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| author |   Arnd Bergmann <arnd@arndb.de> | 2018-03-28 16:09:10 +0200 |
|---|---|---|
| committer |   Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-07-03 18:14:39 -0400 |
| commit | cf4d418e653afc84c9c873236033e06be5d58f1c (patch) | |
| tree | a4b635c35a366aee31cbb33964701ed2faaece5b /kernel/trace/trace_events_hist.c | |
| parent | Linux 4.18-rc3 (diff) | |
| download | linux-dev-cf4d418e653afc84c9c873236033e06be5d58f1c.tar.xz linux-dev-cf4d418e653afc84c9c873236033e06be5d58f1c.zip | |
tracing: Avoid string overflow
'err' is used as a NUL-terminated string, but using strncpy() with the length
equal to the buffer size may result in lack of the termination:
kernel/trace/trace_events_hist.c: In function 'hist_err_event':
kernel/trace/trace_events_hist.c:396:3: error: 'strncpy' specified bound 256 equals destination size [-Werror=stringop-truncation]
strncpy(err, var, MAX_FILTER_STR_VAL);
This changes it to use the safer strscpy() instead.
Link: http://lkml.kernel.org/r/20180328140920.2842153-1-arnd@arndb.de
Cc: stable@vger.kernel.org
Fixes: f404da6e1d46 ("tracing: Add 'last error' error facility for hist triggers")
Acked-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_events_hist.c')
| -rw-r--r-- | kernel/trace/trace_events_hist.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 046c716a6536..aae18af94c94 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -393,7 +393,7 @@ static void hist_err_event(char *str, char *system, char *event, char *var) else if (system) snprintf(err, MAX_FILTER_STR_VAL, "%s.%s", system, event); else - strncpy(err, var, MAX_FILTER_STR_VAL); + strscpy(err, var, MAX_FILTER_STR_VAL); hist_err(str, err); } |