From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Anders Roxell <anders.roxell@linaro.org>
Subject: [PATCH 4.19 12/13] perf map: Tighten snprintf() string precision to pass gcc check on some 32-bit arches
Date: Thu, 15 Apr 2021 16:48:01 +0200 [thread overview]
Message-ID: <20210415144412.000369809@linuxfoundation.org> (raw)
In-Reply-To: <20210415144411.596695196@linuxfoundation.org>
From: Arnaldo Carvalho de Melo <acme@redhat.com>
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>
---
tools/perf/util/map.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -88,8 +88,7 @@ static inline bool replace_android_lib(c
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");
@@ -117,8 +116,8 @@ static inline bool replace_android_lib(c
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;
}
next prev parent reply other threads:[~2021-04-15 15:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-15 14:47 [PATCH 4.19 00/13] 4.19.188-rc1 review Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 4.19 01/13] KVM: arm64: Hide system instruction access to Trace registers Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 4.19 02/13] KVM: arm64: Disable guest access to trace filter controls Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 4.19 03/13] drm/imx: imx-ldb: fix out of bounds array access warning Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 4.19 04/13] gfs2: report "already frozen/thawed" errors Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 4.19 05/13] drm/tegra: dc: Dont set PLL clock to 0Hz Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 4.19 06/13] block: only update parent bi_status when bio fail Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 4.19 07/13] riscv,entry: fix misaligned base for excp_vect_table Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 4.19 08/13] net: phy: broadcom: Only advertise EEE for supported modes Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 4.19 09/13] staging: m57621-mmc: delete driver from the tree Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 4.19 10/13] netfilter: x_tables: fix compat match/target pad out-of-bound write Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 4.19 11/13] driver core: Fix locking bug in deferred_probe_timeout_work_func() Greg Kroah-Hartman
2021-04-15 14:48 ` Greg Kroah-Hartman [this message]
2021-04-15 14:48 ` [PATCH 4.19 13/13] xen/events: fix setting irq affinity Greg Kroah-Hartman
2021-04-15 19:13 ` [PATCH 4.19 00/13] 4.19.188-rc1 review Pavel Machek
2021-04-15 22:43 ` Shuah Khan
2021-04-16 9:49 ` Naresh Kamboju
2021-04-16 9:52 ` Samuel Zou
2021-04-16 20:01 ` Sudip Mukherjee
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