Prevent overflow with pre-allocated RAM blocks #1712
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wtdcode
reviewed
Sep 25, 2022
| @@ -1100,6 +1098,9 @@ RAMBlock *qemu_ram_alloc_from_ptr(struct uc_struct *uc, ram_addr_t size, void *h | |||
| new_block->host = host; | |||
| if (host) { | |||
| new_block->flags |= RAM_PREALLOC; | |||
| } else { | |||
| size = HOST_PAGE_ALIGN(uc, size); | |||
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The fix looks promising but assigning values to size and max_size seems doing nothing?
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Yes, you're right. The max_length assignment should have moved down as well.
|
Fixed in 32a3a68 |
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This is a proposed resolution for one of the test issues discussed in #1678. Not only does it fix the failing unit test on hosts with page size larger than 4K, I believe it also fixes a defect where pre-allocated RAM could be resized inadvertently beyond the actual allocated memory by the
HOST_PAGE_ALIGNmacro.