perf: Fix software event overflow, CVE-2011-2918
authorPeter Zijlstra <a.p.zijlstra@chello.nl>
Fri, 26 Aug 2011 08:59:37 +0000 (09:59 +0100)
committerTim Gardner <tim.gardner@canonical.com>
Fri, 26 Aug 2011 12:20:56 +0000 (06:20 -0600)
commit17428fd2e7940468fe91beaa5ea720185b7c8c8c
tree7e5e8c5193a68e8beb3483de684a6c585ad002cc
parent9293da4fdc38cacfa205854fd48a64d7370da442
perf: Fix software event overflow, CVE-2011-2918

BugLink: http://bugs.launchpad.net/bugs/834121
The below patch is for -stable only, upstream has a much larger patch
that contains the below hunk in commit a8b0ca17b80e92faab46ee7179ba9e99ccb61233

Vince found that under certain circumstances software event overflows
go wrong and deadlock. Avoid trying to delete a timer from the timer
callback.

Reported-by: Vince Weaver <vweaver1@eecs.utk.edu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
CVE-2011-2918
backported from commit 462fee3af72df0de7b60b96c525ffe8baf4db0f0 stable-3.0.y
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
kernel/perf_event.c