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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, kernel test robot noticed "segfault_at_ip_sp_error" on: commit: ba42b524a0408b5f92bd41edaee1ea84309ab9ae ("mm: init_mlocked_on_free_v3") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [test failed on linus/master c760b3725e52403dc1b28644fb09c47a83cacea6] [test failed on linux-next/master 3689b0ef08b70e4e03b82ebd37730a03a672853a] in testcase: rcutorture version: with following parameters: runtime: 300s test: default torture_type: tasks-tracing compiler: gcc-13 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) we didn't see clear hint in below dmesg information, but by further runs, the issue looks quite persistent: 6c47de3be3a021d8 ba42b524a0408b5f92bd41edaee ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :30 100% 30:30 dmesg.segfault_at_ip_sp_error so report this FYI what we observed and captured in our tests. 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/202405281425.92ece916-lkp@intel.com [ OK ] Started /etc/rc.local Compatibility. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. Starting watchdog daemon... [ 351.243261][ T1844] watchdog[1844]: segfault at 0 ip 00000000 sp bfd01fac error 4 in watchdog[49d000+2000] likely on CPU 1 (core 1, socket 0) [ 351.245577][ T1844] Code: Unable to access opcode bytes at 0xffffffd6. Code starting with the faulting instruction =========================================== [ 351.253843][ T1846] watchdog[1846]: segfault at 0 ip 00000000 sp bfd01f9c error 4 in watchdog[49d000+2000] likely on CPU 0 (core 0, socket 0) [ 351.256126][ T1846] Code: Unable to access opcode bytes at 0xffffffd6. Code starting with the faulting instruction =========================================== [FAILED] Failed to start watchdog daemon. See 'systemctl status watchdog.service' for details. The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20240528/202405281425.92ece916-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki