linux-kernel - [PATCH v4 04/18] powerpc/pseries: add of_node_put() in dlpar_detach

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1539657458-24401-5-git-send-email-frowand.list@gmail.com>
Date:   Mon, 15 Oct 2018 19:37:24 -0700
From:   frowand.list@...il.com
To:     Rob Herring <robh+dt@...nel.org>,
        Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Alan Tull <atull@...nel.org>, Moritz Fischer <mdf@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        devicetree@...r.kernel.org, linux-fpga@...r.kernel.org
Subject: [PATCH v4 04/18] powerpc/pseries: add of_node_put() in dlpar_detach_node()

From: Frank Rowand <frank.rowand@...y.com>

"of: overlay: add missing of_node_get() in __of_attach_node_sysfs"
added a missing of_node_get() to __of_attach_node_sysfs().  This
results in a refcount imbalance for nodes attached with
dlpar_attach_node().  The calling sequence from dlpar_attach_node()
to __of_attach_node_sysfs() is:

   dlpar_attach_node()
      of_attach_node()
         __of_attach_node_sysfs()

Signed-off-by: Frank Rowand <frank.rowand@...y.com>
---

***** UNTESTED.  I need people with the affected PowerPC systems
*****            (systems that dynamically allocate and deallocate
*****            devicetree nodes) to test this patch.

 arch/powerpc/platforms/pseries/dlpar.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index a0b20c03f078..e3010b14aea5 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -272,6 +272,8 @@ int dlpar_detach_node(struct device_node *dn)
 	if (rc)
 		return rc;
 
+	of_node_put(dn);
+
 	return 0;
 }
 
-- 
Frank Rowand <frank.rowand@...y.com>