The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 5631e8576a3caf606cdc375f97425a67983b420c Mon Sep 17 00:00:00 2001
From: Kees Cook keescook@chromium.org Date: Sun, 20 Jan 2019 14:33:34 -0800 Subject: [PATCH] pstore/ram: Avoid allocation and leak of platform data
Yue Hu noticed that when parsing device tree the allocated platform data was never freed. Since it's not used beyond the function scope, this switches to using a stack variable instead.
Reported-by: Yue Hu huyue2@yulong.com Fixes: 35da60941e44 ("pstore/ram: add Device Tree bindings") Cc: stable@vger.kernel.org Signed-off-by: Kees Cook keescook@chromium.org
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 076e26fdc0c0..898c8321b343 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -710,18 +710,15 @@ static int ramoops_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct ramoops_platform_data *pdata = dev->platform_data; + struct ramoops_platform_data pdata_local; struct ramoops_context *cxt = &oops_cxt; size_t dump_mem_sz; phys_addr_t paddr; int err = -EINVAL;
if (dev_of_node(dev) && !pdata) { - pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) { - pr_err("cannot allocate platform data buffer\n"); - err = -ENOMEM; - goto fail_out; - } + pdata = &pdata_local; + memset(pdata, 0, sizeof(*pdata));
err = ramoops_parse_dt(pdev, pdata); if (err < 0)