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Update to tracing histogram variable string copy

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A fix to only copy the size of the field to the histogram string
 did not take into account that the size can be larger than the
 storage.
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Merge tag 'trace-v5.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fix from Steven Rostedt:
 "Update to tracing histogram variable string copy

  A fix to only copy the size of the field to the histogram string did
  not take into account that the size can be larger than the storage"

* tag 'trace-v5.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Add length protection to histogram string copies
This commit is contained in:
Linus Torvalds 2021-11-14 19:07:19 -08:00
commit 8ab7745879
2 changed files with 8 additions and 3 deletions
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2
include/linux/trace_events.h
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@ -673,7 +673,7 @@ struct trace_event_file {
#define PERF_MAX_TRACE_SIZE 8192
#define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */
#define MAX_FILTER_STR_VAL 256U /* Should handle KSYM_SYMBOL_LEN */
enum event_trigger_type {
ETT_NONE = (0),