From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E25F4EB8 for ; Fri, 22 Dec 2023 03:06:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f197.google.com with SMTP id e9e14a558f8ab-35fb2956a35so14556885ab.2 for ; Thu, 21 Dec 2023 19:06:59 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703214419; x=1703819219; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=4e0P1LlKrejCG3qxMmE4BUKBi2vj6JYqPWltFR3oFTA=; b=QZRbXxbJiA5HSFpSvQYlmeXIwEnCxmNXRpMpurw+0TS548+CJKcZAQrOhSx9jQ9FDX cLiNfapgywu81K9qJvaONC39O9sbix3TRO8++r+H2XJ3qbgnodgnsn8vavpQsRByx8Gr zsBb08fB+VoFTz50f0ytQ7rDz7d8nSm1OUqkK7jfgM6aY4I/Lj9CnKY8/lENTGwZooyl 0pUuVxEy5Wl/AlsoMCc+DxU0QdxLdCSYPRo6plFw/DCUehMVXNvWD6GAdnISm/SBZ+W6 vV+Yv1+902REBBu2kaj4OaeZJAhVzg2JdWi3YOvwFmOsJoxyS8bfNbCuInFsoQguakth CB9Q== X-Gm-Message-State: AOJu0YzKi5/owjdMR1WhnI6mwe5vw29/kKIznos1/t3357tnmefpTips 3gVdtfF6hV4SlhynhkbtejqFsin8J1BVIIYZU8JqolpFFsUH/qs= X-Google-Smtp-Source: AGHT+IG0UTIOtgfI46UMTl6wbWRmI1MVdisW3+/43GC2Q4zx/ogM0DvsB6ce+nMOJd2zVwsIwfgRhmciOlAq5I0ZeYApf9JWfG+F Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2183:b0:35f:b16a:d0cb with SMTP id j3-20020a056e02218300b0035fb16ad0cbmr31397ila.2.1703214418898; Thu, 21 Dec 2023 19:06:58 -0800 (PST) Date: Thu, 21 Dec 2023 19:06:58 -0800 In-Reply-To: <000000000000e32f3c0609cb98d0@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006a3904060d1082e7@google.com> Subject: Re: [syzbot] [reiserfs?] possible deadlock in chmod_common (2) From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: [reiserfs?] possible deadlock in chmod_common (2) Author: lizhi.xu@windriver.com #syz test https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git aafe7ad77b91 diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c index dd33f8cc6eda..cf219a998a89 100644 --- a/fs/reiserfs/ioctl.c +++ b/fs/reiserfs/ioctl.c @@ -100,7 +100,9 @@ long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) err = -EPERM; break; } + reiserfs_write_unlock(inode->i_sb); err = mnt_want_write_file(filp); + reiserfs_write_lock(inode->i_sb); if (err) break; if (get_user(inode->i_generation, (int __user *)arg)) {