From: Wen Yang <wen.yang99@zte.com.cn>
To: linux-kernel@vger.kernel.org
Cc: wang.yi59@zte.com.cn, Paul Mackerras <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org, Wen Yang <wen.yang99@zte.com.cn>
Subject: [PATCH 1/5] powerpc/sparse: fix possible object reference leak
Date: Fri, 22 Mar 2019 11:05:51 +0800 [thread overview]
Message-ID: <1553223955-7350-1-git-send-email-wen.yang99@zte.com.cn> (raw)
The call to of_find_node_by_path returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.
Detected by coccinelle with the following warnings:
./arch/powerpc/platforms/pseries/pseries_energy.c:101:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 46, but without a corresponding object release within this function.
./arch/powerpc/platforms/pseries/pseries_energy.c:172:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 111, but without a corresponding object release within this function.
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
---
arch/powerpc/platforms/pseries/pseries_energy.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/pseries_energy.c b/arch/powerpc/platforms/pseries/pseries_energy.c
index 6ed2212..e3913e4 100644
--- a/arch/powerpc/platforms/pseries/pseries_energy.c
+++ b/arch/powerpc/platforms/pseries/pseries_energy.c
@@ -69,7 +69,7 @@ static u32 cpu_to_drc_index(int cpu)
of_read_drc_info_cell(&info, &value, &drc);
if (strncmp(drc.drc_type, "CPU", 3))
- goto err;
+ goto err_of_node_put;
if (thread_index < drc.last_drc_index)
break;
@@ -131,7 +131,7 @@ static int drc_index_to_cpu(u32 drc_index)
of_read_drc_info_cell(&info, &value, &drc);
if (strncmp(drc.drc_type, "CPU", 3))
- goto err;
+ goto err_of_node_put;
if (drc_index > drc.last_drc_index) {
cpu += drc.num_sequential_elems;
--
2.9.5
next reply other threads:[~2019-03-22 3:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-22 3:05 Wen Yang [this message]
2019-03-22 3:05 ` [PATCH 2/5] powerpc/83xx: fix possible object reference leak Wen Yang
2022-03-27 7:09 ` Christophe Leroy
2019-03-22 3:05 ` [PATCH 3/5] powerpc/powernv: " Wen Yang
2019-03-22 3:05 ` [PATCH 4/5] powerpc/embedded6xx: " Wen Yang
2019-03-22 3:05 ` [PATCH 5/5] powerpc/8xx: " Wen Yang
2019-03-22 7:09 ` Christophe Leroy
2019-04-05 8:50 ` [1/5] powerpc/sparse: " Markus Elfring
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