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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> | 2021-12-12 13:05:10 +0100 |
| commit | 86ebbc11bb3f60908a51f3e41a17e3f477c2eaa3 (patch) | |
| tree | 8c69a2eed0fa542c57511c5dbde14dc8f7b1f091 /drivers | |
| parent | USB: gadget: detect too-big endpoint 0 requests (diff) | |
| download | linux-dev-86ebbc11bb3f60908a51f3e41a17e3f477c2eaa3.tar.xz linux-dev-86ebbc11bb3f60908a51f3e41a17e3f477c2eaa3.zip | |
USB: gadget: zero allocate endpoint 0 buffers
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>
Diffstat (limited to 'drivers')
| -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 1ef7922b57b6..284eea9f6e4d 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -2221,7 +2221,7 @@ 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 e567afcb2794..355bc7dab9d5 100644 --- a/drivers/usb/gadget/legacy/dbgp.c +++ b/drivers/usb/gadget/legacy/dbgp.c @@ -137,7 +137,7 @@ 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; |