From: Xiaobing Luo <luoxiaobing0926@gmail.com>
To: tiny.windzz@gmail.com, rafael@kernel.org,
viresh.kumar@linaro.org, wens@csie.org, jernej.skrabec@gmail.com,
samuel@sholland.org
Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
Xiaobing Luo <luoxiaobing0926@gmail.com>
Subject: [PATCH] fix memory leak in sun50i_cpufreq_nvmem_probe
Date: Thu, 14 Apr 2022 04:59:17 +0000 [thread overview]
Message-ID: <20220414045917.3223700-1-luoxiaobing0926@gmail.com> (raw)
if sun50i_cpufreq_get_efuse failed, then opp_tables leak.
unreferenced object 0xffff000010742a00 (size 128):
comm "swapper/0", pid 1, jiffies 4294902015 (age 1187.652s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000b4dfebaa>] __kmalloc+0x338/0x474
[<00000000d6e716db>] sun50i_cpufreq_nvmem_probe+0xc4/0x36c
[<000000007d6082a0>] platform_probe+0x98/0x11c
[<00000000c990f549>] really_probe+0x234/0x5a0
[<000000002d9fecc6>] __driver_probe_device+0x194/0x224
[<00000000cf0b94fa>] driver_probe_device+0x64/0x13c
[<00000000f238e4cf>] __device_attach_driver+0xf8/0x180
[<000000006720e418>] bus_for_each_drv+0xf8/0x160
[<00000000df4f14f6>] __device_attach+0x174/0x29c
[<00000000782002fb>] device_initial_probe+0x20/0x30
[<00000000c2681b06>] bus_probe_device+0xfc/0x110
[<00000000964cf3bd>] device_add+0x5f0/0xcd0
[<000000004b9264e3>] platform_device_add+0x198/0x390
[<00000000fa82a9d0>] platform_device_register_full+0x178/0x210
[<000000009a5daf13>] sun50i_cpufreq_init+0xf8/0x168
[<000000000377cc7c>] do_one_initcall+0xe4/0x570
Signed-off-by: Xiaobing Luo <luoxiaobing0926@gmail.com>
---
drivers/cpufreq/sun50i-cpufreq-nvmem.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
index 2deed8d8773f..75e1bf3a08f7 100644
--- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
+++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
@@ -98,8 +98,10 @@ static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
return -ENOMEM;
ret = sun50i_cpufreq_get_efuse(&speed);
- if (ret)
+ if (ret) {
+ kfree(opp_tables);
return ret;
+ }
snprintf(name, MAX_NAME_LEN, "speed%d", speed);
--
2.25.1
next reply other threads:[~2022-04-14 5:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-14 4:59 Xiaobing Luo [this message]
2022-04-15 18:25 ` [PATCH] fix memory leak in sun50i_cpufreq_nvmem_probe Jernej Škrabec
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