fs: reject special files for ref reads#6903
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Ref and rootfs helpers may read paths supplied by frontends or build outputs. Reject non-regular files before reading them into memory so device and FIFO paths cannot feed no-EOF streams into parsers or bundle injection logic. Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
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Ref and rootfs helpers may read paths supplied by frontends or build outputs. Reject non-regular files before reading them into memory so device and FIFO paths cannot feed no-EOF streams into parsers or bundle injection logic.
This is follow-up to one of the patches in v0.31.1. Similar pattern but in non-security-critical code paths.