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Date: Tue, 7 Jul 2015 10:06:31 -0500 From: Josh Poimboeuf <jpoimboe@...hat.com> To: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com> Cc: Michal Marek <mmarek@...e.cz>, Peter Zijlstra <peterz@...radead.org>, Andy Lutomirski <luto@...nel.org>, Borislav Petkov <bp@...en8.de>, Linus Torvalds <torvalds@...ux-foundation.org>, Andi Kleen <andi@...stfloor.org>, Pedro Alves <palves@...hat.com>, x86@...nel.org, live-patching@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v6 0/4] Compile-time stack validation On Tue, Jul 07, 2015 at 09:54:09AM -0500, Josh Poimboeuf wrote: > Also posting a listing of the reported warnings in a reply to this > email. These are the currently reported stackvalidate warnings on tip/master with my Fedora-based config. There were over 1400 warnings, in 37 .c files and 18 .S files. A lot of the repeat warnings have been removed to keep it short. stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_set_key()+0x128: call without frame pointer save/setup ...removed 29 lines... stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_set_key()+0xb9: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_enc()+0xa: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_dec()+0x11: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_ecb_enc()+0x57: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_ecb_enc()+0x27: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_ecb_dec()+0x5f: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_ecb_dec()+0x2f: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_cbc_enc()+0x1b: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_cbc_dec()+0x8a: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_cbc_dec()+0x43: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: _aesni_inc_init(): can't find starting instruction stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_ctr_enc()+0x15: call without frame pointer save/setup ...removed 6 lines... stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_ctr_enc()+0x51: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_xts_crypt8()+0xda: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: aesni_xts_crypt8()+0x1f1: call without frame pointer save/setup stackvalidate: arch/x86/crypto/aesni-intel_asm.o: _aesni_inc_init()+0x24: return instruction outside of a callable function stackvalidate: arch/x86/crypto/ghash-clmulni-intel_asm.o: clmul_ghash_mul()+0x13: call without frame pointer save/setup stackvalidate: arch/x86/crypto/ghash-clmulni-intel_asm.o: clmul_ghash_update()+0x28: call without frame pointer save/setup stackvalidate: arch/x86/crypto/crc32c-pcl-intel-asm_64.o: crc_pcl()+0x11dd: can't decode instruction stackvalidate: arch/x86/entry/entry_64.o: native_usergs_sysret64()+0x3: context switch from callable instruction stackvalidate: arch/x86/entry/entry_64.o: .entry.text+0x329: return instruction outside of a callable function stackvalidate: arch/x86/entry/entry_64.o: .entry.text+0x1fe9: return instruction outside of a callable function stackvalidate: arch/x86/entry/entry_64.o: .entry.text+0x2015: return instruction outside of a callable function stackvalidate: arch/x86/entry/entry_64.o: .entry.text+0x2514: return instruction outside of a callable function stackvalidate: arch/x86/entry/entry_64.o: .entry.text+0x2628: return instruction outside of a callable function stackvalidate: arch/x86/entry/thunk_64.o: .text+0x53: return instruction outside of a callable function stackvalidate: arch/x86/entry/entry_64_compat.o: native_usergs_sysret32()+0x3: context switch from callable instruction stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0xd: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: .entry.text+0x44e: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: .entry.text+0x455: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: .entry.text+0x45a: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: .entry.text+0x45f: jump to outside file from callable instruction stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0xe6: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0x88: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0x8f: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0x10a: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0x110: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: .entry.text+0x47a: jump to outside file from callable instruction stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0x13a: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0x14a: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0x151: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0xcb: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0xd7: jump to dynamic address from callable instruction stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0x179: jump to outside file from callable instruction stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0x7b: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: entry_SYSENTER_compat()+0x1d0: call without frame pointer save/setup stackvalidate: arch/x86/entry/entry_64_compat.o: .entry.text+0x5ce: return instruction outside of a callable function stackvalidate: arch/x86/kernel/mcount_64.o: .entry.text+0x0: return instruction outside of a callable function stackvalidate: arch/x86/kernel/mcount_64.o: .entry.text+0xbb: return instruction outside of a callable function stackvalidate: arch/x86/kernel/mcount_64.o: .entry.text+0x2b7: return instruction outside of a callable function stackvalidate: arch/x86/kernel/alternative.o: hweight_long()+0x1: call without frame pointer save/setup stackvalidate: arch/x86/kernel/tsc.o: unsynchronized_tsc()+0x5f: call without frame pointer save/setup stackvalidate: arch/x86/kernel/process.o: set_tsc_mode()+0x55: call without frame pointer save/setup stackvalidate: arch/x86/kernel/acpi/wakeup_64.o: wakeup_long64()+0x55: jump to dynamic address from callable instruction stackvalidate: arch/x86/kernel/acpi/wakeup_64.o: do_suspend_lowlevel()+0x6: call without frame pointer save/setup stackvalidate: arch/x86/kernel/acpi/wakeup_64.o: do_suspend_lowlevel()+0x95: call without frame pointer save/setup stackvalidate: arch/x86/kernel/acpi/wakeup_64.o: do_suspend_lowlevel()+0x116: jump to outside file from callable instruction stackvalidate: arch/x86/kernel/apic/apic.o: hweight_long()+0x1: call without frame pointer save/setup stackvalidate: arch/x86/kernel/cpu/common.o: debug_stack_reset()+0x70: call without frame pointer save/setup stackvalidate: arch/x86/kernel/cpu/common.o: debug_stack_reset()+0x61: call without frame pointer save/setup stackvalidate: arch/x86/kernel/cpu/common.o: debug_stack_reset()+0x31: call without frame pointer save/setup stackvalidate: arch/x86/kernel/cpu/amd.o: .text+0x0: return instruction outside of a callable function stackvalidate: arch/x86/kernel/cpu/perf_event_intel.o: __arch_hweight64()+0x1: call without frame pointer save/setup stackvalidate: arch/x86/kernel/cpu/mcheck/mce.o: mce_wrmsrl.constprop.30()+0x3f: call without frame pointer save/setup stackvalidate: arch/x86/kernel/kprobes/core.o: kretprobe_trampoline_holder()+0x1d: duplicate frame pointer save stackvalidate: arch/x86/kernel/kprobes/core.o: kprobe_exceptions_notify()+0x2d: call without frame pointer save/setup stackvalidate: arch/x86/kernel/kprobes/core.o: kretprobe_trampoline_holder()+0x53: function has unreachable instruction stackvalidate: arch/x86/kernel/kprobes/core.o: kretprobe_trampoline_holder()+0x54: function has unreachable instruction stackvalidate: arch/x86/kernel/reboot.o: machine_real_restart()+0x5d: jump to dynamic address from callable instruction stackvalidate: arch/x86/kernel/relocate_kernel_64.o: .text+0xd6: can't find call dest symbol at offset 0xdb stackvalidate: arch/x86/kernel/paravirt.o: paravirt_end_context_switch()+0x3f: call without frame pointer save/setup stackvalidate: arch/x86/kernel/paravirt.o: paravirt_end_context_switch()+0x37: call without frame pointer save/setup stackvalidate: arch/x86/kernel/vsmp_64.o: .text+0x1d: return instruction outside of a callable function stackvalidate: arch/x86/kernel/vsmp_64.o: .text+0x3b: return instruction outside of a callable function stackvalidate: arch/x86/kernel/vsmp_64.o: .text+0x59: return instruction outside of a callable function stackvalidate: arch/x86/kernel/vsmp_64.o: .text+0x77: return instruction outside of a callable function stackvalidate: arch/x86/kernel/head_64.o: .text: unexpected end of section stackvalidate: arch/x86/kernel/head_64.o: start_cpu0()+0x13: context switch from callable instruction stackvalidate: arch/x86/kernel/head_64.o: early_idt_handler_common()+0xbb: jump to dynamic address from callable instruction ...removed 6 lines... stackvalidate: arch/x86/kernel/head_64.o: early_idt_handler_common()+0x42: call without frame pointer save/setup stackvalidate: arch/x86/kernel/head_64.o: early_idt_handler_array()+0x9: function has unreachable instruction ...removed 140 lines... stackvalidate: arch/x86/kernel/head_64.o: early_idt_handler_array()+0x11f: function has unreachable instruction stackvalidate: arch/x86/mm/tlb.o: leave_mm()+0x5c: call without frame pointer save/setup stackvalidate: arch/x86/mm/tlb.o: do_flush_tlb_all()+0x25: call without frame pointer save/setup stackvalidate: arch/x86/mm/tlb.o: do_flush_tlb_all()+0x11: call without frame pointer save/setup stackvalidate: arch/x86/mm/mmio-mod.o: hweight_long()+0x1: call without frame pointer save/setup stackvalidate: arch/x86/net/bpf_jit.o: .text+0x18: return instruction outside of a callable function ...removed 7 lines... stackvalidate: arch/x86/net/bpf_jit.o: .text+0x16d: return instruction outside of a callable function stackvalidate: arch/x86/platform/efi/efi_stub_64.o: efi_call()+0x7c: call without frame pointer save/setup stackvalidate: arch/x86/platform/uv/tlb_uv.o: ptc_seq_next()+0x1e: call without frame pointer save/setup stackvalidate: arch/x86/platform/uv/uv_nmi.o: hweight_long()+0x1: call without frame pointer save/setup stackvalidate: arch/x86/platform/uv/uv_nmi.o: bitmap_weight.constprop.9()+0x4: call without frame pointer save/setup stackvalidate: arch/x86/xen/enlighten.o: xen_cpuid()+0x41: can't find jump dest instruction at .text+0x108 stackvalidate: arch/x86/xen/mmu.o: .text+0x1d: return instruction outside of a callable function ...removed 6 lines... stackvalidate: arch/x86/xen/mmu.o: .text+0xef: return instruction outside of a callable function stackvalidate: arch/x86/xen/irq.o: xen_halt()+0x0: call without frame pointer save/setup stackvalidate: arch/x86/xen/irq.o: xen_halt()+0x1d: call without frame pointer save/setup stackvalidate: arch/x86/xen/irq.o: .text+0x1d: return instruction outside of a callable function stackvalidate: arch/x86/xen/irq.o: .text+0x3b: return instruction outside of a callable function stackvalidate: arch/x86/xen/irq.o: .text+0x59: return instruction outside of a callable function stackvalidate: arch/x86/xen/irq.o: .text+0x77: return instruction outside of a callable function stackvalidate: arch/x86/xen/time.o: xen_vcpuop_set_mode()+0x36: call without frame pointer save/setup stackvalidate: arch/x86/xen/time.o: xen_vcpuop_set_mode()+0x49: call without frame pointer save/setup stackvalidate: arch/x86/xen/time.o: xen_vcpuop_set_mode()+0x1d: call without frame pointer save/setup stackvalidate: arch/x86/xen/time.o: xen_timerop_set_mode()+0x26: call without frame pointer save/setup stackvalidate: arch/x86/xen/xen-asm.o: .text+0x7f: return instruction outside of a callable function stackvalidate: arch/x86/xen/xen-asm_64.o: xen_syscall_target()+0xe: jump to outside file from callable instruction stackvalidate: arch/x86/xen/xen-asm_64.o: xen_syscall32_target()+0xe: jump to outside file from callable instruction stackvalidate: arch/x86/xen/xen-asm_64.o: xen_sysenter_target()+0xe: jump to outside file from callable instruction stackvalidate: arch/x86/xen/xen-asm_64.o: .text+0xa: return instruction outside of a callable function stackvalidate: arch/x86/xen/smp.o: hweight_long()+0x1: call without frame pointer save/setup stackvalidate: kernel/softirq.o: __tasklet_hi_schedule_first()+0x5: call without frame pointer save/setup stackvalidate: kernel/pid.o: hweight_long()+0x1: call without frame pointer save/setup stackvalidate: kernel/bpf/core.o: __bpf_prog_run()+0x5c: jump to dynamic address from callable instruction stackvalidate: kernel/bpf/core.o: __bpf_prog_run()+0x60: function has unreachable instruction ...removed 1092 lines... stackvalidate: kernel/bpf/core.o: __bpf_prog_run()+0x12dc: function has unreachable instruction stackvalidate: kernel/locking/lockdep.o: trace_hardirqs_off_caller()+0x31: call without frame pointer save/setup stackvalidate: kernel/printk/printk.o: hweight_long()+0x1: call without frame pointer save/setup stackvalidate: kernel/sched/core.o: sd_degenerate()+0x10: call without frame pointer save/setup stackvalidate: kernel/sched/core.o: __schedule()+0x3d8: duplicate frame pointer save stackvalidate: kernel/sched/core.o: __schedule()+0x415: jump to outside file from callable instruction stackvalidate: kernel/sched/core.o: __schedule()+0x422: call without frame pointer save/setup stackvalidate: kernel/sched/core.o: __schedule()+0x42a: frame pointer state mismatch stackvalidate: kernel/sched/core.o: preempt_schedule_irq()+0x17: call without frame pointer save/setup stackvalidate: kernel/sched/rt.o: set_cpus_allowed_rt()+0x1b: call without frame pointer save/setup stackvalidate: kernel/irq_work.o: irq_work_run_list()+0x0: call without frame pointer save/setup stackvalidate: mm/percpu.o: hweight_long()+0x1: call without frame pointer save/setup stackvalidate: mm/slub.o: check_slab()+0x5: call without frame pointer save/setup stackvalidate: mm/huge_memory.o: split_huge_page_address()+0x30: call without frame pointer save/setup stackvalidate: mm/huge_memory.o: split_huge_page_address()+0x6d: call without frame pointer save/setup stackvalidate: fs/buffer.o: __find_get_block()+0x5: call without frame pointer save/setup stackvalidate: drivers/acpi/processor_idle.o: hweight_long()+0x1: call without frame pointer save/setup stackvalidate: drivers/usb/host/xhci.o: xhci_count_num_new_endpoints.isra.23()+0x10: call without frame pointer save/setup stackvalidate: drivers/xen/sys-hypervisor.o: pagesize_show()+0xf: call without frame pointer save/setup stackvalidate: drivers/xen/sys-hypervisor.o: minor_show()+0xc: call without frame pointer save/setup stackvalidate: drivers/xen/sys-hypervisor.o: major_show()+0xc: call without frame pointer save/setup stackvalidate: arch/x86/power/hibernate_asm_64.o: .text+0x69: return instruction outside of a callable function stackvalidate: arch/x86/power/hibernate_asm_64.o: .text+0x16d: return instruction outside of a callable function stackvalidate: lib/percpu_counter.o: __percpu_counter_compare()+0x1e: call without frame pointer save/setup stackvalidate: arch/x86/lib/msr-reg.o: rdmsr_safe_regs()+0x3c: frame pointer restore without save/setup stackvalidate: arch/x86/lib/msr-reg.o: wrmsr_safe_regs()+0x3c: frame pointer restore without save/setup stackvalidate: arch/x86/lib/copy_user_64.o: .fixup+0x2f: jump to outside file from callable instruction ...removed 5 lines... stackvalidate: arch/x86/lib/copy_user_64.o: .fixup+0x3d: jump to outside file from callable instruction stackvalidate: arch/x86/lib/rwsem.o: call_rwsem_down_read_failed()+0xf: call without frame pointer save/setup stackvalidate: arch/x86/lib/rwsem.o: call_rwsem_down_write_failed()+0xe: call without frame pointer save/setup stackvalidate: arch/x86/lib/rwsem.o: call_rwsem_wake()+0x12: call without frame pointer save/setup stackvalidate: arch/x86/lib/rwsem.o: call_rwsem_downgrade_wake()+0xf: call without frame pointer save/setup -- Josh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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