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From: Florian Weimer <fweimer@redhat.com>
To: Szabolcs Nagy <szabolcs.nagy@arm.com>
Cc: "H.J. Lu" <hjl.tools@gmail.com>,
	 "H.J. Lu via Libc-alpha" <libc-alpha@sourceware.org>,
	 Joseph Myers <joseph@codesourcery.com>
Subject: Re: [RFC] <sys/tagged-address.h>: An API for tagged address
Date: Thu, 18 Feb 2021 14:21:42 +0100	[thread overview]
Message-ID: <878s7lmryx.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <20210218131751.GC12795@arm.com> (Szabolcs Nagy's message of "Thu, 18 Feb 2021 13:17:53 +0000")

* Szabolcs Nagy:

> we want the libc to decide early about the tagged syscall abi,
> later there is no reliable way to do it for the entire process.
> for this we may need to mark binaries that use tags (such
> marking also tells us that the binary is not MTE compatible)
> unfortunately HWASAN does not use any marking. (lack of marking
> is an issue in other sanitizers too). currently the opt-in is
> done based on a tunable that requests heap tagging.

Apparently x86 has a similar issue, see Kirill's comment that
H.J. relayed:

  <https://sourceware.org/pipermail/libc-alpha/2021-February/122775.html>

Thanks,
Florian


      reply	other threads:[~2021-02-18 13:21 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-11 17:37 H.J. Lu
2021-02-11 20:28 ` Joseph Myers
2021-02-11 21:39   ` H.J. Lu
2021-02-12  9:43     ` Florian Weimer
2021-02-12 13:06       ` H.J. Lu
2021-02-17 18:43         ` H.J. Lu
2021-02-17 21:58           ` H.J. Lu
2021-02-18 13:24             ` Szabolcs Nagy
2021-02-18 13:28               ` Florian Weimer
2021-02-18 13:50                 ` Szabolcs Nagy
2021-02-18 22:32                   ` H.J. Lu
2021-02-22  8:27                     ` Szabolcs Nagy
2021-02-22 13:57                       ` H.J. Lu
2021-02-18 13:17         ` Szabolcs Nagy
2021-02-18 13:21           ` Florian Weimer [this message]

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