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Difference between revisions of "Vm map protect Patch"
(another public patch copied from Stefan Essers slides) |
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__text:8003E980 loc_8003E980 ; CODE XREF: _vm_map_protect+92↑j |
__text:8003E980 loc_8003E980 ; CODE XREF: _vm_map_protect+92↑j |
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__text:8003E980 LDR R1, =aVm_map_protect ; "vm_map_protect" |
__text:8003E980 LDR R1, =aVm_map_protect ; "vm_map_protect" |
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+ | __text:8003E982 BL sub_8001A9E0 |
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+ | __text:8003E986 BIC.W R5, R5, #4 <== replaced with NOP |
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+ | __text:8003E98A B loc_8003E944 |
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+ | __text:8003E98C ; --------------------------------------------------------------------------- |
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+ | [[Category:Kernel Patches]] |
Latest revision as of 07:12, 3 October 2011
- vm_map_protect disallows pages with both VM_PROT_WRITE and VM_PROT_EXECUTE
- when found VM_PROT_EXECUTE is cleared
- patch NOPs out the bit clearing
__text:8003E980 ; --------------------------------------------------------------------------- __text:8003E980 __text:8003E980 loc_8003E980 ; CODE XREF: _vm_map_protect+92↑j __text:8003E980 LDR R1, =aVm_map_protect ; "vm_map_protect" __text:8003E982 BL sub_8001A9E0 __text:8003E986 BIC.W R5, R5, #4 <== replaced with NOP __text:8003E98A B loc_8003E944 __text:8003E98C ; ---------------------------------------------------------------------------
