From cf5fbe02042e52a5a3d93223770db39002b313c6 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 3 Dec 2020 11:42:10 +0300 Subject: [PATCH] USB: apple-mfi-fastcharge: Fix use after free in probe This code frees "mfi" and then derefences it on the next line to get the error code. Fixes: b0eec52fbe63 ("USB: apple-mfi-fastcharge: Fix kfree after failed kzalloc") Reviewed-by: Bastien Nocera Signed-off-by: Dan Carpenter Link: https://lore.kernel.org/r/X8ik4j8yJitVUyfU@mwanda Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/apple-mfi-fastcharge.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/misc/apple-mfi-fastcharge.c b/drivers/usb/misc/apple-mfi-fastcharge.c index 6dedd5498e8a..ac8695195c13 100644 --- a/drivers/usb/misc/apple-mfi-fastcharge.c +++ b/drivers/usb/misc/apple-mfi-fastcharge.c @@ -178,6 +178,7 @@ static int mfi_fc_probe(struct usb_device *udev) { struct power_supply_config battery_cfg = {}; struct mfi_device *mfi = NULL; + int err; if (!mfi_fc_match(udev)) return -ENODEV; @@ -194,8 +195,9 @@ static int mfi_fc_probe(struct usb_device *udev) &battery_cfg); if (IS_ERR(mfi->battery)) { dev_err(&udev->dev, "Can't register battery\n"); + err = PTR_ERR(mfi->battery); kfree(mfi); - return PTR_ERR(mfi->battery); + return err; } mfi->udev = usb_get_dev(udev);