alloc_slab_obj_exts() should mark failed obj_exts vector allocations independent on whether the vector is being allocated for a new or an existing slab. Current implementation skips doing this for existing slabs. Fix this by marking failed allocations unconditionally.

Fixes: 09c46563ff6d ("codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocations") Reported-by: Shakeel Butt shakeel.butt@linux.dev Closes: https://lore.kernel.org/all/avhakjldsgczmq356gkwmvfilyvf7o6temvcmtt5lqd4fhp5... Signed-off-by: Suren Baghdasaryan surenb@google.com Cc: stable@vger.kernel.org # v6.10+ --- mm/slub.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c index af343ca570b5..cab4e7822393 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2029,8 +2029,7 @@ int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s, slab_nid(slab)); if (!vec) { /* Mark vectors which failed to allocate */ - if (new_slab) - mark_failed_objexts_alloc(slab); + mark_failed_objexts_alloc(slab);

return -ENOMEM; }