From: Pan Bian bianpan2016@163.com

mainline inclusion from mainline-v5.13-rc1 commit ac6ad7c2a862d682bb584a4bc904d89fa7721af8 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I94VOR CVE: CVE-2021-47054

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Put child node before return to fix potential reference count leak. Generally, the reference count of child is incremented and decremented automatically in the macro for_each_available_child_of_node() and should be decremented manually if the loop is broken in loop body.

Reviewed-by: Linus Walleij linus.walleij@linaro.org Fixes: 335a12754808 ("bus: qcom: add EBI2 driver") Signed-off-by: Pan Bian bianpan2016@163.com Link: https://lore.kernel.org/r/20210121114907.109267-1-bianpan2016@163.com Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org Signed-off-by: Zhang Xiaoxu zhangxiaoxu5@huawei.com --- drivers/bus/qcom-ebi2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/qcom-ebi2.c b/drivers/bus/qcom-ebi2.c index a6444244c411..bfb67aa00bec 100644 --- a/drivers/bus/qcom-ebi2.c +++ b/drivers/bus/qcom-ebi2.c @@ -357,8 +357,10 @@ static int qcom_ebi2_probe(struct platform_device *pdev)

/* Figure out the chipselect */ ret = of_property_read_u32(child, "reg", &csindex); - if (ret) + if (ret) { + of_node_put(child); return ret; + }

if (csindex > 5) { dev_err(dev,