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b=IO8qH1k8sUTENF8Ml20oDnDGbrSbzOQ3DgWMmUBFVAFN97TK9jnxke3nz9kNxWBy4XDnPo Q5eF1bxqcp74FEBg== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 2BECF593A3; Wed, 6 May 2026 07:57:25 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id Kh5kCWX0+mkpIgAAD6G6ig (envelope-from ); Wed, 06 May 2026 07:57:25 +0000 Date: Wed, 06 May 2026 09:57:24 +0200 Message-ID: <877bpht1gb.wl-tiwai@suse.de> From: Takashi Iwai To: =?ISO-8859-1?Q?C=E1ssio?= Gabriel Cc: Takashi Iwai , Jaroslav Kysela , linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH] ALSA: seq: Fix UMP group 16 filtering In-Reply-To: <20260506-alsa-seq-ump-group16-filter-v1-1-b75160bf6993@gmail.com> References: <20260506-alsa-seq-ump-group16-filter-v1-1-b75160bf6993@gmail.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.2 Mule/6.0 Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; 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DKIM_TRACE(0.00)[suse.de:+] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Queue-Id: 5E9855C12D X-Spam-Level: On Wed, 06 May 2026 05:15:48 +0200, Cássio Gabriel wrote: > > The sequencer UAPI defines group_filter as an unsigned int bitmap. > Bit 0 filters groupless messages and bits 1-16 filter UMP groups 1-16. > > The internal snd_seq_client storage is only unsigned short, so bit 16 > is truncated when userspace sets the filter. The same truncation affects > the automatic UMP client filter used to avoid delivery to inactive > groups, so events for group 16 cannot be filtered. > > Store the internal bitmap as unsigned int and keep both userspace-provided > and automatically generated values limited to the defined UAPI bits. > > Fixes: d2b706077792 ("ALSA: seq: Add UMP group filter") > Cc: stable@vger.kernel.org > Signed-off-by: Cássio Gabriel A good catch! Applied now. thanks, Takashi