linux/drivers/crypto
Arnd Bergmann cca9bab1b7 tcp: use monotonic timestamps for PAWS
Using get_seconds() for timestamps is deprecated since it can lead
to overflows on 32-bit systems. While the interface generally doesn't
overflow until year 2106, the specific implementation of the TCP PAWS
algorithm breaks in 2038 when the intermediate signed 32-bit timestamps
overflow.

A related problem is that the local timestamps in CLOCK_REALTIME form
lead to unexpected behavior when settimeofday is called to set the system
clock backwards or forwards by more than 24 days.

While the first problem could be solved by using an overflow-safe method
of comparing the timestamps, a nicer solution is to use a monotonic
clocksource with ktime_get_seconds() that simply doesn't overflow (at
least not until 136 years after boot) and that doesn't change during
settimeofday().

To make 32-bit and 64-bit architectures behave the same way here, and
also save a few bytes in the tcp_options_received structure, I'm changing
the type to a 32-bit integer, which is now safe on all architectures.

Finally, the ts_recent_stamp field also (confusingly) gets used to store
a jiffies value in tcp_synq_overflow()/tcp_synq_no_recent_overflow().
This is currently safe, but changing the type to 32-bit requires
some small changes there to keep it working.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-12 14:50:40 -07:00
..
amcc treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
axis crypto: axis - remove unnecessary platform_get_resource() error check 2018-01-26 01:10:29 +11:00
bcm crypto: brcm - explicitly cast cipher to hash type 2018-03-31 01:33:14 +08:00
caam crypto: caam/qi - fix warning in init_cgr() 2018-05-31 00:13:47 +08:00
cavium treewide: kzalloc_node() -> kcalloc_node() 2018-06-12 16:19:22 -07:00
ccp crypto: ccp - Add GET_ID SEV command 2018-05-31 00:13:56 +08:00
ccree crypto: ccree - silence debug prints 2018-05-31 00:13:50 +08:00
chelsio tcp: use monotonic timestamps for PAWS 2018-07-12 14:50:40 -07:00
inside-secure treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
marvell treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
mediatek crypto: mediatek - move to generic async completion 2017-11-03 22:11:23 +08:00
nx crypto: nx - fix spelling mistake: "seqeunce" -> "sequence" 2018-05-19 00:13:55 +08:00
qat treewide: kzalloc_node() -> kcalloc_node() 2018-06-12 16:19:22 -07:00
qce Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2017-11-14 10:52:09 -08:00
rockchip License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stm32 treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
sunxi-ss crypto: sunxi-ss - Add MODULE_ALIAS to sun4i-ss 2018-02-22 22:16:15 +08:00
ux500 crypto: ux500 - Delete two unnecessary variable initialisations in ux500_cryp_probe() 2018-02-22 22:16:34 +08:00
virtio treewide: kzalloc_node() -> kcalloc_node() 2018-06-12 16:19:22 -07:00
vmx crypto: clarify licensing of OpenSSL asm code 2018-05-31 00:13:44 +08:00
atmel-aes-regs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atmel-aes.c crypto: atmel-aes - fix the keys zeroing on errors 2018-03-03 00:03:40 +08:00
atmel-authenc.h crypto: atmel-authenc - add support to authenc(hmac(shaX), Y(aes)) modes 2017-02-03 18:16:14 +08:00
atmel-ecc.c crypto: atmel-ecc - fix signed integer to u8 assignment 2017-08-03 13:47:23 +08:00
atmel-ecc.h crypto: atmel-ecc - introduce Microchip / Atmel ECC driver 2017-07-18 17:50:58 +08:00
atmel-sha-regs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atmel-sha.c crypto: atmel - Delete error messages for a failed memory allocation in six functions 2018-02-22 22:17:00 +08:00
atmel-tdes-regs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atmel-tdes.c crypto: atmel - Delete error messages for a failed memory allocation in six functions 2018-02-22 22:17:00 +08:00
exynos-rng.c crypto: drivers - simplify getting .drvdata 2018-04-28 16:09:35 +08:00
geode-aes.c crypto: geode-aes - fixed coding style warnings and error 2017-07-18 18:15:57 +08:00
geode-aes.h
hifn_795x.c crypto: hifn_795x - Fix a memory leak in the error handling path of 'hifn_probe()' 2017-11-29 17:33:30 +11:00
img-hash.c crypto: img-hash - remove unnecessary static in img_hash_remove() 2017-08-03 13:47:18 +08:00
ixp4xx_crypto.c crypto: ixp4xx - don't leak pointers to authenc keys 2018-03-31 01:33:12 +08:00
Kconfig crypto: inside-secure - authenc(hmac(sha256), cbc(aes)) support 2018-05-27 00:11:59 +08:00
Makefile crypto: bfin_crc - remove blackfin CRC driver 2018-03-23 23:48:37 +08:00
mxc-scc.c crypto: mxc-scc - fix error code in mxc_scc_probe() 2017-07-18 17:50:54 +08:00
mxs-dcp.c crypto: mxs-dcp - Add empty hash export and import 2018-02-15 23:23:44 +08:00
n2_asm.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
n2_core.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
n2_core.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
omap-aes-gcm.c crypto: omap-aes - pr_err() strings should end with newlines 2017-10-12 22:54:51 +08:00
omap-aes.c crypto: omap-aes - make queue length configurable 2018-03-09 22:45:39 +08:00
omap-aes.h crypto: omap - convert to new crypto engine API 2018-02-15 23:26:51 +08:00
omap-crypto.c crypto: omap-crypto - Verify page zone scatterlists before starting DMA 2018-03-09 22:45:36 +08:00
omap-crypto.h crypto: omap - add base support library for common routines 2017-06-10 12:04:15 +08:00
omap-des.c crypto: omap - convert to new crypto engine API 2018-02-15 23:26:51 +08:00
omap-sham.c crypto: omap-sham - fix memleak 2018-04-28 16:09:35 +08:00
padlock-aes.c x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping 2018-02-15 01:15:52 +01:00
padlock-sha.c crypto: padlock-sha - constify x86_cpu_id 2017-09-22 17:43:20 +08:00
picoxcell_crypto_regs.h
picoxcell_crypto.c crypto: drivers - simplify getting .drvdata 2018-04-28 16:09:35 +08:00
s5p-sss.c crypto: s5p-sss - Constify pointed data (arguments and local variables) 2018-03-09 22:45:47 +08:00
sahara.c crypto: sahara - Improve a size determination in sahara_probe() 2018-02-22 22:16:38 +08:00
talitos.c treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
talitos.h crypto: talitos - chain in buffered data for ahash on SEC1 2017-10-12 22:55:38 +08:00