TestPatchHugeSeccompFilterDoesNotBlock is only testing the
disassembleFilter function. There is no need to invoke PatchAndLoad
which has the side effect of loading a seccomp profile.
Co-authored-by: Danail Branekov <danailster@gmail.com>
Co-authored-by: Kieron Browne <kbrowne@vmware.com>
Signed-off-by: Kieron Browne <kbrowne@vmware.com>
Signed-off-by: Danail Branekov <danailster@gmail.com>
There is a potential deadlock where the ExportBPF method call writes to
a pipe but the pipe is not read until after the method call returns.
ExportBPF might fill the pipe buffer, in which case it will block
waiting for a read on the other side which can't happen until the method
returns.
Here we concurrently read from the pipe into a buffer to ensure
ExportBPF will always return.
Co-authored-by: Kieron Browne <kbrowne@vmware.com>
Co-authored-by: Danail Branekov <danailster@gmail.com>
Signed-off-by: Kieron Browne <kbrowne@vmware.com>
Signed-off-by: Danail Branekov <danailster@gmail.com>
This test fails to compile on i386:
> libcontainer/seccomp/patchbpf/enosys_linux_test.go:180:20: constant 3735928559 overflows int
> libcontainer/seccomp/patchbpf/enosys_linux_test.go:204:19: constant 3735928559 overflows int
> libcontainer/seccomp/patchbpf/enosys_linux_test.go:227:25: constant 3735928559 overflows int
This is because golang.org/x/net/bpf returns an int from their emulated
BPF VM implementation when they should really be returning uint32.
Fix by switching to uint32 in the test code.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
