Gustavo A. R. Silva 3700bfc36c ptp: fix Spectre v1 vulnerability ... commit efa61c8cf2 upstream. pin_index can be indirectly controlled by user-space, hence leading to a potential exploitation of the Spectre variant 1 vulnerability. This issue was detected with the help of Smatch: drivers/ptp/ptp_chardev.c:253 ptp_ioctl() warn: potential spectre issue 'ops->pin_config' [r] (local cap) Fix this by sanitizing pin_index before using it to index ops->pin_config, and before passing it as an argument to function ptp_set_pinfunc(), in which it is used to index info->pin_config. Notice that given that speculation windows are large, the policy is to kill the speculation on the first load and not worry if it can be completed with a dependent load/store [1]. [1] https://marc.info/?l=linux-kernel&m=152449131114778&w=2 Cc: stable@vger.kernel.org Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-11-10 07:41:42 -08:00
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Kconfig	ptp: ptp_pch depends on x86_32	2014-06-17 15:43:48 -07:00
Makefile	supports eg20t ptp clock	2012-03-09 13:55:34 -08:00
ptp_chardev.c	ptp: fix Spectre v1 vulnerability	2018-11-10 07:41:42 -08:00
ptp_clock.c	time: Change posix clocks ops interfaces to use timespec64	2018-03-24 10:58:40 +01:00
ptp_ixp46x.c	ptp: ixp46x: convert to the 64 bit get/set time methods.	2015-03-31 12:01:19 -04:00
ptp_pch.c	ptp: pch: convert to the 64 bit get/set time methods.	2015-03-31 12:01:19 -04:00
ptp_private.h	ptp: expose the programmable pins via sysfs	2014-03-21 14:21:14 -04:00
ptp_sysfs.c	ptp: expose the programmable pins via sysfs	2014-03-21 14:21:14 -04:00