diff options
| -rw-r--r-- | kernel/trace/trace_events_hist.c | 37 |
1 files changed, 32 insertions, 5 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 7bcc32a7e266..7e88daae85b6 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -5162,7 +5162,7 @@ static int event_hist_trigger_func(struct event_command *cmd_ops, struct synth_event *se; const char *se_name; bool remove = false; - char *trigger; + char *trigger, *p; int ret = 0; if (!param) @@ -5171,10 +5171,37 @@ static int event_hist_trigger_func(struct event_command *cmd_ops, if (glob[0] == '!') remove = true; - /* separate the trigger from the filter (k:v [if filter]) */ - trigger = strsep(¶m, " \t"); - if (!trigger) - return -EINVAL; + /* + * separate the trigger from the filter (k:v [if filter]) + * allowing for whitespace in the trigger + */ + p = trigger = param; + do { + p = strstr(p, "if"); + if (!p) + break; + if (p == param) + return -EINVAL; + if (*(p - 1) != ' ' && *(p - 1) != '\t') { + p++; + continue; + } + if (p >= param + strlen(param) - strlen("if") - 1) + return -EINVAL; + if (*(p + strlen("if")) != ' ' && *(p + strlen("if")) != '\t') { + p++; + continue; + } + break; + } while (p); + + if (!p) + param = NULL; + else { + *(p - 1) = '\0'; + param = strstrip(p); + trigger = strstrip(trigger); + } attrs = parse_hist_trigger_attrs(trigger); if (IS_ERR(attrs)) |