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authorSuresh Siddha <suresh.b.siddha@intel.com>2008-03-03 16:01:08 -0500
committerIngo Molnar <mingo@elte.hu>2008-03-04 11:10:12 -0500
commit18a8622101154277df97e24097ed17aace84fa3a (patch)
tree3e0581e849c67539b9695b88fc08a68b811cd9e5 /drivers
parent976dde010e513a9c7c3117a32b7b015f84b37430 (diff)
x86, i387: fix ptrace leakage using init_fpu()
This bug got introduced by the recent i387 merge: commit 4421011120b2304e5c248ae4165a2704588aedf1 Author: Roland McGrath <roland@redhat.com> Date: Wed Jan 30 13:31:50 2008 +0100 x86: x86 i387 user_regset Current usage of unlazy_fpu() in ptrace specific routines is wrong. unlazy_fpu() will not init fpu if the task never used math. So the ptrace calls can expose the parent tasks FPU data in some cases. Replace it with the init_fpu() which will init the math state, if the task never used math before. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Thomas Gleixner <tglx@linutronix.de>
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