diff options
| author | Andy Lutomirski <luto@kernel.org> | 2022-05-11 10:38:53 -0700 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-05-11 20:39:31 +0200 |
| commit | bf00745e7791fe2ba7941aeead8528075a158bbe (patch) | |
| tree | c21f5fa4ccdc9310110c6ac7407de694041a1e20 /arch/x86/entry | |
| parent | c5eb0a61238dd6faf37f58c9ce61c9980aaffd7a (diff) | |
x86/vsyscall: Remove CONFIG_LEGACY_VSYSCALL_EMULATE
CONFIG_LEGACY_VSYSCALL_EMULATE is, as far as I know, only needed for the
combined use of exotic and outdated debugging mechanisms with outdated
binaries. At this point, no one should be using it. Eventually, dynamic
switching of vsyscalls will be implemented, but this is much more
complicated to support in EMULATE mode than XONLY mode.
So let's force all the distros off of EMULATE mode. If anyone actually
needs it, they can set vsyscall=emulate, and the kernel can then get
away with refusing to support newer security models if that option is
set.
[ bp: Remove "we"s. ]
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Florian Weimer <fweimer@redhat.com>
Link: https://lore.kernel.org/r/898932fe61db6a9d61bc2458fa2f6049f1ca9f5c.1652290558.git.luto@kernel.org
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/vsyscall/vsyscall_64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/entry/vsyscall/vsyscall_64.c b/arch/x86/entry/vsyscall/vsyscall_64.c index fd2ee9408e91..4af81df133ee 100644 --- a/arch/x86/entry/vsyscall/vsyscall_64.c +++ b/arch/x86/entry/vsyscall/vsyscall_64.c @@ -48,7 +48,7 @@ static enum { EMULATE, XONLY, NONE } vsyscall_mode __ro_after_init = #elif defined(CONFIG_LEGACY_VSYSCALL_XONLY) XONLY; #else - EMULATE; + #error VSYSCALL config is broken #endif static int __init vsyscall_setup(char *str) |