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intel_th: msu: Fix possible memory leak in mode_store() 

'mode' is malloced in mode_store() and should be freed before leaving
from the error handling cases, otherwise it will cause memory leak.

Fixes: 615c164da0 ("intel_th: msu: Introduce buffer interface")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/lkml/20190801013825.182543-1-weiyongjun1@huawei.com/
Link: https://lore.kernel.org/r/20191028070651.9770-6-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
alistair/sunxi64-5.4-dsi
Wei Yongjun 2019-10-28 09:06:49 +02:00 committed by Greg Kroah-Hartman
parent 8e3ef7b444
commit 1fa1b6ca0f
1 changed files with 3 additions and 1 deletions
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4
drivers/hwtracing/intel_th/msu.c
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@ -1852,8 +1852,10 @@ mode_store(struct device *dev, struct device_attribute *attr, const char *buf,
return -ENOMEM;
i = match_string(msc_mode, ARRAY_SIZE(msc_mode), mode);
if (i >= 0)
if (i >= 0) {
kfree(mode);
goto found;
}
/* Buffer sinks only work with a usable IRQ */
if (!msc->do_irq) {