From: Edward Adam Davis <eadavis@qq.com>
To: syzbot+0a5079ee014f4b907817@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [kernel?] KASAN: slab-out-of-bounds Read in __futex_pivot_hash
Date: Mon, 2 Jun 2025 10:59:45 +0800 [thread overview]
Message-ID: <tencent_BEF362E363C960C3BD0448D77DF76066D105@qq.com> (raw)
In-Reply-To: <683ca389.a00a0220.d8eae.0035.GAE@google.com>
#syz test
diff --git a/kernel/futex/core.c b/kernel/futex/core.c
index 19a2c65f3d37..ea6b8266efb9 100644
--- a/kernel/futex/core.c
+++ b/kernel/futex/core.c
@@ -1754,7 +1754,10 @@ int futex_hash_prctl(unsigned long arg2, unsigned long arg3, unsigned long arg4)
return -EINVAL;
if (arg4 & FH_FLAG_IMMUTABLE)
flags |= FH_IMMUTABLE;
+ DEFINE_MUTEX(fha_syn);
+ mutex_lock(&fha_syn);
ret = futex_hash_allocate(arg3, flags);
+ mutex_unlock(&fha_syn);
break;
case PR_FUTEX_HASH_GET_SLOTS:
next prev parent reply other threads:[~2025-06-02 3:06 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-01 19:01 syzbot
2025-06-02 2:59 ` Edward Adam Davis [this message]
2025-06-02 3:15 ` syzbot
2025-06-02 3:19 ` Edward Adam Davis
2025-06-02 3:40 ` syzbot
2025-06-02 4:37 ` [PATCH] futex: sync set the hash table slot Edward Adam Davis
[not found] <20250601231608.2638-1-hdanton@sina.com>
2025-06-01 23:31 ` [syzbot] [kernel?] KASAN: slab-out-of-bounds Read in __futex_pivot_hash syzbot
[not found] <20250602043805.2660-1-hdanton@sina.com>
2025-06-02 4:58 ` syzbot
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