Linux/EmulatedFiles: Check return for memfd_create & work around hack #4139
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xshmwrap is a hack to make libxshmfence use shared memory files for futexes instead of memfds. To do this, it bans memfd_create(*, MFD_ALLOW_SEALING | MFD_CLOEXEC) using seccomp-bpf. This happens to hit the FEX GenTmpFD() code. If this failure happens, work around it by setting the FD_CLOEXEC flag separately. Signed-off-by: Asahi Lina <[email protected]>
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upstream fix merged |
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xshmwrap is a hack to make libxshmfence use shared memory files for futexes instead of memfds. To do this, it bans memfd_create(*, MFD_ALLOW_SEALING | MFD_CLOEXEC) using seccomp-bpf. This happens to hit the FEX GenTmpFD() code.
If this failure happens, work around it by setting the FD_CLOEXEC flag separately.1