Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "A few fixes from the perf departement

   - prevent a imbalanced preemption disable in the events teardown code
   - prevent out of bound acces in perf userspace
   - make perf tools compile with UCLIBC again
   - a fix for the userspace unwinder utility"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Use this_cpu_ptr() when stopping AUX events
  perf evsel: Do not access outside hw cache name arrays
  tools lib: Reinstate strlcpy() header guard with __UCLIBC__
  perf unwind: Use addr_location::addr instead of ip for entries

4 files changed, 10 insertions, 6 deletions

diff --git a/tools/include/linux/string.h b/tools/include/linux/string.h
index b968794773116..f436d2420a185 100644
--- a/tools/include/linux/string.h
+++ b/tools/include/linux/string.h
@@ -8,7 +8,11 @@ void *memdup(const void *src, size_t len);
 
 int strtobool(const char *s, bool *res);
 
-#ifdef __GLIBC__
+/*
+ * glibc based builds needs the extern while uClibc doesn't.
+ * However uClibc headers also define __GLIBC__ hence the hack below
+ */
+#if defined(__GLIBC__) && !defined(__UCLIBC__)
 extern size_t strlcpy(char *dest, const char *src, size_t size);
 #endif
 
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index d9b80ef881cde..21fd573106edd 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -507,17 +507,17 @@ static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
 	u8 op, result, type = (config >>  0) & 0xff;
 	const char *err = "unknown-ext-hardware-cache-type";
 
-	if (type > PERF_COUNT_HW_CACHE_MAX)
+	if (type >= PERF_COUNT_HW_CACHE_MAX)
 		goto out_err;
 
 	op = (config >>  8) & 0xff;
 	err = "unknown-ext-hardware-cache-op";
-	if (op > PERF_COUNT_HW_CACHE_OP_MAX)
+	if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
 		goto out_err;
 
 	result = (config >> 16) & 0xff;
 	err = "unknown-ext-hardware-cache-result";
-	if (result > PERF_COUNT_HW_CACHE_RESULT_MAX)
+	if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
 		goto out_err;
 
 	err = "invalid-cache";
diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c
index cf5e250bc78e1..783a53fb7a4ed 100644
--- a/tools/perf/util/unwind-libdw.c
+++ b/tools/perf/util/unwind-libdw.c
@@ -66,7 +66,7 @@ static int entry(u64 ip, struct unwind_info *ui)
 	if (__report_module(&al, ip, ui))
 		return -1;
 
-	e->ip  = ip;
+	e->ip  = al.addr;
 	e->map = al.map;
 	e->sym = al.sym;
 
diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
index 97c0f8fc55615..20c2e57439038 100644
--- a/tools/perf/util/unwind-libunwind-local.c
+++ b/tools/perf/util/unwind-libunwind-local.c
@@ -542,7 +542,7 @@ static int entry(u64 ip, struct thread *thread,
 	thread__find_addr_location(thread, PERF_RECORD_MISC_USER,
 				   MAP__FUNCTION, ip, &al);
 
-	e.ip = ip;
+	e.ip = al.addr;
 	e.map = al.map;
 	e.sym = al.sym;