forked from pool/virtualbox
24 lines
853 B
Diff
24 lines
853 B
Diff
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Index: VirtualBox-6.1.22/src/VBox/VMM/VMMR0/VMMR0JmpA-amd64.asm
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===================================================================
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--- VirtualBox-6.1.22.orig/src/VBox/VMM/VMMR0/VMMR0JmpA-amd64.asm
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+++ VirtualBox-6.1.22/src/VBox/VMM/VMMR0/VMMR0JmpA-amd64.asm
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@@ -32,10 +32,17 @@
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%define STACK_PADDING 0eeeeeeeeeeeeeeeeh
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;; Workaround for linux 4.6 fast/slow syscall stack depth difference.
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+;; Update: This got worse with linux 5.13 and CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT.
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+;; The x86 arch_exit_to_user_mode_prepare code limits the offset to 255,
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+;; while the generic limit is 1023. See bugref:10064 for details.
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%ifdef VMM_R0_SWITCH_STACK
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%define STACK_FUZZ_SIZE 0
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%else
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- %define STACK_FUZZ_SIZE 128
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+ %ifdef RT_OS_LINUX
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+ %define STACK_FUZZ_SIZE 384
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+ %else
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+ %define STACK_FUZZ_SIZE 128
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+ %endif
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%endif
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