mirror of https://github.com/mkerrisk/man-pages
userfaultfd.2: Tweaks to Yang Xu's patch
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -441,10 +441,13 @@ reached.
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.B ENOMEM
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.B ENOMEM
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Insufficient kernel memory was available.
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Insufficient kernel memory was available.
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.TP
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.TP
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.B EPERM
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.BR EPERM " (since Linux 5.2)"
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Unprivileged user(without SYS_CAP_PTRACE capability) uses this call when
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set unprivileged_userfaultfd to 0. It was introduced since Linux 5.2.
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.\" cefdca0a86be517bc390fc4541e3674b8e7803b0
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.\" cefdca0a86be517bc390fc4541e3674b8e7803b0
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The caller is not privileged (does not have the
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.B CAP_SYS_PTRACE
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capability), and
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.I /proc/sys/vm/unprivileged_userfaultfd
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has the value 0.
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.SH VERSIONS
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.SH VERSIONS
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The
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The
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.BR userfaultfd ()
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.BR userfaultfd ()
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