm/kasan/report.c | 8 ++++---- mm/kasan/tags.c | 14 +++++++++++++- 4 files changed, 33 insertions(+), 7 deletions(-) diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c index 98c451a3b01f..f212b9ae57b5 100644 --- a/mm/kasan/generic.c +++ b/mm/kasan/generic.c @@ -381,8 +381,20 @@ void kasan_save_free_info(struct kmem_cache *cache, *(u8 *)kasan_mem_to_shadow(object) = KASAN_SLAB_FREETRACK; } +struct kasan_track *kasan_get_alloc_track(struct kmem_cache *cache, + void *object) +{ + struct kasan_alloc_meta *alloc_meta; + + alloc_meta = kasan_get_alloc_meta(cache, object); + if (!alloc_meta) + return NULL; + + return &alloc_meta->alloc_track; +} + struct kasan_track *kasan_get_free_track(struct kmem_cache *cache, - void *object, u8 tag) + void *object, u8 tag) { if (*(u8 *)kasan_mem_to_shadow(object) != KASAN_SLAB_FREETRACK) return NULL; diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index 30ff341b6d35..b65a51349c51 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -283,8 +283,10 @@ depot_stack_handle_t kasan_save_stack(gfp_t flags, bool can_alloc); void kasan_set_track(struct kasan_track *track, gfp_t flags); void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags); void kasan_save_free_info(struct kmem_cache *cache, void *object, u8 tag); +struct kasan_track *kasan_get_alloc_track(struct kmem_cache *cache, + void *object); struct kasan_track *kasan_get_free_track(struct kmem_cache *cache, - void *object, u8 tag); + void *object, u8 tag); #if defined(CONFIG_KASAN_GENERIC) && \ (defined(CONFIG_SLAB) || defined(CONFIG_SLUB)) diff --git a/mm/kasan/report.c b/mm/kasan/report.c index cd9f5c7fc6db..5d225d7d9c4c 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -255,12 +255,12 @@ static void describe_object_addr(struct kmem_cache *cache, void *object, static void describe_object_stacks(struct kmem_cache *cache, void *object, const void *addr, u8 tag) { - struct kasan_alloc_meta *alloc_meta; + struct kasan_track *alloc_track; struct kasan_track *free_track; - alloc_meta = kasan_get_alloc_meta(cache, object); - if (alloc_meta) { - print_track(&alloc_meta->alloc_track, "Allocated"); + alloc_track = kasan_get_alloc_track(cache, object); + if (alloc_track) { + print_track(alloc_track, "Allocated"); pr_err("\n"); } diff --git a/mm/kasan/tags.c b/mm/kasan/tags.c index e0e5de8ce834..7b1fc8e7c99c 100644 --- a/mm/kasan/tags.c +++ b/mm/kasan/tags.c @@ -38,8 +38,20 @@ void kasan_save_free_info(struct kmem_cache *cache, kasan_set_track(&alloc_meta->free_track, GFP_NOWAIT); } +struct kasan_track *kasan_get_alloc_track(struct kmem_cache *cache, + void *object) +{ + struct kasan_alloc_meta *alloc_meta; + + alloc_meta = kasan_get_alloc_meta(cache, object); + if (!alloc_meta) + return NULL; + + return &alloc_meta->alloc_track; +} + struct kasan_track *kasan_get_free_track(struct kmem_cache *cache, - void *object, u8 tag) + void *object, u8 tag) { struct kasan_alloc_meta *alloc_meta;