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From: Quentin Monnet <quentin.monnet@netronome.com>
To: Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
	oss-drivers@netronome.com,
	Quentin Monnet <quentin.monnet@netronome.com>
Subject: [PATCH bpf 4/6] tools: bpftool: fix format string for p_err() in query_flow_dissector()
Date: Thu, 15 Aug 2019 15:32:18 +0100	[thread overview]
Message-ID: <20190815143220.4199-5-quentin.monnet@netronome.com> (raw)
In-Reply-To: <20190815143220.4199-1-quentin.monnet@netronome.com>

The format string passed to one call to the p_err() function in
query_flow_dissector() does not match the value that should be printed,
resulting in some garbage integer being printed instead of
strerror(errno) if /proc/self/ns/net cannot be open. Let's fix the
format string.

Fixes: 7f0c57fec80f ("bpftool: show flow_dissector attachment status")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
---
 tools/bpf/bpftool/net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/bpf/bpftool/net.c b/tools/bpf/bpftool/net.c
index 67e99c56bc88..e3b770082a39 100644
--- a/tools/bpf/bpftool/net.c
+++ b/tools/bpf/bpftool/net.c
@@ -197,7 +197,7 @@ static int query_flow_dissector(struct bpf_attach_info *attach_info)
 
 	fd = open("/proc/self/ns/net", O_RDONLY);
 	if (fd < 0) {
-		p_err("can't open /proc/self/ns/net: %d",
+		p_err("can't open /proc/self/ns/net: %s",
 		      strerror(errno));
 		return -1;
 	}
-- 
2.17.1


  parent reply	other threads:[~2019-08-15 14:32 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-15 14:32 [PATCH bpf 0/6] tools: bpftool: fix printf()-like functions Quentin Monnet
2019-08-15 14:32 ` [PATCH bpf 1/6] tools: bpftool: fix arguments for p_err() in do_event_pipe() Quentin Monnet
2019-08-15 14:32 ` [PATCH bpf 2/6] tools: bpftool: fix format strings and arguments for jsonw_printf() Quentin Monnet
2019-08-15 14:32 ` [PATCH bpf 3/6] tools: bpftool: fix argument for p_err() in BTF do_dump() Quentin Monnet
2019-08-15 14:32 ` Quentin Monnet [this message]
2019-08-15 14:32 ` [PATCH bpf 5/6] tools: bpftool: fix format string for p_err() in detect_common_prefix() Quentin Monnet
2019-08-15 14:32 ` [PATCH bpf 6/6] tools: bpftool: move "__printf()" attributes to header file Quentin Monnet
2019-08-16  5:08 ` [PATCH bpf 0/6] tools: bpftool: fix printf()-like functions Alexei Starovoitov
2019-08-16 16:41   ` Quentin Monnet
2019-08-16 17:11     ` Alexei Starovoitov
2019-08-16 17:18       ` Quentin Monnet
2019-08-16 17:51       ` Jakub Kicinski

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