Andy Lutomirski 4012e77a90 x86/nmi: Fix NMI uaccess race against CR3 switching ... A NMI can hit in the middle of context switching or in the middle of switch_mm_irqs_off(). In either case, CR3 might not match current->mm, which could cause copy_from_user_nmi() and friends to read the wrong memory. Fix it by adding a new nmi_uaccess_okay() helper and checking it in copy_from_user_nmi() and in __copy_from_user_nmi()'s callers. Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Rik van Riel <riel@surriel.com> Cc: Nadav Amit <nadav.amit@gmail.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Jann Horn <jannh@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/dd956eba16646fd0b15c3c0741269dfd84452dac.1535557289.git.luto@kernel.org		2018-08-31 17:08:22 +02:00
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amd	perf/x86/amd/ibs: Don't access non-started event	2018-07-24 09:51:10 +02:00
intel	Merge branch 'perf/urgent' into perf/core, to pick up fixes	2018-08-02 09:59:20 +02:00
core.c	x86/nmi: Fix NMI uaccess race against CR3 switching	2018-08-31 17:08:22 +02:00
Kconfig	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Makefile	perf/x86/events: Add an AMD-specific Makefile	2017-01-30 12:01:19 +01:00
msr.c	perf/x86/msr: Fix possible Spectre-v1 indexing in the MSR driver	2018-05-05 08:37:29 +02:00
perf_event.h	perf/x86/intel: Introduce PMU flag for Extended PEBS	2018-07-25 11:50:49 +02:00