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Three tracing fixes:

Browse Source 
- Make local osnoise_instances static
 
  - Copy just actual size of histogram strings
 
  - Properly check missing operands in histogram expressions
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Merge tag 'trace-v5.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Three tracing fixes:

   - Make local osnoise_instances static

   - Copy just actual size of histogram strings

   - Properly check missing operands in histogram expressions"

* tag 'trace-v5.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing/histogram: Fix check for missing operands in an expression
  tracing/histogram: Do not copy the fixed-size char array field over the field size
  tracing/osnoise: Make osnoise_instances static
This commit is contained in:
Linus Torvalds 2021-11-13 10:11:51 -08:00
commit 7c3737c706
2 changed files with 9 additions and 6 deletions
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12
kernel/trace/trace_events_hist.c
View File

@ -1953,9 +1953,10 @@ static struct hist_field *create_hist_field(struct hist_trigger_data *hist_data,
if (!hist_field->type)
goto free;
if (field->filter_type == FILTER_STATIC_STRING)
if (field->filter_type == FILTER_STATIC_STRING) {
hist_field->fn = hist_field_string;
else if (field->filter_type == FILTER_DYN_STRING)
hist_field->size = field->size;
} else if (field->filter_type == FILTER_DYN_STRING)
hist_field->fn = hist_field_dynstring;
else
hist_field->fn = hist_field_pstring;
@ -2580,7 +2581,8 @@ static struct hist_field *parse_expr(struct hist_trigger_data *hist_data,
operand1_str = str;
str = sep+1;
if (!operand1_str || !str)
/* Binary operator requires both operands */
if (*operand1_str == '\0' || *str == '\0')
goto free;
operand_flags = 0;
@ -3025,7 +3027,7 @@ static inline void __update_field_vars(struct tracing_map_elt *elt,
char *str = elt_data->field_var_str[j++];
char *val_str = (char *)(uintptr_t)var_val;
strscpy(str, val_str, STR_VAR_LEN_MAX);
strscpy(str, val_str, val->size);
var_val = (u64)(uintptr_t)str;
}
tracing_map_set_var(elt, var_idx, var_val);
@ -4920,7 +4922,7 @@ static void hist_trigger_elt_update(struct hist_trigger_data *hist_data,
str = elt_data->field_var_str[idx];
val_str = (char *)(uintptr_t)hist_val;
strscpy(str, val_str, STR_VAR_LEN_MAX);
strscpy(str, val_str, hist_field->size);
hist_val = (u64)(uintptr_t)str;
}

3
kernel/trace/trace_osnoise.c
View File

@ -55,7 +55,8 @@ struct osnoise_instance {
struct list_head list;
struct trace_array *tr;
};
struct list_head osnoise_instances;
static struct list_head osnoise_instances;
static bool osnoise_has_registered_instances(void)
{