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 5194F2141A4; Tue, 12 Nov 2024 10:45:17 +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=1731408317; cv=none; b=r/60Jy3wFk1nFVwC50nBElHQkpkDM2zO99ZuNBRBEofaxY78ZLJOG57cvEKF2sAiVEe8FfSklzM5Wk0lVHgYviYmps/rTxhVAaDalmSQgIALC2uDcO96Y11t3BaFWK/qLgXw3D1tKr4LUuCf2AEt9OmM1KXNQY6NrU0OkoZfLa4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731408317; c=relaxed/simple; bh=IrYdpeEkbmiV6NN+eQv8avAraMLs0AQd18nIdSv7/lA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=teoarMhUxDQFsdwdm91qHWxKbFo5pJ99HOG+SRBzl4Mc06jUA4aPHH7EoIbk42nlPqvzMiEovFG13O0Xd1Z2wGOGNe+vX+8GdcvdpPeQJ9+WTDvqlq8rF0vtKCemmRzxd1XGJPVY54qCTx2155gkJIAOsp7AVUNQapTJSEwmjMw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=aFyU1hzU; 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="aFyU1hzU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B436AC4CECD; Tue, 12 Nov 2024 10:45:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1731408317; bh=IrYdpeEkbmiV6NN+eQv8avAraMLs0AQd18nIdSv7/lA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aFyU1hzULJwEnDp1seLIAb18lRpmYg7awLFvOp8w/XWqKVbN1pQyReszb1KCRFcIE E+/dpCibsfDnlh8Z0F339f67MEtMLFR/QJ3STyyKk9Nqgjg/nE9BUoitS6ZWG6iWR2 mb/ZM/+1Whsf/9uAnqxwEkTysVwSZdYVi2ivIbgg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Roberto Sassu , Anna Schumaker Subject: [PATCH 6.11 124/184] nfs: Fix KMSAN warning in decode_getfattr_attrs() Date: Tue, 12 Nov 2024 11:21:22 +0100 Message-ID: <20241112101905.624750981@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241112101900.865487674@linuxfoundation.org> References: <20241112101900.865487674@linuxfoundation.org> User-Agent: quilt/0.67 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 6.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Roberto Sassu commit dc270d7159699ad6d11decadfce9633f0f71c1db upstream. Fix the following KMSAN warning: CPU: 1 UID: 0 PID: 7651 Comm: cp Tainted: G B Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009) ===================================================== ===================================================== BUG: KMSAN: uninit-value in decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_generic+0x806/0xb00 nfs4_xdr_dec_getattr+0x1de/0x240 rpcauth_unwrap_resp_decode+0xab/0x100 rpcauth_unwrap_resp+0x95/0xc0 call_decode+0x4ff/0xb50 __rpc_execute+0x57b/0x19d0 rpc_execute+0x368/0x5e0 rpc_run_task+0xcfe/0xee0 nfs4_proc_getattr+0x5b5/0x990 __nfs_revalidate_inode+0x477/0xd00 nfs_access_get_cached+0x1021/0x1cc0 nfs_do_access+0x9f/0xae0 nfs_permission+0x1e4/0x8c0 inode_permission+0x356/0x6c0 link_path_walk+0x958/0x1330 path_lookupat+0xce/0x6b0 filename_lookup+0x23e/0x770 vfs_statx+0xe7/0x970 vfs_fstatat+0x1f2/0x2c0 __se_sys_newfstatat+0x67/0x880 __x64_sys_newfstatat+0xbd/0x120 x64_sys_call+0x1826/0x3cf0 do_syscall_64+0xd0/0x1b0 entry_SYSCALL_64_after_hwframe+0x77/0x7f The KMSAN warning is triggered in decode_getfattr_attrs(), when calling decode_attr_mdsthreshold(). It appears that fattr->mdsthreshold is not initialized. Fix the issue by initializing fattr->mdsthreshold to NULL in nfs_fattr_init(). Cc: stable@vger.kernel.org # v3.5.x Fixes: 88034c3d88c2 ("NFSv4.1 mdsthreshold attribute xdr") Signed-off-by: Roberto Sassu Signed-off-by: Anna Schumaker Signed-off-by: Greg Kroah-Hartman --- fs/nfs/inode.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -1656,6 +1656,7 @@ void nfs_fattr_init(struct nfs_fattr *fa fattr->gencount = nfs_inc_attr_generation_counter(); fattr->owner_name = NULL; fattr->group_name = NULL; + fattr->mdsthreshold = NULL; } EXPORT_SYMBOL_GPL(nfs_fattr_init);