From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 BE6545221EA for ; Wed, 16 Sep 2026 16:48:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789577314; cv=none; b=O04QqlLf8EHbe4zQO4Gp2KmjR2a8d5tHYshYHytckwddjmi2lQpoh+jGN4/qGslXh+74667zxVKfI9oQ6Zhb7KONnKDXuNt/2cykne46wy+JZh5kwfOi15ha3DhmuETLhaRxhDtbSao7hHKjLnZSgsjNGz8Mvw5tLeP8M6dzVA0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789577314; c=relaxed/simple; bh=3i92DuYaL/6G71JjAeIN2b7O5naAJWEy6NXq6RVlEyI=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=J/fHvye+zXgBzhXpHren+YIGw9HZxsyda7G+A89x5tWDeaCHhozKW1uLtCLzC0+gqJaYbeMtBCzxp6PXbfwNToW7omqS3wnuWCCp5TDtT6Ld3H33vy7T33KH0lM6PkIiIJxJcw57OqjF5ODCjKRkJVCsKBkCg1t0nVGuceO0Krc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PtTMk01B; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="PtTMk01B" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 04C921F00898; Wed, 16 Sep 2026 16:48:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789577303; bh=uqz1YxiBNsjW4Dc/x6xqqmnYhywXYhha1zvMHIJ1Zsc=; h=Subject:To:Cc:From:Date; b=PtTMk01BOXSmTXybwZJMTuYqMircDA+YWgFADCZfKnVMAalDaYOd+lo2xgyMGi9qp FGfhoZb0amU8POrZdd2ZAHCEIWgzoFMX37PiKP8iGwYPoxqV246W/+eGyMD4nydEze ktRXcGeyYq0pSP/D1IGF90t6ihNSxzActYBJcAtA= Subject: FAILED: patch "[PATCH] smb: client: fix uid/gid override in getattr with posix" failed to apply to 5.15-stable tree To: pc@manguebit.org,arthur.lesuisse@ulb.be,bharathsm@microsoft.com,linkinjeon@kernel.org,ronniesahlberg@gmail.com,sprasad@microsoft.com,tom@talpey.com Cc: From: Date: Wed, 16 Sep 2026 17:42:36 +0100 Message-ID: <2026091635-untwist-absently-462b@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x cf4d35896621b7298eef51b7a465e5c0cb22f670 # git commit -s git send-email --to '' --in-reply-to '2026091635-untwist-absently-462b@gregkh' --subject-prefix 'PATCH 5.15.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From cf4d35896621b7298eef51b7a465e5c0cb22f670 Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Sun, 6 Sep 2026 14:39:44 -0300 Subject: [PATCH] smb: client: fix uid/gid override in getattr with posix extensions When mounting with 'multiuser,posix' options, cifs_getattr() overrides the server-provided uid/gid with the current process's fsuid/fsgid. This is because the condition only checks for unix extensions (tcon->unix_ext) but not posix extensions (tcon->posix_extensions). With SMB3 POSIX extensions, the server provides real uid/gid values just like with unix extensions, so they should be preserved rather than replaced with the caller's credentials. Add a tcon->posix_extensions check to the condition so that uid/gid from the server are properly reported in stat results. Reported-by: Arthur Lesuisse Closes: https://lore.kernel.org/r/DB9P190MB2012266F6B8DECBE5D26A1798DB52@DB9P190MB2012.EURP190.PROD.OUTLOOK.COM Suggested-by: Arthur Lesuisse Reviewed-by: Namjae Jeon Signed-off-by: Paulo Alcantara Cc: Ronnie Sahlberg Cc: Shyam Prasad N Cc: Tom Talpey Cc: Bharath SM Cc: stable@vger.kernel.org diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c index 12ed8db10e00..49f9993ad567 100644 --- a/fs/smb/client/inode.c +++ b/fs/smb/client/inode.c @@ -2992,14 +2992,14 @@ int cifs_getattr(struct mnt_idmap *idmap, const struct path *path, stat->attributes |= STATX_ATTR_ENCRYPTED; /* - * If on a multiuser mount without unix extensions or cifsacl being - * enabled, and the admin hasn't overridden them, set the ownership - * to the fsuid/fsgid of the current process. + * If on a multiuser mount without unix extensions, posix extensions + * or cifsacl being enabled, and the admin hasn't overridden them, + * set the ownership to the fsuid/fsgid of the current process. */ sbflags = cifs_sb_flags(cifs_sb); if ((sbflags & CIFS_MOUNT_MULTIUSER) && !(sbflags & CIFS_MOUNT_CIFS_ACL) && - !tcon->unix_ext) { + !tcon->unix_ext && !tcon->posix_extensions) { if (!(sbflags & CIFS_MOUNT_OVERR_UID)) stat->uid = current_fsuid(); if (!(sbflags & CIFS_MOUNT_OVERR_GID))