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Peter Anvin" , Linus Torvalds , "Oleg Nesterov" , Dave Hansen , Thomas Gleixner , Uros Bizjak , , Andy Lutomirski , Andrew Morton , Dave Hansen , Peter Zijlstra , Subject: Re: [PATCH 1/1] headers/deps: x86/fpu: Make task_struct::thread constant size Message-ID: <202403251006.3568d460-lkp@intel.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20240320131908.2708438-2-mingo@kernel.org> X-ClientProxiedBy: SI2PR01CA0014.apcprd01.prod.exchangelabs.com (2603:1096:4:191::17) To LV3PR11MB8603.namprd11.prod.outlook.com (2603:10b6:408:1b6::9) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV3PR11MB8603:EE_|PH0PR11MB7657:EE_ X-MS-Office365-Filtering-Correlation-Id: dd1ad42c-b562-4342-274a-08dc4c90d8dc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: apdf5ckXbBFTEu96605W2B/yhgFam0pwgZZ+iICNtc63F+givt9ySNrrYgC7SV/+Z6w9ramKAoFnD5EqEN+N7LRLzNlv7Z88InHYtVOdTzeE4K/7+M+QKhVYfM+zG33tAUPI9qA9nT0lAt128/fp4rHf5AvmSbjIb5myI4tiVVyOoc2H0P4ixcpRD9GPyCoILF6KX6ArwZICsfavtqi+acPaBbJicGBC4x0GHUcCVz9M5jXe52qZ+xQwE44j7oPlErnxAg/Zv3ayO/izwq/dF5G4nxx8EwpfijMDrUbach5COa3MndIHrlCB4QTd0ry9hAcbgsoavkexL+wkDTRRmSi4+fnsY+XMK3A8sOCTtkHtorkv9LPyWvh2Ur02xoxSZBPy/bSYKweIg+i3URtIroFTVb1ic5gwhHqdqQo9OM8/jDRErI9gbr/Kk9+MspOgwJO65dE8U1gQ7pGo9yGZWiSXqtCqsIQoXefYWUv06Vlk2q37sANFGFgdUE4CaifgWXi3hymZKv71sK2kyBWLPyzuIn0zHYUgIcXOMTm9CtCcK0HR4OIp5U1XcO0nlo2sEkBU1bg1kJzxyLUV6ea9C4KCcZcMmXMuUay3Ny7dvLzwJIZTFq/HzqTYNDWPgUaQ X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:LV3PR11MB8603.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(376005)(7416005)(1800799015)(366007);DIR:OUT;SFP:1101; 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[ 7.844686][ T58] WARNING: CPU: 0 PID: 58 at arch/x86/mm/extable.c:126 fixup_exception (arch/x86/mm/extable.c:126 arch/x86/mm/extable.c:275) [ 7.846556][ T58] Modules linked in: [ 7.846556][ T58] CPU: 0 PID: 58 Comm: modprobe Tainted: G W 6.8.0-rc4-00056-g9738bc8321cc #1 [ 7.846556][ T58] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 7.846556][ T58] EIP: fixup_exception (arch/x86/mm/extable.c:126 arch/x86/mm/extable.c:275) [ 7.846556][ T58] Code: 88 0d a4 50 22 ce e8 9b 07 01 00 0f 0b e9 a8 fe ff ff 89 44 24 04 b2 01 c7 04 24 68 29 a9 cd 88 15 a6 50 22 ce e8 7c 07 01 00 <0f> 0b e9 c0 fe ff ff 0f 0b ba 88 f8 38 ce e9 e9 fe ff ff 8d 74 26 All code ======== 0: 88 0d a4 50 22 ce mov %cl,-0x31ddaf5c(%rip) # 0xffffffffce2250aa 6: e8 9b 07 01 00 call 0x107a6 b: 0f 0b ud2 d: e9 a8 fe ff ff jmp 0xfffffffffffffeba 12: 89 44 24 04 mov %eax,0x4(%rsp) 16: b2 01 mov $0x1,%dl 18: c7 04 24 68 29 a9 cd movl $0xcda92968,(%rsp) 1f: 88 15 a6 50 22 ce mov %dl,-0x31ddaf5a(%rip) # 0xffffffffce2250cb 25: e8 7c 07 01 00 call 0x107a6 2a:* 0f 0b ud2 <-- trapping instruction 2c: e9 c0 fe ff ff jmp 0xfffffffffffffef1 31: 0f 0b ud2 33: ba 88 f8 38 ce mov $0xce38f888,%edx 38: e9 e9 fe ff ff jmp 0xffffffffffffff26 3d: 8d .byte 0x8d 3e: 74 26 je 0x66 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: e9 c0 fe ff ff jmp 0xfffffffffffffec7 7: 0f 0b ud2 9: ba 88 f8 38 ce mov $0xce38f888,%edx e: e9 e9 fe ff ff jmp 0xfffffffffffffefc 13: 8d .byte 0x8d 14: 74 26 je 0x3c [ 7.846556][ T58] EAX: 00000000 EBX: cdc38510 ECX: 00000000 EDX: 00000000 [ 7.846556][ T58] ESI: ea1abef0 EDI: 0000000d EBP: ea1abe5c ESP: ea1abde0 [ 7.846556][ T58] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010046 [ 7.846556][ T58] CR0: 80050033 CR2: bfda18db CR3: 29d1d000 CR4: 00040690 [ 7.846556][ T58] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 7.846556][ T58] DR6: fffe0ff0 DR7: 00000400 [ 7.846556][ T58] Call Trace: [ 7.846556][ T58] ? show_regs (arch/x86/kernel/dumpstack.c:479) [ 7.846556][ T58] ? fixup_exception (arch/x86/mm/extable.c:126 arch/x86/mm/extable.c:275) [ 7.846556][ T58] ? __warn (kernel/panic.c:677) [ 7.846556][ T58] ? fixup_exception (arch/x86/mm/extable.c:126 arch/x86/mm/extable.c:275) [ 7.846556][ T58] ? report_bug (lib/bug.c:180 lib/bug.c:219) [ 7.846556][ T58] ? exc_overflow (arch/x86/kernel/traps.c:251) [ 7.846556][ T58] ? handle_bug (arch/x86/kernel/traps.c:238) [ 7.846556][ T58] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 7.846556][ T58] ? handle_exception (arch/x86/entry/entry_32.S:1049) [ 7.846556][ T58] ? rt_mutex_debug_task_free (kernel/locking/rtmutex_api.c:487 (discriminator 11)) [ 7.846556][ T58] ? set_memory_global (arch/x86/mm/pat/set_memory.c:2298) [ 7.846556][ T58] ? exc_overflow (arch/x86/kernel/traps.c:251) [ 7.846556][ T58] ? fixup_exception (arch/x86/mm/extable.c:126 arch/x86/mm/extable.c:275) [ 7.846556][ T58] ? set_memory_global (arch/x86/mm/pat/set_memory.c:2298) [ 7.846556][ T58] ? exc_overflow (arch/x86/kernel/traps.c:251) [ 7.846556][ T58] ? fixup_exception (arch/x86/mm/extable.c:126 arch/x86/mm/extable.c:275) [ 7.846556][ T58] ? restore_fpregs_from_fpstate (arch/x86/kernel/fpu/core.c:188) [ 7.846556][ T58] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 7.846556][ T58] ? __delete_object (mm/kmemleak.c:798 (discriminator 3)) [ 7.846556][ T58] ? kvm_sched_clock_read (arch/x86/kernel/kvmclock.c:91) [ 7.846556][ T58] ? sched_clock_noinstr (arch/x86/kernel/tsc.c:267) [ 7.846556][ T58] ? local_clock_noinstr (kernel/sched/clock.c:282 kernel/sched/clock.c:306) [ 7.846556][ T58] ? exc_bounds (arch/x86/kernel/traps.c:643) [ 7.846556][ T58] exc_general_protection (arch/x86/kernel/traps.c:617 arch/x86/kernel/traps.c:677 arch/x86/kernel/traps.c:643) [ 7.846556][ T58] ? __delete_object (mm/kmemleak.c:798 (discriminator 3)) [ 7.846556][ T58] ? exc_bounds (arch/x86/kernel/traps.c:643) [ 7.846556][ T58] handle_exception (arch/x86/entry/entry_32.S:1049) [ 7.846556][ T58] EIP: restore_fpregs_from_fpstate (arch/x86/kernel/fpu/core.c:188) [ 7.846556][ T58] Code: eb 0a cc cc cc db e2 0f 77 db 45 f4 3e 8d 74 26 00 8b 3d ec f1 bc cd 8b 4d f4 8b 1d e8 f1 bc cd 21 fa 8d 79 40 21 d8 0f ae 2f <8b> 5d f8 8b 7d fc 89 ec 5d 31 c0 31 d2 31 c9 c3 8d 76 00 3e 8d 74 All code ======== 0: eb 0a jmp 0xc 2: cc int3 3: cc int3 4: cc int3 5: db e2 fnclex 7: 0f 77 emms 9: db 45 f4 fildl -0xc(%rbp) c: 3e 8d 74 26 00 ds lea 0x0(%rsi,%riz,1),%esi 11: 8b 3d ec f1 bc cd mov -0x32430e14(%rip),%edi # 0xffffffffcdbcf203 17: 8b 4d f4 mov -0xc(%rbp),%ecx 1a: 8b 1d e8 f1 bc cd mov -0x32430e18(%rip),%ebx # 0xffffffffcdbcf208 20: 21 fa and %edi,%edx 22: 8d 79 40 lea 0x40(%rcx),%edi 25: 21 d8 and %ebx,%eax 27: 0f ae 2f xrstor (%rdi) 2a:* 8b 5d f8 mov -0x8(%rbp),%ebx <-- trapping instruction 2d: 8b 7d fc mov -0x4(%rbp),%edi 30: 89 ec mov %ebp,%esp 32: 5d pop %rbp 33: 31 c0 xor %eax,%eax 35: 31 d2 xor %edx,%edx 37: 31 c9 xor %ecx,%ecx 39: c3 ret 3a: 8d 76 00 lea 0x0(%rsi),%esi 3d: 3e ds 3e: 8d .byte 0x8d 3f: 74 .byte 0x74 Code starting with the faulting instruction =========================================== 0: 8b 5d f8 mov -0x8(%rbp),%ebx 3: 8b 7d fc mov -0x4(%rbp),%edi 6: 89 ec mov %ebp,%esp 8: 5d pop %rbp 9: 31 c0 xor %eax,%eax b: 31 d2 xor %edx,%edx d: 31 c9 xor %ecx,%ecx f: c3 ret 10: 8d 76 00 lea 0x0(%rsi),%esi 13: 3e ds 14: 8d .byte 0x8d 15: 74 .byte 0x74 [ 7.846556][ T58] EAX: 00000007 EBX: 00000007 ECX: c2d836e0 EDX: 00000000 [ 7.846556][ T58] ESI: c2d836a0 EDI: c2d83720 EBP: ea1abf58 ESP: ea1abf4c [ 7.846556][ T58] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010002 [ 7.846556][ T58] ? exc_bounds (arch/x86/kernel/traps.c:643) [ 7.846556][ T58] ? restore_fpregs_from_fpstate (arch/x86/kernel/fpu/core.c:179 arch/x86/kernel/fpu/core.c:181) [ 7.846556][ T58] switch_fpu_return (arch/x86/include/asm/atomic.h:23 include/linux/atomic/atomic-arch-fallback.h:457 include/linux/jump_label.h:260 include/linux/jump_label.h:270 arch/x86/include/asm/trace/fpu.h:57 arch/x86/kernel/fpu/context.h:50 arch/x86/kernel/fpu/context.h:76 arch/x86/kernel/fpu/core.c:788) [ 7.846556][ T58] syscall_exit_to_user_mode (arch/x86/include/asm/entry-common.h:58 include/linux/entry-common.h:330 kernel/entry/common.c:201 kernel/entry/common.c:212) [ 7.846556][ T58] ? call_usermodehelper_exec_async (kernel/umh.c:114) [ 7.846556][ T58] ? call_usermodehelper (kernel/umh.c:65) [ 7.846556][ T58] ret_from_fork (arch/x86/kernel/process.c:157) [ 7.846556][ T58] ? call_usermodehelper (kernel/umh.c:65) [ 7.846556][ T58] ret_from_fork_asm (arch/x86/entry/entry_32.S:741) [ 7.846556][ T58] entry_INT80_32 (arch/x86/entry/entry_32.S:947) [ 7.846556][ T58] EIP: 0xb7ee70b0 [ 7.846556][ T58] Code: Unable to access opcode bytes at 0xb7ee7086. Code starting with the faulting instruction =========================================== The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20240325/202403251006.3568d460-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki