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Thu, 12 May 2022 07:20:39 -0400 (EDT) From: Takashi Sakamoto To: tiwai@suse.de, stefanr@s5r6.in-berlin.de Subject: [PATCH] firewire: cdev: fix potential leak of kernel stack due to uninitialized value Date: Thu, 12 May 2022 20:20:37 +0900 Message-Id: <20220512112037.103142-1-o-takashi@sakamocchi.jp> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Cc: alsa-devel@alsa-project.org, linux1394-devel@lists.sourceforge.net, Dan Carpenter X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Recent change brings potential leak of value on kernel stack to userspace due to uninitialized value. This commit fixes the bug. Reported-by: Dan Carpenter Fixes: baa914cd81f ("firewire: add kernel API to access CYCLE_TIME register") Signed-off-by: Takashi Sakamoto --- drivers/firewire/core-cdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c index 8e9670036e5c..032ee56c34a3 100644 --- a/drivers/firewire/core-cdev.c +++ b/drivers/firewire/core-cdev.c @@ -1211,7 +1211,7 @@ static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; struct fw_card *card = client->device->card; struct timespec64 ts = {0, 0}; - u32 cycle_time; + u32 cycle_time = 0; int ret = 0; local_irq_disable();