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| author | Andy Lutomirski | 2019-06-27 06:45:07 +0200 |
|---|---|---|
| committer | Thomas Gleixner | 2019-06-28 00:04:39 +0200 |
| commit | 625b7b7f79c66626fb2b7687fc1a58309a57edd5 (patch) | |
| tree | e3f61406aeda2c604bc5cfd18a9fc048ba84011e /arch/x86/Kconfig | |
| parent | selftests/x86/vsyscall: Verify that vsyscall=none blocks execution (diff) | |
| download | kernel-qcow2-linux-625b7b7f79c66626fb2b7687fc1a58309a57edd5.tar.gz kernel-qcow2-linux-625b7b7f79c66626fb2b7687fc1a58309a57edd5.tar.xz kernel-qcow2-linux-625b7b7f79c66626fb2b7687fc1a58309a57edd5.zip | |
x86/vsyscall: Change the default vsyscall mode to xonly
The use case for full emulation over xonly is very esoteric, e.g. magic
instrumentation tools.
Change the default to the safer xonly mode.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Kernel Hardening <kernel-hardening@lists.openwall.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/30539f8072d2376b9c9efcc07e6ed0d6bf20e882.1561610354.git.luto@kernel.org
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 0182d2c67590..32028edc1b0e 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2285,7 +2285,7 @@ config COMPAT_VDSO choice prompt "vsyscall table for legacy applications" depends on X86_64 - default LEGACY_VSYSCALL_EMULATE + default LEGACY_VSYSCALL_XONLY help Legacy user code that does not know how to find the vDSO expects to be able to issue three syscalls by calling fixed addresses in |