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 74DB747DFBA; Sat, 28 Feb 2026 17:33:43 +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=1772300023; cv=none; b=sDt1kHtA/TDwO4usZjU2zpEysjryXM3a37v8M+uYSVBgr/iikhiSSqbcjoHuklk2JhwV+sClVb1fomY0VxM6AnaE9F7AUEfnAbEnGDKwrkOr6vgHuTYyCkkwt7TTpyVYzn+sFEBebX9AUWLEkQdjymt+mR2XKWGkCuQiCrNaT4M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772300023; c=relaxed/simple; bh=jm33/dDTMaejT8REIMFgGYTEkQhfYT6Fqs3geYv2D4I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=irr7/fq4IcEP0EDamajGxkjB2XCeMRMFjBD1LUZF3pKQt7F2edeGd6z47D7bHRbIQhTQMjIXJZEiGGe8CEw/PB2RXuGsRv1ffh3/5aTvA4VU6mNgwncIkHr0qWjSFtqQruH/5sakl1Rxf1Y3ue2y+8HNTbGgluS5atjDtBsAcHc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qoiJQxLt; 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="qoiJQxLt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 67D35C19425; Sat, 28 Feb 2026 17:33:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772300023; bh=jm33/dDTMaejT8REIMFgGYTEkQhfYT6Fqs3geYv2D4I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qoiJQxLtJ4U3IeRjUoDxAmq99jaBThWRxiZhA20kYyGozzMNccqPSQyPa2yfj26CK IyuafeeSH5bFfP8McN3DegCyeFrybxddgmiE739CcTxEVCyscZuuV+OlGMPYyAD8K/ KGNO3aq23Rc6/3OgZna41kyOWVI/hjpZ5UzYR9E2WVE+JpHu3TnSpu6yT3Xx3WISYz 503gnpYO0cFNno5AqcdlywgLVYnpVerJK49W97OX7uSZ82MTateSdnka4ctO281AfO BfQu5VJL2tkkPkzDM9rL5Pid67tMmF2FREb2GNXbvKHZRwXfiQjK09oy/kWl1xu2RC D8IO7tBsh2/Wg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Bhavik Sachdev , Miklos Szeredi , Christian Brauner , Sasha Levin Subject: [PATCH 6.19 034/844] statmount: permission check should return EPERM Date: Sat, 28 Feb 2026 12:19:07 -0500 Message-ID: <20260228173244.1509663-35-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228173244.1509663-1-sashal@kernel.org> References: <20260228173244.1509663-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Bhavik Sachdev [ Upstream commit fccbe38a5d06dbe44bcd89196fe1d2c2272a1f4a ] Currently, statmount() returns ENOENT when caller is not CAP_SYS_ADMIN in the user namespace owner of target mount namespace. This should be EPERM instead. Suggested-by: Miklos Szeredi Signed-off-by: Bhavik Sachdev Link: https://patch.msgid.link/20251129091455.757724-2-b.sachdev1904@gmail.com Signed-off-by: Christian Brauner Signed-off-by: Sasha Levin --- fs/namespace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/namespace.c b/fs/namespace.c index c58674a20cad5..f6879f282daec 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -5780,7 +5780,7 @@ SYSCALL_DEFINE4(statmount, const struct mnt_id_req __user *, req, if (kreq.mnt_ns_id && (ns != current->nsproxy->mnt_ns) && !ns_capable_noaudit(ns->user_ns, CAP_SYS_ADMIN)) - return -ENOENT; + return -EPERM; ks = kmalloc(sizeof(*ks), GFP_KERNEL_ACCOUNT); if (!ks) -- 2.51.0