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 95045350D54; Tue, 26 Aug 2025 13:53:27 +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=1756216407; cv=none; b=jlDnn5vsnwyTcPJimNWX/iAvNRhwul6zdZrwRGns0bhdH1jZ8sQwwfRuIt7cO4WzMSq9XeKwASGntnHFKlL98ZvMiOtxHPC+d4hdY0Mh3FMeMZDENal9lS+BT9rNGrcdyvCDPZPZyFvFebo5OmaJARScsrKjBiYC2quriO6IbMM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756216407; c=relaxed/simple; bh=Ndjgbi4f3RS9ordCfxR14N1sGrmXdd7NdO/LNJ+yEds=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AsbIxtLxmJlW0gWCl9fp/rCKWLymk/u+4VTAKfp/OLRaI/tVqQ9pRszXZGc7yY33A/dvwxpBdjIOgsMTvVPAPnHA47g/dC6h5VKxIYJcNu2B/EbzcJxI//JRkgDAu7L17Pg/oyQShTxMjMOc0ZMjU4ivDWqT9LV2CUvBeEZlId8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=fq5AbtFu; 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="fq5AbtFu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26052C4CEF1; Tue, 26 Aug 2025 13:53:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756216407; bh=Ndjgbi4f3RS9ordCfxR14N1sGrmXdd7NdO/LNJ+yEds=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fq5AbtFurDwG/bWYM0kQcgkm2w/YxdwRtncQvzuJoxdYqj6y1ugaAMXINkOtPtiCg ue2qyOXCoFj2aPzABoPyC5HQOAH8BX83NLDfTPdrPq1+pKvDP2otCXSulCWVdMsqr4 6eWpTxtDYWDDlYjFyaGKJmXXxn2kCwiILG5OwFk4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+6e516bb515d93230bc7b@syzkaller.appspotmail.com, Lizhi Xu , Dave Kleikamp , Sasha Levin Subject: [PATCH 5.15 393/644] jfs: truncate good inode pages when hard link is 0 Date: Tue, 26 Aug 2025 13:08:04 +0200 Message-ID: <20250826110956.187077777@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110946.507083938@linuxfoundation.org> References: <20250826110946.507083938@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lizhi Xu [ Upstream commit 2d91b3765cd05016335cd5df5e5c6a29708ec058 ] The fileset value of the inode copy from the disk by the reproducer is AGGR_RESERVED_I. When executing evict, its hard link number is 0, so its inode pages are not truncated. This causes the bugon to be triggered when executing clear_inode() because nrpages is greater than 0. Reported-by: syzbot+6e516bb515d93230bc7b@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=6e516bb515d93230bc7b Signed-off-by: Lizhi Xu Signed-off-by: Dave Kleikamp Signed-off-by: Sasha Levin --- fs/jfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c index 072821b50ab9..e132dafa1b6c 100644 --- a/fs/jfs/inode.c +++ b/fs/jfs/inode.c @@ -145,9 +145,9 @@ void jfs_evict_inode(struct inode *inode) if (!inode->i_nlink && !is_bad_inode(inode)) { dquot_initialize(inode); + truncate_inode_pages_final(&inode->i_data); if (JFS_IP(inode)->fileset == FILESYSTEM_I) { struct inode *ipimap = JFS_SBI(inode->i_sb)->ipimap; - truncate_inode_pages_final(&inode->i_data); if (test_cflag(COMMIT_Freewmap, inode)) jfs_free_zero_link(inode); -- 2.39.5