Module protection#57
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Cu63 wants to merge 2 commits intom0nad:masterfrom
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Thanks for the PR. The reference link on README seems to be broken. Interesting technique, but I'm not full on-boarded. The reason is that I do not seek to add new functionalities to Diamorphine. Other PRs were rejected in the past for the same reason [#32 ]. Also, I don't know how this would keep the compatibility with older kernels and so on. |
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@m0nad
Add module protection against delete_module syscall
Introduces a protection mechanism that prevents the module from being
unloaded via
delete_moduleby manipulatingTHIS_MODULE->refcnt.While refcnt is non-zero, the kernel refuses to unload the module.
module_protect()— sets refcnt to a high value viaatomic_set()module_unprotect()— restores refcnt to 1