@montagy
The change you mention is part of virtualbox since 6.1.26
commit d0c8c1d9763108e99a60822c3441881cf0007e24 (tag: upstream/6.1.26-dfsg)
Author: Gianfranco Costamagna <[email protected]>
Date: Thu Jul 29 11:18:35 2021 +0200
New upstream version 6.1.26-dfsg
diff --git a/src/VBox/VMM/VMMR0/VMMR0JmpA-amd64.asm
b/src/VBox/VMM/VMMR0/VMMR0JmpA-amd64.asm
index 9d3304175..e1ab30b72 100644
--- a/src/VBox/VMM/VMMR0/VMMR0JmpA-amd64.asm
+++ b/src/VBox/VMM/VMMR0/VMMR0JmpA-amd64.asm
@@ -32,10 +32,17 @@
%define STACK_PADDING 0eeeeeeeeeeeeeeeeh
;; Workaround for linux 4.6 fast/slow syscall stack depth difference.
+;; Update: This got worse with linux 5.13 and
CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT.
+;; The x86 arch_exit_to_user_mode_prepare code limits the offset to
255,
+;; while the generic limit is 1023. See bugref:10064 for details.
%ifdef VMM_R0_SWITCH_STACK
%define STACK_FUZZ_SIZE 0
%else
- %define STACK_FUZZ_SIZE 128
+ %ifdef RT_OS_LINUX
+ %define STACK_FUZZ_SIZE 384
+ %else
+ %define STACK_FUZZ_SIZE 128
+ %endif
%endif
So definitely not the issue
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https://bugs.launchpad.net/bugs/2073267
Title:
Virtualbox Guru meditation on VM start caused by kernel commit in
v6.9-rc4
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