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CVE-2022-38691/38692

persistently boot FDL1/SPL without signature

NOTE: first remove sign check of Boot Chain images in FDL1/SPL, then

patcher <cfg> <unsigned_fdl1_spl>
soc status
sc9820e/sc9832e affected but code has not been written yet
sc9863a affected but code has not been written yet
ud710 working
udx710 affected but can't be supported (stack is at 0x3010-0x4000, g_n is at 0x28004898, g_sig is at 0x280049A8)
ums312 working
ums512 working
ums9230 unaffected
ums9620 unaffected
ums9621 unaffected

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