From: Yang Yingliang <yangyingliang@huawei.com> stable inclusion from stable-v5.10.121 commit 560dcbe1c7a78f597f2167371ebdbe2bca3d0735 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6CQ Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit a2b331ac11e1cac56f5b7d367e9f3c5796deaaed ] It will cause null-ptr-deref if platform_get_resource_byname() returns NULL, we need check the return value. Fixes: 858e26a515c2 ("spi: spi-fsl-qspi: Reduce devm_ioremap size to 4 times AHB buffer size") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20220505093954.1285615-1-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Acked-by: Xie XiuQi <xiexiuqi@huawei.com> --- drivers/spi/spi-fsl-qspi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/spi/spi-fsl-qspi.c b/drivers/spi/spi-fsl-qspi.c index 9851551ebbe0..46ae46a944c5 100644 --- a/drivers/spi/spi-fsl-qspi.c +++ b/drivers/spi/spi-fsl-qspi.c @@ -876,6 +876,10 @@ static int fsl_qspi_probe(struct platform_device *pdev) res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "QuadSPI-memory"); + if (!res) { + ret = -EINVAL; + goto err_put_ctrl; + } q->memmap_phy = res->start; /* Since there are 4 cs, map size required is 4 times ahb_buf_size */ q->ahb_addr = devm_ioremap(dev, q->memmap_phy, -- 2.20.1