From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 552CC2737F6; Tue, 21 Oct 2025 19:52:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761076363; cv=none; b=HDaEksIviAStjaXexqZEjUM0vB81HXAwv4WVV3R2+zmep/NGLjTnZp+Nai3qVOy+e9vnEoKJid0oeTWlsVcW6i6E9N5S9wnyhGtCWEH646+SVm0YYtw+cB1p85yrFoFdNrlfj35xvmjWtALXm5wCb4NqBIFMCvLc3Ezavx2j2cE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761076363; c=relaxed/simple; bh=Yi9sScQaH9IgdnVwrHuvGabhCvC33aaIUQlT/MaERkY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=p/RwBbkfmm64lmCZkXgauUUwxWak2w0pyuil5n+fKH4dljXG3IuTHm4tDcejJ5Qu8MtigHpSEBv/EWrwskgV6TQjRo6pa/gXyMEhMqCdSULCRb1GlUiA0N26mwIOiSYwwkyqdHZuj/8y/PclE4V0edvcXObZZPRTsFQwqkxHzAQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=bPc4nNRv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="bPc4nNRv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A09EC4CEF1; Tue, 21 Oct 2025 19:52:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1761076363; bh=Yi9sScQaH9IgdnVwrHuvGabhCvC33aaIUQlT/MaERkY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bPc4nNRvMQCKtdYrNoS7h/69D5can707pNpHTOs1/HG4V+QhGN175UYeFQJZWs9/S iWImyMjpu1V/9OG5gxXyhIiiBFsTc5qf4RWYCHqYFuKbixLog3GjPdKZkmu0Vbu05X p3u5xqgRDl0VBxewnqE9uxQsfkzXRlaG+CxD3eGk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chao Yu , Jaegeuk Kim Subject: [PATCH 6.6 004/105] f2fs: fix wrong block mapping for multi-devices Date: Tue, 21 Oct 2025 21:50:13 +0200 Message-ID: <20251021195021.599570699@linuxfoundation.org> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251021195021.492915002@linuxfoundation.org> References: <20251021195021.492915002@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jaegeuk Kim commit 9d5c4f5c7a2c7677e1b3942772122b032c265aae upstream. Assuming the disk layout as below, disk0: 0 --- 0x00035abfff disk1: 0x00035ac000 --- 0x00037abfff disk2: 0x00037ac000 --- 0x00037ebfff and we want to read data from offset=13568 having len=128 across the block devices, we can illustrate the block addresses like below. 0 .. 0x00037ac000 ------------------- 0x00037ebfff, 0x00037ec000 ------- | ^ ^ ^ | fofs 0 13568 13568+128 | ------------------------------------------------------ | LBA 0x37e8aa9 0x37ebfa9 0x37ec029 --- map 0x3caa9 0x3ffa9 In this example, we should give the relative map of the target block device ranging from 0x3caa9 to 0x3ffa9 where the length should be calculated by 0x37ebfff + 1 - 0x37ebfa9. In the below equation, however, map->m_pblk was supposed to be the original address instead of the one from the target block address. - map->m_len = min(map->m_len, dev->end_blk + 1 - map->m_pblk); Cc: stable@vger.kernel.org Fixes: 71f2c8206202 ("f2fs: multidevice: support direct IO") Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Greg Kroah-Hartman --- fs/f2fs/data.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1506,8 +1506,8 @@ static bool f2fs_map_blocks_cached(struc struct f2fs_dev_info *dev = &sbi->devs[bidx]; map->m_bdev = dev->bdev; - map->m_pblk -= dev->start_blk; map->m_len = min(map->m_len, dev->end_blk + 1 - map->m_pblk); + map->m_pblk -= dev->start_blk; } else { map->m_bdev = inode->i_sb->s_bdev; }