Messages in this thread Patch in this message | | | From | Masami Hiramatsu <> | Subject | [PATCH -tip tracing/kprobes 6/6] kprobes: Prohibit to probe native_get_debugreg | Date | Thu, 27 Aug 2009 13:23:32 -0400 |
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Since do_debug() calls get_debugreg(), native_get_debugreg() will be called from singlestepping. This can cause an int3 infinit loop.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> ---
kernel/kprobes.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index f72e96c..3267d90 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -90,6 +90,7 @@ static spinlock_t *kretprobe_table_lock_ptr(unsigned long hash) */ static struct kprobe_blackpoint kprobe_blacklist[] = { {"preempt_schedule",}, + {"native_get_debugreg",}, {NULL} /* Terminator */ };
-- Masami Hiramatsu
Software Engineer Hitachi Computer Products (America), Inc. Software Solutions Division
e-mail: mhiramat@redhat.com
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