Messages in this thread | | | Date | Tue, 30 Jun 2020 09:04:34 +0200 | From | Christoph Hellwig <> | Subject | Re: [PATCH 03/11] fs: add new read_uptr and write_uptr file operations |
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Next fund one, in net/ipv6/ip6_flowlabel.c:ipv6_flowlabel_opt() we have this gem toward the end:
if (!freq->flr_label) { if (copy_to_user(&((struct in6_flowlabel_req __user *)optval)->flr_label, &fl->label, sizeof(fl->label))) { /* Intentionally ignore fault. */
so it writes back to what was supposed to be the input parameter, and only does it for a partial region. Not sure how we could handle that with any kind of copy to kernel in the caller scheme?
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