x86/jump-label: Add safety checks to jump label conversions

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As with all modifying of kernel text, we need to be very paranoid.

When converting the jump label locations to and from nops to jumps
a check has been added to make sure what we are replacing is what we
expect, otherwise we bug.

Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jason Baron <jbaron@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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Steven Rostedt 2012-01-26 18:38:07 -05:00 • committed by Steven Rostedt

parent 11570da1c5

commit 9c85f3bdf4

1 changed files with 28 additions and 4 deletions

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arch/x86/kernel/jump_label.c

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