linux-kernel - Re: [PATCH] x86/sgx: Replace kmalloc() + copy_from_user() with memdup

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Message-ID: <202509211747.1edb60f-lkp@intel.com>
Date: Sun, 21 Sep 2025 17:59:33 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Thorsten Blum <thorsten.blum@...ux.dev>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-sgx@...r.kernel.org>,
	Jarkko Sakkinen <jarkko@...nel.org>, Dave Hansen
	<dave.hansen@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de>, "Ingo
 Molnar" <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, <x86@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>, Thorsten Blum <thorsten.blum@...ux.dev>,
	<linux-kernel@...r.kernel.org>, <oliver.sang@...el.com>
Subject: Re: [PATCH] x86/sgx: Replace kmalloc() + copy_from_user() with
 memdup_user()



Hello,

kernel test robot noticed "kernel-selftests.sgx.test_sgx.enclave.tcs_entry.fail" on:

commit: c407010c166bcf30f9400bf0a4a4ec81c0149b81 ("[PATCH] x86/sgx: Replace kmalloc() + copy_from_user() with memdup_user()")
url: https://github.com/intel-lab-lkp/linux/commits/Thorsten-Blum/x86-sgx-Replace-kmalloc-copy_from_user-with-memdup_user/20250909-041627
base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git ed16618c380c32c68c06186d0ccbb0d5e0586e59
patch link: https://lore.kernel.org/all/20250908201229.440105-2-thorsten.blum@linux.dev/
patch subject: [PATCH] x86/sgx: Replace kmalloc() + copy_from_user() with memdup_user()

in testcase: kernel-selftests
version: kernel-selftests-x86_64-79e8447ec662-1_20250914
with following parameters:

	group: sgx



config: x86_64-rhel-9.4-kselftests
compiler: gcc-14
test machine: 16 threads 1 sockets Intel(R) Xeon(R) E-2278G CPU @ 3.40GHz (Coffee Lake-E) with 32G memory

(please refer to attached dmesg/kmsg for entire log/backtrace)



If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202509211747.1edb60f-lkp@intel.com


besides, we also observed below tests failed on this commit while passing
without this patch.

=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/group:
  lkp-cfl-e1/kernel-selftests/debian-13-x86_64-20250902.cgz/x86_64-rhel-9.4-kselftests/gcc-14/sgx

ed16618c380c32c6 c407010c166bcf30f9400bf0a4a
---------------- ---------------------------
       fail:runs  %reproduction    fail:runs
           |             |             |
           :6          100%           6:6     kernel-selftests.sgx.test_sgx.enclave.clobbered_vdso.fail
           :6          100%           6:6     kernel-selftests.sgx.test_sgx.enclave.clobbered_vdso_and_user_function.fail
           :6          100%           6:6     kernel-selftests.sgx.test_sgx.enclave.pte_permissions.fail
           :6          100%           6:6     kernel-selftests.sgx.test_sgx.enclave.tcs_entry.fail
           :6          100%           6:6     kernel-selftests.sgx.test_sgx.enclave.unclobbered_vdso.fail
           :6          100%           6:6     kernel-selftests.sgx.test_sgx.enclave.unclobbered_vdso_oversubscribed.fail
           :6          100%           6:6     kernel-selftests.sgx.test_sgx.fail



# #  RUN           enclave.tcs_entry ...
# SGX_IOC_ENCLAVE_CREATE failed: Input/output error
# # main.c:231:tcs_entry:0x0000000000000000 0x0000000000002000 0x03
# # main.c:231:tcs_entry:0x0000000000002000 0x0000000000002000 0x05
# # main.c:231:tcs_entry:0x0000000000004000 0x0000000000007000 0x03
# # main.c:231:tcs_entry:0x000000000000b000 0x0000000000001000 0x03
# # main.c:246:tcs_entry:Failed to initialize the test enclave.
# # main.c:578:tcs_entry:Expected 0 (0) != setup_test_encl(ENCL_HEAP_SIZE_DEFAULT, &self->encl, _metadata) (0)
# # tcs_entry: Test terminated by assertion
# #          FAIL  enclave.tcs_entry
# not ok 6 enclave.tcs_entry



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250921/202509211747.1edb60f-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki