diff options
Diffstat (limited to 'src/H5HLcache.c')
-rw-r--r-- | src/H5HLcache.c | 64 |
1 files changed, 34 insertions, 30 deletions
diff --git a/src/H5HLcache.c b/src/H5HLcache.c index 72af9b4..c04efb6 100644 --- a/src/H5HLcache.c +++ b/src/H5HLcache.c @@ -13,10 +13,8 @@ /*------------------------------------------------------------------------- * * Created: H5HLcache.c - * Feb 5 2008 - * Quincey Koziol * - * Purpose: Implement local heap metadata cache methods. + * Purpose: Implement local heap metadata cache methods * *------------------------------------------------------------------------- */ @@ -81,7 +79,8 @@ static herr_t H5HL__cache_datablock_notify(H5C_notify_action_t action, void *_th static herr_t H5HL__cache_datablock_free_icr(void *thing); /* Header deserialization */ -static herr_t H5HL__hdr_deserialize(H5HL_t *heap, const uint8_t *image, H5HL_cache_prfx_ud_t *udata); +static herr_t H5HL__hdr_deserialize(H5HL_t *heap, const uint8_t *image, size_t len, + H5HL_cache_prfx_ud_t *udata); /* Free list de/serialization */ static herr_t H5HL__fl_deserialize(H5HL_t *heap); @@ -137,38 +136,39 @@ const H5AC_class_t H5AC_LHEAP_DBLK[1] = {{ /*------------------------------------------------------------------------- * Function: H5HL__hdr_deserialize() * - * Purpose: Decode a local heap's header - * - * Return: Success: SUCCEED - * Failure: FAIL - * - * Programmer: Quincey Koziol - * December 15, 2016 + * Purpose: Decode a local heap's header * + * Return: SUCCEED/FAIL *------------------------------------------------------------------------- */ static herr_t -H5HL__hdr_deserialize(H5HL_t *heap, const uint8_t *image, H5HL_cache_prfx_ud_t *udata) +H5HL__hdr_deserialize(H5HL_t *heap, const uint8_t *image, size_t len, H5HL_cache_prfx_ud_t *udata) { - herr_t ret_value = SUCCEED; /* Return value */ + const uint8_t *p_end = image + len - 1; /* End of image buffer */ + herr_t ret_value = SUCCEED; FUNC_ENTER_PACKAGE - /* Sanity checks */ HDassert(heap); HDassert(image); HDassert(udata); - /* Check magic number */ + /* Magic number */ + if (H5_IS_BUFFER_OVERFLOW(image, H5_SIZEOF_MAGIC, p_end)) + HGOTO_ERROR(H5E_HEAP, H5E_OVERFLOW, FAIL, "ran off end of input buffer while decoding"); if (HDmemcmp(image, H5HL_MAGIC, (size_t)H5_SIZEOF_MAGIC) != 0) HGOTO_ERROR(H5E_HEAP, H5E_BADVALUE, FAIL, "bad local heap signature") image += H5_SIZEOF_MAGIC; /* Version */ + if (H5_IS_BUFFER_OVERFLOW(image, 1, p_end)) + HGOTO_ERROR(H5E_HEAP, H5E_OVERFLOW, FAIL, "ran off end of input buffer while decoding"); if (H5HL_VERSION != *image++) HGOTO_ERROR(H5E_HEAP, H5E_VERSION, FAIL, "wrong version number in local heap") /* Reserved */ + if (H5_IS_BUFFER_OVERFLOW(image, 3, p_end)) + HGOTO_ERROR(H5E_HEAP, H5E_OVERFLOW, FAIL, "ran off end of input buffer while decoding"); image += 3; /* Store the prefix's address & length */ @@ -176,14 +176,20 @@ H5HL__hdr_deserialize(H5HL_t *heap, const uint8_t *image, H5HL_cache_prfx_ud_t * heap->prfx_size = udata->sizeof_prfx; /* Heap data size */ + if (H5_IS_BUFFER_OVERFLOW(image, udata->sizeof_size, p_end)) + HGOTO_ERROR(H5E_HEAP, H5E_OVERFLOW, FAIL, "ran off end of input buffer while decoding"); H5F_DECODE_LENGTH_LEN(image, heap->dblk_size, udata->sizeof_size); /* Free list head */ + if (H5_IS_BUFFER_OVERFLOW(image, udata->sizeof_size, p_end)) + HGOTO_ERROR(H5E_HEAP, H5E_OVERFLOW, FAIL, "ran off end of input buffer while decoding"); H5F_DECODE_LENGTH_LEN(image, heap->free_block, udata->sizeof_size); if (heap->free_block != H5HL_FREE_NULL && heap->free_block >= heap->dblk_size) HGOTO_ERROR(H5E_HEAP, H5E_BADVALUE, FAIL, "bad heap free list") /* Heap data address */ + if (H5_IS_BUFFER_OVERFLOW(image, udata->sizeof_addr, p_end)) + HGOTO_ERROR(H5E_HEAP, H5E_OVERFLOW, FAIL, "ran off end of input buffer while decoding"); H5F_addr_decode_len(udata->sizeof_addr, &image, &(heap->dblk_addr)); done: @@ -344,8 +350,7 @@ H5HL__cache_prefix_get_initial_load_size(void H5_ATTR_UNUSED *_udata, size_t *im *------------------------------------------------------------------------- */ static herr_t -H5HL__cache_prefix_get_final_load_size(const void *_image, size_t H5_ATTR_NDEBUG_UNUSED image_len, - void *_udata, size_t *actual_len) +H5HL__cache_prefix_get_final_load_size(const void *_image, size_t image_len, void *_udata, size_t *actual_len) { const uint8_t *image = (const uint8_t *)_image; /* Pointer into raw data buffer */ H5HL_cache_prfx_ud_t *udata = (H5HL_cache_prfx_ud_t *)_udata; /* User data for callback */ @@ -363,7 +368,7 @@ H5HL__cache_prefix_get_final_load_size(const void *_image, size_t H5_ATTR_NDEBUG HDmemset(&heap, 0, sizeof(H5HL_t)); /* Deserialize the heap's header */ - if (H5HL__hdr_deserialize(&heap, (const uint8_t *)image, udata) < 0) + if (H5HL__hdr_deserialize(&heap, (const uint8_t *)image, image_len, udata) < 0) HGOTO_ERROR(H5E_HEAP, H5E_CANTDECODE, FAIL, "can't decode local heap header") /* Set the final size for the cache image */ @@ -383,25 +388,22 @@ done: /*------------------------------------------------------------------------- * Function: H5HL__cache_prefix_deserialize * - * Purpose: Given a buffer containing the on disk image of the local - * heap prefix, deserialize it, load its contents into a newly allocated - * instance of H5HL_prfx_t, and return a pointer to the new instance. - * - * Return: Success: Pointer to in core representation - * Failure: NULL - * - * Programmer: John Mainzer - * 6/21/14 + * Purpose: Given a buffer containing the on disk image of the local + * heap prefix, deserialize it, load its contents into a newly + * allocated instance of H5HL_prfx_t, and return a pointer to + * the new instance. * + * Return: Success: Pointer to in core representation + * Failure: NULL *------------------------------------------------------------------------- */ static void * -H5HL__cache_prefix_deserialize(const void *_image, size_t H5_ATTR_NDEBUG_UNUSED len, void *_udata, - hbool_t H5_ATTR_UNUSED *dirty) +H5HL__cache_prefix_deserialize(const void *_image, size_t len, void *_udata, hbool_t H5_ATTR_UNUSED *dirty) { H5HL_t *heap = NULL; /* Local heap */ H5HL_prfx_t *prfx = NULL; /* Heap prefix deserialized */ const uint8_t *image = (const uint8_t *)_image; /* Pointer into decoding buffer */ + const uint8_t *p_end = image + len - 1; /* End of image buffer */ H5HL_cache_prfx_ud_t *udata = (H5HL_cache_prfx_ud_t *)_udata; /* User data for callback */ void *ret_value = NULL; /* Return value */ @@ -422,7 +424,7 @@ H5HL__cache_prefix_deserialize(const void *_image, size_t H5_ATTR_NDEBUG_UNUSED HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, NULL, "can't allocate local heap structure"); /* Deserialize the heap's header */ - if (H5HL__hdr_deserialize(heap, (const uint8_t *)image, udata) < 0) + if (H5HL__hdr_deserialize(heap, (const uint8_t *)image, len, udata) < 0) HGOTO_ERROR(H5E_HEAP, H5E_CANTDECODE, NULL, "can't decode local heap header") /* Allocate the heap prefix */ @@ -446,6 +448,8 @@ H5HL__cache_prefix_deserialize(const void *_image, size_t H5_ATTR_NDEBUG_UNUSED image = ((const uint8_t *)_image) + heap->prfx_size; /* Copy the heap data from the speculative read buffer */ + if (H5_IS_BUFFER_OVERFLOW(image, heap->dblk_size, p_end)) + HGOTO_ERROR(H5E_HEAP, H5E_OVERFLOW, NULL, "ran off end of input buffer while decoding"); H5MM_memcpy(heap->dblk_image, image, heap->dblk_size); /* Build free list */ |