[PATCH 2/4] kmemleak: Scan the _ftrace_events section in modules

[Catalin Marinas]

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

Reported-by: Zdenek Kabelac <zdenek.kabelac@xxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
---
 kernel/module.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/kernel/module.c b/kernel/module.c
index 1eb9520..dd29ba4 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 */

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