[PATCH] kmemleak: Scan the jump label module section

[Catalin Marinas]

Objects allocated in jump_label_add_module() are currently reported as
leaks, though the pointers are stored in the module jump label section.
This patch informs kmemleak that this section needs to be scanned.

Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Reported-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 kernel/module.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/kernel/module.c b/kernel/module.c
index b049939..ff83711 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2764,6 +2764,13 @@ static void find_module_sections(struct module *mod, struct load_info *info)
 	mod->jump_entries = section_objs(info, "__jump_table",
 					sizeof(*mod->jump_entries),
 					&mod->num_jump_entries);
+	/*
+	 * This section contains pointers to objects allocated in
+	 * jump_label_add_module() and not scanning it leads to false
+	 * positives.
+	 */
+	kmemleak_scan_area(mod->jump_entries, sizeof(*mod->jump_entries) *
+			   mod->num_jump_entries, GFP_KERNEL);
 #endif
 #ifdef CONFIG_EVENT_TRACING
 	mod->trace_events = section_objs(info, "_ftrace_events",
--
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