Commit 598165f1 authored by Hangyu Hua's avatar Hangyu Hua Committed by Lee Jones
Browse files

UPSTREAM: usb: gadget: clear related members when goto fail

commit 501e38a5


dev->config and dev->hs_config and dev->dev need to be cleaned if
dev_config fails to avoid UAF.

Bug: 220261709
Acked-by: default avatarAlan Stern <>
Signed-off-by: default avatarHangyu Hua <>

Signed-off-by: default avatarGreg Kroah-Hartman <>
Signed-off-by: Lee  Jones's avatarLee Jones <>
Change-Id: I149a16bc8db7262c3ab9c2f72a0f10c6caebee83
parent 9901d8bd
......@@ -1878,8 +1878,8 @@ dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
value = usb_gadget_probe_driver(&gadgetfs_driver);
if (value != 0) {
kfree (dev->buf);
dev->buf = NULL;
goto fail;
} else {
/* at this point "good" hardware has for the first time
* let the USB the host see us. alternatively, if users
......@@ -1896,6 +1896,9 @@ dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
return value;
dev->config = NULL;
dev->hs_config = NULL;
dev->dev = NULL;
spin_unlock_irq (&dev->lock);
pr_debug ("%s: %s fail %zd, %p\n", shortname, __func__, value, dev);
kfree (dev->buf);
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