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 ADFA521FF2D for ; Tue, 5 Aug 2025 06:29:19 +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=1754375359; cv=none; b=TlF68uMKhZ4hvXz4YhsSEZLo+S4Xb9ToY/pgnW732JiGroyxa0pZzvjM0BunXBoCHuZfNThuWTgsFwtqDVd+G+m81ZbMcBtq+LnIqqo2+nnIX0u5zOBZ+GaSqwjvn9qa7kmYB4fYaIJpUC+RrW/yaRCVK7fg0D8ccouy39fPlVE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754375359; c=relaxed/simple; bh=nibfP85OrtQzeUHNPYnVq5ZQtUssf0yOK2wCjiWDsmE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=u5NMAVhKLqH394v5nzDc7Lub3eik+k4YaL4aXLA194VqNw5SOQl8A3FlozPYhm0hES6oxEaCZLIjP1vuqDYEAWj2znRy2xvPMBkH96F2vUg5TworRZVntUj5FpTYop3NuvLtpSy7LC9JnwCjJidX/6EPMkKyrjwuz/gxTvE2Ev4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=J1q+hd5+; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="J1q+hd5+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0467CC4CEF4; Tue, 5 Aug 2025 06:29:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754375359; bh=nibfP85OrtQzeUHNPYnVq5ZQtUssf0yOK2wCjiWDsmE=; h=From:To:Cc:Subject:Date:From; b=J1q+hd5+nkJMEGBGayUV29fS5leHdv+JzlcpcCxaNGvsAXpafOfbwXblVvjrJb93o HACOvTrrKJ5DVTLDCp2f8+uA+YJsqKLJYx3/3+z6jcyL2fJ2Wd4D3AqclkK+twBx9F 3860CebAMKDo2epd5KARPSLDrC232RywcsgfiBs0G5GWlywawQW5yoY5Y2ZHMy1qZf hvxBuCv7Zlxa6s7/cH2nikqDFf9mgA8mHSQhA/pmvB5BvZDV82lED0pR9XZ1mzAgwL /LUFspRUk6Sd/7OVfHx2HoQkdhyTTbMEqoI5XORrF1cwuO3wAmAWdHsb9FJr5kAMf5 oPE/SRq/47PCQ== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH v3 1/3] f2fs: fix to avoid overflow while left shift operation Date: Tue, 5 Aug 2025 14:29:10 +0800 Message-ID: <20250805062912.3070949-1-chao@kernel.org> X-Mailer: git-send-email 2.50.1.565.gc32cd1483b-goog Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Should cast type of folio->index from pgoff_t to loff_t to avoid overflow while left shift operation. Fixes: 3265d3db1f16 ("f2fs: support partial truncation on compressed inode") Signed-off-by: Chao Yu --- fs/f2fs/compress.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 5c1f47e45dab..6cd8902849cf 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -1245,7 +1245,7 @@ int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock) for (i = cluster_size - 1; i >= 0; i--) { struct folio *folio = page_folio(rpages[i]); - loff_t start = folio->index << PAGE_SHIFT; + loff_t start = (loff_t)folio->index << PAGE_SHIFT; if (from <= start) { folio_zero_segment(folio, 0, folio_size(folio)); -- 2.49.0