Date: Mon, 21 Jan 2019 09:27:46 -0800 From: Cy Schubert <Cy.Schubert@cschubert.com> To: Ed Maste <emaste@FreeBSD.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r343262 - head/sys/amd64/linux Message-ID: <CE31DB81-1298-404F-8788-27C5DDE0C479@cschubert.com> In-Reply-To: <201901211625.x0LGPfBd047017@repo.freebsd.org> References: <201901211625.x0LGPfBd047017@repo.freebsd.org>
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On January 21, 2019 8:25:41 AM PST, Ed Maste <emaste@FreeBSD=2Eorg> wrote: >Author: emaste >Date: Mon Jan 21 16:25:40 2019 >New Revision: 343262 >URL: https://svnweb=2Efreebsd=2Eorg/changeset/base/343262 > >Log: > linuxulator: fix stack memory disclosure in linux_sigaltstack > =20 > admbugs: 765 > Reported by: Vlad Tsyrklevich <vlad@tsyrklevich=2Enet> > Reviewed by: andrew > MFC after: 1 day > Security: Kernel memory disclosure > Sponsored by: The FreeBSD Foundation > >Modified: > head/sys/amd64/linux/linux_machdep=2Ec > >Modified: head/sys/amd64/linux/linux_machdep=2Ec >=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D >--- head/sys/amd64/linux/linux_machdep=2Ec Mon Jan 21 16:21:03 >2019 (r343261) >+++ head/sys/amd64/linux/linux_machdep=2Ec Mon Jan 21 16:25:40 >2019 (r343262) >@@ -201,6 +201,7 @@ linux_sigaltstack(struct thread *td, struct >linux_siga > l_stack_t lss; > int error; >=20 >+ memset(&lss, 0, sizeof(lss)); > LINUX_CTR2(sigaltstack, "%p, %p", uap->uss, uap->uoss); >=20 > if (uap->uss !=3D NULL) { Do we have a CVE for this? --=20 Pardon the typos and autocorrect, small keyboard in use=2E Cheers, Cy Schubert <Cy=2ESchubert@cschubert=2Ecom> FreeBSD UNIX: <cy@FreeBSD=2Eorg> Web: http://www=2EFreeBSD=2Eorg The need of the many outweighs the greed of the few=2E
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