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From: Hyeonggon Yoo <42.hyeyoo@gmail.com>
To: Christoph Lameter <cl@gentwo.de>
Cc: Vlastimil Babka <vbabka@suse.cz>, Marco Elver <elver@google.com>,
	Matthew WilCox <willy@infradead.org>,
	Pekka Enberg <penberg@kernel.org>,
	David Rientjes <rientjes@google.com>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Roman Gushchin <roman.gushchin@linux.dev>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 23/23] mm/sl[au]b: check if large object is valid in __ksize()
Date: Thu, 14 Apr 2022 20:46:54 +0900	[thread overview]
Message-ID: <YlgJrjDcfQDKqHym@hyeyoo> (raw)
In-Reply-To: <alpine.DEB.2.22.394.2204141156160.690844@gentwo.de>

On Thu, Apr 14, 2022 at 11:58:01AM +0200, Christoph Lameter wrote:
> On Thu, 14 Apr 2022, Hyeonggon Yoo wrote:
> 
> > If address of large object is not beginning of folio or size of
> > the folio is too small, it must be invalid. Return zero in such cases.
> 
> This looks like a slab usage error on the part of the caller that would
> benefit from a kernel log entry. A warning or an error?


I think a WARN_ON() would be sufficient. here, will do in v3.
Thanks!

-- 
Thanks,
Hyeonggon


  reply	other threads:[~2022-04-14 11:47 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-14  8:57 [PATCH v2 00/23] common kmalloc for SLUB and SLAB v2 Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 01/23] mm/slab: move NUMA-related code to __do_cache_alloc() Hyeonggon Yoo
2022-04-22 18:04   ` Vlastimil Babka
2022-04-14  8:57 ` [PATCH v2 02/23] mm/slab: cleanup slab_alloc() and slab_alloc_node() Hyeonggon Yoo
2022-04-25 14:05   ` Vlastimil Babka
2022-04-14  8:57 ` [PATCH v2 03/23] mm/slab_common: remove CONFIG_NUMA ifdefs for common kmalloc functions Hyeonggon Yoo
2022-04-25 14:41   ` Vlastimil Babka
2022-04-14  8:57 ` [PATCH v2 04/23] mm/slab_common: cleanup kmalloc_track_caller() Hyeonggon Yoo
2022-04-25 15:05   ` Vlastimil Babka
2022-04-26 15:49   ` Vlastimil Babka
2022-04-30 11:44     ` Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 05/23] mm/slab_common: cleanup __kmalloc() Hyeonggon Yoo
2022-04-26 16:02   ` Vlastimil Babka
2022-04-14  8:57 ` [PATCH v2 06/23] mm/sl[auo]b: fold kmalloc_order_trace() into kmalloc_large() Hyeonggon Yoo
2022-04-26 16:09   ` Vlastimil Babka
2022-04-14  8:57 ` [PATCH v2 07/23] mm/slub: move kmalloc_large_node() to slab_common.c Hyeonggon Yoo
2022-04-26 16:13   ` Vlastimil Babka
2022-04-14  8:57 ` [PATCH v2 09/23] mm/slab_common: cleanup kmalloc_large() Hyeonggon Yoo
2022-04-26 17:18   ` Vlastimil Babka
2022-04-14  8:57 ` [PATCH v2 10/23] mm/slab_common: cleanup kmem_cache_alloc{,node,lru} Hyeonggon Yoo
2022-04-26 18:01   ` Vlastimil Babka
2022-04-30 11:48     ` Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 11/23] mm/slab_common: kmalloc_node: pass large requests to page allocator Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 12/23] mm/slab_common: cleanup kmalloc() Hyeonggon Yoo
2022-04-26 18:00   ` Joe Perches
2022-04-28 11:30     ` Hyeonggon Yoo
2022-04-27  7:50   ` Vlastimil Babka
2022-04-14  8:57 ` [PATCH v2 13/23] mm/slab: kmalloc: pass requests larger than order-1 page to page allocator Hyeonggon Yoo
2022-04-27  8:10   ` Vlastimil Babka
2022-04-30 11:50     ` Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 14/23] mm/slab_common: print cache name in tracepoints Hyeonggon Yoo
2022-04-29 14:05   ` Vlastimil Babka
2022-04-30 14:06     ` Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 15/23] mm/slab_common: use same tracepoint in kmalloc and normal caches Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 16/23] mm/slab_common: rename tracepoint Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 17/23] mm/slab_common: implement __kmem_cache_free() Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 18/23] mm/sl[au]b: generalize kmalloc subsystem Hyeonggon Yoo
2022-04-29 14:30   ` Vlastimil Babka
2022-04-14  8:57 ` [PATCH v2 20/23] mm/slab_common: factor out __do_kmalloc_node() Hyeonggon Yoo
2022-04-14 11:45   ` Hyeonggon Yoo
2022-04-29 14:48   ` Vlastimil Babka
2022-04-14  8:57 ` [PATCH v2 21/23] mm/sl[au]b: remove kmem_cache_alloc_node_trace() Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 22/23] mm/sl[auo]b: move definition of __ksize() to mm/slab.h Hyeonggon Yoo
2022-04-14  8:57 ` [PATCH v2 23/23] mm/sl[au]b: check if large object is valid in __ksize() Hyeonggon Yoo
2022-04-14  9:58   ` Christoph Lameter
2022-04-14 11:46     ` Hyeonggon Yoo [this message]
2022-04-14 12:36 ` [PATCH v2 00/23] common kmalloc for SLUB and SLAB v2 Hyeonggon Yoo
     [not found] ` <20220414085727.643099-9-42.hyeyoo@gmail.com>
2022-04-26 17:15   ` [PATCH v2 08/23] mm/slab_common: make kmalloc_large_node() consistent with kmalloc_large() Vlastimil Babka
2022-04-28  6:35     ` Hyeonggon Yoo

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