From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794361580; b=CRAdy31A+doJr8FlIJ8/NYT5lAQegNUS6CeMHMAgFQ76NFST6wT3U6oxY4Sekq7bwVsd 6wEduKT1R8AYfD0pI7EVMHNSFs/cCzuAM+/aFEx/qLaRDvhkN/Naa/Ed1PoR0mUQynbTe I9b8QVExJIjR+sjD/06dtZ1PBKuar12WlsqPBglP/zKAUtivoIBGauUkQWgY+FFsJ88Zf YQ/dNWm6cde4Wz2XHllwhTA1wrkS59eteby9fraqc1BO2SN8d2ZrPQ7YqNUFv9Mb48sqV 0ejEomJLKCOfWgDaAQh62tx1JxnnUowDAWbsbeUMM+hyZp9hZ0k2eC/qvdmwQoh+r/A== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794361580; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=R5wMieI318ntOWFRpsdhCtAG02yIx8pAoBe5+Y5v/So=; b=QifXuTZzAFnPGZqXEgcGtZ55wg639mFTYTxbUJws11b8yyQcd0eBtSCgHayqiGLpM8el zx0OQA8t58e/cgwye/Qg/ZkOPj2VdyPU8z+mXAdGEZ5HLgdlXtjwFkPfUi+RD8EwYzpMR cj/LaAauE7NAjCYJ4DkyHbkbdIaG3oR7JoD6nmRWFjrkgBMAAR5QWC8POUDIXR7OZv2Rg 7tTqlZJguCx/hRRUVUd+B9EtbqPKsoLNsDVQHmXHanEjUP/lbDe5QCzVlQRJ3dVaIjvB0 LTfFQQQffDmqo/xIGwha4iXBsAdBiG5Ed9+yXeaucCCHQLwa88g4DuvadaHGZghxN2Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=B1uJu7wd; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 799A2606A335 for ; Wed, 11 Nov 2026 01:46:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=B1uJu7wd Received: by smtp.kernel.org (Postfix) with ESMTPSA id E675C1F0093D; Wed, 11 Nov 2026 01:46:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794361580; bh=R5wMieI318ntOWFRpsdhCtAG02yIx8pAoBe5+Y5v/So=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=B1uJu7wdBDStlMBB2EJFLTfT5t9oioPKc0I1wsB/+TsiWt9fvuCMfjOQ7EXpAdCMA iYj7R4q/8cEZvEdOl4wZWGQ74lQeCWQPIf+YQe0xJEvs3MQlbYvYCB2xZ16t9mNX0F UwBxyvd0dTXto7s70IGBNajtOjKKOg9XxfhxK6omOtnvSVjy3EILmBGU/B+3DyqBa+ vKBZl30Dnk8CFeMcEBd5hKtt/Yh3DA+f7WTebfipeltU20e7W+RHwBhu16lG1E0AZZ TyKSU1rtu/eTTQrqyFryfYp/5pv8FFdhUk7ZGIDYcpb5GmnO/SOBFH0casi9lqrO4H P02r7YGQLgxBQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Takashi Iwai , Sasha Levin Subject: [PATCH 6.6.y 4/4] ALSA: emux: Stop voices before freeing zones in all cases Date: Tue, 10 Nov 2026 20:46:16 -0500 Message-ID: <20261111014442.403245-4-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261111014442.403245-1-sashal@kernel.org> References: <20261107053715-failed-6.6-8a5d87c2ba30@kernel.org> <20261111014442.403245-1-sashal@kernel.org> X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Takashi Iwai [ Upstream commit 8a5d87c2ba30e8de31cfbe888fd4d95f43c63db9 ] The emux voice caches the soundfont zone pointer in vp->zone, which is referred to later, e.g. in snd_emux_send_effect(). For avoiding dangling pointers, the soundfont code calls the sample_reset callback to stop all voices before freeing zones. However, in a few cases (e.g. emu10k1's missing sample_reset or the call path via remove_info()), the sample reset isn't called properly, leaving the playing voices. Fix it by always registering the sample_reset callback, falling back to snd_emux_terminate_all() when the driver has no own ops, and by calling sample_reset in remove_info() before freeing the zones. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20261020101624.205638-2-tiwai@suse.de Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/synth/emux/emux.c | 10 +++++++--- sound/synth/emux/soundfont.c | 9 +++++++++ 2 files changed, 16 insertions(+), 3 deletions(-) diff --git a/sound/synth/emux/emux.c b/sound/synth/emux/emux.c index 7966590f2edbc..97b930f0fd041 100644 --- a/sound/synth/emux/emux.c +++ b/sound/synth/emux/emux.c @@ -71,7 +71,12 @@ static int sf_sample_free(void *private_data, struct snd_sf_sample *sp, static void sf_sample_reset(void *private_data) { struct snd_emux *emu = private_data; - emu->ops.sample_reset(emu); + + /* stop all voices that might refer to zones and samples to be freed */ + if (emu->ops.sample_reset) + emu->ops.sample_reset(emu); + else + snd_emux_terminate_all(emu); } int snd_emux_register(struct snd_emux *emu, struct snd_card *card, int index, char *name) @@ -96,8 +101,7 @@ int snd_emux_register(struct snd_emux *emu, struct snd_card *card, int index, ch sf_cb.private_data = emu; sf_cb.sample_new = sf_sample_new; sf_cb.sample_free = sf_sample_free; - if (emu->ops.sample_reset) - sf_cb.sample_reset = sf_sample_reset; + sf_cb.sample_reset = sf_sample_reset; emu->sflist = snd_sf_new(&sf_cb, emu->memhdr); if (emu->sflist == NULL) return -ENOMEM; diff --git a/sound/synth/emux/soundfont.c b/sound/synth/emux/soundfont.c index c803c5c756114..b151a53a7066c 100644 --- a/sound/synth/emux/soundfont.c +++ b/sound/synth/emux/soundfont.c @@ -483,6 +483,15 @@ remove_info(struct snd_sf_list *sflist, struct snd_soundfont *sf, struct snd_sf_zone *prev, *next, *p; int removed = 0; + /* stop voices before freeing the zones they might refer to */ + for (p = sf->zones; p; p = p->next) { + if (!p->mapped && p->bank == bank && p->instr == instr) { + if (sflist->callback.sample_reset) + sflist->callback.sample_reset(sflist->callback.private_data); + break; + } + } + prev = NULL; for (p = sf->zones; p; p = next) { next = p->next; -- 2.53.0