search for: pt_regs

...------- 2 files changed, 14 insertions(+), 8 deletions(-) diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h index 58d66fe..ca32508 100644 --- a/arch/x86/include/asm/traps.h +++ b/arch/x86/include/asm/traps.h @@ -68,7 +68,7 @@ dotraplinkage void do_segment_not_present(struct pt_regs *, long); dotraplinkage void do_stack_segment(struct pt_regs *, long); #ifdef CONFIG_X86_64 dotraplinkage void do_double_fault(struct pt_regs *, long); -asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *); +asmlinkage struct pt_regs *sync_regs(struct pt_regs *); #endif dotraplinka...

Currently the blacklist is maintained by hand in kprobes.c which is separated from the function definition and is hard to catch up the kernel update. To solve this issue, I've tried to implement new NOKPROBE_SYMBOL() macro for making kprobe blacklist at build time. Since the NOKPROBE_SYMBOL() macros can be placed right after the function is defined, it is easy to maintain. This series

Currently the blacklist is maintained by hand in kprobes.c which is separated from the function definition and is hard to catch up the kernel update. To solve this issue, I've tried to implement new NOKPROBE_SYMBOL() macro for making kprobe blacklist at build time. Since the NOKPROBE_SYMBOL() macros can be placed right after the function is defined, it is easy to maintain. This series

Hi, Here is the version 3 of NOKPORBE_SYMBOL series. Currently the blacklist is maintained by hand in kprobes.c which is separated from the function definition and is hard to catch up the kernel update. To solve this issue, I've introduced NOKPROBE_SYMBOL() macro for making kprobe blacklist at build time. Since the NOKPROBE_SYMBOL() macros can be placed right after the function is defined

Hi, Here is the version 3 of NOKPORBE_SYMBOL series. Currently the blacklist is maintained by hand in kprobes.c which is separated from the function definition and is hard to catch up the kernel update. To solve this issue, I've introduced NOKPROBE_SYMBOL() macro for making kprobe blacklist at build time. Since the NOKPROBE_SYMBOL() macros can be placed right after the function is defined

...00644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -101,6 +101,8 @@ SYM_CODE_START(entry_SYSCALL_64) SWITCH_TO_KERNEL_CR3 scratch_reg=%rsp movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp +SYM_INNER_LABEL(entry_SYSCALL_64_safe_stack, SYM_L_GLOBAL) + /* Construct struct pt_regs on stack */ pushq $__USER_DS /* pt_regs->ss */ pushq PER_CPU_VAR(cpu_tss_rw + TSS_sp2) /* pt_regs->sp */ @@ -446,6 +448,82 @@ _ASM_NOKPROBE(\asmsym) SYM_CODE_END(\asmsym) .endm +/** + * idtentry_vc - Macro to generate entry stub for #VC + * @vector: Vector number + * @asmsym: ASM...

...tentry.h | 12 +++++++++++- 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index af0d57ed5e69..e38e4f34c90c 100644 --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -742,6 +742,13 @@ noinstr void idtentry_exit_nmi(struct pt_regs *regs, bool restore) __nmi_exit(); } +noinstr void idtentry_validate_ist(struct pt_regs *regs) +{ + if ((regs->sp & ~(EXCEPTION_STKSZ-1)) == + (_RET_IP_ & ~(EXCEPTION_STKSZ-1))) + die("IST stack recursion", regs, 0); +} + #ifdef CONFIG_XEN_PV #ifndef CONFIG_PREEMPTI...

On Tue, Jun 23, 2020 at 02:52:01PM +0200, Peter Zijlstra wrote: > On Tue, Jun 23, 2020 at 02:04:33PM +0200, Joerg Roedel wrote: > > No, the recursion check is fine, because overwriting an already used IST > > stack doesn't matter (as long as it can be detected) if we are going to > > panic anyway. It doesn't matter because the kernel will not leave the > >

...; + * will switch to a fall-back stack (VC2) and call a special handler function. > + * > + * The macro is only used for one vector, but it is planned to extend it in the ^^^^^^^^^^^ "... to be extended..." ... > @@ -674,6 +675,56 @@ asmlinkage __visible noinstr struct pt_regs *sync_regs(struct pt_regs *eregs) > return regs; > } > > +#ifdef CONFIG_AMD_MEM_ENCRYPT > +asmlinkage __visible noinstr struct pt_regs *vc_switch_off_ist(struct pt_regs *eregs) > +{ > + unsigned long sp, *stack; > + struct stack_info info; > + struct pt_regs *regs;...

...changed, 48 insertions(+), 22 deletions(-) diff --git a/arch/x86/include/asm/insn-eval.h b/arch/x86/include/asm/insn-eval.h index b8b9ef1bbd06..b4ff3e3316d1 100644 --- a/arch/x86/include/asm/insn-eval.h +++ b/arch/x86/include/asm/insn-eval.h @@ -21,5 +21,7 @@ unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx); int insn_get_code_seg_params(struct pt_regs *regs); int insn_fetch_from_user(struct pt_regs *regs, unsigned char buf[MAX_INSN_SIZE]); +bool insn_decode(struct pt_regs *regs, struct insn *insn, + unsigned char buf[MAX_INSN_SIZE], int buf_size); #endif /* _ASM_X86...

...t has_error_code=1 read_cr2=1 idtentry machine_check do_mce has_error_code=0 paranoid=1 #endif +#ifdef CONFIG_AMD_MEM_ENCRYPT +idtentry vmm_communication do_vmm_communication has_error_code=1 paranoid=1 shift_ist=IST_INDEX_VC ist_offset=VC_STACK_OFFSET +#endif + /* * Save all registers in pt_regs, and switch gs if needed. * Use slow, but surefire "are we in kernel?" check. diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h index 104991c05425..37f6e86ac53a 100644 --- a/arch/x86/include/asm/traps.h +++ b/arch/x86/include/asm/traps.h @@ -35,6 +35,9 @@ asmlinka...

...utronix.de> --- arch/x86/mm/kmmio.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c index 49d7814b59a9b..9994353fb75de 100644 --- a/arch/x86/mm/kmmio.c +++ b/arch/x86/mm/kmmio.c @@ -260,7 +260,7 @@ int kmmio_handler(struct pt_regs *regs, unsigned long addr) goto no_kmmio; } - ctx = &get_cpu_var(kmmio_ctx); + ctx = this_cpu_ptr(&kmmio_ctx); if (ctx->active) { if (page_base == ctx->addr) { /* @@ -285,7 +285,7 @@ int kmmio_handler(struct pt_regs *regs, unsigned long addr) pr_emerg("previou...

.../linux-xen/unaligned.c --- a/xen/arch/ia64/linux-xen/unaligned.c Thu Jan 04 10:58:01 2007 +0000 +++ b/xen/arch/ia64/linux-xen/unaligned.c Fri Jan 05 17:03:31 2007 +1100 @@ -24,7 +24,7 @@ #include <asm/uaccess.h> #include <asm/unaligned.h> -extern void die_if_kernel(char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn)); +extern void die_if_kernel(char *str, struct pt_regs *regs, long err); #undef DEBUG_UNALIGNED_TRAP diff -r 338ceb7b1f09 xen/arch/ia64/xen/xenmisc.c --- a/xen/arch/ia64/xen/xenmisc.c Thu Jan 04 10:58:01 2007 +0000 +++ b/xen/arch/ia64/xen/xenmisc.c Fr...

...d __kprobes long oops_begin(void) +unsigned long oops_begin(void) { int cpu; unsigned long flags; @@ -223,8 +223,9 @@ unsigned __kprobes long oops_begin(void) return flags; } EXPORT_SYMBOL_GPL(oops_begin); +NOKPROBE_SYMBOL(oops_begin); -void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr) +void oops_end(unsigned long flags, struct pt_regs *regs, int signr) { if (regs && kexec_should_crash(current)) crash_kexec(regs); @@ -247,8 +248,9 @@ void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr) panic("Fatal exception");...

On Tue, Jun 23, 2020 at 04:59:14PM +0200, Joerg Roedel wrote: > On Tue, Jun 23, 2020 at 04:53:44PM +0200, Peter Zijlstra wrote: > > +noinstr void idtentry_validate_ist(struct pt_regs *regs) > > +{ > > + if ((regs->sp & ~(EXCEPTION_STKSZ-1)) == > > + (_RET_IP_ & ~(EXCEPTION_STKSZ-1))) > > + die("IST stack recursion", regs, 0); > > +} > > Yes, this is a start, it doesn't cover the case where the NMI stack is >...

This patch removes the __init modifier from an extern function declaration in acpi.h. Besides not being strictly needed, it requires the inclusion of linux/init.h, which is usually not even included directly, increasing header mess by a lot. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> --- include/asm-x86/acpi.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)

This patch removes the __init modifier from an extern function declaration in acpi.h. Besides not being strictly needed, it requires the inclusion of linux/init.h, which is usually not even included directly, increasing header mess by a lot. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> --- include/asm-x86/acpi.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)

...sev-es.h b/arch/x86/include/asm/sev-es.h index 824e9e6b067c..2dd19932a60d 100644 --- a/arch/x86/include/asm/sev-es.h +++ b/arch/x86/include/asm/sev-es.h @@ -77,4 +77,23 @@ static inline u64 lower_bits(u64 val, unsigned int bits) extern void vc_no_ghcb(void); extern bool handle_vc_boot_ghcb(struct pt_regs *regs); +#ifdef CONFIG_AMD_MEM_ENCRYPT +extern struct static_key_false sev_es_enable_key; +extern void __sev_es_ist_enter(struct pt_regs *regs); +extern void __sev_es_ist_exit(void); +static __always_inline void sev_es_ist_enter(struct pt_regs *regs) +{ + if (static_branch_unlikely(&sev_es_en...

...ove_cleanup_interrupt irq_move_cleanup_interrupt #define trace_reboot_interrupt reboot_interrupt #define trace_kvm_posted_intr_ipi kvm_posted_intr_ipi @@ -182,7 +180,6 @@ extern asmlinkage void smp_irq_move_cleanup_interrupt(void); #ifdef CONFIG_SMP extern void smp_reschedule_interrupt(struct pt_regs *); extern void smp_call_function_interrupt(struct pt_regs *); -extern void smp_call_function_single_interrupt(struct pt_regs *); #ifdef CONFIG_X86_32 extern void smp_invalidate_interrupt(struct pt_regs *); #else diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors...

...ove_cleanup_interrupt irq_move_cleanup_interrupt #define trace_reboot_interrupt reboot_interrupt #define trace_kvm_posted_intr_ipi kvm_posted_intr_ipi @@ -182,7 +180,6 @@ extern asmlinkage void smp_irq_move_cleanup_interrupt(void); #ifdef CONFIG_SMP extern void smp_reschedule_interrupt(struct pt_regs *); extern void smp_call_function_interrupt(struct pt_regs *); -extern void smp_call_function_single_interrupt(struct pt_regs *); #ifdef CONFIG_X86_32 extern void smp_invalidate_interrupt(struct pt_regs *); #else diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors...