diff options
| author | Thomas Garnier <thgarnie@google.com> | 2016-08-11 14:49:29 -0700 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-08-12 22:50:42 +0200 |
| commit | 62822e2ec4ad091ba31f823f577ef80db52e3c2c (patch) | |
| tree | 5ad5beabd2c6d46e8949f32d1c359b094c12ba94 /drivers/cpufreq | |
| parent | e4630fdd47637168927905983205d7b7c5c08c09 (diff) | |
| download | op-kernel-dev-62822e2ec4ad091ba31f823f577ef80db52e3c2c.zip op-kernel-dev-62822e2ec4ad091ba31f823f577ef80db52e3c2c.tar.gz | |
PM / hibernate: Restore processor state before using per-CPU variables
Restore the processor state before calling any other functions to
ensure per-CPU variables can be used with KASLR memory randomization.
Tracing functions use per-CPU variables (GS based on x86) and one was
called just before restoring the processor state fully. It resulted
in a double fault when both the tracing & the exception handler
functions tried to use a per-CPU variable.
Fixes: bb3632c6101b (PM / sleep: trace events for suspend/resume)
Reported-and-tested-by: Borislav Petkov <bp@suse.de>
Reported-by: Jiri Kosina <jikos@kernel.org>
Tested-by: Rafael J. Wysocki <rafael@kernel.org>
Tested-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Thomas Garnier <thgarnie@google.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
0 files changed, 0 insertions, 0 deletions
