Messages in this thread | | | Date | Thu, 7 Nov 2019 17:57:52 +0100 | From | Willy Tarreau <> | Subject | Re: [patch 5/9] x86/ioport: Reduce ioperm impact for sane usage further |
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On Thu, Nov 07, 2019 at 10:45:09AM -0600, Eric W. Biederman wrote: > Further a quick look shows that dosemu uses ioperm in a fine grained > manner. From memory it would allow a handful of ports to allow directly > accessing a device and depended on the rest of the port accesses to be > disallowed so it could trap and emulate them. > > So yes I do believe making ioperm ioperm(all) will break userspace.
OK, and I must confess I almost forgot about dosemu, that's a good point!
Thanks, Willy
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