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| author | Andrey Konovalov <[email protected]> | 2022-01-14 22:05:01 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2022-01-15 14:30:26 +0000 |
| commit | 26dca996ea7b1ac7008b6b6063fc88b849e3ac3e (patch) | |
| tree | cba343dcba067570b75226033f93f85de5310c17 /mm/debug.c | |
| parent | kasan: test: add test case for double-kmem_cache_destroy() (diff) | |
| download | kernel-26dca996ea7b1ac7008b6b6063fc88b849e3ac3e.tar.gz kernel-26dca996ea7b1ac7008b6b6063fc88b849e3ac3e.zip | |
kasan: fix quarantine conflicting with init_on_free
KASAN's quarantine might save its metadata inside freed objects. As
this happens after the memory is zeroed by the slab allocator when
init_on_free is enabled, the memory coming out of quarantine is not
properly zeroed.
This causes lib/test_meminit.c tests to fail with Generic KASAN.
Zero the metadata when the object is removed from quarantine.
Link: https://lkml.kernel.org/r/2805da5df4b57138fdacd671f5d227d58950ba54.1640037083.git.andreyknvl@google.com
Fixes: 6471384af2a6 ("mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options")
Signed-off-by: Andrey Konovalov <[email protected]>
Reviewed-by: Marco Elver <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'mm/debug.c')
0 files changed, 0 insertions, 0 deletions