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6aa478e8-b8ff-41a5-d5fe-08dea5c8fc06 X-MS-Exchange-CrossTenant-AuthSource: PH0PR11MB5832.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Apr 2026 08:26:17.5340 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: K05MPFNueKBsA218IWnpTC8LxOyvLpCap+O0RonE+jKQidM8Hlr1sAQiYFHLuOd+PW8nW9SBaaZDw9cvCtNrxw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA4PR11MB9297 X-OriginatorOrg: intel.com Hello, by this commit, we noticed the expected config diff: ==================== PARENT FIRST_BAD KCONFIGS fdcbb1bc06508eb7ad961b3876b16382ae678ef8 ==================== --- /pkg/linux/x86_64-rhel-9.4-kselftests/gcc-14/fdcbb1bc06508eb7ad961b3876b16382ae678ef8/.config 2026-04-26 22:54:11.801204874 +0200 +++ /pkg/linux/x86_64-rhel-9.4-kselftests/gcc-14/599bbba5a36f6de57ab14c373c25881e2b5273f5/.config 2026-04-26 22:01:12.692502621 +0200 @@ -8959,8 +8959,8 @@ CONFIG_ENCRYPTED_KEYS=y CONFIG_KEY_DH_OPERATIONS=y CONFIG_KEY_NOTIFICATIONS=y # CONFIG_SECURITY_DMESG_RESTRICT is not set -CONFIG_PROC_MEM_ALWAYS_FORCE=y -# CONFIG_PROC_MEM_FORCE_PTRACE is not set +# CONFIG_PROC_MEM_ALWAYS_FORCE is not set +CONFIG_PROC_MEM_FORCE_PTRACE=y # CONFIG_PROC_MEM_NO_FORCE is not set CONFIG_SECURITY=y CONFIG_HAS_SECURITY_AUDIT=y then we saw below two cases failed upon this commit: ========================================================================================= tbox_group/testcase/rootfs/kconfig/compiler/group/sc_nr_hugepages: igk-rpl-d03/kernel-selftests/debian-13-x86_64-20250902.cgz/x86_64-rhel-9.4-kselftests/gcc-14/mm/2 fdcbb1bc06508eb7 599bbba5a36f6de57ab14c373c2 ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :9 67% 6:6 kernel-selftests.mm.ksft_ksm.sh.fail :9 67% 6:6 kernel-selftests.mm.ksft_mkdirty.sh.fail we also noticed there is a fix commit in linux-next/master now, but we still saw same failures in our tests if directly test upon it. below full report FYI. kernel test robot noticed "kernel-selftests.mm.ksft_mkdirty.sh.mkdirty.fail" on: commit: 599bbba5a36f6de57ab14c373c25881e2b5273f5 ("proc: make PROC_MEM_FORCE_PTRACE the Kconfig default") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [test failed on linus/master 254f49634ee16a731174d2ae34bc50bd5f45e731] [test failed on linux-next/master 7080e32d3f09d8688c4a87d81bdcc71f7f606b16] [test failed on fix commit a3907a3169d09ebaeef9631ab6a4534314545ef7] in testcase: kernel-selftests version: kernel-selftests-x86_64-9f2693489ef8-1_20260201 with following parameters: group: mm sc_nr_hugepages: 2 config: x86_64-rhel-9.4-kselftests compiler: gcc-14 test machine: 16 threads Intel(R) Core(TM) i7-13620H (Raptor Lake) 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 | Closes: https://lore.kernel.org/oe-lkp/202604290921.ac2bf5ff-lkp@intel.com below is from commit 599bbba5a3: # timeout set to 900 # selftests: mm: ksft_ksm.sh # TAP version 13 # # ----------------------------- # # running ./ksm_tests -H -s 100 # # ----------------------------- # # Number of normal pages: 0 # # Number of huge pages: 50 # # Total size: 100 MiB # # Total time: 0.196202091 s # # Average speed: 509.679 MiB/s # # [PASS] # ok 1 ksm_tests -H -s 100 # # ----------------------------- # # running ./ksm_tests -P -s 100 # # ----------------------------- # # Total size: 100 MiB # # Total time: 0.201963596 s # # Average speed: 495.139 MiB/s # # [PASS] # ok 2 ksm_tests -P -s 100 # # ---------------------------- # # running ./ksm_tests -M -p 10 # # ---------------------------- # # OK # # [PASS] # ok 3 ksm_tests -M -p 10 # # ---------------------- # # running ./ksm_tests -U # # ---------------------- # # OK # # [PASS] # ok 4 ksm_tests -U # # --------------------------------- # # running ./ksm_tests -Z -p 10 -z 0 # # --------------------------------- # # OK # # [PASS] # ok 5 ksm_tests -Z -p 10 -z 0 # # --------------------------------- # # running ./ksm_tests -Z -p 10 -z 1 # # --------------------------------- # # OK # # [PASS] # ok 6 ksm_tests -Z -p 10 -z 1 # # ------------------------------ # # running ./ksm_functional_tests # # ------------------------------ # # TAP version 13 # # 1..10 # # # [RUN] test_unmerge # # ok 1 Pages were unmerged # # # [RUN] test_unmerge_zero_pages # # ok 2 KSM zero pages were unmerged # # # [RUN] test_unmerge_discarded # # ok 3 Pages were unmerged # # # [RUN] test_unmerge_uffd_wp # # ok 4 Pages were unmerged # # # [RUN] test_prot_none # # not ok 5 ptrace write failed # # # [RUN] test_prctl # # ok 6 Setting/clearing PR_SET_MEMORY_MERGE works # # # [RUN] test_prctl_fork # # ok 7 PR_SET_MEMORY_MERGE value is inherited # # # [RUN] test_prctl_fork_exec # # ok 8 PR_SET_MEMORY_MERGE value is inherited # # # [RUN] test_prctl_unmerge # # ok 9 Pages were unmerged # # # [RUN] test_fork_ksm_merging_page_count # # ok 10 ksm_merging_pages is not inherited after fork # # Bail out! 1 out of 10 tests failed # # # Totals: pass:9 fail:1 xfail:0 xpass:0 skip:0 error:0 # # [FAIL] # not ok 7 ksm_functional_tests # exit=1 # hwpoison_inject # # SUMMARY: PASS=6 SKIP=0 FAIL=1 # 1..7 not ok 7 selftests: mm: ksft_ksm.sh # exit=1 ... # timeout set to 900 # selftests: mm: ksft_mkdirty.sh # TAP version 13 # # ----------------- # # running ./mkdirty # # ----------------- # # # [INFO] detected THP size: 2048 KiB # # TAP version 13 # # 1..6 # # # [INFO] PTRACE write access # # not ok 1 write() failed # # # [INFO] PTRACE write access to THP # # not ok 2 write() failed # # # [INFO] Page migration # # ok 3 SIGSEGV generated, page not modified # # # [INFO] Page migration of THP # # ok 4 SIGSEGV generated, page not modified # # # [INFO] PTE-mapping a THP # # ok 5 SIGSEGV generated, page not modified # # # [INFO] UFFDIO_COPY # # ok 6 SIGSEGV generated, page not modified # # Bail out! 2 out of 6 tests failed # # # Totals: pass:4 fail:2 xfail:0 xpass:0 skip:0 error:0 # # [FAIL] # not ok 1 mkdirty # exit=1 # hwpoison_inject # # SUMMARY: PASS=0 SKIP=0 FAIL=1 # 1..1 not ok 14 selftests: mm: ksft_mkdirty.sh # exit=1 below is from [test failed on fix commit a3907a3169d09ebaeef9631ab6a4534314545ef7] # timeout set to 900 # selftests: mm: ksft_ksm.sh # TAP version 13 # # ----------------------------- # # running ./ksm_tests -H -s 100 # # ----------------------------- # # Number of normal pages: 0 # # Number of huge pages: 50 # # Total size: 100 MiB # # Total time: 0.201459173 s # # Average speed: 496.378 MiB/s # # [PASS] # ok 1 ksm_tests -H -s 100 # # ----------------------------- # # running ./ksm_tests -P -s 100 # # ----------------------------- # # Total size: 100 MiB # # Total time: 0.197418993 s # # Average speed: 506.537 MiB/s # # [PASS] # ok 2 ksm_tests -P -s 100 # # ---------------------------- # # running ./ksm_tests -M -p 10 # # ---------------------------- # # OK # # [PASS] # ok 3 ksm_tests -M -p 10 # # ---------------------- # # running ./ksm_tests -U # # ---------------------- # # OK # # [PASS] # ok 4 ksm_tests -U # # --------------------------------- # # running ./ksm_tests -Z -p 10 -z 0 # # --------------------------------- # # OK # # [PASS] # ok 5 ksm_tests -Z -p 10 -z 0 # # --------------------------------- # # running ./ksm_tests -Z -p 10 -z 1 # # --------------------------------- # # OK # # [PASS] # ok 6 ksm_tests -Z -p 10 -z 1 # # ------------------------------ # # running ./ksm_functional_tests # # ------------------------------ # # TAP version 13 # # 1..10 # # # [RUN] test_unmerge # # ok 1 Pages were unmerged # # # [RUN] test_unmerge_zero_pages # # ok 2 KSM zero pages were unmerged # # # [RUN] test_unmerge_discarded # # ok 3 Pages were unmerged # # # [RUN] test_unmerge_uffd_wp # # ok 4 Pages were unmerged # # # [RUN] test_prot_none # # not ok 5 ptrace write failed # # # [RUN] test_prctl # # ok 6 Setting/clearing PR_SET_MEMORY_MERGE works # # # [RUN] test_prctl_fork # # ok 7 PR_SET_MEMORY_MERGE value is inherited # # # [RUN] test_prctl_fork_exec # # ok 8 PR_SET_MEMORY_MERGE value is inherited # # # [RUN] test_prctl_unmerge # # ok 9 Pages were unmerged # # # [RUN] test_fork_ksm_merging_page_count # # ok 10 ksm_merging_pages is not inherited after fork # # Bail out! 1 out of 10 tests failed # # # Totals: pass:9 fail:1 xfail:0 xpass:0 skip:0 error:0 # # [FAIL] # not ok 7 ksm_functional_tests # exit=1 # hwpoison_inject # # SUMMARY: PASS=6 SKIP=0 FAIL=1 # 1..7 not ok 7 selftests: mm: ksft_ksm.sh # exit=1 ... # timeout set to 900 # selftests: mm: ksft_mkdirty.sh # TAP version 13 # # ----------------- # # running ./mkdirty # # ----------------- # # # [INFO] detected THP size: 2048 KiB # # TAP version 13 # # 1..6 # # # [INFO] PTRACE write access # # not ok 1 write() failed # # # [INFO] PTRACE write access to THP # # not ok 2 write() failed # # # [INFO] Page migration # # ok 3 SIGSEGV generated, page not modified # # # [INFO] Page migration of THP # # ok 4 SIGSEGV generated, page not modified # # # [INFO] PTE-mapping a THP # # ok 5 SIGSEGV generated, page not modified # # # [INFO] UFFDIO_COPY # # ok 6 SIGSEGV generated, page not modified # # Bail out! 2 out of 6 tests failed # # # Totals: pass:4 fail:2 xfail:0 xpass:0 skip:0 error:0 # # [FAIL] # not ok 1 mkdirty # exit=1 # hwpoison_inject # # SUMMARY: PASS=0 SKIP=0 FAIL=1 # 1..1 not ok 14 selftests: mm: ksft_mkdirty.sh # exit=1 The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260429/202604290921.ac2bf5ff-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki