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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: "Xiaoyao Li" <xiaoyao.li@intel.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"QEMU Developers" <qemu-devel@nongnu.org>,
	"Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
	"Richard Henderson" <richard.henderson@linaro.org>,
	"Eduardo Habkost" <eduardo@habkost.net>,
	"Peter Maydell" <peter.maydell@linaro.org>,
	"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
	"Laurent Vivier" <laurent@vivier.eu>,
	"Michael S . Tsirkin" <mst@redhat.com>
Subject: Re: [PULL 9/9] hw/i386: pass RNG seed via setup_data entry
Date: Wed, 3 Aug 2022 15:34:04 +0200	[thread overview]
Message-ID: <Yup5TG2kZs+TifEJ@zx2c4.com> (raw)
In-Reply-To: <Yup0FIOLLo0thP8u@zx2c4.com>

On Wed, Aug 03, 2022 at 03:11:48PM +0200, Jason A. Donenfeld wrote:
> Thanks for the info. Very helpful. Looking into it now.

So interestingly, this is not a new issue. If you pass any type of setup
data, OVMF appears to be doing something unusual and passing 0xffffffff
for all the entries, rather than the actual data. The reason this isn't
new is: try passing `-dtb any/dtb/at/all/from/anywhere` and you get the
same page fault, on all QEMU versions. The thing that passes the DTB is
the thing that passes the RNG seed. Same mechanism, same bug.

I'm looking into it...

Jason


  reply	other threads:[~2022-08-03 14:03 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-21 16:36 [PULL 0/9] More fixes + random seed patches for QEMU 7.1 Paolo Bonzini
2022-07-21 16:36 ` [PULL 1/9] docs: Add caveats for Windows as the build platform Paolo Bonzini
2022-07-21 16:36 ` [PULL 2/9] accel/kvm: Avoid Coverity warning in query_stats() Paolo Bonzini
2022-07-21 16:36 ` [PULL 3/9] oss-fuzz: remove binaries from qemu-bundle tree Paolo Bonzini
2022-07-21 16:36 ` [PULL 4/9] oss-fuzz: ensure base_copy is a generic-fuzzer Paolo Bonzini
2022-07-21 16:36 ` [PULL 5/9] hw/nios2: virt: pass random seed to fdt Paolo Bonzini
2022-07-21 16:36 ` [PULL 6/9] hw/mips: boston: " Paolo Bonzini
2022-07-21 16:36 ` [PULL 7/9] hw/guest-loader: " Paolo Bonzini
2022-07-21 19:36   ` Alex Bennée
2022-07-21 20:20     ` Jason A. Donenfeld
2022-07-22  9:45       ` Alex Bennée
2022-07-22 11:26         ` Jason A. Donenfeld
2022-07-22 14:27           ` Alex Bennée
2022-07-22 16:32             ` Paolo Bonzini
2022-07-22 19:07             ` Jason A. Donenfeld
2022-07-22 12:04       ` Paolo Bonzini
2022-07-22 12:21         ` Jason A. Donenfeld
2022-07-21 16:36 ` [PULL 8/9] hw/rx: " Paolo Bonzini
2022-07-21 16:36 ` [PULL 9/9] hw/i386: pass RNG seed via setup_data entry Paolo Bonzini
2022-08-02  3:28   ` Xiaoyao Li
2022-08-02 13:21     ` Jason A. Donenfeld
2022-08-02 14:53       ` Xiaoyao Li
2022-08-02 15:06         ` Jason A. Donenfeld
2022-08-02 15:13           ` Jason A. Donenfeld
2022-08-03  1:34             ` Xiaoyao Li
2022-08-03 10:52             ` Daniel P. Berrangé
2022-08-03 13:11               ` Jason A. Donenfeld
2022-08-03 13:34                 ` Jason A. Donenfeld [this message]
2022-08-03 17:07                   ` Jason A. Donenfeld
2022-08-03 22:03                     ` Michael S. Tsirkin
2022-08-03 22:08                       ` Jason A. Donenfeld
2022-08-03 22:23                         ` Michael S. Tsirkin
2022-08-04  5:40                           ` Laszlo Ersek
2022-08-04 12:01   ` Daniel P. Berrangé
2022-08-04 12:13     ` Jason A. Donenfeld
2022-08-04 12:48       ` Daniel P. Berrangé
2022-08-04 16:56     ` Alex Bennée

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