From: Aaron Tomlin <atomlin@redhat.com>
To: peterz@infradead.org
Cc: mingo@redhat.com, dzickus@redhat.com, bmr@redhat.com,
jcastillo@redhat.com, atomlin@redhat.com, oleg@redhat.com,
pzijlstr@redhat.com, riel@redhat.com,
linux-kernel@vger.kernel.org, tglx@linutronix.de, x86@kernel.org,
rostedt@goodmis.org, hannes@cmpxchg.org,
aneesh.kumar@linux.vnet.ibm.com, akpm@linux-foundation.org,
linuxppc-dev@lists.ozlabs.org, minchan@kernel.org
Subject: [PATCH 0/2] sched: Always check the integrity of the canary
Date: Thu, 4 Sep 2014 15:50:22 +0100 [thread overview]
Message-ID: <1409842224-11847-1-git-send-email-atomlin@redhat.com> (raw)
Currently in the event of a stack overrun a call to schedule()
does not check for this type of corruption. This corruption is
often silent and can go unnoticed. However once the corrupted
region is examined at a later stage, the outcome is undefined
and often results in a sporadic page fault which cannot be
handled.
The first patch provides a helper to determine the integrity
of the canary. While the second patch checks for a stack
overrun and takes appropriate action since the damage is
already done, there is no point in continuing.
Aaron Tomlin (2):
sched: Add helper for task stack page overrun checking
sched: BUG when stack end location is over written
arch/powerpc/mm/fault.c | 6 ++----
arch/x86/mm/fault.c | 5 +----
include/linux/sched.h | 3 +++
kernel/sched/core.c | 3 +++
kernel/trace/trace_stack.c | 5 ++---
5 files changed, 11 insertions(+), 11 deletions(-)
--
1.9.3
next reply other threads:[~2014-09-04 14:52 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-04 14:50 Aaron Tomlin [this message]
2014-09-04 14:50 ` [PATCH 1/2] sched: Add helper for task stack page overrun checking Aaron Tomlin
2014-09-04 15:02 ` Oleg Nesterov
2014-09-04 15:52 ` Aaron Tomlin
2014-09-04 15:30 ` Peter Zijlstra
2014-09-04 14:50 ` [PATCH 2/2] sched: BUG when stack end location is over written Aaron Tomlin
2014-09-04 15:32 ` Peter Zijlstra
2014-09-04 16:11 ` Aaron Tomlin
2014-09-08 19:23 ` [PATCH v2 0/3] sched: Always check the integrity of the canary Aaron Tomlin
2014-09-08 19:23 ` [PATCH 1/3] init/main.c: Give init_task a canary Aaron Tomlin
2014-09-08 19:23 ` [PATCH 2/3] sched: Add helper for task stack page overrun checking Aaron Tomlin
2014-09-08 19:23 ` [PATCH 3/3] sched: BUG when stack end location is over written Aaron Tomlin
2014-09-09 9:42 ` [PATCH v2 0/3] sched: Always check the integrity of the canary Aaron Tomlin
2014-09-09 9:42 ` [PATCH v2 1/3] init/main.c: Give init_task a canary Aaron Tomlin
2014-09-10 7:26 ` Chuck Ebbert
2014-09-10 13:29 ` Aaron Tomlin
2014-09-11 12:23 ` Chuck Ebbert
2014-09-11 14:47 ` Aaron Tomlin
2014-09-09 9:42 ` [PATCH v2 2/3] sched: Add helper for task stack page overrun checking Aaron Tomlin
2014-09-09 9:42 ` [PATCH v2 3/3] sched: BUG when stack end location is over written Aaron Tomlin
2014-09-11 15:41 ` [PATCH v3 0/3] sched: Always check the integrity of the canary Aaron Tomlin
2014-09-11 15:41 ` [PATCH v3 1/3] init/main.c: Give init_task a canary Aaron Tomlin
2014-09-12 7:28 ` Michael Ellerman
2014-09-11 15:41 ` [PATCH v3 2/3] sched: Add helper for task stack page overrun checking Aaron Tomlin
2014-09-11 15:41 ` [PATCH v3 3/3] sched: BUG when stack end location is over written Aaron Tomlin
2014-09-12 4:06 ` Michael Ellerman
2014-09-12 9:44 ` Aaron Tomlin
2014-09-12 10:58 ` Mike Galbraith
2014-09-15 2:39 ` Michael Ellerman
2014-09-12 6:04 ` Michael Ellerman
2014-09-12 9:50 ` Aaron Tomlin
2014-09-11 15:53 ` [PATCH v3 0/3] sched: Always check the integrity of the canary Peter Zijlstra
2014-09-11 15:59 ` Aaron Tomlin
2014-09-11 16:02 ` David Laight
2014-09-11 17:26 ` Chuck Ebbert
2014-09-12 8:43 ` David Laight
2014-09-11 17:44 ` Aaron Tomlin
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