On Wed, Apr 5, 2017 at 1:36 PM, Mathias Krause <mini...@googlemail.com> wrote: > If either via kernel command line 'vdso32=' or via 'sysctl abi.vsyscall32' > vdso32_enabled gets set to a value below 0 or above 1, load_vdso32() won't > map the vDSO but ARCH_DLINFO_IA32 would still pass an AT_SYSINFO_EHDR > auxiliary vector, however with a NULL pointer. That'll make any program > trying to make use of it fail with a segmentation fault. At least musl > makes use of it if the kernel provides it. > > Ensure vdso32_enabled gets set to valid values only to fix this corner > case.
Acked-by: Andy Lutomirski <l...@kernel.org>
