From: Harry Yoo via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Qing Wang <wangqing7171@gmail.com>,
"Vlastimil Babka \(SUSE\)" <vbabka@kernel.org>,
lorenzo.stoakes@oracle.com, jannh@google.com,
Hao Li <hao.li@linux.dev>,
syzkaller-bugs@googlegroups.com, linux-kernel@vger.kernel.org,
Liam.Howlett@oracle.com,
syzbot+cae7809e9dc1459e4e63@syzkaller.appspotmail.com,
linux-mm@kvack.org, sj1557.seo@samsung.com, pfalcato@suse.de,
linux-fsdevel@vger.kernel.org, jaegeuk@kernel.org,
akpm@linux-foundation.org,
linux-f2fs-devel@lists.sourceforge.net, linkinjeon@kernel.org,
vbabka@suse.cz
Subject: Re: [f2fs-dev] [syzbot] [mm?] [f2fs?] [exfat?] memory leak in __kfree_rcu_sheaf
Date: Wed, 11 Mar 2026 12:20:42 +0900 [thread overview]
Message-ID: <abDfiqS7A8S6TsPd@hyeyoo> (raw)
In-Reply-To: <abDbxMmK0XEYgM1b@hyeyoo>
On Wed, Mar 11, 2026 at 12:04:36PM +0900, Harry Yoo wrote:
> > > > -----------8<-----------------------------------
> > > > diff --git a/mm/slub.c b/mm/slub.c
> > > > index 0c906fefc31b..401557ff5487 100644
> > > > --- a/mm/slub.c
> > > > +++ b/mm/slub.c
> > > > @@ -7513,6 +7513,7 @@ static void early_kmem_cache_node_alloc(int node)
> > > > slab->freelist = get_freepointer(kmem_cache_node, n);
> > > > slab->inuse = 1;
> > > > kmem_cache_node->node[node] = n;
> > > > + kmemleak_alloc(n, sizeof(*n), 1, GFP_NOWAIT);
>
> By the way, this should have been kmem_cache_node->object_size.
> Because... the length of kmem_cache_node.node array is not always
> MAX_NUMNODES (yeah, that's confusing).
Oops, please feel free to ignore this paragraph!
I was totally confused, it's not size of struct kmem_cache.
--
Cheers,
Harry / Hyeonggon
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WARNING: multiple messages have this Message-ID (diff)
From: Harry Yoo <harry.yoo@oracle.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>,
Qing Wang <wangqing7171@gmail.com>,
syzbot+cae7809e9dc1459e4e63@syzkaller.appspotmail.com,
Liam.Howlett@oracle.com, akpm@linux-foundation.org,
chao@kernel.org, jaegeuk@kernel.org, jannh@google.com,
linkinjeon@kernel.org, linux-f2fs-devel@lists.sourceforge.net,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, lorenzo.stoakes@oracle.com, pfalcato@suse.de,
sj1557.seo@samsung.com, syzkaller-bugs@googlegroups.com,
vbabka@suse.cz, Hao Li <hao.li@linux.dev>
Subject: Re: [syzbot] [mm?] [f2fs?] [exfat?] memory leak in __kfree_rcu_sheaf
Date: Wed, 11 Mar 2026 12:20:42 +0900 [thread overview]
Message-ID: <abDfiqS7A8S6TsPd@hyeyoo> (raw)
In-Reply-To: <abDbxMmK0XEYgM1b@hyeyoo>
On Wed, Mar 11, 2026 at 12:04:36PM +0900, Harry Yoo wrote:
> > > > -----------8<-----------------------------------
> > > > diff --git a/mm/slub.c b/mm/slub.c
> > > > index 0c906fefc31b..401557ff5487 100644
> > > > --- a/mm/slub.c
> > > > +++ b/mm/slub.c
> > > > @@ -7513,6 +7513,7 @@ static void early_kmem_cache_node_alloc(int node)
> > > > slab->freelist = get_freepointer(kmem_cache_node, n);
> > > > slab->inuse = 1;
> > > > kmem_cache_node->node[node] = n;
> > > > + kmemleak_alloc(n, sizeof(*n), 1, GFP_NOWAIT);
>
> By the way, this should have been kmem_cache_node->object_size.
> Because... the length of kmem_cache_node.node array is not always
> MAX_NUMNODES (yeah, that's confusing).
Oops, please feel free to ignore this paragraph!
I was totally confused, it's not size of struct kmem_cache.
--
Cheers,
Harry / Hyeonggon
next prev parent reply other threads:[~2026-03-11 3:21 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-09 18:26 [f2fs-dev] [syzbot] [mm?] [f2fs?] [exfat?] memory leak in __kfree_rcu_sheaf syzbot
2026-02-09 18:26 ` syzbot
2026-03-02 3:41 ` [f2fs-dev] " Qing Wang
2026-03-02 3:41 ` Qing Wang
2026-03-02 3:57 ` [f2fs-dev] " syzbot
2026-03-02 3:57 ` syzbot
2026-03-02 8:39 ` [f2fs-dev] " Vlastimil Babka (SUSE) via Linux-f2fs-devel
2026-03-02 8:39 ` Vlastimil Babka (SUSE)
2026-03-04 1:30 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-04 1:30 ` Harry Yoo
2026-03-04 13:39 ` [f2fs-dev] " Vlastimil Babka (SUSE) via Linux-f2fs-devel
2026-03-04 13:39 ` Vlastimil Babka (SUSE)
2026-03-06 19:35 ` [f2fs-dev] " Catalin Marinas
2026-03-06 19:35 ` Catalin Marinas
2026-03-08 11:02 ` [f2fs-dev] " Catalin Marinas
2026-03-08 11:02 ` Catalin Marinas
2026-03-08 12:31 ` [f2fs-dev] " syzbot
2026-03-08 12:31 ` syzbot
2026-03-08 11:04 ` [f2fs-dev] " Catalin Marinas
2026-03-08 11:04 ` Catalin Marinas
2026-03-08 12:42 ` [f2fs-dev] " syzbot
2026-03-08 12:42 ` syzbot
2026-03-09 10:46 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-09 10:46 ` Harry Yoo
2026-03-09 11:11 ` [f2fs-dev] " syzbot
2026-03-09 11:11 ` syzbot
2026-03-09 12:17 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-09 12:17 ` Harry Yoo
2026-03-09 20:31 ` [f2fs-dev] " Catalin Marinas
2026-03-09 20:31 ` Catalin Marinas
2026-03-11 3:04 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-11 3:04 ` Harry Yoo
2026-03-11 3:20 ` Harry Yoo via Linux-f2fs-devel [this message]
2026-03-11 3:20 ` Harry Yoo
2026-03-10 3:39 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-10 3:39 ` Harry Yoo
2026-03-10 3:54 ` [f2fs-dev] " syzbot
2026-03-10 3:54 ` syzbot
2026-03-10 6:11 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-10 6:11 ` Harry Yoo
2026-03-10 6:29 ` [f2fs-dev] " syzbot
2026-03-10 6:29 ` syzbot
2026-03-10 8:10 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-10 8:10 ` Harry Yoo
2026-03-10 9:40 ` [f2fs-dev] " syzbot
2026-03-10 9:40 ` syzbot
2026-03-18 2:34 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-18 2:34 ` Harry Yoo
2026-03-18 3:08 ` [f2fs-dev] " syzbot
2026-03-18 3:08 ` syzbot
2026-03-18 4:10 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-18 4:10 ` Harry Yoo
2026-03-18 5:02 ` [f2fs-dev] " syzbot
2026-03-18 5:02 ` syzbot
2026-03-11 9:57 ` [f2fs-dev] " Qing Wang
2026-03-11 9:57 ` Qing Wang
2026-03-11 10:17 ` [f2fs-dev] " syzbot
2026-03-11 10:17 ` syzbot
2026-03-11 10:48 ` [f2fs-dev] " Qing Wang
2026-03-11 10:48 ` Qing Wang
2026-03-11 11:03 ` [f2fs-dev] " syzbot
2026-03-11 11:03 ` syzbot
2026-03-11 11:23 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-11 11:23 ` Harry Yoo
2026-03-20 0:06 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-20 0:06 ` Harry Yoo
2026-03-20 10:34 ` [f2fs-dev] " syzbot
2026-03-20 10:34 ` syzbot
2026-03-20 11:20 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
2026-03-20 11:20 ` Harry Yoo
2026-05-02 10:09 ` David Timber
2026-05-03 6:00 ` David Timber
2026-05-03 7:17 ` [f2fs-dev] [syzbot] [mm?] [exfat?] [f2fs?] " syzbot
2026-05-03 7:17 ` syzbot
2026-05-03 6:05 ` [syzbot] [mm?] [f2fs?] [exfat?] " David Timber
2026-05-03 7:27 ` [f2fs-dev] [syzbot] [mm?] [exfat?] [f2fs?] " syzbot
2026-05-03 7:27 ` syzbot
2026-05-03 7:41 ` [f2fs-dev] " David Timber via Linux-f2fs-devel
2026-05-03 7:41 ` David Timber
2026-05-04 20:17 ` [syzbot] [mm?] [f2fs?] [exfat?] " David Timber
2026-05-04 20:51 ` [f2fs-dev] [syzbot] [mm?] [exfat?] [f2fs?] " syzbot
2026-05-04 20:51 ` syzbot
2026-05-04 20:26 ` [syzbot] [mm?] [f2fs?] [exfat?] " David Timber
2026-05-04 21:12 ` [f2fs-dev] [syzbot] [mm?] [exfat?] [f2fs?] " syzbot
2026-05-04 21:12 ` syzbot
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