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Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size ex
From: |
Fernando Casas Schössow |
Subject: |
Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error |
Date: |
Thu, 28 Feb 2019 07:35:23 +0000 |
Just wanted to share a small update on the situation after updating QEMU to the
new Alpine package patched with Natanael's patch.
So far so good, moreover I switched a few other guests from SATA to VirtIO SCSI
and after two days no issues.
Unless I find any problem I will report back with an update in a week from now.
Thanks everyone for all you did to help find a solution to this issue.
On mar, feb 26, 2019 at 2:30 PM, Paolo Bonzini <address@hidden> wrote:
On 23/02/19 12:49, Natanael Copa wrote:
I suspect this happens due to the Alpine toolchain will enable
_FORTIFY_SOURCE=2 by default and the way this is implemented via
fortify-headers:
http://git.2f30.org/fortify-headers/file/include/string.h.html#l39
The call to __orig_memcpy is the culprit there, is there any reason not to do
something like _FORTIFY_FN(memcpy) void *__memcpy_chk(void *__od, const void
*__os, size_t __n) { size_t __bd = __builtin_object_size(__od, 0); size_t __bs
= __builtin_object_size(__os, 0); char *__d = (char *)__od; const char *__s =
(const char *)__os; /* trap if pointers are overlapping but not if dst == src.
* gcc seems to like to generate code that relies on dst == src */ if ((__d <
__s && __d + __n > __s) || (__s < __d && __s + __n > __d)) __builtin_trap(); if
(__n > __bd || __n > __bs) __builtin_trap(); return memcpy(__od, __os, __n); }
#define memcpy __memcpy_chk ? That is, getting rid of _FORTIFY_ORIG altogether.
Paolo
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, (continued)
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- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Stefan Hajnoczi, 2019/02/22
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Paolo Bonzini, 2019/02/22
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/22
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Paolo Bonzini, 2019/02/22
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/22
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Dr. David Alan Gilbert, 2019/02/22
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Paolo Bonzini, 2019/02/22
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Dr. David Alan Gilbert, 2019/02/22
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Natanael Copa, 2019/02/23
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Paolo Bonzini, 2019/02/26
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error,
Fernando Casas Schössow <=
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Natanael Copa, 2019/02/23
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Peter Maydell, 2019/02/23
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Natanael Copa, 2019/02/25
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Peter Maydell, 2019/02/25
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/25
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Natanael Copa, 2019/02/25
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Peter Maydell, 2019/02/25
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Natanael Copa, 2019/02/25
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/25
- Message not available
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/25