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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-03-05 10:02:09 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-16 11:59:12 +0200 |
| commit | c423f186b6d712ab720c7535ba89de43aeffacd0 (patch) | |
| tree | 8ede00500d62e48758d75d3551d6b4c3f11c6f44 /tools | |
| parent | 0c58c9f9c5c5326320bbe0429a0f45fc1b92024b (diff) | |
| download | linux-rt-c423f186b6d712ab720c7535ba89de43aeffacd0.tar.gz | |
perf map: Tighten snprintf() string precision to pass gcc check on some 32-bit arches
commit 77d02bd00cea9f1a87afe58113fa75b983d6c23a upstream.
Noticed on a debian:experimental mips and mipsel cross build build
environment:
perfbuilder@ec265a086e9b:~$ mips-linux-gnu-gcc --version | head -1
mips-linux-gnu-gcc (Debian 10.2.1-3) 10.2.1 20201224
perfbuilder@ec265a086e9b:~$
CC /tmp/build/perf/util/map.o
util/map.c: In function 'map__new':
util/map.c:109:5: error: '%s' directive output may be truncated writing between 1 and 2147483645 bytes into a region of size 4096 [-Werror=format-truncation=]
109 | "%s/platforms/%s/arch-%s/usr/lib/%s",
| ^~
In file included from /usr/mips-linux-gnu/include/stdio.h:867,
from util/symbol.h:11,
from util/map.c:2:
/usr/mips-linux-gnu/include/bits/stdio2.h:67:10: note: '__builtin___snprintf_chk' output 32 or more bytes (assuming 4294967321) into a destination of size 4096
67 | return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
68 | __bos (__s), __fmt, __va_arg_pack ());
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
Since we have the lenghts for what lands in that place, use it to give
the compiler more info and make it happy.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/map.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index ab8ebfa2159d..2593b7c28de7 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -91,8 +91,7 @@ static inline bool replace_android_lib(const char *filename, char *newfilename) if (!strncmp(filename, "/system/lib/", 12)) { char *ndk, *app; const char *arch; - size_t ndk_length; - size_t app_length; + int ndk_length, app_length; ndk = getenv("NDK_ROOT"); app = getenv("APP_PLATFORM"); @@ -120,8 +119,8 @@ static inline bool replace_android_lib(const char *filename, char *newfilename) if (new_length > PATH_MAX) return false; snprintf(newfilename, new_length, - "%s/platforms/%s/arch-%s/usr/lib/%s", - ndk, app, arch, libname); + "%.*s/platforms/%.*s/arch-%s/usr/lib/%s", + ndk_length, ndk, app_length, app, arch, libname); return true; } |