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| author | Mohammed EL Kadiri <med08elkadiri@gmail.com> | 2026-06-10 07:50:52 +0100 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko@kernel.org> | 2026-06-15 15:19:13 +0300 |
| commit | 0934c38b12bd838cc133d5895fc8b42c2c1717ee (patch) | |
| tree | 5b459f86e1f72e2299370f46b1935a4007e87a36 /security/keys | |
| parent | 44b9597fea4b4d6d79d8b70a297ea425e05543c1 (diff) | |
| download | linux-next-0934c38b12bd838cc133d5895fc8b42c2c1717ee.tar.gz linux-next-0934c38b12bd838cc133d5895fc8b42c2c1717ee.zip | |
keys: prevent slab cache merging for key_jar
Add SLAB_NO_MERGE to key_jar to prevent the allocator from merging it
with other similarly-sized caches. This hardens struct key isolation by
ensuring dedicated slab pages.
Acked-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Signed-off-by: Mohammed EL Kadiri <med08elkadiri@gmail.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lore.kernel.org/r/20260610065052.9120-1-med08elkadiri@gmail.com
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Diffstat (limited to 'security/keys')
| -rw-r--r-- | security/keys/key.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/security/keys/key.c b/security/keys/key.c index 091ee084bc30..b34a64d81d47 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -1275,7 +1275,7 @@ void __init key_init(void) { /* allocate a slab in which we can store keys */ key_jar = kmem_cache_create("key_jar", sizeof(struct key), - 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); + 0, SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_NO_MERGE, NULL); /* add the special key types */ list_add_tail(&key_type_keyring.link, &key_types_list); |