diff options
-rw-r--r-- | kernel/trace/trace_functions_graph.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index d2249abafb53..420ec3487579 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c | |||
@@ -843,9 +843,16 @@ print_graph_function(struct trace_iterator *iter) | |||
843 | 843 | ||
844 | switch (entry->type) { | 844 | switch (entry->type) { |
845 | case TRACE_GRAPH_ENT: { | 845 | case TRACE_GRAPH_ENT: { |
846 | struct ftrace_graph_ent_entry *field; | 846 | /* |
847 | * print_graph_entry() may consume the current event, | ||
848 | * thus @field may become invalid, so we need to save it. | ||
849 | * sizeof(struct ftrace_graph_ent_entry) is very small, | ||
850 | * it can be safely saved at the stack. | ||
851 | */ | ||
852 | struct ftrace_graph_ent_entry *field, saved; | ||
847 | trace_assign_type(field, entry); | 853 | trace_assign_type(field, entry); |
848 | return print_graph_entry(field, s, iter); | 854 | saved = *field; |
855 | return print_graph_entry(&saved, s, iter); | ||
849 | } | 856 | } |
850 | case TRACE_GRAPH_RET: { | 857 | case TRACE_GRAPH_RET: { |
851 | struct ftrace_graph_ret_entry *field; | 858 | struct ftrace_graph_ret_entry *field; |