diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-07-18 10:36:11 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-07-18 10:36:11 -0300 |
| commit | 0698461ad2984892a47582a58eb235488d3aac7f (patch) | |
| tree | 107cfefee20b50f79cde3ed847f075bdbf50fad0 /mm/kfence/core.c | |
| parent | 0d2997f750d1de394231bc22768dab94a5b5db2f (diff) | |
| parent | ff6992735ade75aae3e35d16b17da1008d753d28 (diff) | |
Merge remote-tracking branch 'torvalds/master' into perf/core
To update the perf/core codebase.
Fix conflict by moving arch__post_evsel_config(evsel, attr) to the end
of evsel__config(), after what was added in:
49c692b7dfc9b6c0 ("perf offcpu: Accept allowed sample types only")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'mm/kfence/core.c')
| -rw-r--r-- | mm/kfence/core.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/mm/kfence/core.c b/mm/kfence/core.c index 4e7cd4c8e687..4b5e5a3d3a63 100644 --- a/mm/kfence/core.c +++ b/mm/kfence/core.c @@ -360,6 +360,9 @@ static void *kfence_guarded_alloc(struct kmem_cache *cache, size_t size, gfp_t g unsigned long flags; struct slab *slab; void *addr; + const bool random_right_allocate = prandom_u32_max(2); + const bool random_fault = CONFIG_KFENCE_STRESS_TEST_FAULTS && + !prandom_u32_max(CONFIG_KFENCE_STRESS_TEST_FAULTS); /* Try to obtain a free object. */ raw_spin_lock_irqsave(&kfence_freelist_lock, flags); @@ -404,7 +407,7 @@ static void *kfence_guarded_alloc(struct kmem_cache *cache, size_t size, gfp_t g * is that the out-of-bounds accesses detected are deterministic for * such allocations. */ - if (prandom_u32_max(2)) { + if (random_right_allocate) { /* Allocate on the "right" side, re-calculate address. */ meta->addr += PAGE_SIZE - size; meta->addr = ALIGN_DOWN(meta->addr, cache->align); @@ -444,7 +447,7 @@ static void *kfence_guarded_alloc(struct kmem_cache *cache, size_t size, gfp_t g if (cache->ctor) cache->ctor(addr); - if (CONFIG_KFENCE_STRESS_TEST_FAULTS && !prandom_u32_max(CONFIG_KFENCE_STRESS_TEST_FAULTS)) + if (random_fault) kfence_protect(meta->addr); /* Random "faults" by protecting the object. */ atomic_long_inc(&counters[KFENCE_COUNTER_ALLOCATED]); |