Zev Weiss 907efa8839 ARM: prctl: reject PR_SET_MDWE on pre-ARMv6 ... commit 166ce846dc upstream. On v5 and lower CPUs we can't provide MDWE protection, so ensure we fail any attempt to enable it via prctl(PR_SET_MDWE). Previously such an attempt would misleadingly succeed, leading to any subsequent mmap(PROT_READ|PROT_WRITE) or execve() failing unconditionally (the latter somewhat violently via force_fatal_sig(SIGSEGV) due to READ_IMPLIES_EXEC). Link: https://lkml.kernel.org/r/20240227013546.15769-6-zev@bewilderbeest.net Signed-off-by: Zev Weiss <zev@bewilderbeest.net> Cc: <stable@vger.kernel.org> [6.3+] Cc: Borislav Petkov <bp@alien8.de> Cc: David Hildenbrand <david@redhat.com> Cc: Florent Revest <revest@chromium.org> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Kees Cook <keescook@chromium.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Ondrej Mosnacek <omosnace@redhat.com> Cc: Rick Edgecombe <rick.p.edgecombe@intel.com> Cc: Russell King (Oracle) <linux@armlinux.org.uk> Cc: Sam James <sam@gentoo.org> Cc: Stefan Roesch <shr@devkernel.io> Cc: Yang Shi <yang@os.amperecomputing.com> Cc: Yin Fengwei <fengwei.yin@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-04-03 15:28:54 +02:00
..
asm	ARM: prctl: reject PR_SET_MDWE on pre-ARMv6	2024-04-03 15:28:54 +02:00
debug	ARM: s3c: remove s3c24xx specific hacks	2023-01-16 09:26:05 +01:00
uapi/asm	arm: update in-source documentation references	2023-06-12 06:33:48 -06:00