Firecracker can hang when a log write hits a broken pipe
Brief
This is an allowlist add, not a seccomp bypass.
Notes
40f2ed2d3fd5 (Riccardo Mancini, 2026-08-24). Do not log from the SIGPIPE handler. 84e6dd47aed1 allows rt_sigreturn on the API thread so the returning handler can resume. vmm and vcpu already had that syscall.
Not a recast of the Cloud Hypervisor HTTP remap allowlist fcca649c.
Commit 40f2ed2d3fd5896e378cf2fe07717efab66f1167