[PATCH 5.19 024/717] xhci: dbc: Fix memory leak in xhci_alloc_dbc()

Greg Kroah-Hartman
2022-10-22T07:35:55Z

From: Rafael Mendonca <rafaelmendsr@gmail.com>

commit d591b32e519603524a35b172156db71df9116902 upstream.

If DbC is already in use, then the allocated memory for the xhci_dbc struct
doesn't get freed before returning NULL, which leads to a memleak.

Fixes: 534675942e90 ("xhci: dbc: refactor xhci_dbc_init()")
Cc: stable@vger.kernel.org
Signed-off-by: Rafael Mendonca <rafaelmendsr@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220921123450.671459-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/host/xhci-dbgcap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/host/xhci-dbgcap.c
+++ b/drivers/usb/host/xhci-dbgcap.c
@@ -988,7 +988,7 @@ xhci_alloc_dbc(struct device *dev, void
dbc->driver = driver;

if (readl(&dbc->regs->control) & DBC_CTRL_DBC_ENABLE)
- return NULL;
+ goto err;

INIT_DELAYED_WORK(&dbc->event_work, xhci_dbc_handle_events);
spin_lock_init(&dbc->lock);