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t=1781239499; bh=b00TklBGecqQHLra7PJTRi5mE5kXZpjh3sOy2Gf7YPQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q+ywobdJtIBtiIj1Lm87NJAvMg5U5ZyPO3GOiZE5j7oUMWa2LPjn5dzWP/UcvIfsR eAIppw1XHah98pdVj9WRrylHYixsfy899jM7BhUXauI0syxEiAplt27uUuk/UZ4Tct 1rn0H7QLZBrriUcOjns9J7XKs7UrCuhBG1BRs4Wk= From: Dev Jain To: ryabinin.a.a@gmail.com, akpm@linux-foundation.org, corbet@lwn.net Cc: Dev Jain , glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, skhan@linuxfoundation.org, workflows@vger.kernel.org, linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ryan.roberts@arm.com, anshuman.khandual@arm.com, kaleshsingh@google.com, 21cnbao@gmail.com, david@kernel.org, will@kernel.org, catalin.marinas@arm.com Subject: [RFC PATCH 1/2] kasan: hw_tags: Use KASAN_PAGE_REDZONE for vmalloc redzoning Date: Fri, 12 Jun 2026 04:44:23 +0000 Message-ID: <20260612044425.763060-2-dev.jain@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260612044425.763060-1-dev.jain@arm.com> References: <20260612044425.763060-1-dev.jain@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: C2B42140006 X-Stat-Signature: rora5iazebqgsuoahw95cpfe97gn3znj X-Rspam-User: X-HE-Tag: 1781239500-840396 X-HE-Meta: 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 T4AwCPVv UrfZN/IoFgjoMvkvVK0+ED1zghYHbdrNFgW9mVfH41638cHeZDTxciY7ZOca2WH9WEyjwk03Mxnp1zeYRBsOOkenGTCvUpli3c0OBUZvUUcQHauZ2NrwOOMwOm4d4SmUsDYr1U3OW4UFoZWjtJkUviyT0WSg5/2lBJbbH00iInLzrDijo83rJrcJm+6z+MDxhJX95P5qGLi7ySqZX64RADDcBOHa0OJ/IgnyVCf/lV9AvbVo44NsZvN7Zc2q8mWyZm3eOgbBSHQLDOgSJEW+PuQhwQAKDC1dPr90X17s8XQvf++wa5mLnQuOtmFcWs+awFzMk9b0dnjfOOYA082PfiPV3OBIamJb1wxqX79ec9wwZqRs= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: In preparation for adding "tag only on alloc" boot time option, use KASAN_PAGE_REDZONE instead of KASAN_TAG_INVALID for poisoning the tail end of the vmalloc allocation. Although both values are the same for hw tags, KASAN_SLAB_REDZONE is used for poisoning the tail end of a kmalloc object allocation, so maintain the pattern. Signed-off-by: Dev Jain --- mm/kasan/hw_tags.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c index cbef5e450954e..c1a2b48808ed7 100644 --- a/mm/kasan/hw_tags.c +++ b/mm/kasan/hw_tags.c @@ -375,7 +375,7 @@ void *__kasan_unpoison_vmalloc(const void *start, unsigned long size, redzone_start = round_up((unsigned long)start + size, KASAN_GRANULE_SIZE); redzone_size = round_up(redzone_start, PAGE_SIZE) - redzone_start; - kasan_poison((void *)redzone_start, redzone_size, KASAN_TAG_INVALID, + kasan_poison((void *)redzone_start, redzone_size, KASAN_PAGE_REDZONE, flags & KASAN_VMALLOC_INIT); /* -- 2.43.0