From: Jarkko Sakkinen <jarkko@kernel.org>
To: linux-sgx@vger.kernel.org
Cc: Jarkko Sakkinen <jarkko@kernel.org>,
stable@vger.kernel.org, Dave Hansen <dave.hansen@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Serge Ayoun <serge.ayoun@intel.com>,
Sean Christopherson <seanjc@google.com>,
Jethro Beekman <jethro@fortanix.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH] x86/sgx: Fix a resource leak in sgx_init()
Date: Tue, 2 Mar 2021 04:32:42 +0200 [thread overview]
Message-ID: <20210302023242.112285-1-jarkko@kernel.org> (raw)
If sgx_page_cache_init() fails in the middle, a trivial return statement
causes unused memory and virtual address space reserved for the EPC
section, not freed. Fix this by using the same rollback, as when
sgx_page_reclaimer_init() fails.
Cc: stable@vger.kernel.org # 5.11
Fixes: e7e0545299d8 ("x86/sgx: Initialize metadata for Enclave Page Cache (EPC) sections")
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
---
arch/x86/kernel/cpu/sgx/main.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index 8df81a3ed945..52d070fb4c9a 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -708,8 +708,10 @@ static int __init sgx_init(void)
if (!cpu_feature_enabled(X86_FEATURE_SGX))
return -ENODEV;
- if (!sgx_page_cache_init())
- return -ENOMEM;
+ if (!sgx_page_cache_init()) {
+ ret = -ENOMEM;
+ goto err_page_cache;
+ }
if (!sgx_page_reclaimer_init()) {
ret = -ENOMEM;
--
2.30.1
reply other threads:[~2021-03-02 7:48 UTC|newest]
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