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| author |   Zhang Changzhong <zhangchangzhong@huawei.com> | 2020-12-04 16:31:57 +0800 |
|---|---|---|
| committer |   Krzysztof Kozlowski <krzk@kernel.org> | 2020-12-05 14:57:52 +0100 |
| commit | 4bfa07300b9334b487ed4f3d4901c35ebb31b7ca (patch) | |
| tree | 91f0497fd06df7d1113d370844c31f6294c01933 /drivers/memory | |
| parent | memory: ti-emif-sram: only build for ARMv7 (diff) | |
| download | linux-dev-4bfa07300b9334b487ed4f3d4901c35ebb31b7ca.tar.xz linux-dev-4bfa07300b9334b487ed4f3d4901c35ebb31b7ca.zip | |
memory: jz4780_nemc: Fix potential NULL dereference in jz4780_nemc_probe()
platform_get_resource() may fail and return NULL, so we should
better check it's return value to avoid a NULL pointer dereference
a bit later in the code.
This is detected by Coccinelle semantic patch.
Fixes: 911a88829725 ("memory: jz4780-nemc: driver for the NEMC on JZ4780 SoCs")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/1607070717-32880-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Diffstat (limited to 'drivers/memory')
| -rw-r--r-- | drivers/memory/jz4780-nemc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/memory/jz4780-nemc.c b/drivers/memory/jz4780-nemc.c index 608ae925e641..555f7ac3b7dd 100644 --- a/drivers/memory/jz4780-nemc.c +++ b/drivers/memory/jz4780-nemc.c @@ -291,6 +291,8 @@ static int jz4780_nemc_probe(struct platform_device *pdev) nemc->dev = dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; /* * The driver currently only uses the registers up to offset |