Commit Graph

15 Commits

Author SHA1 Message Date
Kees Cook
b382a5c3c5 USB: chaoskey: Use kasprintf() over strcpy()/strcat()
Instead of kmalloc() with manually calculated values followed by
multiple strcpy()/strcat() calls, just fold it all into a single
kasprintf() call.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-02-22 15:17:05 +01:00
Gustavo A. R. Silva
32366fc9fe USB: misc: chaoskey: Use true and false for boolean values
Assign true or false to boolean variables instead of an integer value.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-24 08:49:51 +01:00
Greg Kroah-Hartman
5d62afbe95 USB: misc: Remove redundant license text
Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Keith Packard <keithp@keithp.com>
Cc: Juergen Stuber <starblue@users.sourceforge.net>
Cc: Cesar Miquel <miquel@df.uba.ar>
Cc: Richard Leitner <richard.leitner@skidata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-04 11:55:38 +01:00
Greg Kroah-Hartman
5fd54ace47 USB: add SPDX identifiers to all remaining files in drivers/usb/
It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the drivers/usb/ and include/linux/usb* files with the correct
SPDX license identifier based on the license text in the file itself.
The SPDX identifier is a legally binding shorthand, which can be used
instead of the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Acked-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-04 11:48:02 +01:00
Greg Kroah-Hartman
c35c376fb1 USB: misc: remove unneeded MODULE_VERSION() usage
MODULE_VERSION is useless for in-kernel drivers, so just remove all
usage of it in the USB misc drivers.  Along with this, some
DRIVER_VERSION macros were removed as they are also pointless.

Cc: Keith Packard <keithp@keithp.com>
Cc: Juergen Stuber <starblue@users.sourceforge.net>
Cc: Cesar Miquel <miquel@df.uba.ar>
Acked-by: Richard Leitner <richard.leitner@skidata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-07-22 15:56:52 +02:00
Johan Hovold
63afd5cc78 USB: chaoskey: fix Alea quirk on big-endian hosts
Add missing endianness conversion when applying the Alea timeout quirk.

Found using sparse:

	warning: restricted __le16 degrades to integer

Fixes: e4a886e811 ("hwrng: chaoskey - Fix URB warning due to timeout on Alea")
Cc: stable <stable@vger.kernel.org>     # 4.8
Cc: Bob Ham <bob.ham@collabora.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-17 11:27:41 +02:00
Johan Hovold
a8bbb0f8db USB: chaoskey: refactor endpoint retrieval
Use the new endpoint helpers to lookup the required bulk-in endpoint.

Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-23 13:53:16 +01:00
Julien Cristau
6fbbcf3873 hwrng: chaoskey - drop workaround for old hwrng core limitation
The hwrng core used to mask 'quality' with 1023; that has been removed
in commit 506bf0c046 ("hwrng: core - allow
perfect entropy from hardware devices"), so we can now just set quality
to 1024.

Signed-off-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-24 15:17:51 +02:00
Bob Ham
e4a886e811 hwrng: chaoskey - Fix URB warning due to timeout on Alea
The first read on an Alea takes about 1.8 seconds, more than the
timeout value waiting for the read.  As a consequence, later URB reuse
causes the warning given below.  To avoid this, we increase the wait
time for the first read on the Alea.

[   78.293247] WARNING: CPU: 3 PID: 1892 at drivers/usb/core/urb.c:338 usb_submit_urb+0x2b4/0x580 [usbcore]
[   78.293250] URB ffff8802135be3c0 submitted while active
[   78.293252] Modules linked in: chaoskey(+) rng_core rfcomm binfmt_misc bnep cfg80211 nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc bridge stp llc tun snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vendor_support nls_utf8 nls_cp437 vfat fat intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel efi_pstore kvm irqbypass pcspkr btusb btrtl btbcm btintel uvcvideo joydev bluetooth videobuf2_vmalloc videobuf2_memops efivars videobuf2_v4l2 serio_raw i2c_i801 videobuf2_core videodev cdc_mbim media lpc_ich shpchp mfd_core cdc_ncm usbnet mii cdc_wdm cdc_acm evdev snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core i915 snd_pcm snd_timer i2c_algo_bit drm_kms_helper wmi thinkpad_acpi drm nvram mei_me mei snd soundcore rfkill ac battery i2c_core
[   78.293335]  video button tpm_tis tpm fuse parport_pc ppdev lp parport autofs4 ext4 crc16 jbd2 mbcache algif_skcipher af_alg hid_generic usbhid hid dm_crypt dm_mod sg sr_mod cdrom sd_mod crct10dif_pclmul crc32_pclmul crc32c_intel jitterentropy_rng sha256_generic hmac drbg aesni_intel xhci_pci aes_x86_64 ahci glue_helper xhci_hcd ehci_pci lrw libahci gf128mul ablk_helper cryptd libata sdhci_pci psmouse sdhci scsi_mod ehci_hcd mmc_core usbcore usb_common thermal
[   78.293402] CPU: 3 PID: 1892 Comm: hwrng Not tainted 4.7.0-rc1-linux-14+ #16
[   78.293405] Hardware name: LENOVO 232577G/232577G, BIOS G2ET92WW (2.52 ) 02/22/2013
[   78.293408]  0000000000000000 ffffffff812dfa0f ffff8801fa5b3d68 0000000000000000
[   78.293413]  ffffffff81072224 ffff8802135be3c0 ffff8801fa5b3db8 ffff880212e44210
[   78.293418]  0000000000000040 ffff880209fb32c0 ffff880212e44200 ffffffff8107228f
[   78.293422] Call Trace:
[   78.293432]  [<ffffffff812dfa0f>] ? dump_stack+0x5c/0x7d
[   78.293437]  [<ffffffff81072224>] ? __warn+0xc4/0xe0
[   78.293441]  [<ffffffff8107228f>] ? warn_slowpath_fmt+0x4f/0x60
[   78.293451]  [<ffffffff810a46a2>] ? enqueue_task_fair+0xcd2/0x1260
[   78.293463]  [<ffffffffa001ec54>] ? usb_submit_urb+0x2b4/0x580 [usbcore]
[   78.293474]  [<ffffffff8140c2e5>] ? __pm_runtime_resume+0x55/0x70
[   78.293484]  [<ffffffffa0825212>] ? _chaoskey_fill+0x132/0x250 [chaoskey]
[   78.293485] usbcore: registered new interface driver chaoskey
[   78.293493]  [<ffffffff810aed50>] ? wait_woken+0x90/0x90
[   78.293500]  [<ffffffffa06448c0>] ? devm_hwrng_register+0x80/0x80 [rng_core]
[   78.293505]  [<ffffffffa0825907>] ? chaoskey_rng_read+0x127/0x140 [chaoskey]
[   78.293511]  [<ffffffffa06448c0>] ? devm_hwrng_register+0x80/0x80 [rng_core]
[   78.293515]  [<ffffffffa064492e>] ? hwrng_fillfn+0x6e/0x120 [rng_core]
[   78.293520]  [<ffffffff8108fb5f>] ? kthread+0xcf/0xf0
[   78.293529]  [<ffffffff81596d5f>] ? ret_from_fork+0x1f/0x40
[   78.293535]  [<ffffffff8108fa90>] ? kthread_park+0x50/0x50

Signed-off-by: Bob Ham <bob.ham@collabora.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-06-07 18:42:44 +08:00
Bob Ham
d3ede2dba3 hwrng: chaoskey - Add support for Araneus Alea I USB RNG
Adds support for the Araneus Alea I USB hardware Random Number
Generator which is interfaced with in exactly the same way as the
Altus Metrum ChaosKey.  We just add the appropriate device ID and
modify the config help text.

Signed-off-by: Bob Ham <bob.ham@collabora.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-06-07 18:42:43 +08:00
Oliver Neukum
0ca10122ca usb/misc/chaoskey: introduce an URB for asynchronous reads
To allow for and clean handling of signals an URB is introduced.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-20 20:12:21 -08:00
Oliver Neukum
0a15e24c27 usb/misc/chaoskey: Cleanup probe failure paths
Shares the cleanup code between all probe failure paths, instead of
having per-failure cleanup at each point in the function.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-20 20:12:21 -08:00
Alexander Inyukhin
1d5c47f555 USB: chaoskey read offset bug
Rng reads in chaoskey driver could return the same data under
the certain conditions.

Signed-off-by: Alexander Inyukhin <shurick@sectorb.msk.ru>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-04 11:01:13 +01:00
Keith Packard
8b86ed078a usb: Fix warnings in chaoskey driver
>    drivers/usb/misc/chaoskey.c: In function 'chaoskey_read':
> >> drivers/usb/misc/chaoskey.c:412:3: error: implicit declaration of function 'copy_to_user'
> >> [-Werror=implicit-function-declaration]
>       remain = copy_to_user(buffer, dev->buf + dev->used, this_time);

I was unable to reproduce this locally, but added an explicit

	#include <linux/uaccess.h>

which should ensure the definition on all architectures.

> sparse warnings: (new ones prefixed by >>)
>
> >> drivers/usb/misc/chaoskey.c:117:30: sparse: incorrect type in assignment (different base types)
>    drivers/usb/misc/chaoskey.c:117:30:    expected int [signed] size
>    drivers/usb/misc/chaoskey.c:117:30:    got restricted __le16 [usertype] wMaxPacketSize

Switched the code to using the USB descriptor accessor functions.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-01 14:00:11 +02:00
Keith Packard
66e3e59189 usb: Add driver for Altus Metrum ChaosKey device (v2)
This is a hardware random number generator. The driver provides both a
/dev/chaoskeyX entry and hooks the entropy source up to the kernel
hwrng interface. More information about the device can be found at
http://chaoskey.org

The USB ID for ChaosKey was allocated from the OpenMoko USB vendor
space and is visible as 'USBtrng' here:

http://wiki.openmoko.org/wiki/USB_Product_IDs

v2: Respond to review from Oliver Neukum <oneukum@suse.de>

 * Delete extensive debug infrastructure and replace it with calls to
   dev_dbg.

 * Allocate I/O buffer separately from device structure to obey
   requirements for non-coherant architectures.

 * Initialize mutexes before registering device to ensure that open
   cannot be invoked before the device is ready to proceed.

 * Return number of bytes read instead of -EINTR when partial read
   operation is aborted due to a signal.

 * Make sure device mutex is unlocked in read error paths.

 * Add MAINTAINERS entry for the driver

Signed-off-by: Keith Packard <keithp@keithp.com>
Cc: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-26 10:47:11 +01:00