From nobody Wed Oct 8 14:40:53 2025 Received: from mail-pg1-f201.google.com (mail-pg1-f201.google.com [209.85.215.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB5BA22127B for ; Sat, 28 Jun 2025 04:50:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751086248; cv=none; b=ZrE9+gWdr5emW/utvwC2cXqsybKOW92xJW3Mxp/mYWMlVPAEWQI2vEMuEhOqQtF5/rJPtDZuejQZoWmclBfW00zNQdFJf9R2/QeRdoQhlYh5gE3vQmnu8n5jrSbcTPk3seFvrEsfXJuaI2XI1vF7EFYc/Yv3m874De1iBHjwVT4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751086248; c=relaxed/simple; bh=Rls+OYEH+weNr8mgfAzavaCxy7juMyRMm0AYcaMJ00I=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=JGX82ySWO98YIIQXPuy59mgOrU092wNKXMMslO8KQk8qMR1hE9cWM6WAEwPZVKfY2maOIzQyF3bT+11KX+hidwE9pG6i66ktMK6xBHBRTsjiHCNi+m/lG9bM2Srf8DudlqpRqsOU4M0+8kpc/AasRcshonoBQQ+7w2q+hOwKx54= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=Rzk4zldW; arc=none smtp.client-ip=209.85.215.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Rzk4zldW" Received: by mail-pg1-f201.google.com with SMTP id 41be03b00d2f7-b2c37558eccso2349218a12.1 for ; Fri, 27 Jun 2025 21:50:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1751086246; x=1751691046; darn=vger.kernel.org; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=BhNgR0jggEgPcm92nWMts4STCtLu+unFNFe51p41/ks=; b=Rzk4zldWyqN5YdiMfxcRsExKkUz15E86mj5+RTmdMq6FMhLQ3k1gUWxnJ3/h9PAQUW aZuU8idY8RPkt+xneCCtXvN7kfMu8fMnGHfYCb7cmMoUSaIcZehz6C3H6RXn2O1TXs9U FnGN/eDt/QnGp4+zBtrE4Z/g7pQyWDufx9uRvqlDp2Mrd6x16Br44Wf6xaWSqPm4IMD0 skMjORLMiNMjUCxHSJTiWwirimGQYnlIZdQz8B7QEjivDPxzoex/K+lVmmXV7b8j8k4m kVbj3/GJXDoqLy2qWfs9JvXXURyRzm/qxNihp9gEJ9iYIoTJzS/CquVafT/pYStrPQqR qbXQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751086246; x=1751691046; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=BhNgR0jggEgPcm92nWMts4STCtLu+unFNFe51p41/ks=; b=CBGT8CYnk8ffDjNzMauz3zf7X6pR3/5Tc6TpRVlbK/4msEXu2uKAMurp1LD62JdU6x A8rrUPLH+qI1Gp9KgNYFVttcVv0+C4sVm29A3pjbBfmioVc2xhlr40ZeJcq1KyT8CLv4 +zE2wOJ9MMYA0F0TAppYOr0ARqQY9omBrdoXjxjkdRUgD44AfNnA+Zsu2hAWe5hzgEML IEPSFza0VqFQ4yG0Rg18t9F4vECrI3BSNiQh++BoONE5qWxd665Ec9gS2JdIA4j9QVQK w5X/olNG3G6+FMT79VRpcIyKk2laiNrPtDMuuGIHXHZrxtrU9tptlcC+ZOhiD3ZrShwG SoqQ== X-Forwarded-Encrypted: i=1; AJvYcCVTHdOh+5ocSSHXHZNiR2AJNuDkerGzvqBElz48KONKqiiJUJpYkdd1CIe3FXNp6YfOY3n6sAJ5eyPtrtQ=@vger.kernel.org X-Gm-Message-State: AOJu0YwtlE/RUe7yxrFsIc7ZeROf+tj29j0Hzbiu52pTBbqBr2fgMN1N ngrNMYdrHyn5YhhqiBuv1HPosj9R422U4NJHHDHEeGIfva4f/hIm2mLU4iE4HKDQ9I5yLcz6s3c zzNO5cCSsIg== X-Google-Smtp-Source: AGHT+IHGSP8ghcsLex9rV/DWu974KETLxAJzRGhz0EHAcVyp++M48UPOe4csSadruYBpQcd/oR/J5NXfKFOV X-Received: from pfve20.prod.google.com ([2002:a05:6a00:1a94:b0:746:2ceb:2ec0]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:7350:b0:220:5fd4:a882 with SMTP id adf61e73a8af0-220a16c8c73mr7991271637.33.1751086244124; Fri, 27 Jun 2025 21:50:44 -0700 (PDT) Date: Fri, 27 Jun 2025 21:49:59 -0700 In-Reply-To: <20250628045017.1361563-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250628045017.1361563-1-irogers@google.com> X-Mailer: git-send-email 2.50.0.727.gbf7dc18ff4-goog Message-ID: <20250628045017.1361563-6-irogers@google.com> Subject: [PATCH v5 05/23] perf build-id: Ensure struct build_id is empty before use From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , John Garry , Will Deacon , James Clark , Mike Leach , Leo Yan , "Masami Hiramatsu (Google)" , Ravi Bangoria , Charlie Jenkins , Colin Ian King , Andi Kleen , Dmitry Vyukov , Graham Woodward , Ilkka Koskinen , Zhongqiu Han , Yicong Yang , Athira Rajeev , Kajol Jain , Li Huafei , "Steinar H. Gunderson" , Stephen Brennan , Chun-Tse Shao , Yujie Liu , "Dr. David Alan Gilbert" , Levi Yun , Howard Chu , Weilin Wang , Thomas Falcon , Matt Fleming , Veronika Molnarova , "=?UTF-8?q?Krzysztof=20=C5=81opatowski?=" , Zixian Cai , Steve Clevenger , Ben Gainey , Chaitanya S Prakash , Martin Liska , "=?UTF-8?q?Martin=20Li=C5=A1ka?=" , Song Liu , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" If a build ID is read then not all code paths may ensure it is empty before use. Initialize the build_id to be zero-ed unless there is clear initialization such as a call to build_id__init. Signed-off-by: Ian Rogers --- tools/perf/bench/inject-buildid.c | 2 +- tools/perf/builtin-buildid-cache.c | 8 ++++---- tools/perf/tests/pe-file-parsing.c | 2 +- tools/perf/tests/sdt.c | 2 +- tools/perf/util/build-id.c | 6 +++--- tools/perf/util/debuginfo.c | 2 +- tools/perf/util/probe-event.c | 3 ++- tools/perf/util/probe-finder.c | 3 ++- tools/perf/util/symbol-minimal.c | 2 +- tools/perf/util/symbol.c | 5 +++-- tools/perf/util/synthetic-events.c | 2 +- 11 files changed, 20 insertions(+), 17 deletions(-) diff --git a/tools/perf/bench/inject-buildid.c b/tools/perf/bench/inject-bu= ildid.c index f55c07e4be94..aad572a78d7f 100644 --- a/tools/perf/bench/inject-buildid.c +++ b/tools/perf/bench/inject-buildid.c @@ -80,7 +80,7 @@ static int add_dso(const char *fpath, const struct stat *= sb __maybe_unused, int typeflag, struct FTW *ftwbuf __maybe_unused) { struct bench_dso *dso =3D &dsos[nr_dsos]; - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; =20 if (typeflag =3D=3D FTW_D || typeflag =3D=3D FTW_SL) return 0; diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildi= d-cache.c index 3f7739b21148..e936a34b7d37 100644 --- a/tools/perf/builtin-buildid-cache.c +++ b/tools/perf/builtin-buildid-cache.c @@ -175,7 +175,7 @@ static int build_id_cache__add_kcore(const char *filena= me, bool force) static int build_id_cache__add_file(const char *filename, struct nsinfo *n= si) { char sbuild_id[SBUILD_ID_SIZE]; - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; int err; struct nscookie nsc; =20 @@ -198,7 +198,7 @@ static int build_id_cache__add_file(const char *filenam= e, struct nsinfo *nsi) static int build_id_cache__remove_file(const char *filename, struct nsinfo= *nsi) { char sbuild_id[SBUILD_ID_SIZE]; - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; struct nscookie nsc; =20 int err; @@ -275,7 +275,7 @@ static int build_id_cache__purge_all(void) static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_u= nused) { char filename[PATH_MAX]; - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; =20 if (!dso__build_id_filename(dso, filename, sizeof(filename), false)) return true; @@ -303,7 +303,7 @@ static int build_id_cache__fprintf_missing(struct perf_= session *session, FILE *f static int build_id_cache__update_file(const char *filename, struct nsinfo= *nsi) { char sbuild_id[SBUILD_ID_SIZE]; - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; struct nscookie nsc; =20 int err; diff --git a/tools/perf/tests/pe-file-parsing.c b/tools/perf/tests/pe-file-= parsing.c index fff58b220c07..30c7da79e109 100644 --- a/tools/perf/tests/pe-file-parsing.c +++ b/tools/perf/tests/pe-file-parsing.c @@ -24,7 +24,7 @@ static int run_dir(const char *d) { char filename[PATH_MAX]; char debugfile[PATH_MAX]; - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; char debuglink[PATH_MAX]; char expect_build_id[] =3D { 0x5a, 0x0f, 0xd8, 0x82, 0xb5, 0x30, 0x84, 0x22, diff --git a/tools/perf/tests/sdt.c b/tools/perf/tests/sdt.c index 919712899251..de4c7916b40d 100644 --- a/tools/perf/tests/sdt.c +++ b/tools/perf/tests/sdt.c @@ -28,7 +28,7 @@ static int target_function(void) static int build_id_cache__add_file(const char *filename) { char sbuild_id[SBUILD_ID_SIZE]; - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; int err; =20 err =3D filename__read_build_id(filename, &bid); diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c index 3386fa8e1e7e..1abd5a670665 100644 --- a/tools/perf/util/build-id.c +++ b/tools/perf/util/build-id.c @@ -95,7 +95,7 @@ int build_id__snprintf(const struct build_id *build_id, c= har *bf, size_t bf_size int sysfs__snprintf_build_id(const char *root_dir, char *sbuild_id, size_t= sbuild_id_size) { char notes[PATH_MAX]; - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; int ret; =20 if (!root_dir) @@ -112,7 +112,7 @@ int sysfs__snprintf_build_id(const char *root_dir, char= *sbuild_id, size_t sbuil =20 int filename__snprintf_build_id(const char *pathname, char *sbuild_id, siz= e_t sbuild_id_size) { - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; int ret; =20 ret =3D filename__read_build_id(pathname, &bid); @@ -849,7 +849,7 @@ static int filename__read_build_id_ns(const char *filen= ame, =20 static bool dso__build_id_mismatch(struct dso *dso, const char *name) { - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; bool ret =3D false; =20 mutex_lock(dso__lock(dso)); diff --git a/tools/perf/util/debuginfo.c b/tools/perf/util/debuginfo.c index b5deea7cbdf2..a44c70f93156 100644 --- a/tools/perf/util/debuginfo.c +++ b/tools/perf/util/debuginfo.c @@ -103,7 +103,7 @@ struct debuginfo *debuginfo__new(const char *path) char buf[PATH_MAX], nil =3D '\0'; struct dso *dso; struct debuginfo *dinfo =3D NULL; - struct build_id bid; + struct build_id bid =3D { .size =3D 0}; =20 /* Try to open distro debuginfo files */ dso =3D dso__new(path); diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 307ad6242a4e..3c87aa6f7d3b 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -1063,7 +1063,6 @@ static int sprint_line_description(char *sbuf, size_t= size, struct line_range *l static int __show_line_range(struct line_range *lr, const char *module, bool user) { - struct build_id bid; int l =3D 1; struct int_node *ln; struct debuginfo *dinfo; @@ -1088,6 +1087,8 @@ static int __show_line_range(struct line_range *lr, c= onst char *module, ret =3D -ENOENT; } if (dinfo->build_id) { + struct build_id bid; + build_id__init(&bid, dinfo->build_id, BUILD_ID_SIZE); build_id__sprintf(&bid, sbuild_id); } diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index 3cc7c40f5097..1bbb91758316 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -848,7 +848,6 @@ static int probe_point_lazy_walker(const char *fname, i= nt lineno, /* Find probe points from lazy pattern */ static int find_probe_point_lazy(Dwarf_Die *sp_die, struct probe_finder *p= f) { - struct build_id bid; char sbuild_id[SBUILD_ID_SIZE] =3D ""; int ret =3D 0; char *fpath; @@ -858,6 +857,8 @@ static int find_probe_point_lazy(Dwarf_Die *sp_die, str= uct probe_finder *pf) =20 comp_dir =3D cu_get_comp_dir(&pf->cu_die); if (pf->dbg->build_id) { + struct build_id bid; + build_id__init(&bid, pf->dbg->build_id, BUILD_ID_SIZE); build_id__sprintf(&bid, sbuild_id); } diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-mini= mal.c index c73fe2e09fe9..7201494c5c20 100644 --- a/tools/perf/util/symbol-minimal.c +++ b/tools/perf/util/symbol-minimal.c @@ -317,7 +317,7 @@ int dso__load_sym(struct dso *dso, struct map *map __ma= ybe_unused, struct symsrc *runtime_ss __maybe_unused, int kmodule __maybe_unused) { - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; int ret; =20 ret =3D fd__is_64_bit(ss->fd); diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index ea86a6253f04..0fe227d32b98 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1812,7 +1812,6 @@ int dso__load(struct dso *dso, struct map *map) struct symsrc *syms_ss =3D NULL, *runtime_ss =3D NULL; bool kmod; bool perfmap; - struct build_id bid; struct nscookie nsc; char newmapname[PATH_MAX]; const char *map_path =3D dso__long_name(dso); @@ -1873,6 +1872,8 @@ int dso__load(struct dso *dso, struct map *map) */ if (!dso__has_build_id(dso) && is_regular_file(dso__long_name(dso))) { + struct build_id bid =3D { .size =3D 0, }; + __symbol__join_symfs(name, PATH_MAX, dso__long_name(dso)); if (filename__read_build_id(name, &bid) > 0) dso__set_build_id(dso, &bid); @@ -2121,7 +2122,7 @@ static bool filename__readable(const char *file) =20 static char *dso__find_kallsyms(struct dso *dso, struct map *map) { - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; char sbuild_id[SBUILD_ID_SIZE]; bool is_host =3D false; char path[PATH_MAX]; diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic= -events.c index 68bb7c5fe1b1..b7ebee95536f 100644 --- a/tools/perf/util/synthetic-events.c +++ b/tools/perf/util/synthetic-events.c @@ -368,7 +368,7 @@ static void perf_record_mmap2__read_build_id(struct per= f_record_mmap2 *event, struct machine *machine, bool is_kernel) { - struct build_id bid; + struct build_id bid =3D { .size =3D 0, }; struct nsinfo *nsi; struct nscookie nc; struct dso *dso =3D NULL; --=20 2.50.0.727.gbf7dc18ff4-goog