Hi jake, i am experiencing several issues with time_waste. At times, it causes my device to kernel panic whilst attempting to jailbreak, at other times it fails to jailbreak my device entirely.
My device is iOS 13.3 (iPad Air 2)
My question is, will you be working on a more successful rewrite of the exploit?
Thanks
As you can see from my error log it failed to get tfp0

I got these 11 errors when building on Xcode 11.3.1 it that all said "Undefined symbol" for a bunch of things. How can I fix these?:

Undefined symbols for architecture x86_64:
"_IOConnectCallAsyncStructMethod", referenced from:
_find_port_via_cuck00 in exploit.o
"_IOConnectAddClient", referenced from:
_init_IOAccelerator in IOAccelerator_stuff.o
"_IOConnectCallScalarMethod", referenced from:
_find_port_via_cuck00 in exploit.o
"_IOServiceMatching", referenced from:
_init_IOSurface in IOSurface_stuff.o
_init_IOAccelerator in IOAccelerator_stuff.o
"_kIOMasterPortDefault", referenced from:
_init_IOSurface in IOSurface_stuff.o
_init_IOAccelerator in IOAccelerator_stuff.o
"_IOObjectRelease", referenced from:
_term_IOSurface in IOSurface_stuff.o
_term_IOAccelerator in IOAccelerator_stuff.o
"_IOServiceClose", referenced from:
_term_IOSurface in IOSurface_stuff.o
_term_IOAccelerator in IOAccelerator_stuff.o
"_IOServiceGetMatchingService", referenced from:
_init_IOSurface in IOSurface_stuff.o
_init_IOAccelerator in IOAccelerator_stuff.o
"_IOServiceOpen", referenced from:
_init_IOSurface in IOSurface_stuff.o
_init_IOAccelerator in IOAccelerator_stuff.o
"_IOConnectCallAsyncMethod", referenced from:
_IOAccelCommandQueue2_set_notification_port in IOAccelerator_stuff.o
"_IOConnectCallMethod", referenced from:
_init_IOSurface in IOSurface_stuff.o
_IOSurface_setValue in IOSurface_stuff.o
_IOSurface_getValue in IOSurface_stuff.o
_IOSurface_removeValue in IOSurface_stuff.o
_IOAccelSharedUserClient2_create_shmem in IOAccelerator_stuff.o
_IOAccelSharedUserClient2_destroy_shmem in IOAccelerator_stuff.o
_IOAccelCommandQueue2_submit_command_buffers in IOAccelerator_stuff.o
...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

IOSurface_stuff contains undefined behavior that causes time_waste to crash when returning with compiler optimizatione enabled.

I'll keep looking but for now setting -O0 is required on IOSurface_stuff

Hi,jakea, the system reboot(kernel panic) due to a kernel data abort when I spawn a 3rd party process after the exploit successfully

I though that this update would help jailbreak iOS 13.3.1, iPhone XR but I might just be confused. I politely request you to try to jailbreak iOS 13.3.1. Thank you

I tried running this 6 times and 4/6 times I get:
[i] Offsets selected for iOS 12.0 or above
[] Initialized offsets
[] Initialized IOAccelerator
[i] page size: 0x4000
[] Initialized IOSurface
[] Doing stage 0 heap setup
[] Doing stage 1 heap setup
[] Triggering bug with 7 bytes
[] Corruption worked?
[] Freed kmsg
[+] ikm_header leak: 0xffffffe124a18028
[+] Segment list calculated to be at: 0xffffffe1189f0000
[+] fakeport: 0x6907
[+] Leaked port: 0xffffffe004764540
[-] Kernel read failed!

And 2/6 times I get a bunch of these messages and they never end until I stop it in Xcode:
[-] Probably won't work with this timestamp, retrying...
[-] Probably won't work with this timestamp, retrying...
[-] Probably won't work with this timestamp, retrying...
[-] Probably won't work with this timestamp, retrying...
[-] Probably won't work with this timestamp, retrying...
[-] Probably won't work with this timestamp, retrying...

[i] Offsets selected for iOS 12.0 or above
[] Initialized offsets
[] Initialized IOAccelerator
[i] page size: 0x1000
[] Initialized IOSurface
[] Doing stage 0 heap setup
[] Doing stage 1 heap setup
[] Triggering bug
[] Corruption worked?
[] Freed kmsg
[-][IOSurface] Failed to get value: 0xe00002db ((iokit/common) no space for data)
[-] Failed to read back value

iPhone XS iOS12.4 seems does not work?