From: Catalin Marinas <catalin.marinas@arm.com>
To: syzbot+cae7809e9dc1459e4e63@syzkaller.appspotmail.com
Cc: Qing Wang <wangqing7171@gmail.com>,
"Vlastimil Babka \(SUSE\)" <vbabka@kernel.org>,
lorenzo.stoakes@oracle.com, jannh@google.com,
syzkaller-bugs@googlegroups.com, linux-kernel@vger.kernel.org,
Liam.Howlett@oracle.com, linux-f2fs-devel@lists.sourceforge.net,
linux-mm@kvack.org, vbabka@suse.cz, Hao Li <hao.li@linux.dev>,
pfalcato@suse.de, linux-fsdevel@vger.kernel.org,
jaegeuk@kernel.org, akpm@linux-foundation.org,
sj1557.seo@samsung.com, linkinjeon@kernel.org,
Harry Yoo <harry.yoo@oracle.com>
Subject: Re: [f2fs-dev] [syzbot] [mm?] [f2fs?] [exfat?] memory leak in __kfree_rcu_sheaf
Date: Sun, 8 Mar 2026 11:04:06 +0000 [thread overview]
Message-ID: <aa1XpnY0TRvDGf4i@arm.com> (raw)
In-Reply-To: <aassZV5PjgFx8dSI@arm.com>
#syz test
diff --git a/mm/slab_common.c b/mm/slab_common.c
index d5a70a831a2a..73f4668d870d 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -1954,8 +1954,14 @@ void kvfree_call_rcu(struct rcu_head *head, void *ptr)
if (!head)
might_sleep();
- if (!IS_ENABLED(CONFIG_PREEMPT_RT) && kfree_rcu_sheaf(ptr))
+ if (!IS_ENABLED(CONFIG_PREEMPT_RT) && kfree_rcu_sheaf(ptr)) {
+ /*
+ * The object is now queued for deferred freeing via an RCU
+ * sheaf. Tell kmemleak to ignore it.
+ */
+ kmemleak_ignore(ptr);
return;
+ }
// Queue the object but don't yet schedule the batch.
if (debug_rcu_head_queue(ptr)) {
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WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: syzbot+cae7809e9dc1459e4e63@syzkaller.appspotmail.com
Cc: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>,
Harry Yoo <harry.yoo@oracle.com>,
Qing Wang <wangqing7171@gmail.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: Sun, 8 Mar 2026 11:04:06 +0000 [thread overview]
Message-ID: <aa1XpnY0TRvDGf4i@arm.com> (raw)
In-Reply-To: <aassZV5PjgFx8dSI@arm.com>
#syz test
diff --git a/mm/slab_common.c b/mm/slab_common.c
index d5a70a831a2a..73f4668d870d 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -1954,8 +1954,14 @@ void kvfree_call_rcu(struct rcu_head *head, void *ptr)
if (!head)
might_sleep();
- if (!IS_ENABLED(CONFIG_PREEMPT_RT) && kfree_rcu_sheaf(ptr))
+ if (!IS_ENABLED(CONFIG_PREEMPT_RT) && kfree_rcu_sheaf(ptr)) {
+ /*
+ * The object is now queued for deferred freeing via an RCU
+ * sheaf. Tell kmemleak to ignore it.
+ */
+ kmemleak_ignore(ptr);
return;
+ }
// Queue the object but don't yet schedule the batch.
if (debug_rcu_head_queue(ptr)) {
next prev parent reply other threads:[~2026-03-08 11:04 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 ` Catalin Marinas [this message]
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 ` [f2fs-dev] " Harry Yoo via Linux-f2fs-devel
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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