From: Sergey Vlasov <vsu@altlinux.ru>
Date: Fri, 24 Mar 2006 11:18:38 +0000 (-0800)
Subject: [PATCH] Fix module refcount leak in __set_personality()
X-Git-Tag: firefly_0821_release~37295
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6a4d11c2abc57ed7ca42041e5f68ae4f7f640a81;p=firefly-linux-kernel-4.4.55.git

[PATCH] Fix module refcount leak in __set_personality()

If the change of personality does not lead to change of exec domain,
__set_personality() returned without releasing the module reference
acquired by lookup_exec_domain().

Signed-off-by: Sergey Vlasov <vsu@altlinux.ru>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/kernel/exec_domain.c b/kernel/exec_domain.c
index 867d6dbeb574..c01cead2cfd6 100644
--- a/kernel/exec_domain.c
+++ b/kernel/exec_domain.c
@@ -140,6 +140,7 @@ __set_personality(u_long personality)
 	ep = lookup_exec_domain(personality);
 	if (ep == current_thread_info()->exec_domain) {
 		current->personality = personality;
+		module_put(ep->module);
 		return 0;
 	}