mm: zswap: warn when referencing a dead entry
Put a standard sanity check on zswap_entry_get() for UAF scenario. Link: https://lkml.kernel.org/r/20240130014208.565554-5-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Nhat Pham <nphamcs@gmail.com> Acked-by: Yosry Ahmed <yosryahmed@google.com> Reviewed-by: Chengming Zhou <zhouchengming@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
parent
7dd1f7f0fc
commit
e477559ca6
@ -541,6 +541,7 @@ static void zswap_entry_free(struct zswap_entry *entry)
|
||||
/* caller must hold the tree lock */
|
||||
static void zswap_entry_get(struct zswap_entry *entry)
|
||||
{
|
||||
WARN_ON_ONCE(!entry->refcount);
|
||||
entry->refcount++;
|
||||
}
|
||||
|
||||
|
Loading…
x
Reference in New Issue
Block a user