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Subject[PATCH 5.10 358/530] bpftool: Fix maybe-uninitialized warnings
Date
From: Andrii Nakryiko <andrii@kernel.org>

[ Upstream commit 4bbb3583687051ef99966ddaeb1730441b777d40 ]

Somehow when bpftool is compiled in -Og mode, compiler produces new warnings
about possibly uninitialized variables. Fix all the reported problems.

Fixes: 2119f2189df1 ("bpftool: add C output format option to btf dump subcommand")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210313210920.1959628-3-andrii@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/bpf/bpftool/btf.c | 3 +++
tools/bpf/bpftool/main.c | 3 +--
tools/bpf/bpftool/map.c | 2 +-
3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
index 2afb7d5b1aca..592803af9734 100644
--- a/tools/bpf/bpftool/btf.c
+++ b/tools/bpf/bpftool/btf.c
@@ -519,6 +519,7 @@ static int do_dump(int argc, char **argv)
NEXT_ARG();
if (argc < 1) {
p_err("expecting value for 'format' option\n");
+ err = -EINVAL;
goto done;
}
if (strcmp(*argv, "c") == 0) {
@@ -528,11 +529,13 @@ static int do_dump(int argc, char **argv)
} else {
p_err("unrecognized format specifier: '%s', possible values: raw, c",
*argv);
+ err = -EINVAL;
goto done;
}
NEXT_ARG();
} else {
p_err("unrecognized option: '%s'", *argv);
+ err = -EINVAL;
goto done;
}
}
diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 682daaa49e6a..33068d6ed5d6 100644
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -274,7 +274,7 @@ static int do_batch(int argc, char **argv)
int n_argc;
FILE *fp;
char *cp;
- int err;
+ int err = 0;
int i;

if (argc < 2) {
@@ -368,7 +368,6 @@ static int do_batch(int argc, char **argv)
} else {
if (!json_output)
printf("processed %d commands\n", lines);
- err = 0;
}
err_close:
if (fp != stdin)
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index a7efbd84fbcc..ce6faf1b90e8 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -99,7 +99,7 @@ static int do_dump_btf(const struct btf_dumper *d,
void *value)
{
__u32 value_id;
- int ret;
+ int ret = 0;

/* start of key-value pair */
jsonw_start_object(d->jw);
--
2.30.2


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