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Subject[PATCH v11 7/8] arm64: Free DTB buffer if fdt_open_into() fails
Date
create_dtb() function allocates memory for the device tree blob (DTB)
and calls fdt_open_into(). If this call fails the memory allocated
for the DTB is not freed before returning from create_dtb() thereby
leaking memory.

Call vfree() to free the memory allocated for the DTB if fdt_open_into()
fails.

Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
---
arch/arm64/kernel/machine_kexec_file.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c
index 7de9c47dee7c..3e045cd62451 100644
--- a/arch/arm64/kernel/machine_kexec_file.c
+++ b/arch/arm64/kernel/machine_kexec_file.c
@@ -65,8 +65,10 @@ static int create_dtb(struct kimage *image,

/* duplicate a device tree blob */
ret = fdt_open_into(initial_boot_params, buf, buf_size);
- if (ret)
+ if (ret) {
+ vfree(buf);
return -EINVAL;
+ }

ret = of_kexec_setup_new_fdt(image, buf, initrd_load_addr,
initrd_len, cmdline);
--
2.29.2
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