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geom: Report copyout() errors in g_ctl_ioctl_ctl()
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Authored by markj on Dec 21 2023, 2:45 AM.
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Details

Summary

Despite the name, req->serror is used in some cases to copy non-error
messages to userspace. So, report errors when copying out so long as
they don't clobber an earlier error.

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rG FreeBSD src repository
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