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Add a test to verify that the sleepable tracing prog cannot attach to a '__x64_sys' prefix prog target. When CONFIG_FUNCTION_ERROR_INJECTION is disabled, without the fix, the test would trigger the BUG: [ 3.460756] BUG: sleeping function called from invalid context at kernel/bpf/trampoline.c:1324 Signed-off-by: Leon Hwang <leon.hwang@linux.dev> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20260805150810.34907-3-leon.hwang@linux.dev