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authorQuentin Monnet <quentin@isovalent.com>2021-10-22 10:47:43 +0100
committerAndrii Nakryiko <andrii@kernel.org>2021-10-22 16:44:56 -0700
commite89ef634f81c9d90e1824ab183721f3b361472e6 (patch)
tree1eec7ee66d53cc820e11d78009bb21087e0dc7b2 /tools/lib/bpf/libbpf_legacy.h
parent59f2a29c04128a46df0031d4deb4c4b07c5edcea (diff)
bpftool: Avoid leaking the JSON writer prepared for program metadata
Bpftool creates a new JSON object for writing program metadata in plain text mode, regardless of metadata being present or not. Then this writer is freed if any metadata has been found and printed, but it leaks otherwise. We cannot destroy the object unconditionally, because the destructor prints an undesirable line break. Instead, make sure the writer is created only after we have found program metadata to print. Found with valgrind. Fixes: aff52e685eb3 ("bpftool: Support dumping metadata") Signed-off-by: Quentin Monnet <quentin@isovalent.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211022094743.11052-1-quentin@isovalent.com
Diffstat (limited to 'tools/lib/bpf/libbpf_legacy.h')
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