From: Andy Lutomirski <luto@kernel.org>
To: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Juergen Gross <jgross@suse.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Borislav Petkov <bp@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>, X86 ML <x86@kernel.org>,
Len Brown <len.brown@intel.com>,
Dave Hansen <dave.hansen@intel.com>,
"H. J. Lu" <hjl.tools@gmail.com>,
Dave Martin <Dave.Martin@arm.com>, Jann Horn <jannh@google.com>,
Michael Ellerman <mpe@ellerman.id.au>,
"Carlos O'Donell" <carlos@redhat.com>,
Tony Luck <tony.luck@intel.com>,
"Ravi V. Shankar" <ravi.v.shankar@intel.com>,
libc-alpha <libc-alpha@sourceware.org>,
linux-arch <linux-arch@vger.kernel.org>,
Linux API <linux-api@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
"Bae, Chang Seok" <chang.seok.bae@intel.com>
Subject: Re: [PATCH v7 5/6] x86/signal: Detect and prevent an alternate signal stack overflow
Date: Thu, 25 Mar 2021 21:58:54 -0700 [thread overview]
Message-ID: <CALCETrVRz8kvqxk2Xg5=c_0YWcgofXnqPb3uZRcca9pphE0sHg@mail.gmail.com> (raw)
In-Reply-To: <CALCETrU_n+dP4GaUJRQoKcDSwaWL9Vc99Yy+N=QGVZ_tx_j3Zg@mail.gmail.com>
I forgot to mention why I cc'd all you fine Xen folk:
On Thu, Mar 25, 2021 at 11:13 AM Andy Lutomirski <luto@kernel.org> wrote:
>
> > } else if (IS_ENABLED(CONFIG_X86_32) &&
> > !onsigstack &&
> > regs->ss != __USER_DS &&
This bit here seems really dubious on Xen PV. Honestly it seems
dubious everywhere, but especially on Xen PV.
--Andy
next prev parent reply other threads:[~2021-03-26 5:00 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-16 6:52 [PATCH v7 0/6] x86: Improve Minimum Alternate Stack Size Chang S. Bae
2021-03-16 6:52 ` [PATCH v7 1/6] uapi: Define the aux vector AT_MINSIGSTKSZ Chang S. Bae
2021-03-16 6:52 ` [PATCH v7 2/6] x86/signal: Introduce helpers to get the maximum signal frame size Chang S. Bae
2021-03-16 6:52 ` [PATCH v7 3/6] x86/elf: Support a new ELF aux vector AT_MINSIGSTKSZ Chang S. Bae
2021-03-16 6:52 ` [PATCH v7 4/6] selftest/sigaltstack: Use the AT_MINSIGSTKSZ aux vector if available Chang S. Bae
2021-03-16 6:52 ` [PATCH v7 5/6] x86/signal: Detect and prevent an alternate signal stack overflow Chang S. Bae
2021-03-16 11:52 ` Borislav Petkov
2021-03-16 18:26 ` Bae, Chang Seok
2021-03-25 16:20 ` Borislav Petkov
2021-03-25 17:21 ` Bae, Chang Seok
2021-03-25 20:14 ` Florian Weimer
2021-03-25 18:13 ` Andy Lutomirski
2021-03-25 18:54 ` Borislav Petkov
2021-03-25 21:11 ` Bae, Chang Seok
2021-03-25 21:27 ` Borislav Petkov
2021-03-26 4:56 ` Andy Lutomirski
2021-03-26 10:30 ` Borislav Petkov
2021-04-12 22:30 ` Bae, Chang Seok
2021-04-14 10:12 ` Borislav Petkov
2021-04-14 11:30 ` Florian Weimer
2021-04-14 12:06 ` Borislav Petkov
2021-05-03 5:30 ` Florian Weimer
2021-05-03 11:17 ` Borislav Petkov
2021-03-26 4:58 ` Andy Lutomirski [this message]
2021-03-16 6:52 ` [PATCH v7 6/6] selftest/x86/signal: Include test cases for validating sigaltstack Chang S. Bae
2021-03-17 10:06 ` [PATCH v7 0/6] x86: Improve Minimum Alternate Stack Size Ingo Molnar
2021-03-17 10:44 ` Ingo Molnar
2021-03-19 18:12 ` Len Brown
2021-03-20 17:32 ` Ingo Molnar
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