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Tue, 6 Oct 2026 17:40:03 +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 qpimInMyxWr1eAAAD6G6ig:T5 (envelope-from ); Tue, 06 Oct 2026 17:40:03 +0000 From: Takashi Iwai To: linux-sound@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 4/5] ALSA: core: Fix leaks at snd_card_init() error paths Date: Tue, 6 Oct 2026 19:39:56 +0200 Message-ID: <20261006174002.703431-5-tiwai@suse.de> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20261006174002.703431-1-tiwai@suse.de> References: <20261006174002.703431-1-tiwai@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-4.01 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; DWL_DNSWL_LOW(-1.00)[suse.de:dkim]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:email,suse.de:mid,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCVD_TLS_ALL(0.00)[]; TO_DN_NONE(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.de:+] X-Spam-Score: -4.01 X-Spam-Level: X-Rspamd-Action: no action X-Rspamd-Queue-Id: BCB6D1F797 X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Flag: NO When the snd_card object is initialized internally in snd_card_init(), the error path of card->value_buf allocation returns straightly as an error without invoking the destructor, which would leak resources. Also, the other error paths in snd_card_init() release the card object only via put_device(), and this misses the cleanups that are done in snd_card_disconnect(); namely, the reserved slot bit in snd_cards_lock is never cleared, so the card index remains occupied, and the debugfs directory created for the card is left over. Fix them by calling snd_card_free() at the error path, which performs both the disconnection and the release properly. As snd_card_free() calls snd_device_free_all() internally, the explicit call is dropped, and the error labels are unified. Fixes: 84446536f63d ("ALSA: control: Verify put() result when in debug mode") Reported-by: Sashiko Signed-off-by: Takashi Iwai --- sound/core/init.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/sound/core/init.c b/sound/core/init.c index dbe2acfa59fe..9deb5e920d0d 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -334,7 +334,7 @@ static int snd_card_init(struct snd_card *card, struct device *parent, err = snd_info_card_create(card); if (err < 0) { dev_err(parent, "unable to create card info\n"); - goto __error_ctl; + goto __error; } #ifdef CONFIG_SND_DEBUG @@ -343,16 +343,16 @@ static int snd_card_init(struct snd_card *card, struct device *parent, #endif #ifdef CONFIG_SND_CTL_DEBUG card->value_buf = kmalloc_obj(*card->value_buf); - if (!card->value_buf) - return -ENOMEM; + if (!card->value_buf) { + err = -ENOMEM; + goto __error; + } #endif return 0; - __error_ctl: - snd_device_free_all(card); __error: - put_device(&card->card_dev); - return err; + snd_card_free(card); + return err; } /** -- 2.55.0