fix: donate EROFS submount FDs in goferless mode#13597
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EtiennePerot
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Jun 30, 2026
When an EROFS rootfs runs without a gofer process, runsc still has to provide image FDs for EROFS config mounts. The goferless path only opened the rootfs image, so boot could run out of gofer FDs while preparing submounts. This patch donates EROFS submount image FDs in config mount order and adds a test to cover such case. Signed-off-by: Tianyu Zhou <albert.zty@antgroup.com>
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When an EROFS rootfs runs without a gofer process, runsc still has to provide image FDs for EROFS config mounts. The goferless path only opened the rootfs image, so boot could run out of gofer FDs while preparing submounts.
This patch donates EROFS submount image FDs in config mount order and adds a test to cover such case.