diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-04-22 13:31:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-04-22 13:31:39 -0700 |
| commit | 22f19f67404833c2282b7a8c2f4703d9aff8f748 (patch) | |
| tree | 089aea35bc32e232c93270a9e4b365d3972330dc | |
| parent | 88c5060d56d8f756653bbee89fa45a752e241c9c (diff) | |
| parent | 63b1898fffcd8bd81905b95104ecc52b45a97e21 (diff) | |
Merge tag 'xarray-5.18a' of git://git.infradead.org/users/willy/xarray
Pull xarray fixes from Matthew Wilcox:
"Syzbot found a nasty race between large page splitting and page
lookup. Details in the commit log, but fortunately it has a reliable
reproducer. I thought it better to send this one to you straight away.
Also fix the test suite build for kmem_cache_alloc_lru()"
* tag 'xarray-5.18a' of git://git.infradead.org/users/willy/xarray:
XArray: Disallow sibling entries of nodes
tools: Add kmem_cache_alloc_lru()
| -rw-r--r-- | lib/xarray.c | 2 | ||||
| -rw-r--r-- | tools/include/linux/slab.h | 8 | ||||
| -rw-r--r-- | tools/testing/radix-tree/linux.c | 3 |
3 files changed, 11 insertions, 2 deletions
diff --git a/lib/xarray.c b/lib/xarray.c index 4acc88ea7c21..54e646e8e6ee 100644 --- a/lib/xarray.c +++ b/lib/xarray.c @@ -207,6 +207,8 @@ static void *xas_descend(struct xa_state *xas, struct xa_node *node) if (xa_is_sibling(entry)) { offset = xa_to_sibling(entry); entry = xa_entry(xas->xa, node, offset); + if (node->shift && xa_is_node(entry)) + entry = XA_RETRY_ENTRY; } xas->xa_offset = offset; diff --git a/tools/include/linux/slab.h b/tools/include/linux/slab.h index f41d8a0eb1a4..0616409513eb 100644 --- a/tools/include/linux/slab.h +++ b/tools/include/linux/slab.h @@ -28,7 +28,13 @@ static inline void *kzalloc(size_t size, gfp_t gfp) return kmalloc(size, gfp | __GFP_ZERO); } -void *kmem_cache_alloc(struct kmem_cache *cachep, int flags); +struct list_lru; + +void *kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *, int flags); +static inline void *kmem_cache_alloc(struct kmem_cache *cachep, int flags) +{ + return kmem_cache_alloc_lru(cachep, NULL, flags); +} void kmem_cache_free(struct kmem_cache *cachep, void *objp); struct kmem_cache *kmem_cache_create(const char *name, unsigned int size, diff --git a/tools/testing/radix-tree/linux.c b/tools/testing/radix-tree/linux.c index 81539f543954..d5c1bcba86fe 100644 --- a/tools/testing/radix-tree/linux.c +++ b/tools/testing/radix-tree/linux.c @@ -25,7 +25,8 @@ struct kmem_cache { void (*ctor)(void *); }; -void *kmem_cache_alloc(struct kmem_cache *cachep, int gfp) +void *kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *lru, + int gfp) { void *p; |