Messages in this thread Patch in this message | | | From | Frederic Weisbecker <> | Subject | [PATCH 06/24] kprobes: Prohibit to probe native_get_debugreg | Date | Tue, 22 Sep 2009 21:38:04 +0200 |
| |
From: Masami Hiramatsu <mhiramat@redhat.com>
Since do_debug() calls get_debugreg(), native_get_debugreg() will be called from singlestepping. This can cause an int3 infinite loop.
We can't put it in the .text.kprobes section because it is inlined, then we blacklist its name.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20090827172332.8246.34194.stgit@localhost.localdomain> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> --- 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 */ }; -- 1.6.2.3
| |