Blame SOURCES/0114-lib-bpf-Check-return-value-of-write.patch
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From 78f4b87c3f014e378377d3ecc55d1ec46cd57b51 Mon Sep 17 00:00:00 2001
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From: Andrea Claudi <aclaudi@redhat.com>
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Date: Mon, 29 Apr 2019 20:08:08 +0200
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Subject: [PATCH] lib/bpf: Check return value of write()
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1465646
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Upstream Status: iproute2.git commit b5c78e1b2c868
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commit b5c78e1b2c8681e82684f47563acd3d383893658
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Author: Phil Sutter <phil@nwl.cc>
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Date: Thu Aug 24 11:41:29 2017 +0200
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lib/bpf: Check return value of write()
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This is merely to silence the compiler warning. If write to stderr
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failed, assume that printing an error message will fail as well so don't
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even try.
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Signed-off-by: Phil Sutter <phil@nwl.cc>
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---
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lib/bpf.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/lib/bpf.c b/lib/bpf.c
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index 33c5288e82187..7eb754ad7cb56 100644
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--- a/lib/bpf.c
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+++ b/lib/bpf.c
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@@ -486,7 +486,8 @@ int bpf_trace_pipe(void)
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ret = read(fd, buff, sizeof(buff) - 1);
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if (ret > 0) {
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- write(2, buff, ret);
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+ if (write(STDERR_FILENO, buff, ret) != ret)
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+ return -1;
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fflush(stderr);
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}
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}
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--
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2.21.0
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