Kernel crashes before stage 3

[wyatt-feng]

First of all, thank you for the excellent work and for publishing the PoC. I am trying to run the exploit on an Android emulator, but the kernel keeps crashing at the end of stage 2 before stage 3. Is this normal? Because line 637 in exp_pixel6.c says the second spray will crash the kernel.

The test architecture is x86_64 (I adapted function addr_to_page to x86_64 but it shouldn't affect stages before stage 4) and the kernel version is Linux localhost 5.10.43-android12-8-02397-g5c51579fde08-ab7526885 #1 SMP PREEMPT Tue Jul 6 21:24:20 UTC 2021 x86_64.

Thank you!