From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>, Thomas Gleixner <tglx@linutronix.de>
Cc: Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Clark Williams <williams@redhat.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Jiri Olsa <jolsa@redhat.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Ben Gainey <ben.gainey@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
Stephane Eranian <eranian@google.com>
Subject: [PATCH 30/85] perf jvmti: Address gcc string overflow warning for strncpy()
Date: Tue, 11 Jun 2019 15:58:16 -0300 [thread overview]
Message-ID: <20190611185911.11645-31-acme@kernel.org> (raw)
In-Reply-To: <20190611185911.11645-1-acme@kernel.org>
From: Jiri Olsa <jolsa@redhat.com>
We are getting false positive gcc warning when we compile with gcc9 (9.1.1):
CC jvmti/libjvmti.o
In file included from /usr/include/string.h:494,
from jvmti/libjvmti.c:5:
In function ‘strncpy’,
inlined from ‘copy_class_filename.constprop’ at jvmti/libjvmti.c:166:3:
/usr/include/bits/string_fortified.h:106:10: error: ‘__builtin_strncpy’ specified bound depends on the length of the source argument [-Werror=stringop-overflow=]
106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jvmti/libjvmti.c: In function ‘copy_class_filename.constprop’:
jvmti/libjvmti.c:165:26: note: length computed here
165 | size_t file_name_len = strlen(file_name);
| ^~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
As per Arnaldo's suggestion use strlcpy(), which does the same thing and keeps
gcc silent.
Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ben Gainey <ben.gainey@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190531131321.GB1281@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/jvmti/libjvmti.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/jvmti/libjvmti.c b/tools/perf/jvmti/libjvmti.c
index aea7b1fe85aa..c441a34cb1c0 100644
--- a/tools/perf/jvmti/libjvmti.c
+++ b/tools/perf/jvmti/libjvmti.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
+#include <linux/string.h>
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
@@ -162,8 +163,7 @@ copy_class_filename(const char * class_sign, const char * file_name, char * resu
result[i] = '\0';
} else {
/* fallback case */
- size_t file_name_len = strlen(file_name);
- strncpy(result, file_name, file_name_len < max_length ? file_name_len : max_length);
+ strlcpy(result, file_name, max_length);
}
}
--
2.20.1
next prev parent reply other threads:[~2019-06-11 19:01 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-11 18:57 [GIT PULL] perf/core improvements and fixes Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 01/85] perf data: Add description of header HEADER_BPF_PROG_INFO and HEADER_BPF_BTF Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 02/85] perf data: Document memory topology header: HEADER_MEM_TOPOLOGY Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 03/85] perf data: Document clockid header: HEADER_CLOCKID Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 04/85] perf data: Document directory format header: HEADER_DIR_FORMAT Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 05/85] perf symbols: Remove unused variable 'err' Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 06/85] perf record: Allow mixing --user-regs with --call-graph=dwarf Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 07/85] perf intel-pt: Factor out intel_pt_update_sample_time Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 08/85] perf intel-pt: Accumulate cycle count from CYC packets Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 09/85] perf tools: Add IPC information to perf_sample Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 10/85] perf intel-pt: Add support for samples to contain IPC ratio Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 11/85] perf script: Add output of " Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 12/85] perf intel-pt: Record when decoding PSB+ packets Arnaldo Carvalho de Melo
2019-06-11 18:57 ` [PATCH 13/85] perf intel-pt: Re-factor TIP cases in intel_pt_walk_to_ip Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 14/85] perf intel-pt: Accumulate cycle count from TSC/TMA/MTC packets Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 15/85] perf intel-pt: Document IPC usage Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 16/85] perf thread-stack: Accumulate IPC information Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 17/85] perf db-export: Add brief documentation Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 18/85] perf db-export: Export IPC information Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 19/85] perf scripts python: export-to-sqlite.py: " Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 20/85] perf scripts python: export-to-postgresql.py: " Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 21/85] perf scripts python: exported-sql-viewer.py: Add IPC information to the Branch reports Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 22/85] perf scripts python: exported-sql-viewer.py: Add CallGraphModelParams Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 23/85] perf scripts python: exported-sql-viewer.py: Add IPC information to Call Graph Graph Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 24/85] perf scripts python: exported-sql-viewer.py: Add IPC information to Call Tree Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 25/85] perf scripts python: exported-sql-viewer.py: Select find text when find bar is activated Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 26/85] perf augmented_raw_syscalls: Tell which args are filenames and how many bytes to copy Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 27/85] perf augmented_raw_syscalls: Move the probe_read_str to a separate function Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 28/85] perf augmented_raw_syscalls: Change helper to consider just the augmented_filename part Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 29/85] perf augmented_raw_syscalls: Move reading filename to the loop Arnaldo Carvalho de Melo
2019-06-11 18:58 ` Arnaldo Carvalho de Melo [this message]
2019-06-11 18:58 ` [PATCH 31/85] perf trace: Consume the augmented_raw_syscalls payload Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 32/85] perf trace: Associate more argument names with the filename beautifier Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 33/85] perf trace: Exit when failing to build eBPF program Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 34/85] perf config: Bail out when a handler returns failure for a key-value pair Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 35/85] perf record: Add support to collect callchains from kernel or user space only Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 36/85] perf evsel: Remove superfluous nthreads system_wide setup in alloc_fd() Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 37/85] perf cs-etm: Configure contextID tracing in CPU-wide mode Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 38/85] perf cs-etm: Configure timestamp generation " Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 39/85] perf cs-etm: Configure SWITCH_EVENTS " Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 40/85] perf cs-etm: Add handling of itrace start events Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 41/85] perf cs-etm: Add handling of switch-CPU-wide events Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 42/85] perf cs-etm: Refactor error path in cs_etm_decoder__new() Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 43/85] perf cs-etm: Move packet queue out of decoder structure Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 44/85] perf cs-etm: Fix indentation in function cs_etm__process_decoder_queue() Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 45/85] perf cs-etm: Introduce the concept of trace ID queues Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 46/85] perf cs-etm: Get rid of unused cpu in struct cs_etm_queue Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 47/85] perf cs-etm: Move thread to traceid_queue Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 48/85] perf cs-etm: Move tid/pid " Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 49/85] perf cs-etm: Use traceID aware memory callback API Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 50/85] perf cs-etm: Add support for multiple traceID queues Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 51/85] perf cs-etm: Linking PE contextID with perf thread mechanic Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 52/85] perf cs-etm: Add notion of time to decoding code Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 53/85] perf cs-etm: Add support for CPU-wide trace scenarios Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 54/85] perf cpumap: Retrieve die id information Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 55/85] perf header: Add die information in CPU topology Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 56/85] perf stat: Support per-die aggregation Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 57/85] perf header: Rename "sibling cores" to "sibling sockets" Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 58/85] perf tools: Apply new CPU topology sysfs attributes Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 59/85] perf data: Fix perf.data documentation for HEADER_CPU_TOPOLOGY Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 60/85] perf cs-etm: Properly set the value of 'old' and 'head' in snapshot mode Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 61/85] perf cs-etm: Remove duplicate GENMASK() define, use linux/bits.h instead Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 62/85] perf config: Update default value for llvm.clang-bpf-cmd-template Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 63/85] perf auxtrace: Add perf time interval to itrace_synth_ops Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 64/85] perf script: Set perf time interval in itrace_synth_ops Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 65/85] perf report: " Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 66/85] perf intel-pt: Add lookahead callback Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 67/85] perf intel-pt: Factor out intel_pt_8b_tsc() Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 68/85] perf intel-pt: Factor out intel_pt_reposition() Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 69/85] perf intel-pt: Add reposition parameter to intel_pt_get_data() Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 70/85] perf intel-pt: Add intel_pt_fast_forward() Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 71/85] perf intel-pt: Factor out intel_pt_get_buffer() Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 72/85] perf intel-pt: Add support for lookahead Arnaldo Carvalho de Melo
2019-06-11 18:58 ` [PATCH 73/85] perf intel-pt: Add support for efficient time interval filtering Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 74/85] perf time-utils: Treat time ranges consistently Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 75/85] perf time-utils: Factor out set_percent_time() Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 76/85] perf time-utils: Prevent percentage time range overlap Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 77/85] perf time-utils: Fix --time documentation Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 78/85] perf time-utils: Simplify perf_time__parse_for_ranges() error paths slightly Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 79/85] perf time-utils: Make perf_time__parse_for_ranges() more logical Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 80/85] perf tests: Add a test for time-utils Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 81/85] perf time-utils: Add support for multiple explicit time intervals Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 82/85] perf test 6: Fix missing kvm module load for s390 Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 83/85] perf report: Fix OOM error in TUI mode on s390 Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 84/85] perf report: Support s390 diag event display on x86 Arnaldo Carvalho de Melo
2019-06-11 18:59 ` [PATCH 85/85] perf trace: Skip unknown syscalls when expanding strace like syscall groups Arnaldo Carvalho de Melo
2019-06-17 18:48 ` [GIT PULL] perf/core improvements and fixes Ingo Molnar
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