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From: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
To: zohar@linux.ibm.com, bauerman@linux.ibm.com, robh@kernel.org,
	takahiro.akashi@linaro.org, gregkh@linuxfoundation.org,
	will@kernel.org, catalin.marinas@arm.com, mpe@ellerman.id.au
Cc: james.morse@arm.com, sashal@kernel.org, benh@kernel.crashing.org,
	paulus@samba.org, frowand.list@gmail.com,
	vincenzo.frascino@arm.com, mark.rutland@arm.com,
	dmitry.kasatkin@gmail.com, jmorris@namei.org, serge@hallyn.com,
	pasha.tatashin@soleen.com, allison@lohutok.net,
	masahiroy@kernel.org, bhsharma@redhat.com, mbrugger@suse.com,
	hsinyi@chromium.org, tao.li@vivo.com, christophe.leroy@c-s.fr,
	prsriva@linux.microsoft.com, balajib@linux.microsoft.com,
	linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org
Subject: [PATCH v11 7/8] arm64: Free DTB buffer if fdt_open_into() fails
Date: Mon, 14 Dec 2020 11:18:53 -0800	[thread overview]
Message-ID: <20201214191854.9050-8-nramas@linux.microsoft.com> (raw)
In-Reply-To: <20201214191854.9050-1-nramas@linux.microsoft.com>

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


WARNING: multiple messages have this Message-ID (diff)
From: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
To: zohar@linux.ibm.com, bauerman@linux.ibm.com, robh@kernel.org,
	takahiro.akashi@linaro.org, gregkh@linuxfoundation.org,
	will@kernel.org, catalin.marinas@arm.com, mpe@ellerman.id.au
Cc: mark.rutland@arm.com, benh@kernel.crashing.org,
	bhsharma@redhat.com, tao.li@vivo.com, paulus@samba.org,
	vincenzo.frascino@arm.com, frowand.list@gmail.com,
	sashal@kernel.org, masahiroy@kernel.org, jmorris@namei.org,
	linux-arm-kernel@lists.infradead.org, serge@hallyn.com,
	devicetree@vger.kernel.org, pasha.tatashin@soleen.com,
	prsriva@linux.microsoft.com, hsinyi@chromium.org,
	allison@lohutok.net, christophe.leroy@c-s.fr, mbrugger@suse.com,
	balajib@linux.microsoft.com, dmitry.kasatkin@gmail.com,
	linux-kernel@vger.kernel.org, james.morse@arm.com,
	linux-integrity@vger.kernel.org
Subject: [PATCH v11 7/8] arm64: Free DTB buffer if fdt_open_into() fails
Date: Mon, 14 Dec 2020 11:18:53 -0800	[thread overview]
Message-ID: <20201214191854.9050-8-nramas@linux.microsoft.com> (raw)
In-Reply-To: <20201214191854.9050-1-nramas@linux.microsoft.com>

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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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2020-12-14 19:20 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-14 19:18 [PATCH v11 0/8] Carry forward IMA measurement log on kexec on ARM64 Lakshmi Ramasubramanian
2020-12-14 19:18 ` Lakshmi Ramasubramanian
2020-12-14 19:18 ` [PATCH v11 1/8] powerpc: Fix compiler warnings and errors Lakshmi Ramasubramanian
2020-12-14 19:18   ` Lakshmi Ramasubramanian
2020-12-14 19:18 ` [PATCH v11 2/8] powerpc: Move ima buffer functions to drivers/of/kexec.c Lakshmi Ramasubramanian
2020-12-14 19:18   ` Lakshmi Ramasubramanian
2020-12-15 18:16   ` Rob Herring
2020-12-15 18:16     ` Rob Herring
2020-12-16 16:58     ` Lakshmi Ramasubramanian
2020-12-16 16:58       ` Lakshmi Ramasubramanian
2020-12-14 19:18 ` [PATCH v11 3/8] powerpc: Use ima kexec node functions Lakshmi Ramasubramanian
2020-12-14 19:18   ` Lakshmi Ramasubramanian
2020-12-14 19:18 ` [PATCH v11 4/8] powerpc: Move remove_ima_buffer() to drivers/of/kexec.c Lakshmi Ramasubramanian
2020-12-14 19:18   ` Lakshmi Ramasubramanian
2020-12-14 19:18 ` [PATCH v11 5/8] powerpc: Move ima_get_kexec_buffer() and ima_free_kexec_buffer() to ima Lakshmi Ramasubramanian
2020-12-14 19:18   ` Lakshmi Ramasubramanian
2020-12-14 19:18 ` [PATCH v11 6/8] powerpc: Move arch_ima_add_kexec_buffer " Lakshmi Ramasubramanian
2020-12-14 19:18   ` Lakshmi Ramasubramanian
2020-12-14 19:18 ` Lakshmi Ramasubramanian [this message]
2020-12-14 19:18   ` [PATCH v11 7/8] arm64: Free DTB buffer if fdt_open_into() fails Lakshmi Ramasubramanian
2020-12-14 19:18 ` [PATCH v11 8/8] arm64: Add IMA log information in kimage used for kexec Lakshmi Ramasubramanian
2020-12-14 19:18   ` Lakshmi Ramasubramanian

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