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Message-ID: <CA+G9fYv57AhE8CX+T_-OP_yi8tzNXpzS_OGZvjyKKgMDKUN4UA@mail.gmail.com> Date: Wed, 12 Jun 2024 17:26:08 +0530 From: Naresh Kamboju <naresh.kamboju@...aro.org> To: X86 ML <x86@...nel.org>, open list <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org, Linux Regressions <regressions@...ts.linux.dev> Cc: Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, Peter Zijlstra <peterz@...radead.org>, Arnd Bergmann <arnd@...db.de>, Dan Carpenter <dan.carpenter@...aro.org>, Anders Roxell <anders.roxell@...aro.org> Subject: Bad FPU state detected at restore_fpregs_from_fpstate, reinitializing FPU registers. WARNING: at arch/x86/mm/extable.c:127 fixup_exception The following kernel warnings are noticed on i386 running Linux next-20240612 tag while booting the ftrace enabled kernel. This is always reproducible kernel warning with i386. ( when running the i386 kernel on an x86 machine I always do this) Extra Kconfig: CONFIG_FTRACE_SYSCALLS=y Bad FPU state detected at restore_fpregs_from_fpstate+0x3d/0x74, reinitializing FPU registers. WARNING: CPU: 0 PID: 1 at arch/x86/mm/extable.c:127 fixup_exception+0x41e/0x45c Reported-by: Linux Kernel Functional Testing <lkft@...aro.org> The detailed test log and build log links provided in the bottom of this email. Boot: ------- Linux version 6.10.0-rc3-next-20240612 (tuxmake@...make) (i686-linux-gnu-gcc (Debian 13.2.0-12) 13.2.0, GNU ld (GNU Binutils for Debian) 2.42) #1 SMP PREEMPT_DYNAMIC @1718178142 ... [ 15.714445] Run /sbin/init as init process [ 15.728653] ------------[ cut here ]------------ [ 15.733278] Bad FPU state detected at restore_fpregs_from_fpstate+0x3d/0x74, reinitializing FPU registers. [ 15.733285] WARNING: CPU: 1 PID: 1 at arch/x86/mm/extable.c:127 fixup_exception (arch/x86/mm/extable.c:127 (discriminator 2) arch/x86/mm/extable.c:340 (discriminator 2)) [ 15.733289] Modules linked in: [ 15.733291] CPU: 1 PID: 1 Comm: init Not tainted 6.10.0-rc3-next-20240612 #1 [ 15.733293] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.7 12/07/2021 [ 15.733294] EIP: fixup_exception (arch/x86/mm/extable.c:127 (discriminator 2) arch/x86/mm/extable.c:340 (discriminator 2)) [ 15.733296] Code: e8 03 ed 00 00 0f 0b eb cb 0f 0b ba 4c 59 53 d2 eb b6 b2 01 88 15 c0 d3 38 d2 89 44 24 04 c7 04 24 d8 17 fd d1 e8 de ec 00 00 <0f> 0b e9 ee fd ff ff 8d b4 26 00 00 00 00 0f 0b ba 4c 59 53 d2 e9 All code ======== 0: e8 03 ed 00 00 callq 0xed08 5: 0f 0b ud2 7: eb cb jmp 0xffffffffffffffd4 9: 0f 0b ud2 b: ba 4c 59 53 d2 mov $0xd253594c,%edx 10: eb b6 jmp 0xffffffffffffffc8 12: b2 01 mov $0x1,%dl 14: 88 15 c0 d3 38 d2 mov %dl,-0x2dc72c40(%rip) # 0xffffffffd238d3da 1a: 89 44 24 04 mov %eax,0x4(%rsp) 1e: c7 04 24 d8 17 fd d1 movl $0xd1fd17d8,(%rsp) 25: e8 de ec 00 00 callq 0xed08 2a:* 0f 0b ud2 <-- trapping instruction 2c: e9 ee fd ff ff jmpq 0xfffffffffffffe1f 31: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 38: 0f 0b ud2 3a: ba 4c 59 53 d2 mov $0xd253594c,%edx 3f: e9 .byte 0xe9 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: e9 ee fd ff ff jmpq 0xfffffffffffffdf5 7: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi e: 0f 0b ud2 10: ba 4c 59 53 d2 mov $0xd253594c,%edx 15: e9 .byte 0xe9 [ 15.733298] EAX: 0000005e EBX: d2159678 ECX: 00000000 EDX: 00000002 [ 15.733299] ESI: c11efee8 EDI: 0000000d EBP: c11efe50 ESP: c11efdd0 [ 15.733300] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010086 [ 15.733302] CR0: 80050033 CR2: bfec4aab CR3: 02abc000 CR4: 003506d0 [ 15.733303] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 15.733304] DR6: fffe0ff0 DR7: 00000400 [ 15.733304] Call Trace: [ 15.733306] ? show_regs (arch/x86/kernel/dumpstack.c:479) [ 15.733308] ? fixup_exception (arch/x86/mm/extable.c:127 (discriminator 2) arch/x86/mm/extable.c:340 (discriminator 2)) [ 15.733310] ? __warn (kernel/panic.c:742) [ 15.733313] ? fixup_exception (arch/x86/mm/extable.c:127 (discriminator 2) arch/x86/mm/extable.c:340 (discriminator 2)) [ 15.733314] ? fixup_exception (arch/x86/mm/extable.c:127 (discriminator 2) arch/x86/mm/extable.c:340 (discriminator 2)) [ 15.733316] ? report_bug (lib/bug.c:180 lib/bug.c:219) [ 15.733320] ? exc_overflow (arch/x86/kernel/traps.c:252) [ 15.733321] ? handle_bug (arch/x86/kernel/traps.c:218) [ 15.733323] ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1)) [ 15.733324] ? console_unlock (kernel/printk/printk.c:3137 (discriminator 1)) [ 15.733326] ? handle_exception (arch/x86/entry/entry_32.S:1054) [ 15.733329] ? software_resume (kernel/power/hibernate.c:1024) [ 15.733332] ? set_pages_rw (arch/x86/mm/pat/set_memory.c:2356) [ 15.733334] ? exc_overflow (arch/x86/kernel/traps.c:252) [ 15.733336] ? fixup_exception (arch/x86/mm/extable.c:127 (discriminator 2) arch/x86/mm/extable.c:340 (discriminator 2)) [ 15.733337] ? set_pages_rw (arch/x86/mm/pat/set_memory.c:2356) [ 15.733340] ? exc_overflow (arch/x86/kernel/traps.c:252) [ 15.733341] ? fixup_exception (arch/x86/mm/extable.c:127 (discriminator 2) arch/x86/mm/extable.c:340 (discriminator 2)) [ 15.733342] ? restore_fpregs_from_fpstate (arch/x86/kernel/fpu/core.c:198) [ 15.733344] ? mt_find (lib/maple_tree.c:6956) [ 15.733347] ? get_random_u32 (arch/x86/include/asm/irqflags.h:42 arch/x86/include/asm/irqflags.h:77 arch/x86/include/asm/irqflags.h:135 drivers/char/random.c:532) [ 15.733349] ? _raw_spin_unlock (include/linux/spinlock_api_smp.h:143 (discriminator 3) kernel/locking/spinlock.c:186 (discriminator 3)) [ 15.733350] ? finalize_exec (fs/exec.c:1497) [ 15.733352] ? trace_preempt_on (kernel/trace/trace_preemptirq.c:105) [ 15.733354] ? finalize_exec (fs/exec.c:1497) [ 15.733355] ? exc_bounds (arch/x86/kernel/traps.c:644) [ 15.733356] exc_general_protection (arch/x86/kernel/traps.c:618 (discriminator 1) arch/x86/kernel/traps.c:678 (discriminator 1) arch/x86/kernel/traps.c:644 (discriminator 1)) [ 15.733357] ? finalize_exec (fs/exec.c:1497) [ 15.733359] ? exc_bounds (arch/x86/kernel/traps.c:644) [ 15.733361] handle_exception (arch/x86/entry/entry_32.S:1054) [ 15.733363] EIP: restore_fpregs_from_fpstate (arch/x86/kernel/fpu/core.c:198) [ 15.733364] Code: 7d fc 89 ca eb 09 cc cc cc db e2 0f 77 db 03 3e 8d 74 26 00 8b 3d ac 82 0b d2 8b 0d a8 82 0b d2 21 fa 8d 7b 40 21 c8 0f c7 1f <8b> 5d f8 8b 7d fc 89 ec 5d c3 2e 8d 74 26 00 3e 8d 74 26 00 0f ae All code ======== 0: 7d fc jge 0xfffffffffffffffe 2: 89 ca mov %ecx,%edx 4: eb 09 jmp 0xf 6: cc int3 7: cc int3 8: cc int3 9: db e2 fnclex b: 0f 77 emms d: db 03 fildl (%rbx) f: 3e 8d 74 26 00 lea %ds:0x0(%rsi,%riz,1),%esi 14: 8b 3d ac 82 0b d2 mov -0x2df47d54(%rip),%edi # 0xffffffffd20b82c6 1a: 8b 0d a8 82 0b d2 mov -0x2df47d58(%rip),%ecx # 0xffffffffd20b82c8 20: 21 fa and %edi,%edx 22: 8d 7b 40 lea 0x40(%rbx),%edi 25: 21 c8 and %ecx,%eax 27: 0f c7 1f xrstors (%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: c3 retq 34: 2e 8d 74 26 00 lea %cs:0x0(%rsi,%riz,1),%esi 39: 3e 8d 74 26 00 lea %ds:0x0(%rsi,%riz,1),%esi 3e: 0f .byte 0xf 3f: ae scas %es:(%rdi),%al 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: c3 retq a: 2e 8d 74 26 00 lea %cs:0x0(%rsi,%riz,1),%esi f: 3e 8d 74 26 00 lea %ds:0x0(%rsi,%riz,1),%esi 14: 0f .byte 0xf 15: ae scas %es:(%rdi),%al [ 15.733366] EAX: 0000001f EBX: c12288e0 ECX: 0000001f EDX: 00000000 [ 15.733367] ESI: c1228000 EDI: c1228920 EBP: c11eff4c ESP: c11eff44 [ 15.733368] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010002 [ 15.733369] ? __do_sys_newstat (fs/stat.c:439) [ 15.733372] ? exc_bounds (arch/x86/kernel/traps.c:644) [ 15.733373] ? exc_bounds (arch/x86/kernel/traps.c:644) [ 15.733374] ? restore_fpregs_from_fpstate (arch/x86/kernel/fpu/xstate.h:209 arch/x86/kernel/fpu/core.c:191) [ 15.733376] fpregs_restore_userregs (arch/x86/kernel/fpu/context.h:49 (discriminator 4) arch/x86/kernel/fpu/context.h:76 (discriminator 4)) [ 15.733378] switch_fpu_return (arch/x86/kernel/fpu/core.c:802) [ 15.733380] syscall_exit_to_user_mode (arch/x86/include/asm/entry-common.h:58 include/linux/entry-common.h:330 kernel/entry/common.c:207 kernel/entry/common.c:218) [ 15.733382] ? rest_init (init/main.c:1459) [ 15.733383] ? kernel_init (init/main.c:1397 init/main.c:1523) [ 15.733385] ? rest_init (init/main.c:1459) [ 15.733387] ret_from_fork (arch/x86/kernel/process.c:154) [ 15.733388] ? rest_init (init/main.c:1459) [ 15.733390] ret_from_fork_asm (arch/x86/entry/entry_32.S:737) [ 15.733391] entry_INT80_32 (arch/x86/entry/entry_32.S:944) [ 15.733393] EIP: 0xb7f175b0 [ 15.733396] Code: Unable to access opcode bytes at 0xb7f17586. Code starting with the faulting instruction =========================================== [ 15.733396] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000 [ 15.733397] ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: bfec49b0 [ 15.733398] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000200 [ 15.733400] ---[ end trace 0000000000000000 ]--- [ 16.074973] ------------[ cut here ]------------ [ 16.079626] WARNING: CPU: 1 PID: 1 at arch/x86/kernel/fpu/xstate.h:195 save_fpregs_to_fpstate (arch/x86/kernel/fpu/xstate.h:195 (discriminator 1) arch/x86/kernel/fpu/core.c:128 (discriminator 1)) [ 16.079629] Modules linked in: [ 16.079630] CPU: 1 PID: 1 Comm: init Tainted: G W 6.10.0-rc3-next-20240612 #1 [ 16.079632] Tainted: [W]=WARN [ 16.079632] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.7 12/07/2021 [ 16.079633] EIP: save_fpregs_to_fpstate (arch/x86/kernel/fpu/xstate.h:195 (discriminator 1) arch/x86/kernel/fpu/core.c:128 (discriminator 1)) [ 16.079634] Code: f8 8b 7d fc 89 ec 5d c3 66 90 8b 40 08 dd 70 40 9b 8b 43 08 dd 60 40 8b 5d f8 8b 7d fc 89 ec 5d c3 2e 8d b4 26 00 00 00 00 90 <0f> 0b eb 9b 8d 74 26 00 0f 0b eb 87 3e 8d 74 26 00 55 89 e5 83 ec All code ======== 0: f8 clc 1: 8b 7d fc mov -0x4(%rbp),%edi 4: 89 ec mov %ebp,%esp 6: 5d pop %rbp 7: c3 retq 8: 66 90 xchg %ax,%ax a: 8b 40 08 mov 0x8(%rax),%eax d: dd 70 40 fnsave 0x40(%rax) 10: 9b fwait 11: 8b 43 08 mov 0x8(%rbx),%eax 14: dd 60 40 frstor 0x40(%rax) 17: 8b 5d f8 mov -0x8(%rbp),%ebx 1a: 8b 7d fc mov -0x4(%rbp),%edi 1d: 89 ec mov %ebp,%esp 1f: 5d pop %rbp 20: c3 retq 21: 2e 8d b4 26 00 00 00 lea %cs:0x0(%rsi,%riz,1),%esi 28: 00 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: eb 9b jmp 0xffffffffffffffc9 2e: 8d 74 26 00 lea 0x0(%rsi,%riz,1),%esi 32: 0f 0b ud2 34: eb 87 jmp 0xffffffffffffffbd 36: 3e 8d 74 26 00 lea %ds:0x0(%rsi,%riz,1),%esi 3b: 55 push %rbp 3c: 89 e5 mov %esp,%ebp 3e: 83 .byte 0x83 3f: ec in (%dx),%al Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: eb 9b jmp 0xffffffffffffff9f 4: 8d 74 26 00 lea 0x0(%rsi,%riz,1),%esi 8: 0f 0b ud2 a: eb 87 jmp 0xffffffffffffff93 c: 3e 8d 74 26 00 lea %ds:0x0(%rsi,%riz,1),%esi 11: 55 push %rbp 12: 89 e5 mov %esp,%ebp 14: 83 .byte 0x83 15: ec in (%dx),%al [ 16.079636] EAX: 0000001f EBX: c12288a0 ECX: c12288e0 EDX: 00000000 [ 16.079637] ESI: c1228000 EDI: fffffff2 EBP: c1221ed0 ESP: c1221ec8 [ 16.079637] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010082 [ 16.079639] CR0: 80050033 CR2: b7f17586 CR3: 02abc000 CR4: 003506d0 [ 16.079640] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 16.079640] DR6: fffe0ff0 DR7: 00000400 [ 16.079641] Call Trace: [ 16.079641] ---[ end trace 0000000000000000 ]--- metadata: --- git_describe: next-20240612 git_ref: master git_rep: ohttps://gitlab.com/Linaro/lkft/mirrors/next/linux-next git_sha: 03d44168cbd7fc57d5de56a3730427db758fc7f6 arch: i386 toolchain: gcc-13 Links: ---- - https://lkft.validation.linaro.org/scheduler/job/7658521#L1067 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240612/testrun/24277698/suite/log-parser-boot/test/check-kernel-warning-ff46c8024e8b2af96107ccfc90c52489f57275260d87c4955245aefd26dd9d60/details/ - https://storage.tuxsuite.com/public/linaro/lkft/builds/2hlo6h03yVTVuYB6mf8ZHEdZISJ/ -- Linaro LKFT https://lkft.linaro.org
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