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lx_emul: align of page-size allocations properly

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Use page-alignment for multiple of page-size allocations within
all kmalloc allocations.

Ref genodelabs/genode#4795
This commit is contained in:
Stefan Kalkowski 2023-04-18 11:49:23 +02:00 committed by Christian Helmuth
parent 5080e88a7a
commit cad11093f1
1 changed files with 6 additions and 1 deletions
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7
repos/dde_linux/src/lib/lx_emul/shadow/mm/slub.c
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@ -33,6 +33,8 @@ void kfree(const void * x)
void * __kmalloc(size_t size, gfp_t flags)
{
unsigned long align = (unsigned long)ARCH_KMALLOC_MINALIGN;
/* Linux expects a non-NULL return value for size 0 */
if (size == 0)
size = 1;
@ -41,7 +43,10 @@ void * __kmalloc(size_t size, gfp_t flags)
if (flags & GFP_DMA)
lx_emul_trace_and_stop(__func__);
return lx_emul_mem_alloc_aligned(size, ARCH_KMALLOC_MINALIGN);
/* for page-rounded sizes use page-alignment */
if ((size % PAGE_SIZE) == 0) align = PAGE_SIZE;
return lx_emul_mem_alloc_aligned(size, align);
}