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[ Upstream commitbfd862a7e9] '$cin' and '$sin' variables are local to a function: they are then not available from the cleanup trap. Instead, we need to use '$large' and '$small' that are not local and defined just before setting the trap. Without this patch, running this script in a loop might cause a: write: No space left on device issue. Fixes:1a418cb8e8("mptcp: simult flow self-tests") Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>