From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Szymon Heidrich <szymon.heidrich@gmail.com>
Subject: [PATCH 4.4 29/37] USB: gadget: zero allocate endpoint 0 buffers
Date: Mon, 13 Dec 2021 10:30:07 +0100 [thread overview]
Message-ID: <20211213092926.328618176@linuxfoundation.org> (raw)
In-Reply-To: <20211213092925.380184671@linuxfoundation.org>
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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>
---
drivers/usb/gadget/composite.c | 2 +-
drivers/usb/gadget/legacy/dbgp.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -2018,7 +2018,7 @@ int composite_dev_prepare(struct usb_com
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;
--- 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
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;
next prev parent reply other threads:[~2021-12-13 9:33 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-13 9:29 [PATCH 4.4 00/37] 4.4.295-rc1 review Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 01/37] HID: introduce hid_is_using_ll_driver Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 02/37] HID: add hid_is_usb() function to make it simpler for USB detection Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 03/37] HID: add USB_HID dependancy to hid-prodikeys Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 04/37] HID: add USB_HID dependancy to hid-chicony Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 05/37] HID: add USB_HID dependancy on some USB HID drivers Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 06/37] HID: wacom: fix problems when device is not a valid USB device Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 07/37] HID: check for valid USB device for many HID drivers Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 08/37] can: sja1000: fix use after free in ems_pcmcia_add_card() Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 09/37] nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 10/37] mm: bdi: initialize bdi_min_ratio when bdi is unregistered Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 11/37] ALSA: ctl: Fix copy of updated id with element read/write Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 12/37] ALSA: pcm: oss: Fix negative period/buffer sizes Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 13/37] ALSA: pcm: oss: Limit the period size to 16MB Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 14/37] ALSA: pcm: oss: Handle missing errors in snd_pcm_oss_change_params*() Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 15/37] tracefs: Have new files inherit the ownership of their parent Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 16/37] can: pch_can: pch_can_rx_normal: fix use after free Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 17/37] libata: add horkage for ASMedia 1092 Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 18/37] wait: add wake_up_pollfree() Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 19/37] binder: use wake_up_pollfree() Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 20/37] signalfd: " Greg Kroah-Hartman
2021-12-13 9:29 ` [PATCH 4.4 21/37] tracefs: Set all files to the same group ownership as the mount option Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 22/37] block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2) Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 23/37] net: cdc_ncm: Allow for dwNtbOutMaxSize to be unset or zero Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 24/37] net: altera: set a couple error code in probe() Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 25/37] net: fec: only clear interrupt of handling queue in fec_enet_rx_queue() Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 26/37] net, neigh: clear whole pneigh_entry at alloc time Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 27/37] net/qla3xxx: fix an error code in ql_adapter_up() Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 28/37] USB: gadget: detect too-big endpoint 0 requests Greg Kroah-Hartman
2021-12-13 9:30 ` Greg Kroah-Hartman [this message]
2021-12-13 9:30 ` [PATCH 4.4 30/37] usb: core: config: fix validation of wMaxPacketValue entries Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 31/37] iio: stk3310: Dont return error code in interrupt handler Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 32/37] iio: mma8452: Fix trigger reference couting Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 33/37] iio: ltr501: Dont return error code in trigger handler Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 34/37] iio: itg3200: Call iio_trigger_notify_done() on error Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 35/37] iio: accel: kxcjk-1013: Fix possible memory leak in probe and remove Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 36/37] irqchip/irq-gic-v3-its.c: Force synchronisation when issuing INVALL Greg Kroah-Hartman
2021-12-13 9:30 ` [PATCH 4.4 37/37] irqchip: nvic: Fix offset for Interrupt Priority Offsets Greg Kroah-Hartman
2021-12-13 10:31 ` [PATCH 4.4 00/37] 4.4.295-rc1 review Pavel Machek
2021-12-13 19:54 ` Guenter Roeck
2021-12-13 20:31 ` Shuah Khan
2021-12-14 8:01 ` Naresh Kamboju
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