diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.kasan | 7 | ||||
| -rw-r--r-- | lib/crypto/mpi/mpi-mul.c | 2 | ||||
| -rw-r--r-- | lib/iov_iter.c | 25 | ||||
| -rw-r--r-- | lib/objpool.c | 18 | ||||
| -rw-r--r-- | lib/slub_kunit.c | 2 |
5 files changed, 31 insertions, 23 deletions
diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan index 233ab2096924..98016e137b7f 100644 --- a/lib/Kconfig.kasan +++ b/lib/Kconfig.kasan @@ -22,11 +22,8 @@ config ARCH_DISABLE_KASAN_INLINE config CC_HAS_KASAN_GENERIC def_bool $(cc-option, -fsanitize=kernel-address) -# GCC appears to ignore no_sanitize_address when -fsanitize=kernel-hwaddress -# is passed. See https://bugzilla.kernel.org/show_bug.cgi?id=218854 (and -# the linked LKML thread) for more details. config CC_HAS_KASAN_SW_TAGS - def_bool !CC_IS_GCC && $(cc-option, -fsanitize=kernel-hwaddress) + def_bool $(cc-option, -fsanitize=kernel-hwaddress) # This option is only required for software KASAN modes. # Old GCC versions do not have proper support for no_sanitize_address. @@ -101,7 +98,7 @@ config KASAN_SW_TAGS help Enables Software Tag-Based KASAN. - Requires Clang. + Requires GCC 11+ or Clang. Supported only on arm64 CPUs and relies on Top Byte Ignore. diff --git a/lib/crypto/mpi/mpi-mul.c b/lib/crypto/mpi/mpi-mul.c index 892a246216b9..7e6ff1ce3e9b 100644 --- a/lib/crypto/mpi/mpi-mul.c +++ b/lib/crypto/mpi/mpi-mul.c @@ -21,7 +21,7 @@ int mpi_mul(MPI w, MPI u, MPI v) int usign, vsign, sign_product; int assign_wp = 0; mpi_ptr_t tmp_limb = NULL; - int err; + int err = 0; if (u->nlimbs < v->nlimbs) { /* Swap U and V. */ diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 1abb32c0da50..908e75a28d90 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -461,6 +461,8 @@ size_t copy_page_from_iter_atomic(struct page *page, size_t offset, size_t bytes, struct iov_iter *i) { size_t n, copied = 0; + bool uses_kmap = IS_ENABLED(CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP) || + PageHighMem(page); if (!page_copy_sane(page, offset, bytes)) return 0; @@ -471,7 +473,7 @@ size_t copy_page_from_iter_atomic(struct page *page, size_t offset, char *p; n = bytes - copied; - if (PageHighMem(page)) { + if (uses_kmap) { page += offset / PAGE_SIZE; offset %= PAGE_SIZE; n = min_t(size_t, n, PAGE_SIZE - offset); @@ -482,7 +484,7 @@ size_t copy_page_from_iter_atomic(struct page *page, size_t offset, kunmap_atomic(p); copied += n; offset += n; - } while (PageHighMem(page) && copied != bytes && n > 0); + } while (uses_kmap && copied != bytes && n > 0); return copied; } @@ -1021,15 +1023,18 @@ static ssize_t iter_folioq_get_pages(struct iov_iter *iter, size_t offset = iov_offset, fsize = folioq_folio_size(folioq, slot); size_t part = PAGE_SIZE - offset % PAGE_SIZE; - part = umin(part, umin(maxsize - extracted, fsize - offset)); - count -= part; - iov_offset += part; - extracted += part; + if (offset < fsize) { + part = umin(part, umin(maxsize - extracted, fsize - offset)); + count -= part; + iov_offset += part; + extracted += part; + + *pages = folio_page(folio, offset / PAGE_SIZE); + get_page(*pages); + pages++; + maxpages--; + } - *pages = folio_page(folio, offset / PAGE_SIZE); - get_page(*pages); - pages++; - maxpages--; if (maxpages == 0 || extracted >= maxsize) break; diff --git a/lib/objpool.c b/lib/objpool.c index 234f9d0bd081..b998b720c732 100644 --- a/lib/objpool.c +++ b/lib/objpool.c @@ -74,15 +74,21 @@ objpool_init_percpu_slots(struct objpool_head *pool, int nr_objs, * warm caches and TLB hits. in default vmalloc is used to * reduce the pressure of kernel slab system. as we know, * mimimal size of vmalloc is one page since vmalloc would - * always align the requested size to page size + * always align the requested size to page size. + * but if vmalloc fails or it is not available (e.g. GFP_ATOMIC) + * allocate percpu slot with kmalloc. */ - if (pool->gfp & GFP_ATOMIC) - slot = kmalloc_node(size, pool->gfp, cpu_to_node(i)); - else + slot = NULL; + + if ((pool->gfp & (GFP_ATOMIC | GFP_KERNEL)) != GFP_ATOMIC) slot = __vmalloc_node(size, sizeof(void *), pool->gfp, cpu_to_node(i), __builtin_return_address(0)); - if (!slot) - return -ENOMEM; + + if (!slot) { + slot = kmalloc_node(size, pool->gfp, cpu_to_node(i)); + if (!slot) + return -ENOMEM; + } memset(slot, 0, size); pool->cpu_slots[i] = slot; diff --git a/lib/slub_kunit.c b/lib/slub_kunit.c index 80e39f003344..33564f965958 100644 --- a/lib/slub_kunit.c +++ b/lib/slub_kunit.c @@ -141,7 +141,7 @@ static void test_kmalloc_redzone_access(struct kunit *test) { struct kmem_cache *s = test_kmem_cache_create("TestSlub_RZ_kmalloc", 32, SLAB_KMALLOC|SLAB_STORE_USER|SLAB_RED_ZONE); - u8 *p = __kmalloc_cache_noprof(s, GFP_KERNEL, 18); + u8 *p = alloc_hooks(__kmalloc_cache_noprof(s, GFP_KERNEL, 18)); kasan_disable_current(); |