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firewire: cdev: fix potential leak of kernel stack due to uninitialized value

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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 <dan.carpenter@oracle.com>
Fixes: baa914cd81 ("firewire: add kernel API to access CYCLE_TIME register")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20220512112037.103142-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2022-05-12 20:20:37 +09:00 committed by Takashi Iwai
parent 56ec3e755b
commit dda8ad0aa8
1 changed files with 1 additions and 1 deletions
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2
drivers/firewire/core-cdev.c
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@ -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();