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authorLinus Torvalds <torvalds@linux-foundation.org>2023-06-01 11:13:10 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2023-06-01 11:13:10 -0400
commitcd69bf361e18091bff20c6f80670911682803650 (patch)
treecb4a2353f43f61d657544a5b191ce750fa32c648 /drivers
parentf39dda98bc7c30c42a0c2c6a51ac726437524583 (diff)
parent8fe72b76db79d694858e872370df49676bc3be8c (diff)
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()
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mailbox/mailbox-test.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c
index c4a705c30331..fc6a12a51b40 100644
--- a/drivers/mailbox/mailbox-test.c
+++ b/drivers/mailbox/mailbox-test.c
@@ -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;