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Increase the size of the OFW translations buffer to handle G5 systems

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that use many translation regions in firmware, and add bounds checking
to prevent buffer overflows in case even the new value is exceeded.

Reported by:	Jacob Lambert
MFC after:	3 days
This commit is contained in:
Nathan Whitehorn 2009-11-09 14:26:23 +00:00
parent 0d384326cd
commit f90550c2d2
1 changed files with 4 additions and 1 deletions
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5
sys/powerpc/aim/mmu_oea64.c
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@ -264,7 +264,7 @@ static struct mem_region *pregions;
extern u_int phys_avail_count;
extern int regions_sz, pregions_sz;
extern int ofw_real_mode;
static struct ofw_map translations[64];
static struct ofw_map translations[96];
extern struct pmap ofw_pmap;
@ -897,6 +897,9 @@ moea64_bridge_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernele
panic("moea64_bootstrap: can't get mmu package");
if ((sz = OF_getproplen(mmu, "translations")) == -1)
panic("moea64_bootstrap: can't get ofw translation count");
if (size > sizeof(translations))
panic("moea64_bootstrap: too many ofw translations (%d)",
sz/sizeof(*translations));
bzero(translations, sz);
if (OF_getprop(mmu, "translations", translations, sz) == -1)