From: Tejun Heo Date: Wed, 11 Feb 2009 07:31:00 +0000 (+0900) Subject: x86: fix x86_32 stack protector bugs X-Git-Tag: v2.6.30-rc1~2^2~50^2~29 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5c79d2a517a9905599d192db8ce77ab5f1a2faca;p=pandora-kernel.git x86: fix x86_32 stack protector bugs Impact: fix x86_32 stack protector Brian Gerst found out that %gs was being initialized to stack_canary instead of stack_canary - 20, which basically gave the same canary value for all threads. Fixing this also exposed the following bugs. * cpu_idle() didn't call boot_init_stack_canary() * stack canary switching in switch_to() was being done too late making the initial run of a new thread use the old stack canary value. Fix all of them and while at it update comment in cpu_idle() about calling boot_init_stack_canary(). Reported-by: Brian Gerst Signed-off-by: Tejun Heo Signed-off-by: Ingo Molnar --- Reading git-diff-tree failed