From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail115-76.sinamail.sina.com.cn (mail115-76.sinamail.sina.com.cn [218.30.115.76]) (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 33C8377F00 for ; Tue, 12 Mar 2024 10:55:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=218.30.115.76 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710240916; cv=none; b=EYOlXKJiBPmkDTcFknpUOsvQ3zMTrlEJ0gTOk0OKoVMz/X9xRAHkmzPBe6T5a0adQwX3UmsPkwECy+27g4JKzWTkEh+opEkt70XWslVWhv/B0qDCulTBABUkRlI9eiz+0ELtCET842o5twIZHHoyIkKmwSg6ArytybA/M5rhq9g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710240916; c=relaxed/simple; bh=j7aDBG8JUvUi8lwL1bWk+WpOhLiCDcBDJp39nC4wfr8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=TmjF3zaLPBmrXfyZRYtr1RwdOxl2MUmHYFAmOeSNPBSrJTQu82jg/ISB8VnT9QPRWdi02Yl0K2xoLT8kd1ZzXgokjKNtQLscZLhL+hppwopvlRTzQaj/KCNnde4F6kfhjlwlQBz6b43STwgSUxvepQFg/QmvoZWiZVtLi90G4KM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; arc=none smtp.client-ip=218.30.115.76 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([113.88.51.55]) by sina.com (10.75.12.45) with ESMTP id 65F0347F00009958; Tue, 12 Mar 2024 18:54:59 +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: 8936331457689 X-SMAIL-UIID: D607E81DBBDE4A0C977C9F78490E4453-20240312-185459-1 From: Hillf Danton To: =?UTF-8?q?Wei=C3=9F=2C=20Simone?= Cc: miklos@szeredi.hu, amir73il@gmail.com, linux-unionfs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: possible deadlock in ovl_llseek 27c1936af506 Date: Tue, 12 Mar 2024 18:54:45 +0800 Message-Id: <20240312105445.2051-1-hdanton@sina.com> In-Reply-To: <03d7a29c7e1a8c5741680ea9bc83b4fb40358a25.camel@elektrobit.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On Tue, 12 Mar 2024 07:10:27 +0000 Weiß, Simone > > For some experimentation, I have been running fuzzing campaigns and I > noticed a possible deadlock in ovl_llseek . Feel free to take a look at another case of deadlock [1] [1] https://lore.kernel.org/lkml/ZPOtwcMHN_fpdrpt@boqun-archlinux/