From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f178.google.com (mail-pf1-f178.google.com [209.85.210.178]) (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 9227A3168F5 for ; Mon, 3 Nov 2025 16:37:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.178 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762187844; cv=none; b=aoDDNpoxzGOrdVuoYTTM/REX98zHGoSunwLlBs+incM3JcY4vAC8ZJIyTd+B/vulCk/wu7sPxomseO68yrLfyS2ETt0WJSA2SMw2zZMc8HmfgYr+QgmCF58cSR/GA5B5nxE5BtPJ881DdhYTUOTkULJGh1oSmrkrHv9AR8xTUn4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762187844; c=relaxed/simple; bh=wJjmntvfExnlICRxK102abAFvivMt90fKAxX98hdlYk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Uqft9bALyHfhnM29n405HFdT5JlavQUR7DIhkjYxjbQlGunWTW/WH8tmCHIkYQIyLz6Ukiw0LICIQFlnbwPB2IzQnpv4y6L4JCowOYNKxbouc+o79VOoVbUnyDwMatZzzhzz4HeHWVgYNzZPPJwOctkS811ci5OfLIPn9RZWLPw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=V9Xh9GEq; arc=none smtp.client-ip=209.85.210.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="V9Xh9GEq" Received: by mail-pf1-f178.google.com with SMTP id d2e1a72fcca58-78af3fe5b17so4347365b3a.2 for ; Mon, 03 Nov 2025 08:37:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1762187842; x=1762792642; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=RqJ5gNa1nUUGBUXHUrJf6QlrVR0rCRb3Pp7Ymbcprkc=; b=V9Xh9GEqqakLENJv++F44TPZ6hs4GdYcXT+kdy11SDPwcY5sh8xJLitGOpmCtW8JDr XgXLIGp9vDzDFUwwTpZ9lesxspeUbb4xtz7rQpOA3E8Hb53ijuSEmtzUL1WUMVf7nvXI cznb0gCHxb98GYaWQWVdF7b7stGWR9ZMa6CJTApPDpqC5kwUbF3wSz3xWKr84P2sWdS5 9wWbQY6Wzd5q10MATigfea4EHH70mPWtlC82+ik/TUhToHOdX1ljggAyq78S+lfxwnTW QTGRgKHCXEcW1V2kj4LgfIbUb683rfXk+oV1lKY/7kDkjnxRBKucT27jSsbvhxD62gsW IAlw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762187842; x=1762792642; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=RqJ5gNa1nUUGBUXHUrJf6QlrVR0rCRb3Pp7Ymbcprkc=; b=LYGTGOJmJpJw/oFb+z1T2h7GDsTMMH4bfv67ubV4HdSyuSzTM2TIEQyyl3pWOfXup4 8Ijku72aS/oAeFYP+xC4CGS4mFUBZEKu1WZpJqqzYf29h7apkRXwSJUsmo8Q2rRs8A0w FnPTux4Mgwcvs0iMTRvF3TOmBQbVnIyR7BBBLT9b17yBqjUMWwo/qt0fkMjAfGCh1Ayg oBFfxRh45xpGyj+QXiRrxT+WQ4v+Q2PBfILYDGz13dSdYpaxsrx+w0yeLVIJNvdyCfiy V8NBXKfCkAkbfimulUrgARqE5ydyIEshBDNqCczr/Afi/q3qKmSKX1qM3yg2STKtoAem 53rA== X-Forwarded-Encrypted: i=1; AJvYcCWwUWJD7/zMg2fuTfaZWHKCzmBpUdAom3rGBs86vGimm5xjR/fQEesP0K49xC6XQdDUgaQyvZaFPGkl+g==@vger.kernel.org X-Gm-Message-State: AOJu0YxfVr5pPojEcVqe5dWHRvcAl37sMz7icb2LAg+dMUTXOx9UDjVf uokq8okAzZrHOcWT3Xde18nYVXDglcTAeX6zr5sqE1xrVq2innkgmOph X-Gm-Gg: ASbGncuJSIvzMcbkRXtxj/w62wYc1MKRY0+dl/ag1lwrFfRt1517kfe0CgFLoZrbZ4I Ab4A4fdg0MAmPSujOQgzDeuAYy2zs3E5BH+tR3sUVuKm6jq/M64kHD6j1K8J1J1dM4xl7RE2sVx 6FnjJb8w1owtq/2IPvH8u+l9ClZzYphpoNid+EcEZN+sHnUewJTwQrHVmqohbRxskKAFMgJ8GCT W9IvQ7n4Cs7RdjponmmIpxqtnlpvKw3Zx2g2sj2TFdNa3DjmDJ0R3+Y0r9GMHsaG/Xkra3cSC7A CaMj5D95uimR//0xBw0LZt4KxDwyHBUotc3HKIcoRLZ9a6uZd+qEcqmKIxJ/rhLM5QS9y41xQs7 E29tHRrHsutW8N9h88S/Jc+pE1HcMU1zBM6QE//OrjSLkk4ixEvg4Y/pp8ch9LQp+PWAA1Q67ER G6M8X+pFH0KXY6NLHgyptmqBIDVfQ= X-Google-Smtp-Source: AGHT+IG+w7iJAzmb9LjCnbErWEAX7LNvJkcpla1jAFDM+Y4gmMZZU0oJMClikIddg63gu998oSNJwA== X-Received: by 2002:a05:6a20:939f:b0:246:d43a:3856 with SMTP id adf61e73a8af0-348ca565705mr15735758637.22.1762187841867; Mon, 03 Nov 2025 08:37:21 -0800 (PST) Received: from monty-pavel.. ([120.245.115.90]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3407ec24330sm6853704a91.2.2025.11.03.08.37.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Nov 2025 08:37:21 -0800 (PST) From: Yongpeng Yang To: Namjae Jeon , Sungjong Seo , OGAWA Hirofumi , Jan Kara , Carlos Maiolino , Jens Axboe , Greg Kroah-Hartman , Sasha Levin , Alexander Viro , Christian Brauner , Christoph Hellwig Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, stable@vger.kernel.org, Matthew Wilcox , "Darrick J . Wong" , Yongpeng Yang Subject: [PATCH v4 2/5] exfat: check return value of sb_min_blocksize in exfat_read_boot_sector Date: Tue, 4 Nov 2025 00:36:15 +0800 Message-ID: <20251103163617.151045-3-yangyongpeng.storage@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251103163617.151045-2-yangyongpeng.storage@gmail.com> References: <20251103163617.151045-2-yangyongpeng.storage@gmail.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Yongpeng Yang sb_min_blocksize() may return 0. Check its return value to avoid accessing the filesystem super block when sb->s_blocksize is 0. Cc: # v6.15 Fixes: 719c1e1829166d ("exfat: add super block operations") Signed-off-by: Yongpeng Yang --- fs/exfat/super.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/exfat/super.c b/fs/exfat/super.c index 7f9592856bf7..74d451f732c7 100644 --- a/fs/exfat/super.c +++ b/fs/exfat/super.c @@ -433,7 +433,10 @@ static int exfat_read_boot_sector(struct super_block *sb) struct exfat_sb_info *sbi = EXFAT_SB(sb); /* set block size to read super block */ - sb_min_blocksize(sb, 512); + if (!sb_min_blocksize(sb, 512)) { + exfat_err(sb, "unable to set blocksize"); + return -EINVAL; + } /* read boot sector */ sbi->boot_bh = sb_bread(sb, 0); -- 2.43.0