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authorKees Cook <keescook@chromium.org>2019-01-20 14:33:34 -0800
committerKees Cook <keescook@chromium.org>2019-01-20 14:44:52 -0800
commit5631e8576a3caf606cdc375f97425a67983b420c (patch)
tree4c5723127cca25af506b0edc6c8d75482d3e846f
parent6a4c9ab13feeacd3072175d7d1f1fcfabbb9fc90 (diff)
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>
-rw-r--r--fs/pstore/ram.c9
1 files changed, 3 insertions, 6 deletions
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)