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arm64: kexec_file: fix memory leakage in create_dtb() when fdt_open_into() fails

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commit 656d1d58d8e0958d372db86c24f0b2ea36f50888 upstream.

in function create_dtb(), if fdt_open_into() fails, we need to vfree
buf before return.

Fixes: 52b2a8af74 ("arm64: kexec_file: load initrd and device-tree")
Cc: stable@vger.kernel.org # v5.0
Signed-off-by: qiuguorui1 <qiuguorui1@huawei.com>
Link: https://lore.kernel.org/r/20210218125900.6810-1-qiuguorui1@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
qiuguorui1 2021-02-18 20:59:00 +08:00 committed by Greg Kroah-Hartman
parent e9e98723c5
commit fa1fbfb644
1 changed files with 3 additions and 1 deletions
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4
arch/arm64/kernel/machine_kexec_file.c
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@ -182,8 +182,10 @@ 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 = setup_dtb(image, initrd_load_addr, initrd_len,
cmdline, buf);