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

Pull perf fixes from Ingo Molnar:
 "A number of PMU driver corner case fixes, a race fix, an event
  grouping fix, plus a bunch of tooling fixes/updates"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
  perf/x86/intel: Fix spurious NMI on fixed counter
  perf/core: Fix exclusive events' grouping
  perf/x86/amd/uncore: Set the thread mask for F17h L3 PMCs
  perf/x86/amd/uncore: Do not set 'ThreadMask' and 'SliceMask' for non-L3 PMCs
  perf/core: Fix race between close() and fork()
  perf intel-pt: Fix potential NULL pointer dereference found by the smatch tool
  perf intel-bts: Fix potential NULL pointer dereference found by the smatch tool
  perf script: Assume native_arch for pipe mode
  perf scripts python: export-to-sqlite.py: Fix DROP VIEW power_events_view
  perf scripts python: export-to-postgresql.py: Fix DROP VIEW power_events_view
  perf hists browser: Fix potential NULL pointer dereference found by the smatch tool
  perf cs-etm: Fix potential NULL pointer dereference found by the smatch tool
  perf parse-events: Remove unused variable: error
  perf parse-events: Remove unused variable 'i'
  perf metricgroup: Add missing list_del_init() when flushing egroups list
  perf tools: Use list_del_init() more thorougly
  perf tools: Use zfree() where applicable
  tools lib: Adopt zalloc()/zfree() from tools/perf
  perf tools: Move get_current_dir_name() cond prototype out of util.h
  perf namespaces: Move the conditional setns() prototype to namespaces.h
  ...

arch/x86/events/amd/uncore.c

@@ -202,15 +202,22 @@ static int amd_uncore_event_init(struct perf_event *event)
 	hwc->config = event->attr.config & AMD64_RAW_EVENT_MASK_NB;
 	hwc->idx = -1;
 
+	if (event->cpu < 0)
+		return -EINVAL;
+
 	/*
 	 * SliceMask and ThreadMask need to be set for certain L3 events in
 	 * Family 17h. For other events, the two fields do not affect the count.
 	 */
-	if (l3_mask)
-		hwc->config |= (AMD64_L3_SLICE_MASK | AMD64_L3_THREAD_MASK);
+	if (l3_mask && is_llc_event(event)) {
+		int thread = 2 * (cpu_data(event->cpu).cpu_core_id % 4);
 
-	if (event->cpu < 0)
-		return -EINVAL;
+		if (smp_num_siblings > 1)
+			thread += cpu_data(event->cpu).apicid & 1;
+
+		hwc->config |= (1ULL << (AMD64_L3_THREAD_SHIFT + thread) &
+				AMD64_L3_THREAD_MASK) | AMD64_L3_SLICE_MASK;
+	}
 
 	uncore = event_to_amd_uncore(event);
 	if (!uncore)

arch/x86/events/intel/core.c

@@ -2161,12 +2161,10 @@ static void intel_pmu_disable_event(struct perf_event *event)
 	cpuc->intel_ctrl_host_mask &= ~(1ull << hwc->idx);
 	cpuc->intel_cp_status &= ~(1ull << hwc->idx);
 
-	if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
+	if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL))
 		intel_pmu_disable_fixed(hwc);
-		return;
-	}
-
-	x86_pmu_disable_event(event);
+	else
+		x86_pmu_disable_event(event);
 
 	/*
 	 * Needs to be called after x86_pmu_disable_event,

include/linux/perf_event.h

@@ -1055,6 +1055,11 @@ static inline int in_software_context(struct perf_event *event)
 	return event->ctx->pmu->task_ctx_nr == perf_sw_context;
 }
 
+static inline int is_exclusive_pmu(struct pmu *pmu)
+{
+	return pmu->capabilities & PERF_PMU_CAP_EXCLUSIVE;
+}
+
 extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX];
 
 extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64);

kernel/events/core.c

@@ -2553,6 +2553,9 @@ unlock:
 	return ret;
 }
 
+static bool exclusive_event_installable(struct perf_event *event,
+					struct perf_event_context *ctx);
+
 /*
  * Attach a performance event to a context.
  *
@@ -2567,6 +2570,8 @@ perf_install_in_context(struct perf_event_context *ctx,
 
 	lockdep_assert_held(&ctx->mutex);
 
+	WARN_ON_ONCE(!exclusive_event_installable(event, ctx));
+
 	if (event->cpu != -1)
 		event->cpu = cpu;
 
@@ -4360,7 +4365,7 @@ static int exclusive_event_init(struct perf_event *event)
 {
 	struct pmu *pmu = event->pmu;
 
-	if (!(pmu->capabilities & PERF_PMU_CAP_EXCLUSIVE))
+	if (!is_exclusive_pmu(pmu))
 		return 0;
 
 	/*
@@ -4391,7 +4396,7 @@ static void exclusive_event_destroy(struct perf_event *event)
 {
 	struct pmu *pmu = event->pmu;
 
-	if (!(pmu->capabilities & PERF_PMU_CAP_EXCLUSIVE))
+	if (!is_exclusive_pmu(pmu))
 		return;
 
 	/* see comment in exclusive_event_init() */
@@ -4411,14 +4416,15 @@ static bool exclusive_event_match(struct perf_event *e1, struct perf_event *e2)
 	return false;
 }
 
-/* Called under the same ctx::mutex as perf_install_in_context() */
 static bool exclusive_event_installable(struct perf_event *event,
 					struct perf_event_context *ctx)
 {
 	struct perf_event *iter_event;
 	struct pmu *pmu = event->pmu;
 
-	if (!(pmu->capabilities & PERF_PMU_CAP_EXCLUSIVE))
+	lockdep_assert_held(&ctx->mutex);
+
+	if (!is_exclusive_pmu(pmu))
 		return true;
 
 	list_for_each_entry(iter_event, &ctx->event_list, event_entry) {
@@ -4465,12 +4471,20 @@ static void _free_event(struct perf_event *event)
 	if (event->destroy)
 		event->destroy(event);
 
-	if (event->ctx)
-		put_ctx(event->ctx);
-
+	/*
+	 * Must be after ->destroy(), due to uprobe_perf_close() using
+	 * hw.target.
+	 */
 	if (event->hw.target)
 		put_task_struct(event->hw.target);
 
+	/*
+	 * perf_event_free_task() relies on put_ctx() being 'last', in particular
+	 * all task references must be cleaned up.
+	 */
+	if (event->ctx)
+		put_ctx(event->ctx);
+
 	exclusive_event_destroy(event);
 	module_put(event->pmu->module);
 
@@ -4650,8 +4664,17 @@ again:
 	mutex_unlock(&event->child_mutex);
 
 	list_for_each_entry_safe(child, tmp, &free_list, child_list) {
+		void *var = &child->ctx->refcount;
+
 		list_del(&child->child_list);
 		free_event(child);
+
+		/*
+		 * Wake any perf_event_free_task() waiting for this event to be
+		 * freed.
+		 */
+		smp_mb(); /* pairs with wait_var_event() */
+		wake_up_var(var);
 	}
 
 no_ctx:
@@ -10930,11 +10953,6 @@ SYSCALL_DEFINE5(perf_event_open,
 		goto err_alloc;
 	}
 
-	if ((pmu->capabilities & PERF_PMU_CAP_EXCLUSIVE) && group_leader) {
-		err = -EBUSY;
-		goto err_context;
-	}
-
 	/*
 	 * Look up the group leader (we will attach this event to it):
 	 */
@@ -11022,6 +11040,18 @@ SYSCALL_DEFINE5(perf_event_open,
 				move_group = 0;
 			}
 		}
+
+		/*
+		 * Failure to create exclusive events returns -EBUSY.
+		 */
+		err = -EBUSY;
+		if (!exclusive_event_installable(group_leader, ctx))
+			goto err_locked;
+
+		for_each_sibling_event(sibling, group_leader) {
+			if (!exclusive_event_installable(sibling, ctx))
+				goto err_locked;
+		}
 	} else {
 		mutex_lock(&ctx->mutex);
 	}
@@ -11058,9 +11088,6 @@ SYSCALL_DEFINE5(perf_event_open,
 	 * because we need to serialize with concurrent event creation.
 	 */
 	if (!exclusive_event_installable(event, ctx)) {
-		/* exclusive and group stuff are assumed mutually exclusive */
-		WARN_ON_ONCE(move_group);
-
 		err = -EBUSY;
 		goto err_locked;
 	}
@@ -11527,11 +11554,11 @@ static void perf_free_event(struct perf_event *event,
 }
 
 /*
- * Free an unexposed, unused context as created by inheritance by
- * perf_event_init_task below, used by fork() in case of fail.
+ * Free a context as created by inheritance by perf_event_init_task() below,
+ * used by fork() in case of fail.
  *
- * Not all locks are strictly required, but take them anyway to be nice and
- * help out with the lockdep assertions.
+ * Even though the task has never lived, the context and events have been
+ * exposed through the child_list, so we must take care tearing it all down.
  */
 void perf_event_free_task(struct task_struct *task)
 {
@@ -11561,7 +11588,23 @@ void perf_event_free_task(struct task_struct *task)
 			perf_free_event(event, ctx);
 
 		mutex_unlock(&ctx->mutex);
-		put_ctx(ctx);
+
+		/*
+		 * perf_event_release_kernel() could've stolen some of our
+		 * child events and still have them on its free_list. In that
+		 * case we must wait for these events to have been freed (in
+		 * particular all their references to this task must've been
+		 * dropped).
+		 *
+		 * Without this copy_process() will unconditionally free this
+		 * task (irrespective of its reference count) and
+		 * _free_event()'s put_task_struct(event->hw.target) will be a
+		 * use-after-free.
+		 *
+		 * Wait for all events to drop their context reference.
+		 */
+		wait_var_event(&ctx->refcount, refcount_read(&ctx->refcount) == 1);
+		put_ctx(ctx); /* must be last */
 	}
 }
 

tools/include/linux/zalloc.h

@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: LGPL-2.1
+#ifndef __TOOLS_LINUX_ZALLOC_H
+#define __TOOLS_LINUX_ZALLOC_H
+
+#include <stddef.h>
+
+void *zalloc(size_t size);
+void __zfree(void **ptr);
+
+#define zfree(ptr) __zfree((void **)(ptr))
+
+#endif // __TOOLS_LINUX_ZALLOC_H

tools/lib/zalloc.c

@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: LGPL-2.1
+
+#include <stdlib.h>
+#include <linux/zalloc.h>
+
+void *zalloc(size_t size)
+{
+	return calloc(1, size);
+}
+
+void __zfree(void **ptr)
+{
+	free(*ptr);
+	*ptr = NULL;
+}

tools/perf/MANIFEST

@@ -18,3 +18,4 @@ tools/lib/find_bit.c
 tools/lib/bitmap.c
 tools/lib/str_error_r.c
 tools/lib/vsprintf.c
+tools/lib/zalloc.c

tools/perf/arch/arm/annotate/instructions.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
+#include <linux/zalloc.h>
 #include <sys/types.h>
 #include <regex.h>
 

tools/perf/arch/arm/util/auxtrace.c

@@ -6,6 +6,7 @@
 
 #include <stdbool.h>
 #include <linux/coresight-pmu.h>
+#include <linux/zalloc.h>
 
 #include "../../util/auxtrace.h"
 #include "../../util/evlist.h"

tools/perf/arch/arm/util/cs-etm.c

@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/log2.h>
 #include <linux/types.h>
+#include <linux/zalloc.h>
 
 #include "cs-etm.h"
 #include "../../perf.h"

tools/perf/arch/arm64/util/arm-spe.c

@@ -8,6 +8,7 @@
 #include <linux/types.h>
 #include <linux/bitops.h>
 #include <linux/log2.h>
+#include <linux/zalloc.h>
 #include <time.h>
 
 #include "../../util/cpumap.h"

tools/perf/arch/common.c

@@ -1,9 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
+#include <stdlib.h>
 #include "common.h"
 #include "../util/env.h"
-#include "../util/util.h"
 #include "../util/debug.h"
+#include <linux/zalloc.h>
 
 const char *const arc_triplets[] = {
 	"arc-linux-",

tools/perf/arch/powerpc/util/perf_regs.c

@@ -2,12 +2,14 @@
 #include <errno.h>
 #include <string.h>
 #include <regex.h>
+#include <linux/zalloc.h>
 
 #include "../../perf.h"
-#include "../../util/util.h"
 #include "../../util/perf_regs.h"
 #include "../../util/debug.h"
 
+#include <linux/kernel.h>
+
 const struct sample_reg sample_reg_masks[] = {
 	SMPL_REG(r0, PERF_REG_POWERPC_R0),
 	SMPL_REG(r1, PERF_REG_POWERPC_R1),

tools/perf/arch/s390/util/auxtrace.c

@@ -3,6 +3,7 @@
 #include <linux/types.h>
 #include <linux/bitops.h>
 #include <linux/log2.h>
+#include <linux/zalloc.h>
 
 #include "../../util/evlist.h"
 #include "../../util/auxtrace.h"

tools/perf/arch/s390/util/header.c

@@ -12,9 +12,10 @@
 #include <stdio.h>
 #include <string.h>
 #include <linux/ctype.h>
+#include <linux/kernel.h>
+#include <linux/zalloc.h>
 
 #include "../../util/header.h"
-#include "../../util/util.h"
 
 #define SYSINFO_MANU	"Manufacturer:"
 #define SYSINFO_TYPE	"Type:"

tools/perf/arch/x86/util/event.c

@@ -1,11 +1,11 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/types.h>
 #include <linux/string.h>
+#include <linux/zalloc.h>
 
 #include "../../util/machine.h"
 #include "../../util/tool.h"
 #include "../../util/map.h"
-#include "../../util/util.h"
 #include "../../util/debug.h"
 
 #if defined(__x86_64__)

tools/perf/arch/x86/util/intel-bts.c

@@ -9,12 +9,12 @@
 #include <linux/types.h>
 #include <linux/bitops.h>
 #include <linux/log2.h>
+#include <linux/zalloc.h>
 
 #include "../../util/cpumap.h"
 #include "../../util/evsel.h"
 #include "../../util/evlist.h"
 #include "../../util/session.h"
-#include "../../util/util.h"
 #include "../../util/pmu.h"
 #include "../../util/debug.h"
 #include "../../util/tsc.h"

tools/perf/arch/x86/util/intel-pt.c

@@ -10,6 +10,7 @@
 #include <linux/types.h>
 #include <linux/bitops.h>
 #include <linux/log2.h>
+#include <linux/zalloc.h>
 #include <cpuid.h>
 
 #include "../../perf.h"
@@ -25,7 +26,6 @@
 #include "../../util/auxtrace.h"
 #include "../../util/tsc.h"
 #include "../../util/intel-pt.h"
-#include "../../util/util.h"
 
 #define KiB(x) ((x) * 1024)
 #define MiB(x) ((x) * 1024 * 1024)

tools/perf/arch/x86/util/perf_regs.c

@@ -2,9 +2,9 @@
 #include <errno.h>
 #include <string.h>
 #include <regex.h>
+#include <linux/zalloc.h>
 
 #include "../../perf.h"
-#include "../../util/util.h"
 #include "../../util/perf_regs.h"
 #include "../../util/debug.h"
 

tools/perf/bench/futex-hash.c

@@ -18,6 +18,7 @@
 #include <stdlib.h>
 #include <linux/compiler.h>
 #include <linux/kernel.h>
+#include <linux/zalloc.h>
 #include <sys/time.h>
 
 #include "../util/stat.h"
@@ -214,7 +215,7 @@ int bench_futex_hash(int argc, const char **argv)
 				       &worker[i].futex[nfutexes-1], t);
 		}
 
-		free(worker[i].futex);
+		zfree(&worker[i].futex);
 	}
 
 	print_summary();

tools/perf/bench/futex-lock-pi.c

@@ -12,6 +12,7 @@
 #include <subcmd/parse-options.h>
 #include <linux/compiler.h>
 #include <linux/kernel.h>
+#include <linux/zalloc.h>
 #include <errno.h>
 #include "bench.h"
 #include "futex.h"
@@ -217,7 +218,7 @@ int bench_futex_lock_pi(int argc, const char **argv)
 			       worker[i].tid, worker[i].futex, t);
 
 		if (multi)
-			free(worker[i].futex);
+			zfree(&worker[i].futex);
 	}
 
 	print_summary();

tools/perf/bench/mem-functions.c

@@ -9,7 +9,6 @@
 
 #include "debug.h"
 #include "../perf.h"
-#include "../util/util.h"
 #include <subcmd/parse-options.h>
 #include "../util/header.h"
 #include "../util/cloexec.h"
@@ -24,6 +23,7 @@
 #include <sys/time.h>
 #include <errno.h>
 #include <linux/time64.h>
+#include <linux/zalloc.h>
 
 #define K 1024
 

tools/perf/bench/numa.c

@@ -11,7 +11,6 @@
 
 #include "../perf.h"
 #include "../builtin.h"
-#include "../util/util.h"
 #include <subcmd/parse-options.h>
 #include "../util/cloexec.h"
 
@@ -35,6 +34,7 @@
 #include <linux/kernel.h>
 #include <linux/time64.h>
 #include <linux/numa.h>
+#include <linux/zalloc.h>
 
 #include <numa.h>
 #include <numaif.h>

tools/perf/builtin-annotate.c

@@ -8,11 +8,11 @@
  */
 #include "builtin.h"
 
-#include "util/util.h"
 #include "util/color.h"
 #include <linux/list.h>
 #include "util/cache.h"
 #include <linux/rbtree.h>
+#include <linux/zalloc.h>
 #include "util/symbol.h"
 
 #include "perf.h"

tools/perf/builtin-bench.c

@@ -17,7 +17,6 @@
  *  epoll ... Event poll performance
  */
 #include "perf.h"
-#include "util/util.h"
 #include <subcmd/parse-options.h>
 #include "builtin.h"
 #include "bench/bench.h"
@@ -26,6 +25,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/prctl.h>
+#include <linux/zalloc.h>
 
 typedef int (*bench_fn_t)(int argc, const char **argv);
 

tools/perf/builtin-c2c.c

@@ -15,9 +15,9 @@
 #include <linux/compiler.h>
 #include <linux/kernel.h>
 #include <linux/stringify.h>
+#include <linux/zalloc.h>
 #include <asm/bug.h>
 #include <sys/param.h>
-#include "util.h"
 #include "debug.h"
 #include "builtin.h"
 #include <subcmd/parse-options.h>

tools/perf/builtin-config.c

@@ -15,6 +15,7 @@
 #include "util/debug.h"
 #include "util/config.h"
 #include <linux/string.h>
+#include <stdlib.h>
 
 static bool use_system_config, use_user_config;
 

tools/perf/builtin-diff.c

@@ -16,12 +16,12 @@
 #include "util/tool.h"
 #include "util/sort.h"
 #include "util/symbol.h"
-#include "util/util.h"
 #include "util/data.h"
 #include "util/config.h"
 #include "util/time-utils.h"
 #include "util/annotate.h"
 #include "util/map.h"
+#include <linux/zalloc.h>
 
 #include <errno.h>
 #include <inttypes.h>

tools/perf/builtin-ftrace.c

@@ -431,7 +431,7 @@ static void delete_filter_func(struct list_head *head)
 	struct filter_entry *pos, *tmp;
 
 	list_for_each_entry_safe(pos, tmp, head, list) {
-		list_del(&pos->list);
+		list_del_init(&pos->list);
 		free(pos);
 	}
 }

tools/perf/builtin-help.c

@@ -14,8 +14,10 @@
 #include <subcmd/help.h>
 #include "util/debug.h"
 #include <linux/kernel.h>
+#include <linux/zalloc.h>
 #include <errno.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>

tools/perf/builtin-inject.c

@@ -224,7 +224,7 @@ static int perf_event__repipe_sample(struct perf_tool *tool,
 				     struct perf_evsel *evsel,
 				     struct machine *machine)
 {
-	if (evsel->handler) {
+	if (evsel && evsel->handler) {
 		inject_handler f = evsel->handler;
 		return f(tool, event, sample, evsel, machine);
 	}

tools/perf/builtin-kmem.c

@@ -4,7 +4,6 @@
 
 #include "util/evlist.h"
 #include "util/evsel.h"
-#include "util/util.h"
 #include "util/config.h"
 #include "util/map.h"
 #include "util/symbol.h"
@@ -26,6 +25,7 @@
 #include <linux/kernel.h>
 #include <linux/rbtree.h>
 #include <linux/string.h>
+#include <linux/zalloc.h>
 #include <errno.h>
 #include <inttypes.h>
 #include <locale.h>

tools/perf/builtin-kvm.c

@@ -5,7 +5,6 @@
 #include "util/evsel.h"
 #include "util/evlist.h"
 #include "util/term.h"
-#include "util/util.h"
 #include "util/cache.h"
 #include "util/symbol.h"
 #include "util/thread.h"
@@ -32,6 +31,7 @@
 
 #include <linux/kernel.h>
 #include <linux/time64.h>
+#include <linux/zalloc.h>
 #include <errno.h>
 #include <inttypes.h>
 #include <poll.h>

tools/perf/builtin-lock.c

@@ -6,7 +6,6 @@
 
 #include "util/evlist.h"
 #include "util/evsel.h"
-#include "util/util.h"
 #include "util/cache.h"
 #include "util/symbol.h"
 #include "util/thread.h"
@@ -30,6 +29,7 @@
 #include <linux/list.h>
 #include <linux/hash.h>
 #include <linux/kernel.h>
+#include <linux/zalloc.h>
 
 static struct perf_session *session;
 
@@ -454,7 +454,7 @@ broken:
 		/* broken lock sequence, discard it */
 		ls->discard = 1;
 		bad_hist[BROKEN_ACQUIRE]++;
-		list_del(&seq->list);
+		list_del_init(&seq->list);
 		free(seq);
 		goto end;
 	default:
@@ -515,7 +515,7 @@ static int report_lock_acquired_event(struct perf_evsel *evsel,
 		/* broken lock sequence, discard it */
 		ls->discard = 1;
 		bad_hist[BROKEN_ACQUIRED]++;
-		list_del(&seq->list);
+		list_del_init(&seq->list);
 		free(seq);
 		goto end;
 	default:
@@ -570,7 +570,7 @@ static int report_lock_contended_event(struct perf_evsel *evsel,
 		/* broken lock sequence, discard it */
 		ls->discard = 1;
 		bad_hist[BROKEN_CONTENDED]++;
-		list_del(&seq->list);
+		list_del_init(&seq->list);
 		free(seq);
 		goto end;
 	default:
@@ -639,7 +639,7 @@ static int report_lock_release_event(struct perf_evsel *evsel,
 
 	ls->nr_release++;
 free_seq:
-	list_del(&seq->list);
+	list_del_init(&seq->list);
 	free(seq);
 end:
 	return 0;

tools/perf/builtin-probe.c

@@ -19,7 +19,6 @@
 #include "perf.h"
 #include "builtin.h"
 #include "namespaces.h"
-#include "util/util.h"
 #include "util/strlist.h"
 #include "util/strfilter.h"
 #include "util/symbol.h"
@@ -28,6 +27,7 @@
 #include "util/probe-finder.h"
 #include "util/probe-event.h"
 #include "util/probe-file.h"
+#include <linux/zalloc.h>
 
 #define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
 #define DEFAULT_FUNC_FILTER "!_*"

tools/perf/builtin-record.c

@@ -11,7 +11,6 @@
 #include "perf.h"
 
 #include "util/build-id.h"
-#include "util/util.h"
 #include <subcmd/parse-options.h>
 #include "util/parse-events.h"
 #include "util/config.h"
@@ -54,6 +53,7 @@
 #include <sys/mman.h>
 #include <sys/wait.h>
 #include <linux/time64.h>
+#include <linux/zalloc.h>
 
 struct switch_output {
 	bool		 enabled;
@@ -1110,7 +1110,7 @@ record__switch_output(struct record *rec, bool at_exit)
 		rec->switch_output.cur_file = n;
 		if (rec->switch_output.filenames[n]) {
 			remove(rec->switch_output.filenames[n]);
-			free(rec->switch_output.filenames[n]);
+			zfree(&rec->switch_output.filenames[n]);
 		}
 		rec->switch_output.filenames[n] = new_filename;
 	} else {

tools/perf/builtin-report.c

@@ -8,7 +8,6 @@
  */
 #include "builtin.h"
 
-#include "util/util.h"
 #include "util/config.h"
 
 #include "util/annotate.h"
@@ -16,6 +15,7 @@
 #include <linux/list.h>
 #include <linux/rbtree.h>
 #include <linux/err.h>
+#include <linux/zalloc.h>
 #include "util/map.h"
 #include "util/symbol.h"
 #include "util/callchain.h"
@@ -298,7 +298,7 @@ static int process_read_event(struct perf_tool *tool,
 	struct report *rep = container_of(tool, struct report, tool);
 
 	if (rep->show_threads) {
-		const char *name = evsel ? perf_evsel__name(evsel) : "unknown";
+		const char *name = perf_evsel__name(evsel);
 		int err = perf_read_values_add_value(&rep->show_threads_values,
 					   event->read.pid, event->read.tid,
 					   evsel->idx,

tools/perf/builtin-sched.c

@@ -2,7 +2,6 @@
 #include "builtin.h"
 #include "perf.h"
 
-#include "util/util.h"
 #include "util/evlist.h"
 #include "util/cache.h"
 #include "util/evsel.h"
@@ -26,6 +25,7 @@
 
 #include <linux/kernel.h>
 #include <linux/log2.h>
+#include <linux/zalloc.h>
 #include <sys/prctl.h>
 #include <sys/resource.h>
 #include <inttypes.h>

tools/perf/builtin-script.c

@@ -14,7 +14,6 @@
 #include "util/symbol.h"
 #include "util/thread.h"
 #include "util/trace-event.h"
-#include "util/util.h"
 #include "util/evlist.h"
 #include "util/evsel.h"
 #include "util/sort.h"
@@ -34,6 +33,7 @@
 #include <linux/kernel.h>
 #include <linux/stringify.h>
 #include <linux/time64.h>
+#include <linux/zalloc.h>
 #include <sys/utsname.h>
 #include "asm/bug.h"
 #include "util/mem-events.h"
@@ -3752,7 +3752,8 @@ int cmd_script(int argc, const char **argv)
 		goto out_delete;
 
 	uname(&uts);
-	if (!strcmp(uts.machine, session->header.env.arch) ||
+	if (data.is_pipe ||  /* assume pipe_mode indicates native_arch */
+	    !strcmp(uts.machine, session->header.env.arch) ||
 	    (!strcmp(uts.machine, "x86_64") &&
 	     !strcmp(session->header.env.arch, "i386")))
 		native_arch = true;

tools/perf/builtin-stat.c

@@ -43,7 +43,6 @@
 #include "perf.h"
 #include "builtin.h"
 #include "util/cgroup.h"
-#include "util/util.h"
 #include <subcmd/parse-options.h>
 #include "util/parse-events.h"
 #include "util/pmu.h"
@@ -67,6 +66,7 @@
 #include "asm/bug.h"
 
 #include <linux/time64.h>
+#include <linux/zalloc.h>
 #include <api/fs/fs.h>
 #include <errno.h>
 #include <signal.h>
@@ -1349,8 +1349,8 @@ static int add_default_attributes(void)
 				fprintf(stderr,
 					"Cannot set up top down events %s: %d\n",
 					str, err);
-				free(str);
 				parse_events_print_error(&errinfo, str);
+				free(str);
 				return -1;
 			}
 		} else {
@@ -1586,7 +1586,7 @@ static void runtime_stat_delete(struct perf_stat_config *config)
 	for (i = 0; i < config->stats_num; i++)
 		runtime_stat__exit(&config->stats[i]);
 
-	free(config->stats);
+	zfree(&config->stats);
 }
 
 static const char * const stat_report_usage[] = {
@@ -2003,7 +2003,7 @@ int cmd_stat(int argc, const char **argv)
 	perf_stat__exit_aggr_mode();
 	perf_evlist__free_stats(evsel_list);
 out:
-	free(stat_config.walltime_run);
+	zfree(&stat_config.walltime_run);
 
 	if (smi_cost && smi_reset)
 		sysfs__write_int(FREEZE_ON_SMI_PATH, 0);

tools/perf/builtin-timechart.c

@@ -13,9 +13,6 @@
 #include <traceevent/event-parse.h>
 
 #include "builtin.h"
-
-#include "util/util.h"
-
 #include "util/color.h"
 #include <linux/list.h>
 #include "util/cache.h"
@@ -24,6 +21,7 @@
 #include <linux/kernel.h>
 #include <linux/rbtree.h>
 #include <linux/time64.h>
+#include <linux/zalloc.h>
 #include "util/symbol.h"
 #include "util/thread.h"
 #include "util/callchain.h"

tools/perf/builtin-top.c

@@ -101,7 +101,7 @@ static void perf_top__resize(struct perf_top *top)
 
 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
 {
-	struct perf_evsel *evsel = hists_to_evsel(he->hists);
+	struct perf_evsel *evsel;
 	struct symbol *sym;
 	struct annotation *notes;
 	struct map *map;
@@ -110,6 +110,8 @@ static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
 	if (!he || !he->ms.sym)
 		return -1;
 
+	evsel = hists_to_evsel(he->hists);
+
 	sym = he->ms.sym;
 	map = he->ms.map;
 
@@ -226,7 +228,7 @@ static void perf_top__record_precise_ip(struct perf_top *top,
 static void perf_top__show_details(struct perf_top *top)
 {
 	struct hist_entry *he = top->sym_filter_entry;
-	struct perf_evsel *evsel = hists_to_evsel(he->hists);
+	struct perf_evsel *evsel;
 	struct annotation *notes;
 	struct symbol *symbol;
 	int more;
@@ -234,6 +236,8 @@ static void perf_top__show_details(struct perf_top *top)
 	if (!he)
 		return;
 
+	evsel = hists_to_evsel(he->hists);
+
 	symbol = he->ms.sym;
 	notes = symbol__annotation(symbol);
 

tools/perf/builtin-trace.c

@@ -61,6 +61,7 @@
 #include <linux/random.h>
 #include <linux/stringify.h>
 #include <linux/time64.h>
+#include <linux/zalloc.h>
 #include <fcntl.h>
 #include <sys/sysmacros.h>
 
@@ -1038,10 +1039,10 @@ static struct thread_trace *thread_trace__new(void)
 {
 	struct thread_trace *ttrace =  zalloc(sizeof(struct thread_trace));
 
-	if (ttrace)
+	if (ttrace) {
 		ttrace->files.max = -1;
-
-	ttrace->syscall_stats = intlist__new(NULL);
+		ttrace->syscall_stats = intlist__new(NULL);
+	}
 
 	return ttrace;
 }

tools/perf/perf.c

@@ -18,7 +18,6 @@
 #include "util/bpf-loader.h"
 #include "util/debug.h"
 #include "util/event.h"
-#include "util/util.h"
 #include <api/fs/fs.h>
 #include <api/fs/tracing_path.h>
 #include <errno.h>
@@ -30,6 +29,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 #include <linux/kernel.h>
+#include <linux/zalloc.h>
 
 const char perf_usage_string[] =
 	"perf [--version] [--help] [OPTIONS] COMMAND [ARGS]";

tools/perf/pmu-events/jevents.c

@@ -407,7 +407,7 @@ static void free_arch_std_events(void)
 
 	list_for_each_entry_safe(es, next, &arch_std_events, list) {
 		FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD);
-		list_del(&es->list);
+		list_del_init(&es->list);
 		free(es);
 	}
 }

tools/perf/scripts/python/export-to-postgresql.py

@@ -898,11 +898,11 @@ def trace_end():
 	if is_table_empty("ptwrite"):
 		drop("ptwrite")
 	if is_table_empty("mwait") and is_table_empty("pwre") and is_table_empty("exstop") and is_table_empty("pwrx"):
+		do_query(query, 'DROP VIEW power_events_view');
 		drop("mwait")
 		drop("pwre")
 		drop("exstop")
 		drop("pwrx")
-		do_query(query, 'DROP VIEW power_events_view');
 		if is_table_empty("cbr"):
 			drop("cbr")
 

tools/perf/scripts/python/export-to-sqlite.py

@@ -608,11 +608,11 @@ def trace_end():
 	if is_table_empty("ptwrite"):
 		drop("ptwrite")
 	if is_table_empty("mwait") and is_table_empty("pwre") and is_table_empty("exstop") and is_table_empty("pwrx"):
+		do_query(query, 'DROP VIEW power_events_view');
 		drop("mwait")
 		drop("pwre")
 		drop("exstop")
 		drop("pwrx")
-		do_query(query, 'DROP VIEW power_events_view');
 		if is_table_empty("cbr"):
 			drop("cbr")
 

tools/perf/tests/dwarf-unwind.c

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <linux/types.h>
+#include <linux/zalloc.h>
 #include <inttypes.h>
 #include <unistd.h>
 #include "tests.h"
@@ -115,8 +116,8 @@ noinline int test_dwarf_unwind__thread(struct thread *thread)
 	}
 
  out:
-	free(sample.user_stack.data);
-	free(sample.user_regs.regs);
+	zfree(&sample.user_stack.data);
+	zfree(&sample.user_regs.regs);
 	return err;
 }
 

tools/perf/tests/expr.c

@@ -3,6 +3,7 @@
 #include "util/expr.h"
 #include "tests.h"
 #include <stdlib.h>
+#include <linux/zalloc.h>
 
 static int test(struct parse_ctx *ctx, const char *e, double val2)
 {
@@ -58,7 +59,7 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
 	TEST_ASSERT_VAL("find other", other[3] == NULL);
 
 	for (i = 0; i < num_other; i++)
-		free((void *)other[i]);
+		zfree(&other[i]);
 	free((void *)other);
 
 	return 0;

tools/perf/tests/llvm.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
+#include <stdlib.h>
 #include <bpf/libbpf.h>
 #include <util/llvm-utils.h>
 #include <util/cache.h>

tools/perf/tests/mem2node.c

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <linux/bitmap.h>
+#include <linux/zalloc.h>
 #include "cpumap.h"
 #include "mem2node.h"
 #include "tests.h"
@@ -67,7 +68,7 @@ int test__mem2node(struct test *t __maybe_unused, int subtest __maybe_unused)
 	T("failed: mem2node__node", -1 == mem2node__node(&map, 0x1050));
 
 	for (i = 0; i < ARRAY_SIZE(nodes); i++)
-		free(nodes[i].set);
+		zfree(&nodes[i].set);
 
 	mem2node__exit(&map);
 	return 0;

tools/perf/tests/mmap-thread-lookup.c

@@ -53,7 +53,7 @@ static void *thread_fn(void *arg)
 {
 	struct thread_data *td = arg;
 	ssize_t ret;
-	int go;
+	int go = 0;
 
 	if (thread_init(td))
 		return NULL;

tools/perf/tests/sample-parsing.c

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <stdbool.h>
 #include <inttypes.h>
+#include <stdlib.h>
 #include <linux/bitops.h>
 #include <linux/kernel.h>
 #include <linux/types.h>

tools/perf/tests/switch-tracking.c

@@ -4,6 +4,7 @@
 #include <errno.h>
 #include <time.h>
 #include <stdlib.h>
+#include <linux/zalloc.h>
 
 #include "parse-events.h"
 #include "evlist.h"
@@ -237,7 +238,7 @@ static void free_event_nodes(struct list_head *events)
 
 	while (!list_empty(events)) {
 		node = list_entry(events->next, struct event_node, list);
-		list_del(&node->list);
+		list_del_init(&node->list);
 		free(node);
 	}
 }

tools/perf/tests/thread-map.c

@@ -6,6 +6,7 @@
 #include "tests.h"
 #include "thread_map.h"
 #include "debug.h"
+#include <linux/zalloc.h>
 
 #define NAME	(const char *) "perf"
 #define NAMEUL	(unsigned long) NAME
@@ -133,7 +134,7 @@ int test__thread_map_remove(struct test *test __maybe_unused, int subtest __mayb
 			thread_map__remove(threads, 0));
 
 	for (i = 0; i < threads->nr; i++)
-		free(threads->map[i].comm);
+		zfree(&threads->map[i].comm);
 
 	free(threads);
 	return 0;

tools/perf/tests/vmlinux-kallsyms.c

@@ -3,6 +3,7 @@
 #include <linux/rbtree.h>
 #include <inttypes.h>
 #include <string.h>
+#include <stdlib.h>
 #include "map.h"
 #include "symbol.h"
 #include "util.h"

tools/perf/ui/browser.c

@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#include "../util.h"
 #include "../string2.h"
 #include "../config.h"
 #include "../../perf.h"
@@ -17,6 +16,7 @@
 #include "keysyms.h"
 #include "../color.h"
 #include <linux/ctype.h>
+#include <linux/zalloc.h>
 
 static int ui_browser__percent_color(struct ui_browser *browser,
 				     double percent, bool current)

tools/perf/ui/browser.h

@@ -4,6 +4,7 @@
 
 #include <linux/types.h>
 #include <stdarg.h>
+#include <sys/types.h>
 
 #define HE_COLORSET_TOP		50
 #define HE_COLORSET_MEDIUM	51

tools/perf/ui/browsers/annotate.c

@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#include "../../util/util.h"
 #include "../browser.h"
 #include "../helpline.h"
 #include "../ui.h"
@@ -15,6 +14,7 @@
 #include <pthread.h>
 #include <linux/kernel.h>
 #include <linux/string.h>
+#include <linux/zalloc.h>
 #include <sys/ttydefaults.h>
 #include <asm/bug.h>
 

tools/perf/ui/browsers/hists.c

@@ -9,6 +9,7 @@
 #include <linux/string.h>
 #include <sys/ttydefaults.h>
 #include <linux/time64.h>
+#include <linux/zalloc.h>
 
 #include "../../util/callchain.h"
 #include "../../util/evsel.h"
@@ -18,7 +19,6 @@
 #include "../../util/symbol.h"
 #include "../../util/pstack.h"
 #include "../../util/sort.h"
-#include "../../util/util.h"
 #include "../../util/top.h"
 #include "../../util/thread.h"
 #include "../../arch/common.h"
@@ -639,7 +639,11 @@ int hist_browser__run(struct hist_browser *browser, const char *help,
 		switch (key) {
 		case K_TIMER: {
 			u64 nr_entries;
-			hbt->timer(hbt->arg);
+
+			WARN_ON_ONCE(!hbt);
+
+			if (hbt)
+				hbt->timer(hbt->arg);
 
 			if (hist_browser__has_filter(browser) ||
 			    symbol_conf.report_hierarchy)
@@ -2821,7 +2825,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 {
 	struct hists *hists = evsel__hists(evsel);
 	struct hist_browser *browser = perf_evsel_browser__new(evsel, hbt, env, annotation_opts);
-	struct branch_info *bi;
+	struct branch_info *bi = NULL;
 #define MAX_OPTIONS  16
 	char *options[MAX_OPTIONS];
 	struct popup_action actions[MAX_OPTIONS];
@@ -3087,7 +3091,9 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 			goto skip_annotation;
 
 		if (sort__mode == SORT_MODE__BRANCH) {
-			bi = browser->he_selection->branch_info;
+
+			if (browser->he_selection)
+				bi = browser->he_selection->branch_info;
 
 			if (bi == NULL)
 				goto skip_annotation;
@@ -3271,7 +3277,8 @@ static int perf_evsel_menu__run(struct perf_evsel_menu *menu,
 
 		switch (key) {
 		case K_TIMER:
-			hbt->timer(hbt->arg);
+			if (hbt)
+				hbt->timer(hbt->arg);
 
 			if (!menu->lost_events_warned &&
 			    menu->lost_events &&

tools/perf/ui/browsers/map.c

@@ -2,6 +2,7 @@
 #include <elf.h>
 #include <inttypes.h>
 #include <sys/ttydefaults.h>
+#include <stdlib.h>
 #include <string.h>
 #include <linux/bitops.h>
 #include "../../util/util.h"

tools/perf/ui/browsers/res_sample.c

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Display a menu with individual samples to browse with perf script */
-#include "util.h"
 #include "hist.h"
 #include "evsel.h"
 #include "hists.h"
@@ -8,6 +7,7 @@
 #include "config.h"
 #include "time-utils.h"
 #include <linux/time64.h>
+#include <linux/zalloc.h>
 
 static u64 context_len = 10 * NSEC_PER_MSEC;
 
@@ -46,14 +46,14 @@ int res_sample_browse(struct res_sample *res_samples, int num_res,
 		if (asprintf(&names[i], "%s: CPU %d tid %d", tbuf,
 			     res_samples[i].cpu, res_samples[i].tid) < 0) {
 			while (--i >= 0)
-				free(names[i]);
+				zfree(&names[i]);
 			free(names);
 			return -1;
 		}
 	}
 	choice = ui__popup_menu(num_res, names);
 	for (i = 0; i < num_res; i++)
-		free(names[i]);
+		zfree(&names[i]);
 	free(names);
 
 	if (choice < 0 || choice >= num_res)

tools/perf/ui/browsers/scripts.c

@@ -1,12 +1,12 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "../../util/sort.h"
-#include "../../util/util.h"
 #include "../../util/hist.h"
 #include "../../util/debug.h"
 #include "../../util/symbol.h"
 #include "../browser.h"
 #include "../libslang.h"
 #include "config.h"
+#include <linux/zalloc.h>
 
 #define SCRIPT_NAMELEN	128
 #define SCRIPT_MAX_NO	64
@@ -142,7 +142,7 @@ static int list_scripts(char *script_name, bool *custom,
 out:
 	free(buf);
 	for (i = 0; i < max_std; i++)
-		free(paths[i]);
+		zfree(&paths[i]);
 	return ret;
 }
 

tools/perf/ui/gtk/annotate.c

@@ -152,7 +152,7 @@ static int perf_gtk__annotate_symbol(GtkWidget *window, struct symbol *sym,
 	gtk_container_add(GTK_CONTAINER(window), view);
 
 	list_for_each_entry_safe(pos, n, &notes->src->source, al.node) {
-		list_del(&pos->al.node);
+		list_del_init(&pos->al.node);
 		disasm_line__free(pos);
 	}
 

tools/perf/ui/gtk/util.c

@@ -1,11 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "../util.h"
-#include "../../util/util.h"
 #include "../../util/debug.h"
 #include "gtk.h"
 
 #include <string.h>
-
+#include <linux/zalloc.h>
 
 struct perf_gtk_context *pgctx;
 

tools/perf/ui/stdio/hist.c

@@ -3,7 +3,6 @@
 #include <linux/string.h>
 
 #include "../../util/callchain.h"
-#include "../../util/util.h"
 #include "../../util/hist.h"
 #include "../../util/map.h"
 #include "../../util/map_groups.h"
@@ -14,6 +13,7 @@
 #include "../../util/string2.h"
 #include "../../util/thread.h"
 #include <linux/ctype.h>
+#include <linux/zalloc.h>
 
 static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
 {

tools/perf/ui/tui/setup.c

@@ -2,6 +2,7 @@
 #include <errno.h>
 #include <signal.h>
 #include <stdbool.h>
+#include <stdlib.h>
 #include <linux/kernel.h>
 #ifdef HAVE_BACKTRACE_SUPPORT
 #include <execinfo.h>

tools/perf/ui/tui/util.c

@@ -1,8 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0
-#include "../../util/util.h"
 #include <signal.h>
 #include <stdbool.h>
 #include <string.h>
+#include <stdlib.h>
 #include <sys/ttydefaults.h>
 
 #include "../../util/cache.h"

tools/perf/util/Build

@@ -25,6 +25,7 @@ perf-y += rbtree.o
 perf-y += libstring.o
 perf-y += bitmap.o
 perf-y += hweight.o
+perf-y += zalloc.o
 perf-y += smt.o
 perf-y += strbuf.o
 perf-y += string.o
@@ -241,3 +242,7 @@ $(OUTPUT)util/hweight.o: ../lib/hweight.c FORCE
 $(OUTPUT)util/vsprintf.o: ../lib/vsprintf.c FORCE
 	$(call rule_mkdir)
 	$(call if_changed_dep,cc_o_c)
+
+$(OUTPUT)util/zalloc.o: ../lib/zalloc.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)

tools/perf/util/annotate.c

@@ -1119,16 +1119,14 @@ static int disasm_line__parse(char *line, const char **namep, char **rawp)
 	*namep = strdup(name);
 
 	if (*namep == NULL)
-		goto out_free_name;
+		goto out;
 
 	(*rawp)[0] = tmp;
 	*rawp = skip_spaces(*rawp);
 
 	return 0;
 
-out_free_name:
-	free((void *)namep);
-	*namep = NULL;
+out:
 	return -1;
 }
 
@@ -1237,8 +1235,7 @@ void disasm_line__free(struct disasm_line *dl)
 		dl->ins.ops->free(&dl->ops);
 	else
 		ins__delete(&dl->ops);
-	free((void *)dl->ins.name);
-	dl->ins.name = NULL;
+	zfree(&dl->ins.name);
 	annotation_line__delete(&dl->al);
 }
 
@@ -1589,7 +1586,7 @@ static void delete_last_nop(struct symbol *sym)
 				return;
 		}
 
-		list_del(&dl->al.node);
+		list_del_init(&dl->al.node);
 		disasm_line__free(dl);
 	}
 }
@@ -2466,7 +2463,7 @@ void annotated_source__purge(struct annotated_source *as)
 	struct annotation_line *al, *n;
 
 	list_for_each_entry_safe(al, n, &as->source, node) {
-		list_del(&al->node);
+		list_del_init(&al->node);
 		disasm_line__free(disasm_line(al));
 	}
 }

tools/perf/util/arm-spe.c

@@ -12,6 +12,7 @@
 #include <linux/types.h>
 #include <linux/bitops.h>
 #include <linux/log2.h>
+#include <linux/zalloc.h>
 
 #include "cpumap.h"
 #include "color.h"
@@ -19,7 +20,6 @@
 #include "evlist.h"
 #include "machine.h"
 #include "session.h"
-#include "util.h"
 #include "thread.h"
 #include "debug.h"
 #include "auxtrace.h"

tools/perf/util/auxtrace.c

@@ -24,9 +24,9 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <linux/list.h>
+#include <linux/zalloc.h>
 
 #include "../perf.h"
-#include "util.h"
 #include "evlist.h"
 #include "dso.h"
 #include "map.h"
@@ -408,7 +408,7 @@ void auxtrace_queues__free(struct auxtrace_queues *queues)
 
 			buffer = list_entry(queues->queue_array[i].head.next,
 					    struct auxtrace_buffer, list);
-			list_del(&buffer->list);
+			list_del_init(&buffer->list);
 			auxtrace_buffer__free(buffer);
 		}
 	}
@@ -612,7 +612,7 @@ void auxtrace_index__free(struct list_head *head)
 	struct auxtrace_index *auxtrace_index, *n;
 
 	list_for_each_entry_safe(auxtrace_index, n, head, list) {
-		list_del(&auxtrace_index->list);
+		list_del_init(&auxtrace_index->list);
 		free(auxtrace_index);
 	}
 }
@@ -1413,7 +1413,7 @@ void auxtrace_cache__free(struct auxtrace_cache *c)
 		return;
 
 	auxtrace_cache__drop(c);
-	free(c->hashtable);
+	zfree(&c->hashtable);
 	free(c);
 }
 
@@ -1459,12 +1459,11 @@ void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key)
 
 static void addr_filter__free_str(struct addr_filter *filt)
 {
-	free(filt->str);
+	zfree(&filt->str);
 	filt->action   = NULL;
 	filt->sym_from = NULL;
 	filt->sym_to   = NULL;
 	filt->filename = NULL;
-	filt->str      = NULL;
 }
 
 static struct addr_filter *addr_filter__new(void)

tools/perf/util/bpf-loader.c

@@ -12,6 +12,7 @@
 #include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/string.h>
+#include <linux/zalloc.h>
 #include <errno.h>
 #include "perf.h"
 #include "debug.h"
@@ -828,7 +829,7 @@ static void
 bpf_map_op__delete(struct bpf_map_op *op)
 {
 	if (!list_empty(&op->list))
-		list_del(&op->list);
+		list_del_init(&op->list);
 	if (op->key_type == BPF_MAP_KEY_RANGES)
 		parse_events__clear_array(&op->k.array);
 	free(op);

tools/perf/util/build-id.c

@@ -30,6 +30,7 @@
 #include "strlist.h"
 
 #include <linux/ctype.h>
+#include <linux/zalloc.h>
 
 static bool no_buildid_cache;
 

tools/perf/util/call-path.c

@@ -6,8 +6,9 @@
 
 #include <linux/rbtree.h>
 #include <linux/list.h>
+#include <linux/zalloc.h>
+#include <stdlib.h>
 
-#include "util.h"
 #include "call-path.h"
 
 static void call_path__init(struct call_path *cp, struct call_path *parent,
@@ -39,7 +40,7 @@ void call_path_root__free(struct call_path_root *cpr)
 	struct call_path_block *pos, *n;
 
 	list_for_each_entry_safe(pos, n, &cpr->blocks, node) {
-		list_del(&pos->node);
+		list_del_init(&pos->node);
 		free(pos);
 	}
 	free(cpr);

tools/perf/util/callchain.c

@@ -16,11 +16,11 @@
 #include <stdbool.h>
 #include <errno.h>
 #include <math.h>
+#include <linux/zalloc.h>
 
 #include "asm/bug.h"
 
 #include "hist.h"
-#include "util.h"
 #include "sort.h"
 #include "machine.h"
 #include "map.h"
@@ -636,7 +636,7 @@ add_child(struct callchain_node *parent,
 		struct callchain_list *call, *tmp;
 
 		list_for_each_entry_safe(call, tmp, &new->val, list) {
-			list_del(&call->list);
+			list_del_init(&call->list);
 			map__zput(call->ms.map);
 			free(call);
 		}
@@ -1002,7 +1002,7 @@ merge_chain_branch(struct callchain_cursor *cursor,
 		callchain_cursor_append(cursor, list->ip,
 					list->ms.map, list->ms.sym,
 					false, NULL, 0, 0, 0, list->srcline);
-		list_del(&list->list);
+		list_del_init(&list->list);
 		map__zput(list->ms.map);
 		free(list);
 	}
@@ -1453,13 +1453,13 @@ static void free_callchain_node(struct callchain_node *node)
 	struct rb_node *n;
 
 	list_for_each_entry_safe(list, tmp, &node->parent_val, list) {
-		list_del(&list->list);
+		list_del_init(&list->list);
 		map__zput(list->ms.map);
 		free(list);
 	}
 
 	list_for_each_entry_safe(list, tmp, &node->val, list) {
-		list_del(&list->list);
+		list_del_init(&list->list);
 		map__zput(list->ms.map);
 		free(list);
 	}
@@ -1544,7 +1544,7 @@ int callchain_node__make_parent_list(struct callchain_node *node)
 
 out:
 	list_for_each_entry_safe(chain, new, &head, list) {
-		list_del(&chain->list);
+		list_del_init(&chain->list);
 		map__zput(chain->ms.map);
 		free(chain);
 	}

tools/perf/util/cgroup.c

@@ -1,11 +1,11 @@
 // SPDX-License-Identifier: GPL-2.0
-#include "util.h"
 #include "../perf.h"
 #include <subcmd/parse-options.h>
 #include "evsel.h"
 #include "cgroup.h"
 #include "evlist.h"
 #include <linux/stringify.h>
+#include <linux/zalloc.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
@@ -124,7 +124,7 @@ static struct cgroup *cgroup__new(const char *name)
 	return cgroup;
 
 out_free_name:
-	free(cgroup->name);
+	zfree(&cgroup->name);
 out_err:
 	free(cgroup);
 	return NULL;

tools/perf/util/comm.c

@@ -1,12 +1,12 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "comm.h"
-#include "util.h"
 #include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <linux/refcount.h>
 #include <linux/rbtree.h>
+#include <linux/zalloc.h>
 #include "rwsem.h"
 
 struct comm_str {

tools/perf/util/config.c

@@ -11,7 +11,6 @@
  */
 #include <errno.h>
 #include <sys/param.h>
-#include "util.h"
 #include "cache.h"
 #include "callchain.h"
 #include <subcmd/exec-cmd.h>
@@ -23,7 +22,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 #include <linux/string.h>
-
+#include <linux/zalloc.h>
 #include <linux/ctype.h>
 
 #define MAXNAME (256)

tools/perf/util/counts.c

@@ -3,7 +3,7 @@
 #include <stdlib.h>
 #include "evsel.h"
 #include "counts.h"
-#include "util.h"
+#include <linux/zalloc.h>
 
 struct perf_counts *perf_counts__new(int ncpus, int nthreads)
 {

tools/perf/util/cpumap.c

@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#include "util.h"
 #include <api/fs/fs.h>
 #include "../perf.h"
 #include "cpumap.h"
@@ -11,6 +10,7 @@
 #include "asm/bug.h"
 
 #include <linux/ctype.h>
+#include <linux/zalloc.h>
 
 static int max_cpu_num;
 static int max_present_cpu_num;

tools/perf/util/cputopo.c

@@ -2,11 +2,12 @@
 #include <sys/param.h>
 #include <sys/utsname.h>
 #include <inttypes.h>
+#include <stdlib.h>
 #include <api/fs/fs.h>
+#include <linux/zalloc.h>
 
 #include "cputopo.h"
 #include "cpumap.h"
-#include "util.h"
 #include "env.h"
 
 #define CORE_SIB_FMT \
@@ -343,7 +344,7 @@ void numa_topology__delete(struct numa_topology *tp)
 	u32 i;
 
 	for (i = 0; i < tp->nr; i++)
-		free(tp->nodes[i].cpus);
+		zfree(&tp->nodes[i].cpus);
 
 	free(tp);
 }

tools/perf/util/cs-etm-decoder/cs-etm-decoder.c

@@ -8,6 +8,7 @@
 
 #include <linux/err.h>
 #include <linux/list.h>
+#include <linux/zalloc.h>
 #include <stdlib.h>
 #include <opencsd/c_api/opencsd_c_api.h>
 #include <opencsd/etmv4/trc_pkt_types_etmv4.h>

tools/perf/util/cs-etm.c

@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/log2.h>
 #include <linux/types.h>
+#include <linux/zalloc.h>
 
 #include <opencsd/ocsd_if_types.h>
 #include <stdlib.h>
@@ -554,8 +555,7 @@ static void cs_etm__free_traceid_queues(struct cs_etm_queue *etmq)
 	etmq->traceid_queues_list = NULL;
 
 	/* finally free the traceid_queues array */
-	free(etmq->traceid_queues);
-	etmq->traceid_queues = NULL;
+	zfree(&etmq->traceid_queues);
 }
 
 static void cs_etm__free_queue(void *priv)
@@ -2538,7 +2538,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
 		return 0;
 	}
 
-	if (session->itrace_synth_opts && session->itrace_synth_opts->set) {
+	if (session->itrace_synth_opts->set) {
 		etm->synth_opts = *session->itrace_synth_opts;
 	} else {
 		itrace_synth_opts__set_default(&etm->synth_opts,
@@ -2568,7 +2568,7 @@ err_free_etm:
 err_free_metadata:
 	/* No need to check @metadata[j], free(NULL) is supported */
 	for (j = 0; j < num_cpu; j++)
-		free(metadata[j]);
+		zfree(&metadata[j]);
 	zfree(&metadata);
 err_free_traceid_list:
 	intlist__delete(traceid_list);

tools/perf/util/data-convert-bt.c

@@ -10,6 +10,7 @@
 #include <inttypes.h>
 #include <linux/compiler.h>
 #include <linux/kernel.h>
+#include <linux/zalloc.h>
 #include <babeltrace/ctf-writer/writer.h>
 #include <babeltrace/ctf-writer/clock.h>
 #include <babeltrace/ctf-writer/stream.h>
@@ -22,7 +23,6 @@
 #include "asm/bug.h"
 #include "data-convert-bt.h"
 #include "session.h"
-#include "util.h"
 #include "debug.h"
 #include "tool.h"
 #include "evlist.h"
@@ -1353,7 +1353,7 @@ static void free_streams(struct ctf_writer *cw)
 	for (cpu = 0; cpu < cw->stream_cnt; cpu++)
 		ctf_stream__delete(cw->stream[cpu]);
 
-	free(cw->stream);
+	zfree(&cw->stream);
 }
 
 static int ctf_writer__setup_env(struct ctf_writer *cw,

tools/perf/util/data.c

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/compiler.h>
 #include <linux/kernel.h>
+#include <linux/zalloc.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <errno.h>
@@ -20,7 +21,7 @@ static void close_dir(struct perf_data_file *files, int nr)
 {
 	while (--nr >= 1) {
 		close(files[nr].fd);
-		free(files[nr].path);
+		zfree(&files[nr].path);
 	}
 	free(files);
 }

tools/perf/util/db-export.c

@@ -5,6 +5,7 @@
  */
 
 #include <errno.h>
+#include <stdlib.h>
 
 #include "evsel.h"
 #include "machine.h"
@@ -13,11 +14,11 @@
 #include "symbol.h"
 #include "map.h"
 #include "event.h"
-#include "util.h"
 #include "thread-stack.h"
 #include "callchain.h"
 #include "call-path.h"
 #include "db-export.h"
+#include <linux/zalloc.h>
 
 struct deferred_export {
 	struct list_head node;
@@ -33,7 +34,7 @@ static int db_export__deferred(struct db_export *dbe)
 		de = list_entry(dbe->deferred.next, struct deferred_export,
 				node);
 		err = dbe->export_comm(dbe, de->comm);
-		list_del(&de->node);
+		list_del_init(&de->node);
 		free(de);
 		if (err)
 			return err;
@@ -49,7 +50,7 @@ static void db_export__free_deferred(struct db_export *dbe)
 	while (!list_empty(&dbe->deferred)) {
 		de = list_entry(dbe->deferred.next, struct deferred_export,
 				node);
-		list_del(&de->node);
+		list_del_init(&de->node);
 		free(de);
 	}
 }

tools/perf/util/debug.c

@@ -7,6 +7,7 @@
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <sys/wait.h>
 #include <api/debug.h>
 #include <linux/time64.h>

tools/perf/util/demangle-java.c

@@ -1,14 +1,15 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <sys/types.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
-#include "util.h"
 #include "debug.h"
 #include "symbol.h"
 
 #include "demangle-java.h"
 
 #include <linux/ctype.h>
+#include <linux/kernel.h>
 
 enum {
 	MODE_PREFIX = 0,

tools/perf/util/dso.c

@@ -2,6 +2,7 @@
 #include <asm/bug.h>
 #include <linux/kernel.h>
 #include <linux/string.h>
+#include <linux/zalloc.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/types.h>
@@ -21,7 +22,7 @@
 #include "dso.h"
 #include "machine.h"
 #include "auxtrace.h"
-#include "util.h"
+#include "util.h" /* O_CLOEXEC for older systems */
 #include "debug.h"
 #include "string2.h"
 #include "vdso.h"
@@ -433,7 +434,7 @@ static void dso__list_add(struct dso *dso)
 
 static void dso__list_del(struct dso *dso)
 {
-	list_del(&dso->data.open_entry);
+	list_del_init(&dso->data.open_entry);
 	WARN_ONCE(dso__data_open_cnt <= 0,
 		  "DSO data fd counter out of bounds.");
 	dso__data_open_cnt--;

tools/perf/util/dwarf-aux.c

@@ -6,7 +6,7 @@
 #include <errno.h>
 #include <inttypes.h>
 #include <stdbool.h>
-#include "util.h"
+#include <stdlib.h>
 #include "debug.h"
 #include "dwarf-aux.h"
 #include "string2.h"

tools/perf/util/env.c

@@ -2,11 +2,12 @@
 #include "cpumap.h"
 #include "env.h"
 #include <linux/ctype.h>
-#include "util.h"
+#include <linux/zalloc.h>
 #include "bpf-event.h"
 #include <errno.h>
 #include <sys/utsname.h>
 #include <bpf/libbpf.h>
+#include <stdlib.h>
 
 struct perf_env perf_env;
 
@@ -186,7 +187,7 @@ void perf_env__exit(struct perf_env *env)
 	zfree(&env->caches);
 
 	for (i = 0; i < env->nr_memory_nodes; i++)
-		free(env->memory_nodes[i].set);
+		zfree(&env->memory_nodes[i].set);
 	zfree(&env->memory_nodes);
 }
 
@@ -286,9 +287,9 @@ int perf_env__nr_cpus_avail(struct perf_env *env)
 
 void cpu_cache_level__free(struct cpu_cache_level *cache)
 {
-	free(cache->type);
-	free(cache->map);
-	free(cache->size);
+	zfree(&cache->type);
+	zfree(&cache->map);
+	zfree(&cache->size);
 }
 
 /*

tools/perf/util/event.c

@@ -11,6 +11,7 @@
 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
 #include <api/fs/fs.h>
 #include <linux/perf_event.h>
+#include <linux/zalloc.h>
 #include "event.h"
 #include "debug.h"
 #include "hist.h"
@@ -855,7 +856,7 @@ free_threads:
 	free(synthesize_threads);
 free_dirent:
 	for (i = 0; i < n; i++)
-		free(dirent[i]);
+		zfree(&dirent[i]);
 	free(dirent);
 
 	return err;

tools/perf/util/evlist.c

@@ -5,7 +5,6 @@
  * Parts came from builtin-{top,stat,record}.c, see those files for further
  * copyright notes.
  */
-#include "util.h"
 #include <api/fs/fs.h>
 #include <errno.h>
 #include <inttypes.h>
@@ -33,6 +32,7 @@
 #include <linux/hash.h>
 #include <linux/log2.h>
 #include <linux/err.h>
+#include <linux/zalloc.h>
 
 #ifdef LACKS_SIGQUEUE_PROTOTYPE
 int sigqueue(pid_t pid, int sig, const union sigval value);

tools/perf/util/evsel.c

@@ -17,6 +17,7 @@
 #include <linux/perf_event.h>
 #include <linux/compiler.h>
 #include <linux/err.h>
+#include <linux/zalloc.h>
 #include <sys/ioctl.h>
 #include <sys/resource.h>
 #include <sys/types.h>
@@ -27,7 +28,6 @@
 #include "event.h"
 #include "evsel.h"
 #include "evlist.h"
-#include "util.h"
 #include "cpumap.h"
 #include "thread_map.h"
 #include "target.h"
@@ -1298,7 +1298,7 @@ static void perf_evsel__free_config_terms(struct perf_evsel *evsel)
 	struct perf_evsel_config_term *term, *h;
 
 	list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
-		list_del(&term->list);
+		list_del_init(&term->list);
 		free(term);
 	}
 }

tools/perf/util/get_current_dir_name.c

@@ -1,8 +1,8 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2018, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
+// SPDX-License-Identifier: LGPL-2.1
+// Copyright (C) 2018, 2019 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
 //
 #ifndef HAVE_GET_CURRENT_DIR_NAME
-#include "util.h"
+#include "get_current_dir_name.h"
 #include <unistd.h>
 #include <stdlib.h>
 #include <stdlib.h>

tools/perf/util/get_current_dir_name.h

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: LGPL-2.1
+// Copyright (C) 2018, 2019 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
+//
+#ifndef __PERF_GET_CURRENT_DIR_NAME_H
+#ifndef HAVE_GET_CURRENT_DIR_NAME
+char *get_current_dir_name(void);
+#endif // HAVE_GET_CURRENT_DIR_NAME
+#endif // __PERF_GET_CURRENT_DIR_NAME_H

tools/perf/util/header.c

@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
 #include <inttypes.h>
-#include "util.h"
 #include "string2.h"
 #include <sys/param.h>
 #include <sys/types.h>
@@ -15,6 +14,7 @@
 #include <linux/bitops.h>
 #include <linux/string.h>
 #include <linux/stringify.h>
+#include <linux/zalloc.h>
 #include <sys/stat.h>
 #include <sys/utsname.h>
 #include <linux/time64.h>
@@ -1052,7 +1052,7 @@ static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 lev
 
 	scnprintf(file, PATH_MAX, "%s/size", path);
 	if (sysfs__read_str(file, &cache->size, &len)) {
-		free(cache->type);
+		zfree(&cache->type);
 		return -1;
 	}
 
@@ -1061,8 +1061,8 @@ static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 lev
 
 	scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
 	if (sysfs__read_str(file, &cache->map, &len)) {
-		free(cache->map);
-		free(cache->type);
+		zfree(&cache->map);
+		zfree(&cache->type);
 		return -1;
 	}
 

tools/perf/util/help-unknown-cmd.c

@@ -3,9 +3,11 @@
 #include "config.h"
 #include <poll.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <subcmd/help.h>
 #include "../builtin.h"
 #include "levenshtein.h"
+#include <linux/zalloc.h>
 
 static int autocorrect;
 

tools/perf/util/hist.c

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "callchain.h"
-#include "util.h"
 #include "build-id.h"
 #include "hist.h"
 #include "map.h"
@@ -20,6 +19,7 @@
 #include <inttypes.h>
 #include <sys/param.h>
 #include <linux/time64.h>
+#include <linux/zalloc.h>
 
 static bool hists__filter_entry_by_dso(struct hists *hists,
 				       struct hist_entry *he);
@@ -472,16 +472,16 @@ static int hist_entry__init(struct hist_entry *he,
 	return 0;
 
 err_srcline:
-	free(he->srcline);
+	zfree(&he->srcline);
 
 err_rawdata:
-	free(he->raw_data);
+	zfree(&he->raw_data);
 
 err_infos:
 	if (he->branch_info) {
 		map__put(he->branch_info->from.map);
 		map__put(he->branch_info->to.map);
-		free(he->branch_info);
+		zfree(&he->branch_info);
 	}
 	if (he->mem_info) {
 		map__put(he->mem_info->iaddr.map);
@@ -489,7 +489,7 @@ err_infos:
 	}
 err:
 	map__zput(he->ms.map);
-	free(he->stat_acc);
+	zfree(&he->stat_acc);
 	return -ENOMEM;
 }
 
@@ -1254,10 +1254,10 @@ void hist_entry__delete(struct hist_entry *he)
 	zfree(&he->stat_acc);
 	free_srcline(he->srcline);
 	if (he->srcfile && he->srcfile[0])
-		free(he->srcfile);
+		zfree(&he->srcfile);
 	free_callchain(he->callchain);
-	free(he->trace_output);
-	free(he->raw_data);
+	zfree(&he->trace_output);
+	zfree(&he->raw_data);
 	ops->free(he);
 }
 
@@ -2741,10 +2741,10 @@ static void hists_evsel__exit(struct perf_evsel *evsel)
 
 	list_for_each_entry_safe(node, tmp, &hists->hpp_formats, list) {
 		perf_hpp_list__for_each_format_safe(&node->hpp, fmt, pos) {
-			list_del(&fmt->list);
+			list_del_init(&fmt->list);
 			free(fmt);
 		}
-		list_del(&node->list);
+		list_del_init(&node->list);
 		free(node);
 	}
 }