From: Arnaldo Carvalho de Melo acme@redhat.com
commit b6313899f4ed2e76b8375cf8069556f5b94fbff0 upstream.
Since we make sure the destination buffer has at least strlen(orig) + 1, no need to do a strncpy(dest, orig, strlen(orig)), just use strcpy(dest, orig).
This silences this gcc 8.2 warning on Alpine Linux:
In function 'add_man_viewer', inlined from 'perf_help_config' at builtin-help.c:284:3: builtin-help.c:192:2: error: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Werror=stringop-truncation] strncpy((*p)->name, name, len); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ builtin-help.c: In function 'perf_help_config': builtin-help.c:187:15: note: length computed here size_t len = strlen(name); ^~~~~~~~~~~~
Cc: Adrian Hunter adrian.hunter@intel.com Cc: Jiri Olsa jolsa@kernel.org Cc: Namhyung Kim namhyung@kernel.org Fixes: 078006012401 ("perf_counter tools: add in basic glue from Git") Link: https://lkml.kernel.org/n/tip-2f69l7drca427ob4km8i7kvo@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- tools/perf/builtin-help.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/perf/builtin-help.c +++ b/tools/perf/builtin-help.c @@ -186,7 +186,7 @@ static void add_man_viewer(const char *n while (*p) p = &((*p)->next); *p = zalloc(sizeof(**p) + len + 1); - strncpy((*p)->name, name, len); + strcpy((*p)->name, name); }
static int supported_man_viewer(const char *name, size_t len)