From: Hillf Danton <hdanton@sina.com>
To: syzbot <syzbot+b7a3118f6a494674077f@syzkaller.appspotmail.com>
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [mm?] BUG: corrupted list in do_compact_page
Date: Thu, 3 Oct 2024 18:59:34 +0800 [thread overview]
Message-ID: <20241003105934.1979-1-hdanton@sina.com> (raw)
In-Reply-To: <66fe2a10.050a0220.28a3b.0209.GAE@google.com>
On Wed, 02 Oct 2024 22:22:24 -0700
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: f23aa4c0761a Merge tag 'hid-for-linus-2024090201' of git:/..
> git tree: upstream
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=174ab580580000
#syz test
--- x/mm/z3fold.c
+++ y/mm/z3fold.c
@@ -1351,8 +1351,11 @@ static void z3fold_page_putback(struct p
pool = zhdr_to_pool(zhdr);
z3fold_page_lock(zhdr);
- if (!list_empty(&zhdr->buddy))
+ if (!list_empty(&zhdr->buddy)) {
+ spin_lock(&pool->lock);
list_del_init(&zhdr->buddy);
+ spin_unlock(&pool->lock);
+ }
INIT_LIST_HEAD(&page->lru);
if (put_z3fold_locked(zhdr))
return;
--
next prev parent reply other threads:[~2024-10-03 10:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-18 11:58 [syzbot] [mm?] BUG: corrupted list in do_compact_page syzbot
2024-10-03 5:22 ` syzbot
2024-10-03 10:59 ` Hillf Danton [this message]
2024-10-03 11:36 ` syzbot
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