Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'slab-for-6.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab fix from Vlastimil Babka:
- Stable fix adding zero initialization of slab->obj_ext to prevent
crashes with allocation profiling (Suren Baghdasaryan)
* tag 'slab-for-6.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
slab: ensure slab->obj_exts is clear in a newly allocated slab page
+10
+10
mm/slub.c
+10
mm/slub.c
···
1973
1973
#define OBJCGS_CLEAR_MASK (__GFP_DMA | __GFP_RECLAIMABLE | \
1974
1974
__GFP_ACCOUNT | __GFP_NOFAIL)
1975
1975
1976
+
static inline void init_slab_obj_exts(struct slab *slab)
1977
+
{
1978
+
slab->obj_exts = 0;
1979
+
}
1980
+
1976
1981
int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s,
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1982
gfp_t gfp, bool new_slab)
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1983
{
···
2062
2057
}
2063
2058
2064
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#else /* CONFIG_SLAB_OBJ_EXT */
2060
+
2061
+
static inline void init_slab_obj_exts(struct slab *slab)
2062
+
{
2063
+
}
2065
2064
2066
2065
static int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s,
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2066
gfp_t gfp, bool new_slab)
···
2646
2637
slab->objects = oo_objects(oo);
2647
2638
slab->inuse = 0;
2648
2639
slab->frozen = 0;
2640
+
init_slab_obj_exts(slab);
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2641
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account_slab(slab, oo_order(oo), s, flags);
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