Hello, we reported a performance issue for this commit in https://lore.kernel.org/all/202403041300.a7fb1462-yujie.liu@xxxxxxxxx/ now we noticed a persistent crash issue: a0e2dab44d22b913 6613d82e617dd7eb8b0c40b2fe3 ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :100 99% 100:100 dmesg.EIP:restore_all_switch_stack :100 99% 100:100 dmesg.Kernel_panic-not_syncing:Fatal_exception :100 99% 100:100 dmesg.general_protection_fault:#[##] below details FYI. kernel test robot noticed "general_protection_fault:#[##]" on: commit: 6613d82e617dd7eb8b0c40b2fe3acea655b1d611 ("x86/bugs: Use ALTERNATIVE() instead of mds_user_clear static key") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [test failed on linus/master 70293240c5ce675a67bfc48f419b093023b862b3] [test failed on linux-next/master 13ee4a7161b6fd938aef6688ff43b163f6d83e37] in testcase: trinity version: with following parameters: runtime: 600s compiler: clang-17 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-lkp/202403281553.79f5a16f-lkp@xxxxxxxxx [ 25.175767][ T670] VFS: Warning: trinity-c2 using old stat() call. Recompile your binary. [ 25.245597][ T669] general protection fault: 0000 [#1] PREEMPT SMP [ 25.246417][ T669] CPU: 1 PID: 669 Comm: trinity-c1 Not tainted 6.8.0-rc5-00004-g6613d82e617d #1 85a4928d2e6b42899c3861e57e26bdc646c4c5f9 [ 25.247743][ T669] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 25.248865][ T669] EIP: restore_all_switch_stack (kbuild/src/consumer/arch/x86/entry/entry_32.S:957) [ 25.249510][ T669] Code: 4c 24 10 36 89 48 fc 8b 4c 24 0c 81 e1 ff ff 00 00 36 89 48 f8 8b 4c 24 08 36 89 48 f4 8b 4c 24 04 36 89 48 f0 59 8d 60 f0 58 <0f> 00 2d 00 94 d5 c1 cf 6a 00 68 88 6b d4 c1 eb 00 fc 0f a0 50 b8 All code ======== 0: 4c 24 10 rex.WR and $0x10,%al 3: 36 89 48 fc ss mov %ecx,-0x4(%rax) 7: 8b 4c 24 0c mov 0xc(%rsp),%ecx b: 81 e1 ff ff 00 00 and $0xffff,%ecx 11: 36 89 48 f8 ss mov %ecx,-0x8(%rax) 15: 8b 4c 24 08 mov 0x8(%rsp),%ecx 19: 36 89 48 f4 ss mov %ecx,-0xc(%rax) 1d: 8b 4c 24 04 mov 0x4(%rsp),%ecx 21: 36 89 48 f0 ss mov %ecx,-0x10(%rax) 25: 59 pop %rcx 26: 8d 60 f0 lea -0x10(%rax),%esp 29: 58 pop %rax 2a:* 0f 00 2d 00 94 d5 c1 verw -0x3e2a6c00(%rip) # 0xffffffffc1d59431 <-- trapping instruction 31: cf iret 32: 6a 00 push $0x0 34: 68 88 6b d4 c1 push $0xffffffffc1d46b88 39: eb 00 jmp 0x3b 3b: fc cld 3c: 0f a0 push %fs 3e: 50 push %rax 3f: b8 .byte 0xb8 Code starting with the faulting instruction =========================================== 0: 0f 00 2d 00 94 d5 c1 verw -0x3e2a6c00(%rip) # 0xffffffffc1d59407 7: cf iret 8: 6a 00 push $0x0 a: 68 88 6b d4 c1 push $0xffffffffc1d46b88 f: eb 00 jmp 0x11 11: fc cld 12: 0f a0 push %fs 14: 50 push %rax 15: b8 .byte 0xb8 [ 25.251494][ T669] EAX: 00000000 EBX: 000001a0 ECX: 000001a1 EDX: 00000000 [ 25.252271][ T669] ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: ffa2efdc [ 25.253037][ T669] DS: 0000 ES: 0000 FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010046 [ 25.253892][ T669] CR0: 80050033 CR2: b7dabd6e CR3: 2cc341c0 CR4: 000406b0 [ 25.254655][ T669] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 25.255413][ T669] DR6: fffe0ff0 DR7: 00000400 [ 25.255952][ T669] Call Trace: [ 25.256376][ T669] ? __die_body (kbuild/src/consumer/arch/x86/kernel/dumpstack.c:478 kbuild/src/consumer/arch/x86/kernel/dumpstack.c:420) [ 25.256907][ T669] ? die_addr (kbuild/src/consumer/arch/x86/kernel/dumpstack.c:?) [ 25.257411][ T669] ? exc_general_protection (kbuild/src/consumer/arch/x86/kernel/traps.c:698) [ 25.258067][ T669] ? __entry_text_start (??:?) [ 25.258691][ T669] ? irqentry_exit_to_user_mode (kbuild/src/consumer/kernel/entry/common.c:228) The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20240328/202403281553.79f5a16f-lkp@xxxxxxxxx -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
