* [PATCH 1/2] tools, bpftool: Avoid array index warnings.
@ 2020-10-27 23:36 Ian Rogers
2020-10-27 23:36 ` [PATCH 2/2] tools, bpftool: Remove two unused variables Ian Rogers
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Ian Rogers @ 2020-10-27 23:36 UTC (permalink / raw)
To: Alexei Starovoitov, Daniel Borkmann, Martin KaFai Lau, Song Liu,
Yonghong Song, Andrii Nakryiko, John Fastabend, KP Singh,
Nathan Chancellor, Nick Desaulniers, Quentin Monnet,
Michal Rostecki, Toke Høiland-Jørgensen,
Tobias Klauser, linux-kernel, netdev, bpf
Cc: Ian Rogers
The bpf_caps array is shorter without CAP_BPF, avoid out of bounds reads
if this isn't defined. Working around this avoids -Wno-array-bounds with
clang.
Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/bpf/bpftool/feature.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c
index a43a6f10b564..359960a8f1de 100644
--- a/tools/bpf/bpftool/feature.c
+++ b/tools/bpf/bpftool/feature.c
@@ -843,9 +843,14 @@ static int handle_perms(void)
else
p_err("missing %s%s%s%s%s%s%s%srequired for full feature probing; run as root or use 'unprivileged'",
capability_msg(bpf_caps, 0),
+#ifdef CAP_BPF
capability_msg(bpf_caps, 1),
capability_msg(bpf_caps, 2),
- capability_msg(bpf_caps, 3));
+ capability_msg(bpf_caps, 3)
+#else
+ "", "", "", "", "", ""
+#endif /* CAP_BPF */
+ );
goto exit_free;
}
--
2.29.0.rc2.309.g374f81d7ae-goog
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH 2/2] tools, bpftool: Remove two unused variables.
2020-10-27 23:36 [PATCH 1/2] tools, bpftool: Avoid array index warnings Ian Rogers
@ 2020-10-27 23:36 ` Ian Rogers
2020-10-28 3:41 ` Andrii Nakryiko
2020-10-28 13:45 ` Tobias Klauser
2020-10-28 3:40 ` [PATCH 1/2] tools, bpftool: Avoid array index warnings Andrii Nakryiko
2020-10-28 13:44 ` Tobias Klauser
2 siblings, 2 replies; 6+ messages in thread
From: Ian Rogers @ 2020-10-27 23:36 UTC (permalink / raw)
To: Alexei Starovoitov, Daniel Borkmann, Martin KaFai Lau, Song Liu,
Yonghong Song, Andrii Nakryiko, John Fastabend, KP Singh,
Nathan Chancellor, Nick Desaulniers, Quentin Monnet,
Michal Rostecki, Toke Høiland-Jørgensen,
Tobias Klauser, linux-kernel, netdev, bpf
Cc: Ian Rogers
Avoid an unused variable warning.
Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/bpf/bpftool/skeleton/profiler.bpf.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/bpf/bpftool/skeleton/profiler.bpf.c b/tools/bpf/bpftool/skeleton/profiler.bpf.c
index 4e3512f700c0..ce5b65e07ab1 100644
--- a/tools/bpf/bpftool/skeleton/profiler.bpf.c
+++ b/tools/bpf/bpftool/skeleton/profiler.bpf.c
@@ -70,7 +70,7 @@ int BPF_PROG(fentry_XXX)
static inline void
fexit_update_maps(u32 id, struct bpf_perf_event_value *after)
{
- struct bpf_perf_event_value *before, diff, *accum;
+ struct bpf_perf_event_value *before, diff;
before = bpf_map_lookup_elem(&fentry_readings, &id);
/* only account samples with a valid fentry_reading */
@@ -95,7 +95,7 @@ int BPF_PROG(fexit_XXX)
{
struct bpf_perf_event_value readings[MAX_NUM_MATRICS];
u32 cpu = bpf_get_smp_processor_id();
- u32 i, one = 1, zero = 0;
+ u32 i, zero = 0;
int err;
u64 *count;
--
2.29.0.rc2.309.g374f81d7ae-goog
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH 1/2] tools, bpftool: Avoid array index warnings.
2020-10-27 23:36 [PATCH 1/2] tools, bpftool: Avoid array index warnings Ian Rogers
2020-10-27 23:36 ` [PATCH 2/2] tools, bpftool: Remove two unused variables Ian Rogers
@ 2020-10-28 3:40 ` Andrii Nakryiko
2020-10-28 13:44 ` Tobias Klauser
2 siblings, 0 replies; 6+ messages in thread
From: Andrii Nakryiko @ 2020-10-28 3:40 UTC (permalink / raw)
To: Ian Rogers
Cc: Alexei Starovoitov, Daniel Borkmann, Martin KaFai Lau, Song Liu,
Yonghong Song, Andrii Nakryiko, John Fastabend, KP Singh,
Nathan Chancellor, Nick Desaulniers, Quentin Monnet,
Michal Rostecki, Toke Høiland-Jørgensen,
Tobias Klauser, open list, Networking, bpf
On Tue, Oct 27, 2020 at 4:37 PM Ian Rogers <irogers@google.com> wrote:
>
> The bpf_caps array is shorter without CAP_BPF, avoid out of bounds reads
> if this isn't defined. Working around this avoids -Wno-array-bounds with
> clang.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
Acked-by: Andrii Nakryiko <andrii@kernel.org>
> tools/bpf/bpftool/feature.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c
> index a43a6f10b564..359960a8f1de 100644
> --- a/tools/bpf/bpftool/feature.c
> +++ b/tools/bpf/bpftool/feature.c
> @@ -843,9 +843,14 @@ static int handle_perms(void)
> else
> p_err("missing %s%s%s%s%s%s%s%srequired for full feature probing; run as root or use 'unprivileged'",
> capability_msg(bpf_caps, 0),
> +#ifdef CAP_BPF
> capability_msg(bpf_caps, 1),
> capability_msg(bpf_caps, 2),
> - capability_msg(bpf_caps, 3));
> + capability_msg(bpf_caps, 3)
> +#else
> + "", "", "", "", "", ""
> +#endif /* CAP_BPF */
> + );
> goto exit_free;
> }
>
> --
> 2.29.0.rc2.309.g374f81d7ae-goog
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 2/2] tools, bpftool: Remove two unused variables.
2020-10-27 23:36 ` [PATCH 2/2] tools, bpftool: Remove two unused variables Ian Rogers
@ 2020-10-28 3:41 ` Andrii Nakryiko
2020-10-28 13:45 ` Tobias Klauser
1 sibling, 0 replies; 6+ messages in thread
From: Andrii Nakryiko @ 2020-10-28 3:41 UTC (permalink / raw)
To: Ian Rogers
Cc: Alexei Starovoitov, Daniel Borkmann, Martin KaFai Lau, Song Liu,
Yonghong Song, Andrii Nakryiko, John Fastabend, KP Singh,
Nathan Chancellor, Nick Desaulniers, Quentin Monnet,
Michal Rostecki, Toke Høiland-Jørgensen,
Tobias Klauser, open list, Networking, bpf
On Tue, Oct 27, 2020 at 4:37 PM Ian Rogers <irogers@google.com> wrote:
>
> Avoid an unused variable warning.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
Acked-by: Andrii Nakryiko <andrii@kernel.org>
> tools/bpf/bpftool/skeleton/profiler.bpf.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tools/bpf/bpftool/skeleton/profiler.bpf.c b/tools/bpf/bpftool/skeleton/profiler.bpf.c
> index 4e3512f700c0..ce5b65e07ab1 100644
> --- a/tools/bpf/bpftool/skeleton/profiler.bpf.c
> +++ b/tools/bpf/bpftool/skeleton/profiler.bpf.c
> @@ -70,7 +70,7 @@ int BPF_PROG(fentry_XXX)
> static inline void
> fexit_update_maps(u32 id, struct bpf_perf_event_value *after)
> {
> - struct bpf_perf_event_value *before, diff, *accum;
> + struct bpf_perf_event_value *before, diff;
>
> before = bpf_map_lookup_elem(&fentry_readings, &id);
> /* only account samples with a valid fentry_reading */
> @@ -95,7 +95,7 @@ int BPF_PROG(fexit_XXX)
> {
> struct bpf_perf_event_value readings[MAX_NUM_MATRICS];
> u32 cpu = bpf_get_smp_processor_id();
> - u32 i, one = 1, zero = 0;
> + u32 i, zero = 0;
> int err;
> u64 *count;
>
> --
> 2.29.0.rc2.309.g374f81d7ae-goog
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 1/2] tools, bpftool: Avoid array index warnings.
2020-10-27 23:36 [PATCH 1/2] tools, bpftool: Avoid array index warnings Ian Rogers
2020-10-27 23:36 ` [PATCH 2/2] tools, bpftool: Remove two unused variables Ian Rogers
2020-10-28 3:40 ` [PATCH 1/2] tools, bpftool: Avoid array index warnings Andrii Nakryiko
@ 2020-10-28 13:44 ` Tobias Klauser
2 siblings, 0 replies; 6+ messages in thread
From: Tobias Klauser @ 2020-10-28 13:44 UTC (permalink / raw)
To: Ian Rogers
Cc: Alexei Starovoitov, Daniel Borkmann, Martin KaFai Lau, Song Liu,
Yonghong Song, Andrii Nakryiko, John Fastabend, KP Singh,
Nathan Chancellor, Nick Desaulniers, Quentin Monnet,
Michal Rostecki, Toke Høiland-Jørgensen, linux-kernel,
netdev, bpf
On 2020-10-28 at 00:36:45 +0100, Ian Rogers <irogers@google.com> wrote:
> The bpf_caps array is shorter without CAP_BPF, avoid out of bounds reads
> if this isn't defined. Working around this avoids -Wno-array-bounds with
> clang.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Tobias Klauser <tklauser@distanz.ch>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 2/2] tools, bpftool: Remove two unused variables.
2020-10-27 23:36 ` [PATCH 2/2] tools, bpftool: Remove two unused variables Ian Rogers
2020-10-28 3:41 ` Andrii Nakryiko
@ 2020-10-28 13:45 ` Tobias Klauser
1 sibling, 0 replies; 6+ messages in thread
From: Tobias Klauser @ 2020-10-28 13:45 UTC (permalink / raw)
To: Ian Rogers
Cc: Alexei Starovoitov, Daniel Borkmann, Martin KaFai Lau, Song Liu,
Yonghong Song, Andrii Nakryiko, John Fastabend, KP Singh,
Nathan Chancellor, Nick Desaulniers, Quentin Monnet,
Michal Rostecki, Toke Høiland-Jørgensen, linux-kernel,
netdev, bpf
On 2020-10-28 at 00:36:46 +0100, Ian Rogers <irogers@google.com> wrote:
> Avoid an unused variable warning.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Tobias Klauser <tklauser@distanz.ch>
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-10-28 23:48 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2020-10-27 23:36 [PATCH 1/2] tools, bpftool: Avoid array index warnings Ian Rogers
2020-10-27 23:36 ` [PATCH 2/2] tools, bpftool: Remove two unused variables Ian Rogers
2020-10-28 3:41 ` Andrii Nakryiko
2020-10-28 13:45 ` Tobias Klauser
2020-10-28 3:40 ` [PATCH 1/2] tools, bpftool: Avoid array index warnings Andrii Nakryiko
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