From: Catalin Marinas <catalin.marinas@arm.com>
Date: Wed, 28 Oct 2009 13:33:10 +0000 (+0000)
Subject: kmemleak: Scan the _ftrace_events section in modules
X-Git-Tag: v2.6.33-rc1~8^2~4
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=a6f5aa1ea05686ad6e84593a00a04161e6dfb3a3;p=linux.git

kmemleak: Scan the _ftrace_events section in modules

This section contains pointers to allocated objects and not scanning it
leads to false positives.

Reported-by: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

diff --git a/kernel/module.c b/kernel/module.c
index 1eb952097077..dd29ba43c34f 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2380,6 +2380,12 @@ static noinline struct module *load_module(void __user *umod,
 					 "_ftrace_events",
 					 sizeof(*mod->trace_events),
 					 &mod->num_trace_events);
+	/*
+	 * This section contains pointers to allocated objects in the trace
+	 * code and not scanning it leads to false positives.
+	 */
+	kmemleak_scan_area(mod->trace_events, sizeof(*mod->trace_events) *
+			   mod->num_trace_events, GFP_KERNEL);
 #endif
 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 	/* sechdrs[0].sh_size is always zero */