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Fri, 19 May 2023 09:31:42 +0000 From: Takashi Iwai To: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 22/36] ALSA: seq: Prohibit creating ports with special numbers Date: Fri, 19 May 2023 11:31:00 +0200 Message-Id: <20230519093114.28813-23-tiwai@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230519093114.28813-1-tiwai@suse.de> References: <20230519093114.28813-1-tiwai@suse.de> MIME-Version: 1.0 Message-ID-Hash: TXFFGCQ2YDAMSAHQ7TC6OMW4ZSD7PQY2 X-Message-ID-Hash: TXFFGCQ2YDAMSAHQ7TC6OMW4ZSD7PQY2 X-MailFrom: tiwai@suse.de X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Some port numbers are special, such as 254 for subscribers and 255 for broadcast. Return error if application tries to create such a port. Signed-off-by: Takashi Iwai Reviewed-by: Jaroslav Kysela --- sound/core/seq/seq_clientmgr.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 2dac8c3355fd..0f26f20596d7 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -1206,6 +1206,8 @@ static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg) port_idx = info->addr.port; else port_idx = -1; + if (port_idx >= SNDRV_SEQ_ADDRESS_UNKNOWN) + return -EINVAL; err = snd_seq_create_port(client, port_idx, &port); if (err < 0) return err;