linux/kernel/power
Aaron Lu fd432b9f8c PM / hibernate: Avoid overflow in hibernate_preallocate_memory()
When system has a lot of highmem (e.g. 16GiB using a 32 bits kernel),
the code to calculate how much memory we need to preallocate in
normal zone may cause overflow. As Leon has analysed:

 It looks that during computing 'alloc' variable there is overflow:
 alloc = (3943404 - 1970542) - 1978280 = -5418 (signed)
 And this function goes to err_out.

Fix this by avoiding that overflow.

References: https://bugzilla.kernel.org/show_bug.cgi?id=60817
Reported-and-tested-by: Leon Drugi <eyak@wp.pl>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-11-07 01:58:39 +01:00
..
autosleep.c PM / Sleep: avoid 'autosleep' in shutdown progress 2013-07-15 01:31:37 +02:00
block_io.c block: kill off REQ_UNPLUG 2011-03-10 08:52:27 +01:00
console.c PM: make VT switching to the suspend console optional v3 2013-02-20 01:33:41 +01:00
hibernate.c ACPI and power management fixes for 3.12-rc1 2013-09-12 11:22:45 -07:00
Kconfig PM / Sleep: Detect device suspend/resume lockup and log event 2013-10-18 13:33:08 +02:00
main.c PM / Sleep: Warn about system time after resume with pm_trace 2013-06-27 22:14:46 +02:00
Makefile PM / Sleep: Add user space interface for manipulating wakeup sources, v3 2012-05-01 21:26:05 +02:00
power.h PM / Hibernate: Enable suspend to both for in-kernel hibernation. 2012-07-01 13:31:22 +02:00
poweroff.c power/sysrq: fix inconstistent help message of sysrq key 2013-04-30 17:04:10 -07:00
process.c freezer: set PF_SUSPEND_TASK flag on tasks that call freeze_processes 2013-07-30 14:05:06 +02:00
qos.c PM / QoS: Fix workqueue deadlock when using pm_qos_update_request_timeout() 2013-08-14 00:42:05 +02:00
snapshot.c PM / hibernate: Avoid overflow in hibernate_preallocate_memory() 2013-11-07 01:58:39 +01:00
suspend_test.c driver-core: constify data for class_find_device() 2013-02-06 12:18:56 -08:00
suspend.c PM / Sleep: increase ftrace coverage in suspend/resume 2013-07-26 00:49:07 +02:00
swap.c PM / Hibernate: use rb_entry 2012-11-15 00:37:08 +01:00
user.c PM / Hibernate: Use bool for boolean fields of struct snapshot_data 2013-10-18 22:20:40 +02:00
wakelock.c PM / Sleep: Require CAP_BLOCK_SUSPEND to use wake_lock/wake_unlock 2012-07-19 00:00:58 +02:00