Saurik acknowledges Cydia Substrate freezing bug in latest update, says fix is imminent

Less than 2 weeks ago, Saurik (Jay Freeman) released an official iOS 11-centric update for Cydia Substrate, but it wasn’t long afterward the release that users who installed the parcel began reporting unexpected freezing issues amongst their jailbroken handsets.

A back upwards thread was opened on GitHub nine days agone brought but about much-needed attending to the issue, prompting high-profile members of the community similar Pwn20wnd, sbingner, together with Saurik to get looking into it.

Fortunately for Cydia Substrate users, it right away seems that Saurik is aware of the occupation together with successfully replicated the consequence on i of his examination devices, an essential kickoff footstep inwards troubleshooting together with fixing the bug.

Saurik’s official answer was published equally a comment inwards the relevant back upwards thread, together with we’ve quoted it for you lot below:

OK, I’ve managed to replicate the consequence inwards that thread: thank you lot for the clear steps to reproduce the issue! At its core, this behaviour happens because amfid together with substrated are beingness killed at the same fourth dimension (which it would move squeamish to but avoid equally much equally possible, but I convey thence far totally failed to brand JetsamPriority protect my process; before versions of substrated weren’t using launchd: I wonder if that mightiness convey helped protect it, but I don’t know plenty well-nigh Jetsam); but like, equally what Substrate is doing (and has been for years now) is essentially using amfid to provision executable pages, it fails to initialize itself (because, together with this is silly, it accidentally needs executable pages to run at all? this is trivially fixable) together with and thence (theoretically, if it got this far, which it doesn’t) fails to claw the xpcproxy for amfid (as I’m doing this using “the sum machinery”, which needs executable pages). I mean value I volition convey but about fourth dimension to cook both of these issues tomorrow black (I tin furnish a to a greater extent than express claw for xpcproxy together with and thence special-case amfid).

We tin assemble from Saurik’s comment that the freezing consequence was in all probability related to 2 processes – amfid together with substrated – beingness killed simultaneously.

Saurik expects to force an update for Cydia Substrate via Cydia one-time this calendar week that volition cook the described issue, which should theoretically lay an destination to the freezing but about users convey reported.

As always, we’ll proceed to hold you lot updated equally to a greater extent than well-nigh this update surfaces, thence hold it tuned to iDB to acquire well-nigh the latest jailbreak news.

Have you lot experienced the Cydia Substrate freezing consequence on your jailbroken device since the update? Let us know inwards the comments department below.

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