Harden switch_to_user (LVBS)#844
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🤖 SemverChecks 🤖 No breaking API changes detected Note: this does not mean API is unchanged, or even that there are no breaking changes; simply, none of the detections triggered. |
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This PR hardens LVBS's
switch_to_userby checking whether a given userrspis valid before switching back to the userspace. A valid userrspshould be a canonical userspace address. If not,iretqcould end up with a kernel exception.