[PATCH v2 2/4] uprobes: refuse uprobe on trap variants

[Ananth N Mavinakayanahalli]

From: Ananth N Mavinakayanahalli <ananth at in.ibm.com>

Refuse to place a uprobe if a trap variant already exists in the
file copy at the address.

Signed-off-by: Ananth N Mavinakayanahalli <ananth at in.ibm.com>
---
 kernel/events/uprobes.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-3.9-rc3/kernel/events/uprobes.c
===================================================================
--- linux-3.9-rc3.orig/kernel/events/uprobes.c
+++ linux-3.9-rc3/kernel/events/uprobes.c
@@ -573,7 +573,7 @@ static int prepare_uprobe(struct uprobe
 		goto out;
 
 	ret = -ENOTSUPP;
-	if (is_swbp_insn((uprobe_opcode_t *)uprobe->arch.insn))
+	if (is_trap_insn((uprobe_opcode_t *)uprobe->arch.insn))
 		goto out;
 
 	ret = arch_uprobe_analyze_insn(&uprobe->arch, mm, vaddr);