From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kees Cook Date: Thu, 24 Feb 2022 03:58:58 +0000 Subject: Re: regression: Bug 215601 - gcc segv at startup on ia64 Message-Id: <202202231957.801F1780@keescook> List-Id: References: <823f70be-7661-0195-7c97-65673dc7c12a@leemhuis.info> <03497313-A472-4152-BD28-41C35E4E824E@chromium.org> <94c3be49-0262-c613-e5f5-49b536985dde@physik.fu-berlin.de> <9A1F30F8-3DE2-4075-B103-81D891773246@chromium.org> <4e42e754-d87e-5f6b-90db-39b4700ee0f1@physik.fu-berlin.de> In-Reply-To: <4e42e754-d87e-5f6b-90db-39b4700ee0f1@physik.fu-berlin.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: John Paul Adrian Glaubitz Cc: Thorsten Leemhuis , Anthony Yznaga , matoro_bugzilla_kernel@matoro.tk, Andrew Morton , "regressions@lists.linux.dev" , linux-ia64@vger.kernel.org, Linux-fsdevel , Linux Kernel Mailing List , Alexander Viro On Mon, Feb 21, 2022 at 10:57:01PM +0100, John Paul Adrian Glaubitz wrote: > Hi Kees! > > On 2/21/22 21:58, Kees Cook wrote: > >> I have applied this patch on top of 038101e6b2cd5c55f888f85db42ea2ad3aecb4b6 and it doesn't > >> fix the problem for me. Reverting 5f501d555653f8968011a1e65ebb121c8b43c144, however, fixes > >> the problem. > >> > >> FWIW, this problem doesn't just affect GCC but systemd keeps segfaulting with this change as well. > > > > Very weird! Can you attached either of those binaries to bugzilla (or a URL I can fetch it from)? I can try to figure out where it is going weird... > > Here's the initrd of that particular machine: > > > https://people.debian.org/~glaubitz/initrd.img-5.17.0-rc5+ > > You should be able to extract the binaries from this initrd image and the "mount" command, > for example, should be one of the affected binaries. I don't see anything immediately obvious here, but I'll keep looking. Is there any way to emulate ia64? I don't see anything that'll work under QEMU... -- Kees Cook