From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from markus.defensec.nl (markus.defensec.nl [45.80.168.93]) (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 293DA27703 for ; Sat, 25 Jul 2026 07:10:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.80.168.93 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784963420; cv=none; b=Wys/EJeyPwI1Yxcg6TAVm6Z2pfJC7JXhjJQtTL0XdYshin/uidhvhRDRQeURBVImDpSnGHiUZXgF/DGkPGoMhOxdRn/SwezXtZtbEOdbDZ3y1gCSApwkBQ5z3hPcY4/I8xOSCaTQ2PMsh40B2VHlsULA5E/UmYyYclLF91Irpw4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784963420; c=relaxed/simple; bh=Rv7Gl9rXAUnWwqbjg5gQ1WVzHYElsldA+VhuH4/Yxts=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=ZJD3U/MozaHADW/KITHA1C/JPybWnCHcrgHl8I+Y6usiWIZyU79B2kTz1EfliBsrhJxUdA9iQoI6XmQJ2QNo57SnHV6M6pN7QYlQcKi8uIEXavfAxV2qtXRV9a7sdXCq5Z08eP1w6FKS1bYU2MOAzurO4WT1ThHlQ86prbk96fw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=defensec.nl; spf=pass smtp.mailfrom=defensec.nl; dkim=pass (1024-bit key) header.d=defensec.nl header.i=@defensec.nl header.b=rHNyz5ZB; arc=none smtp.client-ip=45.80.168.93 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=defensec.nl Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=defensec.nl Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=defensec.nl header.i=@defensec.nl header.b="rHNyz5ZB" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=defensec.nl; s=default; t=1784963029; bh=Rv7Gl9rXAUnWwqbjg5gQ1WVzHYElsldA+VhuH4/Yxts=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=rHNyz5ZB88uwAGSNcoYVPlIYcOe9VaZVxyaLkwI8wlaU72Lw9V/LCTMLeh8k0ISkc OFmiXnbUpnm1TpciNFEzugNhBvnsKWjgWsW1ZdVEFa+UJCAXmHZW0AUmacnUbRUF// p1J9EoQVkH8OLFYnR1Li1EnagBzYEyBB+4HXHzHE= Received: from nimbus (nimbus.defensec.nl [IPv6:2a10:3781:2099::514]) by markus.defensec.nl (Postfix) with ESMTPSA id D62342D6E75; Sat, 25 Jul 2026 09:03:49 +0200 (CEST) From: Dominick Grift To: Russell Coker Cc: selinux-refpolicy@vger.kernel.org Subject: Re: mpv and kitty terminal emulator on Wayland In-Reply-To: <1968598.tdWV9SEqCh@dojacat> (Russell Coker's message of "Sat, 25 Jul 2026 16:35:41 +1000") References: <1968598.tdWV9SEqCh@dojacat> Date: Sat, 25 Jul 2026 09:03:49 +0200 Message-ID: <87o6fvbley.fsf@defensec.nl> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: selinux-refpolicy@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Russell Coker writes: > When a paste operation is triggered (middle click on video window) mpv is > having it's file handle sent to kitty, presumably by the wayland system (KDE > in this case). > > Denying this access can cause the source of the paste data (kitty in this > case) to crash. Here's the logs for kitty: > > type=AVC msg=audit(1784959694.829:20780): avc: denied { use } for pid=4712 > comm="kitty" path="pipe:[150412]" dev="pipefs" ino=150412 > scontext=etbe:user_r:user_t:s0-s0:c0.c1023 tcontext=etbe:user_r:mplayer_t:s0- > s0:c0.c1023 tclass=fd permissive=0 > type=AVC msg=audit(1784959694.861:20787): avc: denied { use } for pid=4282 > comm="QThread" path="pipe:[149316]" dev="pipefs" ino=149316 > scontext=etbe:user_r:user_t:s0-s0:c0.c1023 tcontext=etbe:user_r:mplayer_t:s0- > s0:c0.c1023 tclass=fd permissive=0 > type=AVC msg=audit(1784959851.794:22406): avc: denied { use } for pid=17365 > comm="kitty" path="pipe:[166960]" dev="pipefs" ino=166960 > scontext=etbe:user_r:user_t:s0-s0:c0.c1023 tcontext=etbe:user_r:mplayer_t:s0- > s0:c0.c1023 tclass=fd permissive=0 > type=AVC msg=audit(1784959851.822:22409): avc: denied { use } for pid=16312 > comm="WaylandEventThr" path="pipe:[164719]" dev="pipefs" ino=164719 > scontext=etbe:user_r:user_t:s0-s0:c0.c1023 tcontext=etbe:user_r:mplayer_t:s0- > s0:c0.c1023 tclass=fd permissive=0 > type=AVC msg=audit(1784959876.318:22422): avc: denied { use } for pid=10585 > comm="kitty" path="pipe:[165833]" dev="pipefs" ino=165833 > scontext=etbe:user_r:user_t:s0-s0:c0.c1023 tcontext=etbe:user_r:mplayer_t:s0- > s0:c0.c1023 tclass=fd permissive=0 > > Here's the errors from Kitty: > file descriptor expected, object (52), message send(sh) > [7.945] [glfw error 65544]: Wayland: fatal display error: Invalid argument > > Here's the errors from Konsole: > file descriptor expected, object (66), message send(sh) > The Wayland connection experienced a fatal error: Invalid argument > > Here's the logs when the fd use is allowed: > > type=AVC msg=audit(1784960913.928:24443): avc: denied { write } for > pid=25743 comm="WaylandEventThr" path="pipe:[188207]" dev="pipefs" ino=188207 > scontext=etbe:user_r:user_t:s0-s0:c0.c1023 tcontext=etbe:user_r:mplayer_t:s0- > s0:c0.c1023 tclass=fifo_file permissive=0 > type=AVC msg=audit(1784960913.964:24444): avc: denied { write } for > pid=24950 comm="QThread" path="pipe:[190614]" dev="pipefs" ino=190614 > scontext=etbe:user_r:user_t:s0-s0:c0.c1023 tcontext=etbe:user_r:mplayer_t:s0- > s0:c0.c1023 tclass=fifo_file permissive=0 > > So it looks that for Wayland to work in the expected manner without programs > crashing all the time we need to allow every Wayland client domain to use a fd > from every other domain and to have fifo_file rw_inherited_fifo_file_perms > access. According to what I have write_inherited_fifo_file_perms might be enough: # sesearch -A -s wlroots.client.typeattr -t wlroots.client.typeattr -ds allow wlroots.client.typeattr wlroots.client.typeattr:fd use; allow wlroots.client.typeattr wlroots.client.typeattr:fifo_file { append getattr ioctl lock write }; > > Would it be possible to have a SE Linux aware clipboard program to mediate > this? -- gpg --auto-key-locate clear,nodefault,wkd --locate-external-keys dominick.grift@defensec.nl Key fingerprint = FCD2 3660 5D6B 9D27 7FC6 E0FF DA7E 521F 10F6 4098 Dominick Grift Mastodon: @kcinimod@defensec.nl