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linux/drivers/virtio
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Vlastimil Babka 8f424750ba 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>
2020-12-15 12:13:46 -08:00
..
Kconfig vhost,vdpa,virtio: cleanups, fixes 2020-10-23 11:00:57 -07:00
Makefile virtio: fix build for configs without dma-bufs 2020-08-19 06:43:28 +02:00
virtio_balloon.c mm, page_poison: remove CONFIG_PAGE_POISONING_NO_SANITY 2020-12-15 12:13:46 -08:00
virtio_dma_buf.c virtio: fix build for configs without dma-bufs 2020-08-19 06:43:28 +02:00
virtio_input.c virtio_input: Constify id_table 2020-10-21 10:34:09 -04:00
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: check name when counting MSI-X vectors 2020-02-06 03:40:26 -05:00
virtio_pci_common.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 78 2019-05-24 17:37:51 +02:00
virtio_pci_legacy.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 78 2019-05-24 17:37:51 +02:00
virtio_pci_modern.c virtio: Implement get_shm_region for PCI transport 2020-09-10 10:05:58 +02:00
virtio_ring.c virtio: fixes, features 2020-08-11 14:34:17 -07:00
virtio_vdpa.c virtio_vdpa: legacy features handling 2020-08-05 11:08:40 -04:00
virtio.c vhost,vdpa,virtio: cleanups, fixes 2020-10-23 11:00:57 -07:00