Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar: "Four tooling fixes, two kprobes KASAN related fixes and an x86 PMU driver fix/cleanup" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf jit: Fix build issue on Ubuntu perf jevents: Handle events including .c and .o perf/x86/intel: Remove an inconsistent NULL check kprobes: Unpoison stack in jprobe_return() for KASAN kprobes: Avoid false KASAN reports during stack copy perf header: Set nr_numa_nodes only when we parsed all the data perf top: Fix refreshing hierarchy entries on TUI
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commit
b75d3886f3
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@ -135,7 +135,7 @@ ENTRY(_cpu_resume)
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#ifdef CONFIG_KASAN
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mov x0, sp
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bl kasan_unpoison_remaining_stack
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bl kasan_unpoison_task_stack_below
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#endif
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ldp x19, x20, [x29, #16]
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@ -458,7 +458,7 @@ void intel_pmu_lbr_del(struct perf_event *event)
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if (!x86_pmu.lbr_nr)
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return;
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if (branch_user_callstack(cpuc->br_sel) && event->ctx &&
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if (branch_user_callstack(cpuc->br_sel) &&
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event->ctx->task_ctx_data) {
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task_ctx = event->ctx->task_ctx_data;
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task_ctx->lbr_callstack_users--;
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@ -50,6 +50,7 @@
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#include <linux/kallsyms.h>
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#include <linux/ftrace.h>
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#include <linux/frame.h>
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#include <linux/kasan.h>
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#include <asm/text-patching.h>
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#include <asm/cacheflush.h>
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@ -1057,9 +1058,10 @@ int setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
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* tailcall optimization. So, to be absolutely safe
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* we also save and restore enough stack bytes to cover
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* the argument area.
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* Use __memcpy() to avoid KASAN stack out-of-bounds reports as we copy
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* raw stack chunk with redzones:
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*/
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memcpy(kcb->jprobes_stack, (kprobe_opcode_t *)addr,
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MIN_STACK_SIZE(addr));
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__memcpy(kcb->jprobes_stack, (kprobe_opcode_t *)addr, MIN_STACK_SIZE(addr));
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regs->flags &= ~X86_EFLAGS_IF;
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trace_hardirqs_off();
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regs->ip = (unsigned long)(jp->entry);
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@ -1080,6 +1082,9 @@ void jprobe_return(void)
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{
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struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
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/* Unpoison stack redzones in the frames we are going to jump over. */
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kasan_unpoison_stack_above_sp_to(kcb->jprobe_saved_sp);
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asm volatile (
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#ifdef CONFIG_X86_64
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" xchg %%rbx,%%rsp \n"
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@ -1118,7 +1123,7 @@ int longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
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/* It's OK to start function graph tracing again */
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unpause_graph_tracing();
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*regs = kcb->jprobe_saved_regs;
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memcpy(saved_sp, kcb->jprobes_stack, MIN_STACK_SIZE(saved_sp));
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__memcpy(saved_sp, kcb->jprobes_stack, MIN_STACK_SIZE(saved_sp));
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preempt_enable_no_resched();
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return 1;
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}
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@ -44,6 +44,7 @@ static inline void kasan_disable_current(void)
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void kasan_unpoison_shadow(const void *address, size_t size);
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void kasan_unpoison_task_stack(struct task_struct *task);
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void kasan_unpoison_stack_above_sp_to(const void *watermark);
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void kasan_alloc_pages(struct page *page, unsigned int order);
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void kasan_free_pages(struct page *page, unsigned int order);
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@ -85,6 +86,7 @@ size_t kasan_metadata_size(struct kmem_cache *cache);
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static inline void kasan_unpoison_shadow(const void *address, size_t size) {}
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static inline void kasan_unpoison_task_stack(struct task_struct *task) {}
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static inline void kasan_unpoison_stack_above_sp_to(const void *watermark) {}
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static inline void kasan_enable_current(void) {}
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static inline void kasan_disable_current(void) {}
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@ -34,6 +34,7 @@
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/vmalloc.h>
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#include <linux/bug.h>
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#include "kasan.h"
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#include "../slab.h"
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@ -62,7 +63,7 @@ void kasan_unpoison_shadow(const void *address, size_t size)
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}
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}
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static void __kasan_unpoison_stack(struct task_struct *task, void *sp)
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static void __kasan_unpoison_stack(struct task_struct *task, const void *sp)
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{
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void *base = task_stack_page(task);
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size_t size = sp - base;
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@ -77,9 +78,24 @@ void kasan_unpoison_task_stack(struct task_struct *task)
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}
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/* Unpoison the stack for the current task beyond a watermark sp value. */
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asmlinkage void kasan_unpoison_remaining_stack(void *sp)
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asmlinkage void kasan_unpoison_task_stack_below(const void *watermark)
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{
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__kasan_unpoison_stack(current, sp);
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__kasan_unpoison_stack(current, watermark);
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}
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/*
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* Clear all poison for the region between the current SP and a provided
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* watermark value, as is sometimes required prior to hand-crafted asm function
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* returns in the middle of functions.
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*/
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void kasan_unpoison_stack_above_sp_to(const void *watermark)
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{
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const void *sp = __builtin_frame_address(0);
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size_t size = watermark - sp;
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if (WARN_ON(sp > watermark))
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return;
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kasan_unpoison_shadow(sp, size);
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}
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/*
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@ -36,7 +36,7 @@ SOLIBEXT=so
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# The following works at least on fedora 23, you may need the next
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# line for other distros.
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ifneq (,$(wildcard /usr/sbin/update-java-alternatives))
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JDIR=$(shell /usr/sbin/update-java-alternatives -l | head -1 | cut -d ' ' -f 3)
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JDIR=$(shell /usr/sbin/update-java-alternatives -l | head -1 | awk '{print $$3}')
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else
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ifneq (,$(wildcard /usr/sbin/alternatives))
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JDIR=$(shell alternatives --display java | tail -1 | cut -d' ' -f 5 | sed 's%/jre/bin/java.%%g')
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@ -601,7 +601,8 @@ int hist_browser__run(struct hist_browser *browser, const char *help)
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u64 nr_entries;
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hbt->timer(hbt->arg);
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if (hist_browser__has_filter(browser))
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if (hist_browser__has_filter(browser) ||
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symbol_conf.report_hierarchy)
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hist_browser__update_nr_entries(browser);
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nr_entries = hist_browser__nr_entries(browser);
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@ -1895,7 +1895,6 @@ static int process_numa_topology(struct perf_file_section *section __maybe_unuse
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if (ph->needs_swap)
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nr = bswap_32(nr);
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ph->env.nr_numa_nodes = nr;
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nodes = zalloc(sizeof(*nodes) * nr);
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if (!nodes)
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return -ENOMEM;
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@ -1932,6 +1931,7 @@ static int process_numa_topology(struct perf_file_section *section __maybe_unuse
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free(str);
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}
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ph->env.nr_numa_nodes = nr;
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ph->env.numa_nodes = nodes;
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return 0;
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@ -136,8 +136,8 @@ do { \
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group [^,{}/]*[{][^}]*[}][^,{}/]*
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event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*
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event [^,{}/]+
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bpf_object .*\.(o|bpf)
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bpf_source .*\.c
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bpf_object [^,{}]+\.(o|bpf)
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bpf_source [^,{}]+\.c
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num_dec [0-9]+
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num_hex 0x[a-fA-F0-9]+
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