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 6C20B233CFE; Sun, 24 Mar 2024 23:17:59 +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=1711322280; cv=none; b=gmLalwHqbNlwCNVzvYaOAvYQq4gz2Jz7qqPVcwL3jZy2mXWotpp9FGqDwFe01dzFXD1X8mHHIruJyV7iwKglHQoWjmHISckm6hggjrymfHuYog16Kjtxr99ApayOLrhExXYNzFMCtf8gK2V8njAgq0pJclrr8milOkvSniTDq84= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711322280; c=relaxed/simple; bh=Wb0lZEF+fzsfKq5nbyUbEiq7f5MQZ2qsQZlboYEXHig=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YhYwd0mhgboplfiCfQRLkMUtW1SsFAtv3tyZckALVUqDJ+Ys5YtfapzSYELaVhqjP5cYhbu7DeXGNToVWgh6pWRx78oixBOCAtSz3sKRPg00v1AAxOP16fTjtVjzrFyyEoi+wzM8D7yBrRsFo2keI7QeTOh6sEBGbFXZPzUyp00= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NbvZ+zpT; 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="NbvZ+zpT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A38FFC43390; Sun, 24 Mar 2024 23:17:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711322279; bh=Wb0lZEF+fzsfKq5nbyUbEiq7f5MQZ2qsQZlboYEXHig=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NbvZ+zpTgUsVH6YYCdBdY0eHo6wpSgENIYlweNfMhu0ct/nbCYcscNO9PPC8Zp/gr SCEdXcA6PYM0k6tlgoM3ScdxWc6bkpvzXQQ427WaHvxjEW1FjdklAGKWsvmNJ8sjRs XxuQBssL10oHVanB0AbYeMDNFuOtH/b80qaUeW7kIn3llRljad8xX7IQ4KuglBa3NZ MCne6Wf2o/wfUgNGhThBzMaiiJRA/22hLAzKdgbBCbnG11GH1OkfPFZXJRwOgfi7TN 9/i+U83lWvBnA1E2pRdxNFIiPikB9nJ6m5+uCi9orOtdSI/PWXA1vhO8xxurGW++g8 nLHIxqWJf82VA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Chao Yu , Jaegeuk Kim , Sasha Levin Subject: [PATCH 6.1 362/451] f2fs: compress: fix to cover f2fs_disable_compressed_file() w/ i_sem Date: Sun, 24 Mar 2024 19:10:38 -0400 Message-ID: <20240324231207.1351418-363-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240324231207.1351418-1-sashal@kernel.org> References: <20240324231207.1351418-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Chao Yu [ Upstream commit 2f9420d3a94aeebd92db88f00f4f2f1a3bd3f6cf ] - f2fs_disable_compressed_file - check inode_has_data - f2fs_file_mmap - mkwrite - f2fs_get_block_locked : update metadata in compressed inode's disk layout - fi->i_flags &= ~F2FS_COMPR_FL - clear_inode_flag(inode, FI_COMPRESSED_FILE); we should use i_sem lock to prevent above race case. Fixes: 4c8ff7095bef ("f2fs: support data compression") Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Sasha Levin --- fs/f2fs/f2fs.h | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 2afb91471b535..a81091a5e282d 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -4367,15 +4367,24 @@ static inline bool f2fs_disable_compressed_file(struct inode *inode) { struct f2fs_inode_info *fi = F2FS_I(inode); - if (!f2fs_compressed_file(inode)) + f2fs_down_write(&F2FS_I(inode)->i_sem); + + if (!f2fs_compressed_file(inode)) { + f2fs_up_write(&F2FS_I(inode)->i_sem); return true; - if (S_ISREG(inode->i_mode) && F2FS_HAS_BLOCKS(inode)) + } + if (f2fs_is_mmap_file(inode) || + (S_ISREG(inode->i_mode) && F2FS_HAS_BLOCKS(inode))) { + f2fs_up_write(&F2FS_I(inode)->i_sem); return false; + } fi->i_flags &= ~F2FS_COMPR_FL; stat_dec_compr_inode(inode); clear_inode_flag(inode, FI_COMPRESSED_FILE); f2fs_mark_inode_dirty_sync(inode, true); + + f2fs_up_write(&F2FS_I(inode)->i_sem); return true; } -- 2.43.0