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From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: linux-sgx@vger.kernel.org
Subject: [PATCH for_v23 v2 0/9] x86/sgx: Misc page related fixes
Date: Thu, 10 Oct 2019 16:20:59 -0700
Message-ID: <20191010232108.27075-1-sean.j.christopherson@intel.com> (raw)

Two critical bug fixes for a memory leak in sgx_encl_destroy() and a
livelock due to the EPC page free count getting corrupted.  The rest of
the patches are minor bug fixes and enhancements I collected in the
process of hunting down the livelock.

v2: Fully fix the memory leak, which was hilariously worse than originally
    thought.  Fun fact, the leak has existed since v18, i.e. nearly a year.

Sean Christopherson (9):
  x86/sgx: WARN once if an enclave is released with unfreed EPC pages
  x86/sgx: Do not EWB SECS if the enclave is dead
  x86/sgx: Fix a memory leak in sgx_encl_destroy()
  x86/sgx: WARN on any non-zero return from __eremove()
  x86/sgx: WARN only once if EREMOVE fails
  x86/sgx: Split second half of sgx_free_page() to a separate helper
  x86/sgx: Use the post-reclaim variant of __sgx_free_page()
  x86/sgx: Don't update free page count if EPC section allocation fails
  x86/sgx: Reinstate per EPC section free page counts

 arch/x86/kernel/cpu/sgx/encl.c    | 34 ++++++++++++-------
 arch/x86/kernel/cpu/sgx/ioctl.c   |  6 ++--
 arch/x86/kernel/cpu/sgx/main.c    | 54 ++++++++++++++++++++++---------
 arch/x86/kernel/cpu/sgx/reclaim.c | 25 +++++++-------
 arch/x86/kernel/cpu/sgx/sgx.h     | 19 ++++++++++-
 5 files changed, 96 insertions(+), 42 deletions(-)

-- 
2.22.0


             reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-10 23:20 Sean Christopherson [this message]
2019-10-10 23:21 ` [PATCH for_v23 v2 1/9] x86/sgx: WARN once if an enclave is released with unfreed EPC pages Sean Christopherson
2019-10-10 23:21 ` [PATCH for_v23 v2 2/9] x86/sgx: Do not EWB SECS if the enclave is dead Sean Christopherson
2019-10-10 23:21 ` [PATCH for_v23 v2 3/9] x86/sgx: Fix a memory leak in sgx_encl_destroy() Sean Christopherson
2019-10-10 23:21 ` [PATCH for_v23 v2 4/9] x86/sgx: WARN on any non-zero return from __eremove() Sean Christopherson
2019-10-10 23:21 ` [PATCH for_v23 v2 5/9] x86/sgx: WARN only once if EREMOVE fails Sean Christopherson
2019-10-10 23:21 ` [PATCH for_v23 v2 6/9] x86/sgx: Split second half of sgx_free_page() to a separate helper Sean Christopherson
2019-10-10 23:21 ` [PATCH for_v23 v2 7/9] x86/sgx: Use the post-reclaim variant of __sgx_free_page() Sean Christopherson
2019-10-10 23:21 ` [PATCH for_v23 v2 8/9] x86/sgx: Don't update free page count if EPC section allocation fails Sean Christopherson
2019-10-10 23:21 ` [PATCH for_v23 v2 9/9] x86/sgx: Reinstate per EPC section free page counts Sean Christopherson

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