From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: linux-sgx@vger.kernel.org
Cc: sean.j.christopherson@intel.com, serge.ayoun@intel.com,
shay.katz-zamir@intel.com,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Subject: [PATCH RESEND 10/11] x86/sgx: Free VA slot when the EWB flow fails
Date: Thu, 12 Sep 2019 20:47:19 +0100 [thread overview]
Message-ID: <20190912194720.7107-11-jarkko.sakkinen@linux.intel.com> (raw)
In-Reply-To: <20190912194720.7107-1-jarkko.sakkinen@linux.intel.com>
Call sgx_free_va_slot() when the EWB flow fails. Otherwise, they will
leak in the failure case.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
arch/x86/kernel/cpu/sgx/reclaim.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/cpu/sgx/reclaim.c b/arch/x86/kernel/cpu/sgx/reclaim.c
index f96f4c70f4a6..fb41141a28a7 100644
--- a/arch/x86/kernel/cpu/sgx/reclaim.c
+++ b/arch/x86/kernel/cpu/sgx/reclaim.c
@@ -341,12 +341,15 @@ static void sgx_encl_ewb(struct sgx_epc_page *epc_page,
}
}
- if (ret)
+ if (ret) {
if (encls_failed(ret) || encls_returned_code(ret))
ENCLS_WARN(ret, "EWB");
- encl_page->desc |= va_offset;
- encl_page->va_page = va_page;
+ sgx_free_va_slot(va_page, va_offset);
+ } else {
+ encl_page->desc |= va_offset;
+ encl_page->va_page = va_page;
+ }
}
static void sgx_reclaimer_write(struct sgx_epc_page *epc_page)
--
2.20.1
next prev parent reply other threads:[~2019-09-12 19:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-12 19:47 [PATCH RESEND 00/11] v23 updates Jarkko Sakkinen
2019-09-12 19:47 ` [PATCH RESEND 01/11] selftest/x86/sgx: Remove encl_piggy.h Jarkko Sakkinen
2019-09-12 19:47 ` [PATCH RESEND 02/11] x86/sgx: Clean up internal includes Jarkko Sakkinen
2019-09-12 19:47 ` [PATCH RESEND 03/11] x86/sgx: Write backing storage only if EWB is successful Jarkko Sakkinen
2019-09-12 19:47 ` [PATCH RESEND 04/11] x86/sgx: Rename 'j' as 'cnt' in sgx_reclaim_pages() Jarkko Sakkinen
2019-09-12 19:47 ` [PATCH RESEND 05/11] x86/sgx: Turn encls_failed() as inline function Jarkko Sakkinen
2019-09-12 19:47 ` [PATCH RESEND 06/11] x86/sgx: Move sgx_einit() to encls.c Jarkko Sakkinen
2019-09-12 19:47 ` [PATCH RESEND 07/11] x86/sgx: Remove pages in sgx_reclaimer_write() Jarkko Sakkinen
2019-09-12 19:47 ` [PATCH RESEND 08/11] x86/sgx: Calculate page index " Jarkko Sakkinen
2019-09-12 19:47 ` [PATCH RESEND 09/11] x86/sgx: Move SGX_ENCL_DEAD check to sgx_reclaimer_write() Jarkko Sakkinen
2019-09-12 19:47 ` Jarkko Sakkinen [this message]
2019-09-12 19:47 ` [PATCH RESEND 11/11] x86/sgx: Call sgx_encl_destroy() when the EWB flow fails Jarkko Sakkinen
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