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slab fix for 6.18-rc5 

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Merge tag 'slab-for-6.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab

Pull slab fix from Vlastimil Babka:

 - Fix for potential infinite loop in kmalloc_nolock() when debugging
   is enabled for the cache (Vlastimil Babka)

* tag 'slab-for-6.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
  slab: prevent infinite loop in kmalloc_nolock() with debugging
This commit is contained in:
Linus Torvalds 2025-11-07 08:01:58 -08:00
parent 9dc520632a c379b745e1
commit a80abfbb10
1 changed files with 5 additions and 1 deletions
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6
mm/slub.c
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@ -4666,8 +4666,12 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
if (kmem_cache_debug(s)) {
freelist = alloc_single_from_new_slab(s, slab, orig_size, gfpflags);
if (unlikely(!freelist))
if (unlikely(!freelist)) {
/* This could cause an endless loop. Fail instead. */
if (!allow_spin)
return NULL;
goto new_objects;
}
if (s->flags & SLAB_STORE_USER)
set_track(s, freelist, TRACK_ALLOC, addr,