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From: osalvador.vilardaga@gmail.com (Oscar Salvador)
To: kernelnewbies@lists.kernelnewbies.org
Subject: check if a kernel page is read-only
Date: Mon, 5 Sep 2016 12:59:46 +0200	[thread overview]
Message-ID: <CAOXBz7iq1ww_YNMQEMHNhOxHnDhdQAgu6qKqERcW4Fs3YY2i6Q@mail.gmail.com> (raw)

Hi all,

I'm writing a module to read/write kernel memory, and for this I'd like to
check if a page is marked as read-only, so we don't have the right to write
there (kernel code for instance).

I though about the flags field from "struct page {}", but from the name I
can't see any useful flag to check this.

The only flag I saw is different between kernel code and module code is
that kernel code has the flag "reserved" enabled, so it's not swapped.

Could someone provide me a hint about that?

Thank you very much
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             reply	other threads:[~2016-09-05 10:59 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-05 10:59 Oscar Salvador [this message]
2016-09-05 11:46 ` check if a kernel page is read-only Oscar Salvador
2016-09-05 16:57 ` Valdis.Kletnieks at vt.edu
2016-09-06  8:24   ` Peter Senna Tschudin
2016-09-06 11:23   ` Oscar Salvador
2016-09-06 19:47     ` Valdis.Kletnieks at vt.edu
2016-09-07 13:47       ` Oscar Salvador
2016-09-07 15:38         ` Oscar Salvador
2016-09-07 16:48         ` Valdis.Kletnieks at vt.edu
2016-09-12 12:28           ` Oscar Salvador

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