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 251051C8602; Wed, 19 Mar 2025 14:39:11 +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=1742395151; cv=none; b=Kv9wl1EE2ayrl2SruVnp2kaE0iL+a6kEQicDa+AePnF4WzlzWBulqi4Ur3Jc+zDlVMNSwAeiWAJoip9O4U+rscgubDBFWvid3H9mQDJyoWq44n1gH0eHBa/BzATxGgTGbBpY57m/fYtUOCjK1xik+XgORhKIoPVJjEd4+xszV4M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742395151; c=relaxed/simple; bh=ue7YCMPK/QyxbPrM1GBc+PyWou6ejFSL0dsIWJmMA6s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eVRYscZ6EsvOg17SxvICCgxVHHXfSgRzeBKY7ecYGejF2/dTVPhT8QRDoaS5X1EUeKBWnVOcMxBGCAKinlNbaAcl+8GC20Ia1mdZF1orXRrzsibKoVlINonySKcM4/vqmUpKwAR4FFh3Y0WW+Ryc6jRCSEV/Uj/DUlYo9AO0uUA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Q3B+kPiz; 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="Q3B+kPiz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EB1E9C4CEE4; Wed, 19 Mar 2025 14:39:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1742395151; bh=ue7YCMPK/QyxbPrM1GBc+PyWou6ejFSL0dsIWJmMA6s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q3B+kPizjCiffJ2yHz7L00cRcadc+bSkMAgIO0c9gJrCk0SM/GVIMzurQ4AK1ky9J y4ECRRp/GDqkntB59Ri2tHpTTJGXXmpalj91wJKah01+AQxZxZux2hv+UhJST3w+E6 eALpwVpo7l8sBaMXZyR6Em/FDR1jbpHegQ6LCx6s= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Enzo Matsumiya , Henrique Carvalho , Steve French , Sasha Levin Subject: [PATCH 6.12 225/231] smb: client: Fix match_session bug preventing session reuse Date: Wed, 19 Mar 2025 07:31:58 -0700 Message-ID: <20250319143032.397309933@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250319143026.865956961@linuxfoundation.org> References: <20250319143026.865956961@linuxfoundation.org> User-Agent: quilt/0.68 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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Henrique Carvalho [ Upstream commit 605b249ea96770ac4fac4b8510a99e0f8442be5e ] Fix a bug in match_session() that can causes the session to not be reused in some cases. Reproduction steps: mount.cifs //server/share /mnt/a -o credentials=creds mount.cifs //server/share /mnt/b -o credentials=creds,sec=ntlmssp cat /proc/fs/cifs/DebugData | grep SessionId | wc -l mount.cifs //server/share /mnt/b -o credentials=creds,sec=ntlmssp mount.cifs //server/share /mnt/a -o credentials=creds cat /proc/fs/cifs/DebugData | grep SessionId | wc -l Cc: stable@vger.kernel.org Reviewed-by: Enzo Matsumiya Signed-off-by: Henrique Carvalho Signed-off-by: Steve French Signed-off-by: Sasha Levin --- fs/smb/client/connect.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c index fb51cdf552061..d327f31b317db 100644 --- a/fs/smb/client/connect.c +++ b/fs/smb/client/connect.c @@ -1873,9 +1873,8 @@ static int match_session(struct cifs_ses *ses, struct smb3_fs_context *ctx, bool match_super) { - if (ctx->sectype != Unspecified && - ctx->sectype != ses->sectype) - return 0; + struct TCP_Server_Info *server = ses->server; + enum securityEnum ctx_sec, ses_sec; if (!match_super && ctx->dfs_root_ses != ses->dfs_root_ses) return 0; @@ -1887,11 +1886,20 @@ static int match_session(struct cifs_ses *ses, if (ses->chan_max < ctx->max_channels) return 0; - switch (ses->sectype) { + ctx_sec = server->ops->select_sectype(server, ctx->sectype); + ses_sec = server->ops->select_sectype(server, ses->sectype); + + if (ctx_sec != ses_sec) + return 0; + + switch (ctx_sec) { + case IAKerb: case Kerberos: if (!uid_eq(ctx->cred_uid, ses->cred_uid)) return 0; break; + case NTLMv2: + case RawNTLMSSP: default: /* NULL username means anonymous session */ if (ses->user_name == NULL) { -- 2.39.5