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fix/kernel: Fixed issue regarding palloc(), we now fill the page with 0roes

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This commit is contained in:
Kevin Alavik 2025-05-15 21:15:32 +02:00
parent 9be94a75b0
commit 0aa7a96f7c
Signed by: cmpsb
GPG key ID: 10D1CC0526FDC6D7
1 changed files with 2 additions and 0 deletions
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2
kernel/src/mm/pmm.c
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@ -95,6 +95,7 @@ void *palloc(size_t pages, bool higher_half)
void *addr = (void *)(page_cache[--cache_index] * PAGE_SIZE); void *addr = (void *)(page_cache[--cache_index] * PAGE_SIZE);
bitmap_set(bitmap, (uint64_t)addr / PAGE_SIZE); bitmap_set(bitmap, (uint64_t)addr / PAGE_SIZE);
free_pages--; free_pages--;
memset(HIGHER_HALF(addr), 0, pages * PAGE_SIZE);
spinlock_release(&pmm_lock); spinlock_release(&pmm_lock);
return higher_half ? (void *)((uint64_t)addr + hhdm_offset) : addr; return higher_half ? (void *)((uint64_t)addr + hhdm_offset) : addr;
} }
@ -122,6 +123,7 @@ void *palloc(size_t pages, bool higher_half)
free_pages -= pages; free_pages -= pages;
void *addr = (void *)((start_bit + j - pages + 1) * PAGE_SIZE); void *addr = (void *)((start_bit + j - pages + 1) * PAGE_SIZE);
memset(HIGHER_HALF(addr), 0, pages * PAGE_SIZE);
spinlock_release(&pmm_lock); spinlock_release(&pmm_lock);
return higher_half ? (void *)((uint64_t)addr + hhdm_offset) : addr; return higher_half ? (void *)((uint64_t)addr + hhdm_offset) : addr;
} }