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mailbox-test: fix missing mutex unlock 

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Merge tag 'mailbox-fixes-6.4-rc5' of git://git.linaro.org/landing-teams/working/fujitsu/integration

Pull mailbox fix from Jassi Brar:
 "Fix missing mutex unlock in mailbox-test"

* tag 'mailbox-fixes-6.4-rc5' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
  mailbox: mailbox-test: fix a locking issue in mbox_test_message_write()
This commit is contained in:
Linus Torvalds 2023-06-01 11:13:10 -04:00
parent f39dda98bc 8fe72b76db
commit cd69bf361e
1 changed files with 6 additions and 4 deletions
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10
drivers/mailbox/mailbox-test.c
View File

@ -98,6 +98,7 @@ static ssize_t mbox_test_message_write(struct file *filp,
size_t count, loff_t *ppos)
{
struct mbox_test_device *tdev = filp->private_data;
char *message;
void *data;
int ret;
@ -113,12 +114,13 @@ static ssize_t mbox_test_message_write(struct file *filp,
return -EINVAL;
}
mutex_lock(&tdev->mutex);
tdev->message = kzalloc(MBOX_MAX_MSG_LEN, GFP_KERNEL);
if (!tdev->message)
message = kzalloc(MBOX_MAX_MSG_LEN, GFP_KERNEL);
if (!message)
return -ENOMEM;
mutex_lock(&tdev->mutex);
tdev->message = message;
ret = copy_from_user(tdev->message, userbuf, count);
if (ret) {
ret = -EFAULT;