From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from r3-19.sinamail.sina.com.cn (r3-19.sinamail.sina.com.cn [202.108.3.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 89A81246764 for ; Mon, 22 Sep 2025 22:59:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.108.3.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758581977; cv=none; b=d2aKhIe5gcWOJRwNEkHTRJL6ncf6OV5vEiEg+WgJBvhBYZoA+mPpbzdK1b8mhhshL/BnkycT4QBu/ySSoz8EHAlA/jrlfkSNud5i792A/2tVM6gZI5oYpSVYtkc/N0vKIRA5tMGMYCxNIF1XJMDrlf5DqYJ8Fkj5BMsJ+ZpN784= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758581977; c=relaxed/simple; bh=6JIKavNMsCVzCbTgEM7D4yYHPb5qWgUy33rt1dH4N7w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Fw2gCNKvu2ZoBRWpMkbiz+td/QyDIbXp2P3TR4+A1omUM22fGn1IzuNDhBKQ7qLIg/CzBw2p9EE7RTLv0UvGdagnr9V5YiQdJab8Xw2HmMHm87xphxeMN+aMCwA6dYZ4CGaqhBg1XZH3xXeNhiBx+C8nSTdbSrD5bP36EffMWyQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b=UHSyUcIq; arc=none smtp.client-ip=202.108.3.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b="UHSyUcIq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1758581972; bh=63V+dCJdxqQLzgPfVm6yIkiMqBaRWnBqIIYzurwPefA=; h=From:Subject:Date:Message-ID; b=UHSyUcIqcXp2IPn0XR/k3rFV6dAtI9nG5BjmfJ2dszBNrhDhMG5yE6YYkwmQHgTLX EI2dRKwQ8K+8aqOgtEJu0O3DfhvK2MOiixj6AH559DiN8+B/D+nuXdQHG/x2JMTDye BJlZlHlipGuepVoUvXhiIklgnSp8Oc8DMLGZovss= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.249.58.236]) by sina.com (10.54.253.32) with ESMTP id 68D1D4A400001201; Mon, 23 Sep 2025 06:58:46 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 5073724456663 X-SMAIL-UIID: 5494ED2ADE3642D8AEDA5531F6C1A036-20250923-065846-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [block?] general protection fault in blk_mq_free_tags_callback Date: Tue, 23 Sep 2025 06:58:33 +0800 Message-ID: <20250922225834.7386-1-hdanton@sina.com> In-Reply-To: <68d1b079.a70a0220.1b52b.0000.GAE@google.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > Date: Mon, 22 Sep 2025 13:24:25 -0700 [thread overview] > Hello, > > syzbot found the following issue on: > > HEAD commit: 846bd2225ec3 Add linux-next specific files for 20250919 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=13c238e2580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=135377594f35b576 > dashboard link: https://syzkaller.appspot.com/bug?extid=5c5d41e80248d610221f > compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=155e427c580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17bb8142580000 #syz test linux-next master --- x/block/blk-mq-tag.c +++ y/block/blk-mq-tag.c @@ -565,6 +565,7 @@ struct blk_mq_tags *blk_mq_init_tags(uns if (!tags) return NULL; + INIT_LIST_HEAD(&tags->page_list); tags->nr_tags = total_tags; tags->nr_reserved_tags = reserved_tags; spin_lock_init(&tags->lock); --