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 A34303C1986; Wed, 30 Sep 2026 19:03:17 +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=1790794998; cv=none; b=AJS9/qC626G5OBQSKZIT110nDuWYMU51betgYgC2/STzZazHIHeesEuneg4dpkgYaLN+XsE3NYgYIpqhKa5wZ1tMD87omXh6TlXYzIE6EvbDggdOGKCjQp+GwxfKmXfUKQTVOCjT5WSEj1c7F2oKi2Owiiuu7Ahy9YYhc5hU9HA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790794998; c=relaxed/simple; bh=l4YYD+mucxrQyLvajHsrrZpln6IvnBaUQ1+rMuG9tNU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=c3afK4tUzEGbl3mkzZ/iZQvvVtmDh+SSSLqsssYAOGCNWIvugIpOggNnbq2SrRSUnrED5U2OEr/Dmw7sD/KamDr4XnJRzPxsG1fUbq5qWO+Cy6t8qTOL927+f1o5TGgF3kVCPqVUYEX69P/Y3j03go8NH80lY52p6m7MlEwIWCA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=SU5XLQba; 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="SU5XLQba" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0B50E1F000FF; Wed, 30 Sep 2026 19:03:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790794997; bh=VmE9anP6nXwjtDSfx0o7pppqblt9Aax2gnEm97Q2k00=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=SU5XLQbaIFFxlfRV7pyE5OgV+TCaS5fkhi6fVCJZ+CXCoo9vRqp+AezRYi3oVvIbp CxHDtuF00Q6qjUBvunvOhjLaJv1I+4K77l6V0fVyJPBKWEN+cNuqNJl2VRcPWLiY7Y r7HQ8SS/QUlxte3fc4dwZwHUSFe8MLkNNBCnubPI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Cheryl Babcock , Namjae Jeon , Sasha Levin Subject: [PATCH 6.6 0406/1193] ksmbd: rate limit unmapped SID errors Date: Wed, 30 Sep 2026 17:18:10 +0200 Message-ID: <20260930152443.216055184@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152434.301151190@linuxfoundation.org> References: <20260930152434.301151190@linuxfoundation.org> User-Agent: quilt/0.69 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Namjae Jeon [ Upstream commit feca5e70fc963b088377b20879e8cd8237c2fd7d ] A client can include many structurally valid but unmapped SIDs in a DACL. Logging every mapping failure lets one request generate hundreds of kernel error messages. Rate limit the message to prevent an authenticated client from flooding the kernel log. Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") Reported-by: Cheryl Babcock Signed-off-by: Namjae Jeon Signed-off-by: Sasha Levin --- fs/smb/server/smbacl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/smb/server/smbacl.c b/fs/smb/server/smbacl.c index 3056634d0b4b5..b68b63a3195fa 100644 --- a/fs/smb/server/smbacl.c +++ b/fs/smb/server/smbacl.c @@ -521,8 +521,8 @@ static void parse_dacl(struct mnt_idmap *idmap, temp_fattr.cf_uid = INVALID_UID; ret = sid_to_id(idmap, &ppace[i]->sid, SIDOWNER, &temp_fattr); if (ret || uid_eq(temp_fattr.cf_uid, INVALID_UID)) { - pr_err("%s: Error %d mapping Owner SID to uid\n", - __func__, ret); + pr_err_ratelimited("%s: Error %d mapping Owner SID to uid\n", + __func__, ret); continue; } -- 2.53.0