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 981EE21C9FF; Tue, 17 Jun 2025 10:57:17 +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=1750157837; cv=none; b=QotS+I8yOXqUW+j7yXCGnIZErQgt6oH+3zR9dPo+gMvehO/XJ9kw3UfIriiuKMdsbO9r7FMK4khHROWjGY3FBnYAvf4IW9I4WxTEH1aoCaS9c/361eU5Mhd72UyqxansPsrilnSiGxexcrg/R9h91Ot2RhPGMfh8clIN4i64/UU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750157837; c=relaxed/simple; bh=NmzERQxeC+Wf2VWr+OrNl8OC5PXA5OvyS6pPpgJXa/s=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=tXjW9rZayHTM7offhIFiRh9/9zRXeXbr34fMV1l0q1Oo1JU1ABJzTVfLTlskCuCv37ClP7rTEgMiFCCC4W491+UUTvxidWE1m/m04/NDQAcYQlGU3QkaeRvMwTE3BkcJkU04qIo5RJHMmbsUH/f6jatfZG0XRrXH3ZLXWj7J9/E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=p0hzfsPK; 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="p0hzfsPK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5ACF6C4CEE3; Tue, 17 Jun 2025 10:57:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750157837; bh=NmzERQxeC+Wf2VWr+OrNl8OC5PXA5OvyS6pPpgJXa/s=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=p0hzfsPK4/Yb2c8CGIiL6DAnK1zyOrJJc2OmgspqEekT3SP2COHx7lr9H5a0/PjZ7 /2wo08+//cLL+UDwNAJTkDuoBQ1yQNchmOv8DiNw95ueP6+7+73Ls+GuTQsfTgVcYA WQ6SDRwzQJfZJE8eXCPTD10tVDH0Rpfd9acjTK3tL3j5zJi7HmQ2tf1dydu/8F04Bb SdkV5ztUzdgJK4y62kFyk97PBoK0YhsYYBtyjVgypVIN/iWaDB7LDRm7i1C6mmjn++ Z2n3PFTsFem52v5xmoMG7p5wczJ5wX7CC33CxzPdkoa7wywE/eVG+UY8OoqoItcAYs wV29K041vspUA== Message-ID: <0ce7c86caaa57d879ef85471414f80692212a6c6.camel@kernel.org> Subject: Re: [PATCH v3][next] NFSD: Avoid multiple -Wflex-array-member-not-at-end warnings From: Jeff Layton To: "Gustavo A. R. Silva" , Chuck Lever , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey Cc: linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Date: Tue, 17 Jun 2025 06:57:15 -0400 In-Reply-To: References: Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 0OX6MYPtv76hka8lW4mnRmZqqx3UtfHX/hF/zH24Gj7A6sYKYLCU3YrI2Ogiu7/ksKcl7goQjpvtV YrOOI5VGLHge0awt7bhMCTM9KAfPc+xL/ZxAMVWd3NCk5SamL2cE99UWgtvNOIYU8m6EjTLhsj8sn VluJH0/RcxEeFbnSaswVChNSGa7mXJrTR22lRL6ZPjdMgS2Km90haWPRc8Wolcz07Y2se0xpGVLEQ cDEsvv5IMmeMe1/qLZ6NaVkNuL3WOXvxaVT9USW1+/SGipO2IpKJjeDZfehlB/kpfF24+RrK+seQf CBYyUE8QJpvTZyfUHNYldXlrjO6n5MdOempLqWpfOmcGkwnyNRBR46g/jf8KnPRwXs509yAqDB6sE 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AaM1LRC28muq91WCFhs/nzHozpbzcheyGtMUI2Ao4K6mnY+3zIuXPygZMFr9KXE6fF7HzKxKuZMJO aEZCiDOq0anx6FmOzs5E6Jqdpo/mtI8beK+BE7Va6ni7YrQlnT0i3vaTVMTiCThbqsB20VrbMjlhp f8lfK1XVNbRq/R7GZ9zHESlsa35ha60yd/j3pu5hT2xyy8krV8vGhHvnJ1XRMJBAB/UYb6FyC7S+m QZIQXVeAA+smfTT0tDrisj1U5x6ZB9b3nBg65kc= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2 (3.56.2-1.fc42) Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Mon, 2025-06-16 at 16:31 -0600, Gustavo A. R. Silva wrote: > Replace flexible-array member with a fixed-size array. >=20 > With this changes, fix many instances of the following type of > warnings: >=20 > fs/nfsd/nfsfh.h:79:33: warning: structure containing a flexible array mem= ber is not at the end of another structure [-Wflex-array-member-not-at-end] > fs/nfsd/state.h:763:33: warning: structure containing a flexible array me= mber is not at the end of another structure [-Wflex-array-member-not-at-end= ] > fs/nfsd/state.h:669:33: warning: structure containing a flexible array me= mber is not at the end of another structure [-Wflex-array-member-not-at-end= ] > fs/nfsd/state.h:549:33: warning: structure containing a flexible array me= mber is not at the end of another structure [-Wflex-array-member-not-at-end= ] > fs/nfsd/xdr4.h:705:33: warning: structure containing a flexible array mem= ber is not at the end of another structure [-Wflex-array-member-not-at-end] > fs/nfsd/xdr4.h:678:33: warning: structure containing a flexible array mem= ber is not at the end of another structure [-Wflex-array-member-not-at-end] >=20 > Signed-off-by: Gustavo A. R. Silva > --- > Changes in v3: > - Replace flexible-array member with a fixed-size array. (NeilBrown) >=20 > Changes in v2: > - Use indices into `fh_raw`. (Christoph) > - Remove union and flexible-array member `fh_fsid`. (Christoph) > - Link: https://lore.kernel.org/linux-hardening/aEoKCuQ1YDs2Ivn0@kspp/ >=20 > v1: > - Link: https://lore.kernel.org/linux-hardening/aBp37ZXBJM09yAXp@kspp/ >=20 > fs/nfsd/nfsfh.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) >=20 > diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h > index 5103c2f4d225..760e77f3630b 100644 > --- a/fs/nfsd/nfsfh.h > +++ b/fs/nfsd/nfsfh.h > @@ -56,7 +56,7 @@ struct knfsd_fh { > u8 fh_auth_type; /* deprecated */ > u8 fh_fsid_type; > u8 fh_fileid_type; > - u32 fh_fsid[]; /* flexible-array member */ > + u32 fh_fsid[NFS4_FHSIZE / 4 - 1]; > }; > }; > }; Reviewed-by: Jeff Layton