Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

drivers/net/can/pch_can.c
  ae64438be1 ("can: dev: fix skb drop check")
  1dd1b521be ("can: remove obsolete PCH CAN driver")
https://lore.kernel.org/all/20221110102509.1f7d63cc@canb.auug.org.au/

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

kernel/bpf/verifier.c

@@ -1027,12 +1027,17 @@ out:
  */
 static void *realloc_array(void *arr, size_t old_n, size_t new_n, size_t size)
 {
+	void *new_arr;
+
 	if (!new_n || old_n == new_n)
 		goto out;
 
-	arr = krealloc_array(arr, new_n, size, GFP_KERNEL);
-	if (!arr)
+	new_arr = krealloc_array(arr, new_n, size, GFP_KERNEL);
+	if (!new_arr) {
+		kfree(arr);
 		return NULL;
+	}
+	arr = new_arr;
 
 	if (new_n > old_n)
 		memset(arr + old_n * size, 0, (new_n - old_n) * size);
@@ -6618,8 +6623,12 @@ static int release_reference(struct bpf_verifier_env *env,
 		return err;
 
 	bpf_for_each_reg_in_vstate(env->cur_state, state, reg, ({
-		if (reg->ref_obj_id == ref_obj_id)
-			__mark_reg_unknown(env, reg);
+		if (reg->ref_obj_id == ref_obj_id) {
+			if (!env->allow_ptr_leaks)
+				__mark_reg_not_init(env, reg);
+			else
+				__mark_reg_unknown(env, reg);
+		}
 	}));
 
 	return 0;

kernel/events/hw_breakpoint_test.c

@@ -295,11 +295,11 @@ static int test_init(struct kunit *test)
 {
 	/* Most test cases want 2 distinct CPUs. */
 	if (num_online_cpus() < 2)
-		return -EINVAL;
+		kunit_skip(test, "not enough cpus");
 
 	/* Want the system to not use breakpoints elsewhere. */
 	if (hw_breakpoint_is_used())
-		return -EBUSY;
+		kunit_skip(test, "hw breakpoint already in use");
 
 	return 0;
 }

kernel/kprobes.c

@@ -2429,8 +2429,11 @@ int enable_kprobe(struct kprobe *kp)
 	if (!kprobes_all_disarmed && kprobe_disabled(p)) {
 		p->flags &= ~KPROBE_FLAG_DISABLED;
 		ret = arm_kprobe(p);
-		if (ret)
+		if (ret) {
 			p->flags |= KPROBE_FLAG_DISABLED;
+			if (p != kp)
+				kp->flags |= KPROBE_FLAG_DISABLED;
+		}
 	}
 out:
 	mutex_unlock(&kprobe_mutex);

kernel/trace/fprobe.c

@@ -141,6 +141,8 @@ static int fprobe_init_rethook(struct fprobe *fp, int num)
 		return -E2BIG;
 
 	fp->rethook = rethook_alloc((void *)fp, fprobe_exit_handler);
+	if (!fp->rethook)
+		return -ENOMEM;
 	for (i = 0; i < size; i++) {
 		struct fprobe_rethook_node *node;
 
@@ -301,7 +303,8 @@ int unregister_fprobe(struct fprobe *fp)
 {
 	int ret;
 
-	if (!fp || fp->ops.func != fprobe_handler)
+	if (!fp || (fp->ops.saved_func != fprobe_handler &&
+		    fp->ops.saved_func != fprobe_kprobe_handler))
 		return -EINVAL;
 
 	/*

kernel/trace/ftrace.c

@@ -3028,18 +3028,8 @@ int ftrace_shutdown(struct ftrace_ops *ops, int command)
 		command |= FTRACE_UPDATE_TRACE_FUNC;
 	}
 
-	if (!command || !ftrace_enabled) {
-		/*
-		 * If these are dynamic or per_cpu ops, they still
-		 * need their data freed. Since, function tracing is
-		 * not currently active, we can just free them
-		 * without synchronizing all CPUs.
-		 */
-		if (ops->flags & FTRACE_OPS_FL_DYNAMIC)
-			goto free_ops;
-
-		return 0;
-	}
+	if (!command || !ftrace_enabled)
+		goto out;
 
 	/*
 	 * If the ops uses a trampoline, then it needs to be
@@ -3076,6 +3066,7 @@ int ftrace_shutdown(struct ftrace_ops *ops, int command)
 	removed_ops = NULL;
 	ops->flags &= ~FTRACE_OPS_FL_REMOVING;
 
+out:
 	/*
 	 * Dynamic ops may be freed, we must make sure that all
 	 * callers are done before leaving this function.
@@ -3103,7 +3094,6 @@ int ftrace_shutdown(struct ftrace_ops *ops, int command)
 		if (IS_ENABLED(CONFIG_PREEMPTION))
 			synchronize_rcu_tasks();
 
- free_ops:
 		ftrace_trampoline_free(ops);
 	}
 

kernel/trace/kprobe_event_gen_test.c

@@ -100,20 +100,20 @@ static int __init test_gen_kprobe_cmd(void)
 					 KPROBE_GEN_TEST_FUNC,
 					 KPROBE_GEN_TEST_ARG0, KPROBE_GEN_TEST_ARG1);
 	if (ret)
-		goto free;
+		goto out;
 
 	/* Use kprobe_event_add_fields to add the rest of the fields */
 
 	ret = kprobe_event_add_fields(&cmd, KPROBE_GEN_TEST_ARG2, KPROBE_GEN_TEST_ARG3);
 	if (ret)
-		goto free;
+		goto out;
 
 	/*
 	 * This actually creates the event.
 	 */
 	ret = kprobe_event_gen_cmd_end(&cmd);
 	if (ret)
-		goto free;
+		goto out;
 
 	/*
 	 * Now get the gen_kprobe_test event file.  We need to prevent
@@ -136,13 +136,11 @@ static int __init test_gen_kprobe_cmd(void)
 		goto delete;
 	}
  out:
+	kfree(buf);
 	return ret;
  delete:
 	/* We got an error after creating the event, delete it */
 	ret = kprobe_event_delete("gen_kprobe_test");
- free:
-	kfree(buf);
-
 	goto out;
 }
 
@@ -170,14 +168,14 @@ static int __init test_gen_kretprobe_cmd(void)
 					    KPROBE_GEN_TEST_FUNC,
 					    "$retval");
 	if (ret)
-		goto free;
+		goto out;
 
 	/*
 	 * This actually creates the event.
 	 */
 	ret = kretprobe_event_gen_cmd_end(&cmd);
 	if (ret)
-		goto free;
+		goto out;
 
 	/*
 	 * Now get the gen_kretprobe_test event file.  We need to
@@ -201,13 +199,11 @@ static int __init test_gen_kretprobe_cmd(void)
 		goto delete;
 	}
  out:
+	kfree(buf);
 	return ret;
  delete:
 	/* We got an error after creating the event, delete it */
 	ret = kprobe_event_delete("gen_kretprobe_test");
- free:
-	kfree(buf);
-
 	goto out;
 }
 

kernel/trace/ring_buffer.c

@@ -937,6 +937,9 @@ void ring_buffer_wake_waiters(struct trace_buffer *buffer, int cpu)
 	struct ring_buffer_per_cpu *cpu_buffer;
 	struct rb_irq_work *rbwork;
 
+	if (!buffer)
+		return;
+
 	if (cpu == RING_BUFFER_ALL_CPUS) {
 
 		/* Wake up individual ones too. One level recursion */
@@ -945,7 +948,15 @@ void ring_buffer_wake_waiters(struct trace_buffer *buffer, int cpu)
 
 		rbwork = &buffer->irq_work;
 	} else {
+		if (WARN_ON_ONCE(!buffer->buffers))
+			return;
+		if (WARN_ON_ONCE(cpu >= nr_cpu_ids))
+			return;
+
 		cpu_buffer = buffer->buffers[cpu];
+		/* The CPU buffer may not have been initialized yet */
+		if (!cpu_buffer)
+			return;
 		rbwork = &cpu_buffer->irq_work;
 	}