Open shino-996 opened 3 years ago
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I found some case that vm_protect return KERN_SUCCESS , but memory don't set VM_PROT_WRITE success. like mprotect method
I found some case that vm_protect return KERN_SUCCESS , but memory don't set VM_PROT_WRITE success. like mprotect method
It seems a problem which hooking the same function in multithread. The memory was set write protection in a thread but hasn't written, while the same memory has set readonly protection back in other thread.
@grp are there plans to merge these PR's? Unfortunately, these are necessary for iOS 14.5+ usage of fishhook and are breaking our users.
The
mprotect
function requires the address to be page size aligned. In iOS 14.5 Beta, some addresses of sections of__DATA_CONST
and__AUTH_CONST
segments are not aligned to the page size, the write protection will be added failed, and then the process may crash when writing to these addresses. So we can usevm_protect
which not require the address to be page size aligned, instead ofmprotect
.Besides, the protection of different pages in a section may be not the same. So we need to pass the address to be written into
get_protection
, not the first address of the section.Fixed #80 and #82.