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authorMasami Hiramatsu <mhiramat@redhat.com>2009-09-08 12:47:55 -0400
committerFrederic Weisbecker <fweisbec@gmail.com>2009-09-11 03:59:35 +0200
commita00e817f42663941ea0aa5f85a9d1c4f8b212839 (patch)
tree40d2f5e86bf58e4250066fa8cb606a8157e9019b /kernel/kprobes.c
parentf12b4f546b4e327d5620a544a2bddab68de66027 (diff)
downloadlinux-2.6.34-ux500-a00e817f42663941ea0aa5f85a9d1c4f8b212839.tar.gz
kprobes/x86-32: Move irq-exit functions to kprobes section
Move irq-exit functions to .kprobes.text section to protect against kprobes recursion. When I ran kprobe stress test on x86-32, I found below symbols cause unrecoverable recursive probing: ret_from_exception ret_from_intr check_userspace restore_all restore_all_notrace restore_nocheck irq_return And also, I found some interrupt/exception entry points that cause similar problems. This patch moves those symbols (including their container functions) to .kprobes.text section to prevent any kprobes probing. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20090908164755.24050.81182.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'kernel/kprobes.c')
-rw-r--r--kernel/kprobes.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 3267d90bc9d..00d01b0f9fe 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -91,6 +91,8 @@ static spinlock_t *kretprobe_table_lock_ptr(unsigned long hash)
static struct kprobe_blackpoint kprobe_blacklist[] = {
{"preempt_schedule",},
{"native_get_debugreg",},
+ {"irq_entries_start",},
+ {"common_interrupt",},
{NULL} /* Terminator */
};