When using the algif_skcipher, the following call sequence causess a
re-initialization:
1. sendmsg with ALG_SET_OP and iov == NULL, iovlen == 0 (i.e
initializing the cipher, but not sending data)
2. sendmsg with msg->msg-controllen == 0 and iov != NULL (using the initalized
cipher handle by sending data)
In step 2, the cipher operation type (encryption or decryption) is reset
to always decryption, because the local variable of enc is put into
ctx->enc as ctx->user is still zero.
The same applies when all send data is processed and ctx->used falls to
zero followed by user space to send new data.
This patch changes the behavior to only reset the cipher operation type
(and the IV) if such configuration request is received.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
As most (all?) users of algif_skcipher are single-threaded and
therefore always write before reading from an algif_skcipher
socket, they never block and exercise that code-path.
It turns out that code path doesn't even work because we never
reload ctx->used after waking up so we never even see the new
data and immediately return an error (and a loud WARN_ON).
This patch fixes this by always reloading ctx->used.
Reported-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Stephan Mueller <smueller@chronox.de>
Compiler dead store optimization can sometimes remove final calls
to memset() used to clear sensitive data at the end of a function.
Replace trailing memset() calls with memzero_explicit() to
preclude unwanted removal.
Signed-off-by: Nickolaus Woodruff <nickolauswoodruff@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Use the crypto- prefix for the DRBG implementations.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This adds the module loading prefix "crypto-" to the template lookup
as well.
For example, attempting to load 'vfat(blowfish)' via AF_ALG now correctly
includes the "crypto-" prefix at every level, correctly rejecting "vfat":
net-pf-38
algif-hash
crypto-vfat(blowfish)
crypto-vfat(blowfish)-all
crypto-vfat
Reported-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
To allow automatic loading of the crypto_user kernel module, the netlink
MODULE_ALIAS is added.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This can't be NULL and we dereferenced it earlier. Smatch used to
ignore these things where the pointer was obviously non-NULL but I've
found that sometimes the intention was to check something else so we
were maybe missing bugs.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Commit e1bd95bf7c ("crypto: algif - zeroize IV buffer") and
2a6af25bef ("crypto: algif - zeroize message digest buffer")
added memzero_explicit() calls on buffers that are later on
passed back to sock_kfree_s().
This is a discussed follow-up that, instead, extends the sock
API and adds sock_kzfree_s(), which internally uses kzfree()
instead of kfree() for passing the buffers back to slab.
Having sock_kzfree_s() allows to keep the changes more minimal
by just having a drop-in replacement instead of adding
memzero_explicit() calls everywhere before sock_kfree_s().
In kzfree(), the compiler is not allowed to optimize the memset()
away and thus there's no need for memzero_explicit(). Both,
sock_kfree_s() and sock_kzfree_s() are wrappers for
__sock_kfree_s() and call into kfree() resp. kzfree(); here,
__sock_kfree_s() needs to be explicitly inlined as we want the
compiler to optimize the call and condition away and thus it
produces e.g. on x86_64 the _same_ assembler output for
sock_kfree_s() before and after, and thus also allows for
avoiding code duplication.
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This prefixes all crypto module loading with "crypto-" so we never run
the risk of exposing module auto-loading to userspace via a crypto API,
as demonstrated by Mathias Krause:
https://lkml.org/lkml/2013/3/4/70
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Currently all get requests with an empty driver name fail with
EINVAL. Since most users actually want to supply an empty driver
name this patch removes this check.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Add a DT node for the TRNG (True Random Number Generator) block.
Keep this block enabled as it does not depend on any external connection,
and thus should be available on all boards.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Document DT bindings of Atmel's TRNG (True Random Number Generator) IP.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Peter Korsgaard <peter@korsgaard.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Add DT support.
Make the driver depend on CONFIG_OF as at91sam9g45 was the only SoC making
use of the TRNG block and this SoC is now fully migrated to DT.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Peter Korsgaard <peter@korsgaard.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Use clk_prepare_enable/_disable_unprepare instead of clk_enable/disable
to work properly with the CCF.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Peter Korsgaard <peter@korsgaard.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This is a specific implementation, <asm/unaligned.h> is the
multiplexer that has the arch-specific knowledge of which
of the implementations needs to be used, so include that.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This module registers a crc32 algorithm and a crc32c algorithm
that use the optional CRC32 and CRC32C instructions in ARMv8.
Tested on AMD Seattle.
Improvement compared to crc32c-generic algorithm:
TCRYPT CRC32C speed test shows ~450% speedup.
Simple dd write tests to btrfs filesystem show ~30% speedup.
Signed-off-by: Yazen Ghannam <yazen.ghannam@linaro.org>
Acked-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Use the new memzero_explicit function to cleanup sensitive data.
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Fix documentation typo for shash_alg->descsize.
Add documentation for initially uncovered member variables.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Recently lockless_dereference() was added which can be used in place of
hard-coding smp_read_barrier_depends(). The following PATCH makes the change.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Reviewed-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The API function calls exported by the kernel crypto API for
message digests to be used by consumers are documented.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The API function calls exported by the kernel crypto API for
signle block ciphers to be used by consumers are documented.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The API function calls exported by the kernel crypto API for
synchronous block ciphers to be used by consumers are documented.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The API function calls exported by the kernel crypto API for AEAD
ciphers to be used by consumers are documented.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The API function calls exported by the kernel crypto API for
asynchronous block ciphers to be used by consumers are documented.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The data structure of struct crypto_alg together with various other
data structures needed by cipher developers is documented wit all
parameters that can be set by a developer of a transformation. All
parameters that are internal to the crypto API are marked as such.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The API function calls exported by the kernel crypto API for SHASHes
to be used by consumers are documented.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The API function calls exported by the kernel crypto API for AHASHes
to be used by consumers are documented.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The hash data structures needed to be filled in by cipher developers are
documented.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The API function calls exported by the kernel crypto API for RNGs to
be used by consumers are documented.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The userspace interface of the kernel crypto API is documented with
* a general explanation
* a discussion of the memory in-place operation
* the description of the message digest API
* the description of the symmetric cipher API
The documentation refers to libkcapi as a working example on how to use
the kernel crypto API from user space.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Add the crypto API documentation into the DocBook Makefile to allow it
being compiled
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The design of the kernel crypto API as well as hints to program with
the kernel crypto API are given.
The documentation contains:
* design aspects of crypto API
* develper specific hints
* references to the API function description
* source code examples
CC: Marek Vasut <marex@denx.de>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Merge DES Cipher Block Chaining mode (CBC) and Triple DES Cipher Block
Chaining mode (CBC) algorithms from ablkcipher to givencrypt.
Signed-off-by: Catalin Vasile <catalin.vasile@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Zeroize the buffer holding the IV used for the completed
cipher operation before the buffer is released by the
skcipher AF_ALG interface handler.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Zeroize the buffer holding the message digest calculated for the
consumer before the buffer is released by the hash AF_ALG interface
handler.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The system PM functions were unused when CONFIG_PM is unset. Let's move
them inside CONFIG_PM_SLEEP to silence the compiler warning.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The system PM functions were unused when CONFIG_PM is unset. Let's move
them inside CONFIG_PM_SLEEP to silence the compiler warning.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The kernel module drbg.ko is currently not loaded automatically when a
DRBG is requested by a consumer. This is due to missing MODULE_ALIAS
flags for each of the implemented DRBG types.
This patch adds aliases for each of the 22 defined DRBGs.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
- enable bpf syscall for compat
- cpu_suspend fix when checking the idle state type
- defconfig update
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- enable bpf syscall for compat
- cpu_suspend fix when checking the idle state type
- defconfig update
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: defconfig: update defconfig for 3.18
arm64: compat: Enable bpf syscall
arm64: psci: fix cpu_suspend to check idle state type for index
Another quiet week:
- A fix to silence edma probe error on non-supported platforms from Arnd
- A fix to enable the PL clock for Parallella, to make mainline usable with
the SDK.
- A somewhat verbose fix for the PLL clock tree on VF610
- Enabling of SD/MMC on one of the VF610-based boards (for testing)
- A fix for i.MX where CONFIG_SPI used to be implicitly enabled and now needs
to be added to the defconfig instead
- Another maintainer added for bcm2835: Lee Jones
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Merge tag 'armsoc-for-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Another quiet week:
- a fix to silence edma probe error on non-supported platforms from
Arnd
- a fix to enable the PL clock for Parallella, to make mainline
usable with the SDK.
- a somewhat verbose fix for the PLL clock tree on VF610
- enabling of SD/MMC on one of the VF610-based boards (for testing)
- a fix for i.MX where CONFIG_SPI used to be implicitly enabled and
now needs to be added to the defconfig instead
- another maintainer added for bcm2835: Lee Jones"
* tag 'armsoc-for-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: dts: zynq: Enable PL clocks for Parallella
dma: edma: move device registration to platform code
ARM: dts: vf610: add SD node to cosmic dts
MAINTAINERS: update bcm2835 entry
ARM: imx: Fix the removal of CONFIG_SPI option
ARM: imx: clk-vf610: define PLL's clock tree
Pull devicetree bugfix from Grant Likely:
"One buffer overflow bug that shouldn't be left around"
* 'devicetree/merge' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux:
of: Fix overflow bug in string property parsing functions
Pull btrfs fix from Chris Mason:
"It's a one liner for an error cleanup path that leads to crashes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: fix kfree on list_head in btrfs_lookup_csums_range error cleanup
Here are 3 tiny fixes for 3.18-rc4. One fixes up a long-stading race
condition in the driver core for removing directories in
/sys/devices/virtual/ and the other 2 fix up the wording of a new
Kconfig option that was added in 3.18-rc1.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are 3 tiny fixes for 3.18-rc4.
One fixes up a long-stading race condition in the driver core for
removing directories in /sys/devices/virtual/ and the other 2 fix up
the wording of a new Kconfig option that was added in 3.18-rc1"
* tag 'driver-core-3.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
tiny: rename ENABLE_DEV_COREDUMP to ALLOW_DEV_COREDUMP
tiny: reverse logic for DISABLE_DEV_COREDUMP
sysfs: driver core: Fix glue dir race condition by gdp_mutex
Here are some staging/iio fixes for 3.18-rc4.
Nothing major, just a few bugfixes of things that have been reported.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-3.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are some staging/iio fixes for 3.18-rc4.
Nothing major, just a few bugfixes of things that have been reported"
* tag 'staging-3.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging:iio:ade7758: Remove "raw" from channel name
staging:iio:ade7758: Fix check if channels are enabled in prenable
staging:iio:ade7758: Fix NULL pointer deref when enabling buffer
iio: as3935: allocate correct iio_device size
io: accel: kxcjk-1013: Fix iio_event_spec direction
iio: tsl4531: Fix compiler error when CONFIG_PM_OPS is not defined
iio: adc: mxs-lradc: Disable the clock on probe failure
iio: st_sensors: Fix buffer copy
staging:iio:ad5933: Drop "raw" from channel names
staging:iio:ad5933: Fix NULL pointer deref when enabling buffer
Here are some tiny serial/tty fixes for 3.18-rc4 that resolve some
reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some tiny serial/tty fixes for 3.18-rc4 that resolve some
reported issues"
* tag 'tty-3.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty: Fix pty master poll() after slave closes v2
serial: of-serial: fix uninitialized kmalloc variable
tty/vt: don't set font mappings on vc not supporting this
tty: serial: 8250_mtk: Fix quot calculation
tty: Prevent "read/write wait queue active!" log flooding
tty: Fix high cpu load if tty is unreleaseable
serial: Fix divide-by-zero fault in uart_get_divisor()
Here are some USB fixes for 3.18-rc4.
Just a bunch of little fixes resolving reported issues and new device ids for
existing drivers. Full details are in the shortlog.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some USB fixes for 3.18-rc4.
Just a bunch of little fixes resolving reported issues and new device
ids for existing drivers. Full details are in the shortlog"
* tag 'usb-3.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (26 commits)
USB: Update default usb-storage delay_use value in kernel-parameters.txt
USB: cdc-acm: add quirk for control-line state requests
phy: omap-usb2: Enable runtime PM of omap-usb2 phy properly
USB: storage: Fix timeout in usb_stor_euscsi_init() and usb_stor_huawei_e220_init()
USB: cdc-acm: only raise DTR on transitions from B0
Revert "storage: Replace magic number with define in usb_stor_euscsi_init()"
usb: core: notify disconnection when core detects disconnect
usb: core: need to call usb_phy_notify_connect after device setup
uas: Add US_FL_NO_ATA_1X quirk for 2 more Seagate models
xhci: no switching back on non-ULT Haswell
USB: quirks: enable device-qualifier quirk for yet another Elan touchscreen
USB: quirks: enable device-qualifier quirk for another Elan touchscreen
MAINTAINERS: Remove duplicate entry for usbip driver
usb: storage: fix build warnings !CONFIG_PM
usb: Remove references to non-existent PLAT_S5P symbol
uas: Add NO_ATA_1X for VIA VL711 devices
xhci: Disable streams on Asmedia 1042 xhci controllers
USB: HWA: fix a warning message
uas: Add US_FL_NO_ATA_1X quirk for 1 more Seagate model
usb-storage: handle a skipped data phase
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