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master [test failed on linux-next/master b6270c3bca987530eafc6a15f9d54ecd0033e0e3] in testcase: boot compiler: clang-18 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +-------------------------+------------+------------+ | | 53d05c3162 | 218a562f27 | +-------------------------+------------+------------+ | segfault_at_ip_sp_error | 0 | 6 | +-------------------------+------------+------------+ 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/202410101245.48a4dc5b-oliver.sang@intel.com [ 10.259055][ T1] init: Error while reading from descriptor: Bad file descriptor /bin/sh: /proc/self/fd/9: No such file or directory [ 10.262474][ T1] init: mountall-shell post-stop process (108) terminated with status 1 LKP: ttyS0: 99: skip deploy intel ucode as no ucode is specified [ 10.379560][ T126] cat (126) used greatest stack depth: 5692 bytes left [ 10.415045][ T117] sed[117]: segfault at 0 ip 37e0ef44 sp 3f99b000 error 4 in libc-2.15.so[66f44,37da8000+19f000] likely on CPU 1 (core 1, socket 0) [ 10.416009][ T117] Code: eb 90 8d 02 e8 2d 18 09 00 eb c9 90 90 90 90 90 90 90 90 90 90 90 83 ec 0c 31 c9 89 34 24 8b 74 24 10 89 6c 24 08 89 7c 24 04 <8b> 2e f7 c5 20 00 00 00 89 e8 0f 95 c1 25 00 80 00 00 75 66 8b 56 All code ======== 0: eb 90 jmp 0xffffffffffffff92 2: 8d 02 lea (%rdx),%eax 4: e8 2d 18 09 00 callq 0x91836 9: eb c9 jmp 0xffffffffffffffd4 b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 83 ec 0c sub $0xc,%esp 19: 31 c9 xor %ecx,%ecx 1b: 89 34 24 mov %esi,(%rsp) 1e: 8b 74 24 10 mov 0x10(%rsp),%esi 22: 89 6c 24 08 mov %ebp,0x8(%rsp) 26: 89 7c 24 04 mov %edi,0x4(%rsp) 2a:* 8b 2e mov (%rsi),%ebp <-- trapping instruction 2c: f7 c5 20 00 00 00 test $0x20,%ebp 32: 89 e8 mov %ebp,%eax 34: 0f 95 c1 setne %cl 37: 25 00 80 00 00 and $0x8000,%eax 3c: 75 66 jne 0xa4 3e: 8b .byte 0x8b 3f: 56 push %rsi Code starting with the faulting instruction =========================================== 0: 8b 2e mov (%rsi),%ebp 2: f7 c5 20 00 00 00 test $0x20,%ebp 8: 89 e8 mov %ebp,%eax a: 0f 95 c1 setne %cl d: 25 00 80 00 00 and $0x8000,%eax 12: 75 66 jne 0x7a 14: 8b .byte 0x8b 15: 56 push %rsi LKP: ttyS0: 99: Kernel tests: Boot OK! LKP: ttyS0: 99: HOSTNAME vm-snb, MAC 52:54:00:12:34:56, kernel 6.12.0-rc2-00014-g218a562f273b 1 [ 10.441864][ T119] sed[119]: segfault at 0 ip 37de2f44 sp 3f88cf20 error 4 in libc-2.15.so[66f44,37d7c000+19f000] likely on CPU 0 (core 0, socket 0) [ 10.442831][ T119] Code: eb 90 8d 02 e8 2d 18 09 00 eb c9 90 90 90 90 90 90 90 90 90 90 90 83 ec 0c 31 c9 89 34 24 8b 74 24 10 89 6c 24 08 89 7c 24 04 <8b> 2e f7 c5 20 00 00 00 89 e8 0f 95 c1 25 00 80 00 00 75 66 8b 56 All code ======== 0: eb 90 jmp 0xffffffffffffff92 2: 8d 02 lea (%rdx),%eax 4: e8 2d 18 09 00 callq 0x91836 9: eb c9 jmp 0xffffffffffffffd4 b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 83 ec 0c sub $0xc,%esp 19: 31 c9 xor %ecx,%ecx 1b: 89 34 24 mov %esi,(%rsp) 1e: 8b 74 24 10 mov 0x10(%rsp),%esi 22: 89 6c 24 08 mov %ebp,0x8(%rsp) 26: 89 7c 24 04 mov %edi,0x4(%rsp) 2a:* 8b 2e mov (%rsi),%ebp <-- trapping instruction 2c: f7 c5 20 00 00 00 test $0x20,%ebp 32: 89 e8 mov %ebp,%eax 34: 0f 95 c1 setne %cl 37: 25 00 80 00 00 and $0x8000,%eax 3c: 75 66 jne 0xa4 3e: 8b .byte 0x8b 3f: 56 push %rsi Code starting with the faulting instruction =========================================== 0: 8b 2e mov (%rsi),%ebp 2: f7 c5 20 00 00 00 test $0x20,%ebp 8: 89 e8 mov %ebp,%eax a: 0f 95 c1 setne %cl d: 25 00 80 00 00 and $0x8000,%eax 12: 75 66 jne 0x7a 14: 8b .byte 0x8b 15: 56 push %rsi [ 10.550743][ T155] mkdir (155) used greatest stack depth: 5668 bytes left The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241010/202410101245.48a4dc5b-oliver.sang@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki