On Fri, Jan 22, 2021 at 12:58:58PM +0000, Will Deacon wrote: > On Tue, Oct 13, 2020 at 02:34:16AM +0100, Dmitry Safonov wrote: > > Don't allow splitting of vm_special_mapping's. > > It affects vdso/vvar areas. Uprobes have only one page in xol_area so > > they aren't affected. > > > > Those restrictions were enforced by checks in .mremap() callbacks. > > Restrict resizing with generic .split() callback. > > > > Signed-off-by: Dmitry Safonov <dima@xxxxxxxxxx> > > --- > > arch/arm/kernel/vdso.c | 9 --------- > > arch/arm64/kernel/vdso.c | 41 +++------------------------------------ > > arch/mips/vdso/genvdso.c | 4 ---- > > arch/s390/kernel/vdso.c | 11 +---------- > > arch/x86/entry/vdso/vma.c | 17 ---------------- > > mm/mmap.c | 12 ++++++++++++ > > 6 files changed, 16 insertions(+), 78 deletions(-) > > For arm64: > > Acked-by: Will Deacon <will@xxxxxxxxxx> Wait -- this got merged ages ago! Why am I reading such old email? Will
