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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-09 19:02:15 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-14 10:16:56 +0100 |
| commit | d8cd524ae4ec788011a14be17503fc224f260fe3 (patch) | |
| tree | 81e53f114ccf4f02df86c55ec3cea0e6704e748a | |
| parent | e7c8afee149134b438df153b09af7fd928a8bc24 (diff) | |
| download | linux-stable-d8cd524ae4ec788011a14be17503fc224f260fe3.tar.gz linux-stable-d8cd524ae4ec788011a14be17503fc224f260fe3.tar.bz2 linux-stable-d8cd524ae4ec788011a14be17503fc224f260fe3.zip | |
USB: gadget: zero allocate endpoint 0 buffers
commit 86ebbc11bb3f60908a51f3e41a17e3f477c2eaa3 upstream.
Under some conditions, USB gadget devices can show allocated buffer
contents to a host. Fix this up by zero-allocating them so that any
extra data will all just be zeros.
Reported-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Tested-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/gadget/composite.c | 2 | ||||
| -rw-r--r-- | drivers/usb/gadget/legacy/dbgp.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index 7726ae25b091..bcebec17bdd5 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -2191,7 +2191,7 @@ int composite_dev_prepare(struct usb_composite_driver *composite, if (!cdev->req) return -ENOMEM; - cdev->req->buf = kmalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL); + cdev->req->buf = kzalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL); if (!cdev->req->buf) goto fail; diff --git a/drivers/usb/gadget/legacy/dbgp.c b/drivers/usb/gadget/legacy/dbgp.c index ed19c12bea25..f1c5a22704b2 100644 --- a/drivers/usb/gadget/legacy/dbgp.c +++ b/drivers/usb/gadget/legacy/dbgp.c @@ -136,7 +136,7 @@ static int dbgp_enable_ep_req(struct usb_ep *ep) goto fail_1; } - req->buf = kmalloc(DBGP_REQ_LEN, GFP_KERNEL); + req->buf = kzalloc(DBGP_REQ_LEN, GFP_KERNEL); if (!req->buf) { err = -ENOMEM; stp = 2; |