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Benjamin Peterson 5496bf6890 perf trace: avoid garbage when not printing a trace event's arguments 
[ Upstream commit 5fb8e56542a3cf469fdf25d77f50e21cbff3ae7e ]

trace__fprintf_tp_fields may not print any tracepoint arguments. E.g., if the
argument values are all zero. Previously, this would result in a totally
uninitialized buffer being passed to fprintf, which could lead to garbage on the
console. Fix the problem by passing the number of initialized bytes fprintf.

Fixes: f11b2803bb88 ("perf trace: Allow choosing how to augment the tracepoint arguments")
Signed-off-by: Benjamin Peterson <benjamin@engflow.com>
Tested-by: Howard Chu <howardchu95@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: https://lore.kernel.org/r/20241103204816.7834-1-benjamin@engflow.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-12-17 13:24:12 +01:00
..
arch Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
bench Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Documentation Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
examples/bpf Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
include/bpf Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
jvmti Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pmu-events Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
python Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
scripts Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
tests Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
trace Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ui Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
util perf probe: Correct demangled symbols in C++ program 2024-12-17 13:24:11 +01:00
Build Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-annotate.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-bench.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-buildid-cache.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-buildid-list.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-c2c.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-config.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-data.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-diff.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-evlist.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-ftrace.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-help.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-inject.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-kallsyms.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-kmem.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-kvm.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-list.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-lock.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-mem.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-probe.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-record.c perf record: Fix possible incorrect free in record__switch_output() 2024-11-19 08:44:51 +01:00
builtin-report.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-sched.c Revert "perf sched timehist: Fix missing free of session in perf_sched__timehist()" 2024-11-24 00:23:22 +01:00
builtin-script.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-stat.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-timechart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-top.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin-trace.c perf trace: avoid garbage when not printing a trace event's arguments 2024-12-17 13:24:12 +01:00
builtin-version.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
builtin.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
check-headers.sh Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
command-list.txt Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
CREDITS Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
design.txt Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Makefile.config Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Makefile.perf Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
MANIFEST Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
perf-archive.sh Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
perf-completion.sh Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
perf-read-vdso.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
perf-sys.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
perf-with-kcore.sh Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
perf.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
perf.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00