forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions
linux-uconsole/drivers/virtio
History
Vlastimil Babka 07f5a281d6 FROMGIT: mm, page_poison: remove CONFIG_PAGE_POISONING_NO_SANITY 
CONFIG_PAGE_POISONING_NO_SANITY skips the check on page alloc whether the
poison pattern was corrupted, suggesting a use-after-free.  The motivation
to introduce it in commit 8823b1dbc0 ("mm/page_poison.c: enable
PAGE_POISONING as a separate option") was to simply sanitize freed pages,
optimally together with CONFIG_PAGE_POISONING_ZERO.

These days we have an init_on_free=1 boot option, which makes this use
case of page poisoning redundant.  For sanitizing, writing zeroes is
sufficient, there is pretty much no benefit from writing the 0xAA poison
pattern to freed pages, without checking it back on alloc.  Thus, remove
this option and suggest init_on_free instead in the main config's help.

Link: https://lkml.kernel.org/r/20201113104033.22907-5-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Laura Abbott <labbott@kernel.org>
Cc: Mateusz Nosek <mateusznosek0@gmail.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit 8f424750ba
 https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git akpm)
Bug: 182930667
Signed-off-by: Alexander Potapenko <glider@google.com>
Change-Id: I2ecd65191b6954db33d22df9cab0eb11bd934b8a
2021-03-24 15:09:17 -07:00
..
Kconfig ANDROID: GKI: Unhide VIRTIO_DMA_SHARED_BUFFER 2020-12-16 09:28:07 -08:00
Makefile virtio: fix build for configs without dma-bufs 2020-08-19 06:43:28 +02:00
virtio.c vhost,vdpa,virtio: cleanups, fixes 2020-10-23 11:00:57 -07:00
virtio_balloon.c FROMGIT: mm, page_poison: remove CONFIG_PAGE_POISONING_NO_SANITY 2021-03-24 15:09:17 -07:00
virtio_dma_buf.c ANDROID: virtio: disable virtio_dma_buf callback checks with CFI 2021-01-28 22:14:14 +00:00
virtio_input.c Merge 1f70935f63 ("Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc") into android-mainline 2020-10-27 11:47:16 +01:00
virtio_mem.c vhost,vdpa,virtio: cleanups, fixes 2020-10-23 11:00:57 -07:00
virtio_mmio.c virtio: Implement get_shm_region for MMIO transport 2020-09-10 10:05:58 +02:00
virtio_pci_common.c
virtio_pci_common.h
virtio_pci_legacy.c
virtio_pci_modern.c virtio: Implement get_shm_region for PCI transport 2020-09-10 10:05:58 +02:00
virtio_ring.c virtio_ring: Fix two use after free bugs 2020-12-30 11:54:00 +01:00
virtio_vdpa.c virtio_vdpa: legacy features handling 2020-08-05 11:08:40 -04:00