[PATCH 3.18 086/178] module: Call module notifier on failure after complete_formation()

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From: Steven Rostedt <rostedt@xxxxxxxxxxx>

[ Upstream commit 37815bf866ab6722a47550f8d25ad3f1a16a680c ]

The module notifier call chain for MODULE_STATE_COMING was moved up before
the parsing of args, into the complete_formation() call. But if the module failed
to load after that, the notifier call chain for MODULE_STATE_GOING was
never called and that prevented the users of those call chains from
cleaning up anything that was allocated.

Link: http://lkml.kernel.org/r/554C52B9.9060700@xxxxxxxxx

Reported-by: Pontus Fuchs <pontus.fuchs@xxxxxxxxx>
Fixes: 4982223e51e8 "module: set nx before marking module MODULE_STATE_COMING"
Cc: stable@xxxxxxxxxxxxxxx # 3.16+
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
 kernel/module.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/module.c b/kernel/module.c
index 88cec1d..c353707 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -3307,6 +3307,9 @@ static int load_module(struct load_info *info, const char __user *uargs,
 	module_bug_cleanup(mod);
 	mutex_unlock(&module_mutex);
 
+	blocking_notifier_call_chain(&module_notify_list,
+				     MODULE_STATE_GOING, mod);
+
 	/* we can't deallocate the module until we clear memory protection */
 	unset_module_init_ro_nx(mod);
 	unset_module_core_ro_nx(mod);
-- 
2.1.0

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