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Message-Id: <20210104192602.10131-6-nramas@linux.microsoft.com>
Date: Mon, 4 Jan 2021 11:26:01 -0800
From: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
To: zohar@...ux.ibm.com, bauerman@...ux.ibm.com, robh@...nel.org,
takahiro.akashi@...aro.org, gregkh@...uxfoundation.org,
will@...nel.org, catalin.marinas@....com, mpe@...erman.id.au
Cc: james.morse@....com, sashal@...nel.org, benh@...nel.crashing.org,
paulus@...ba.org, frowand.list@...il.com,
vincenzo.frascino@....com, mark.rutland@....com,
dmitry.kasatkin@...il.com, jmorris@...ei.org, serge@...lyn.com,
pasha.tatashin@...een.com, allison@...utok.net,
masahiroy@...nel.org, bhsharma@...hat.com, mbrugger@...e.com,
hsinyi@...omium.org, tao.li@...o.com, christophe.leroy@....fr,
prsriva@...ux.microsoft.com, balajib@...ux.microsoft.com,
linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linuxppc-dev@...r.kernel.org
Subject: [PATCH v14 5/6] arm64: Free DTB buffer if fdt_open_into() fails
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.
Co-developed-by: Prakhar Srivastava <prsriva@...ux.microsoft.com>
Signed-off-by: Prakhar Srivastava <prsriva@...ux.microsoft.com>
Signed-off-by: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@...ux.ibm.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 7da22bb7b9d5..2664b63bb118 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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