From: Connor Kuehl connor.kuehl@canonical.com
[ Upstream commit 955c1532a34305f2f780b47f0c40cc7c65500810 ]
If kzalloc() returns NULL, the error path doesn't stop the flow of control from entering rtw_hal_read_chip_version() which dereferences the null pointer. Fix this by adding a 'goto' to the error path to more gracefully handle the issue and avoid proceeding with initialization steps that we're no longer prepared to handle.
Also update the debug message to be more consistent with the other debug messages in this function.
Addresses-Coverity: ("Dereference after null check")
Signed-off-by: Connor Kuehl connor.kuehl@canonical.com Link: https://lore.kernel.org/r/20190927214415.899-1-connor.kuehl@canonical.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/staging/rtl8188eu/os_dep/usb_intf.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/rtl8188eu/os_dep/usb_intf.c b/drivers/staging/rtl8188eu/os_dep/usb_intf.c index dfee6985efa61..8ef7b44b6abc1 100644 --- a/drivers/staging/rtl8188eu/os_dep/usb_intf.c +++ b/drivers/staging/rtl8188eu/os_dep/usb_intf.c @@ -348,8 +348,10 @@ static struct adapter *rtw_usb_if1_init(struct dvobj_priv *dvobj, }
padapter->HalData = kzalloc(sizeof(struct hal_data_8188e), GFP_KERNEL); - if (!padapter->HalData) - DBG_88E("cant not alloc memory for HAL DATA\n"); + if (!padapter->HalData) { + DBG_88E("Failed to allocate memory for HAL data\n"); + goto free_adapter; + }
/* step read_chip_version */ rtw_hal_read_chip_version(padapter);