From: Zachary Amsden <zach@vmware.com>
Date: Fri, 23 Jun 2006 09:04:30 +0000 (-0700)
Subject: [PATCH] i386: don't try kprobes for v8086 mode
X-Git-Tag: firefly_0821_release~35458^2~112
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6444541671bd821b950dbaafee70d65188198aa6;p=firefly-linux-kernel-4.4.55.git

[PATCH] i386: don't try kprobes for v8086 mode

Never allow int3 traps from V8086 mode to enter the kprobes handler.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/i386/kernel/kprobes.c b/arch/i386/kernel/kprobes.c
index 38806f427849..395a9a6dff88 100644
--- a/arch/i386/kernel/kprobes.c
+++ b/arch/i386/kernel/kprobes.c
@@ -607,7 +607,7 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
 	struct die_args *args = (struct die_args *)data;
 	int ret = NOTIFY_DONE;
 
-	if (args->regs && user_mode(args->regs))
+	if (args->regs && user_mode_vm(args->regs))
 		return ret;
 
 	switch (val) {