• Andy Lutomirski's avatar
    x86/entry, selftests/x86: Add a test for 32-bit fast syscall arg faults · 5e5c684a
    Andy Lutomirski authored
    This test passes on 4.0 and fails on some newer kernels.
    Fortunately, the failure is likely not a big deal.
    
    This test will make sure that we don't break it further (e.g. OOPSing)
    as we clean up the entry code and that we eventually fix the
    regression.
    
    There's arguably no need to preserve the old ABI here --
    anything that makes it into a fast (vDSO) syscall with a bad
    stack is about to crash no matter what we do.
    Signed-off-by: default avatarAndy Lutomirski <luto@kernel.org>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: Denys Vlasenko <vda.linux@googlemail.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Kees Cook <keescook@chromium.org>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Oleg Nesterov <oleg@redhat.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Rik van Riel <riel@redhat.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: paulmck@linux.vnet.ibm.com
    Link: http://lkml.kernel.org/r/9cfcc51005168cb1b06b31991931214d770fc59a.1435952415.git.luto@kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    5e5c684a
syscall_arg_fault.c 3.5 KB