[MT6761] BPF broken on Android 15+ (no Wi-Fi); Bluetooth crashes on Android 14

[TuxOSDev]

Device: Oukitel WP5
SoC: MediaTek MT6761 (Helio A22)
Stock kernel: 4.19 (Android 11)

Issue:

• On TrebleDroid Android 15+ GSI: Wi-Fi does not work due to a BPF (Berkeley Packet Filter) bug.
• On TrebleDroid Android 14 GSI: Wi-Fi works normally, but Bluetooth crashes repeatedly.

Expected behavior:
Both Wi-Fi and Bluetooth functional on Android 14–15.

Actual behavior:

• Android 15+: BPF failure → no Wi-Fi.
• Android 14: Bluetooth crashes, Wi-Fi OK.

Stock Android 11 works fine for both. This is 100% reproducible on this device.

Request:
Any guidance on possible fixes (kernel patches, BPF backports, build flags) would be appreciated.

[olivia1246]

Hello, I believe you need this patcher for the kernel. I've used this on a MT6762 device with A11 vendor and kernel 4.19.127. Pre-patch it could connect to Wi-Fi however it didn't have a real internet connection. Post-patch Wi-Fi works perfectly. I am unsure about Bluetooth as I haven't tested it but this should atleast fix Wi-Fi.
https://github.com/R0rt1z2/mtk-bpf-patcher

[TuxOSDev]

Hello, I believe you need this patcher for the kernel. I've used this on a MT6762 device with A11 vendor and kernel 4.19.127. Pre-patch it could connect to Wi-Fi however it didn't have a real internet connection. Post-patch Wi-Fi works perfectly. I am unsure about Bluetooth as I haven't tested it but this should atleast fix Wi-Fi. https://github.com/R0rt1z2/mtk-bpf-patcher

PS C:\Users\bigboss\bpffix> python -m mtk_bpf_patcher.main -d -l patchlog.txt original_boot.img patched_boot.img
C:\Users\bigboss\AppData\Local\Programs\Python\Python313\Lib\site-packages\mtk_bpf_patcher\utils\logger.py:55: SyntaxWarning: invalid escape sequence '['
self.log_handle.write(re.sub("\033[[0-9;]*m", "", message) + "\n")
C:\Users\bigboss\AppData\Local\Programs\Python\Python313\Lib\site-packages\mtk_bpf_patcher\utils\logger.py:68: SyntaxWarning: invalid escape sequence '|'
print(" | '_ | '_ | |_ | '_ \ / ` | _/ | ' \ / _ \ '|")
C:\Users\bigboss\AppData\Local\Programs\Python\Python313\Lib\site-packages\mtk_bpf_patcher\utils\logger.py:70: SyntaxWarning: invalid escape sequence '_'
print(" |./| ./|| | .__/ _,|__|| ||_|_| ")

---

| |__ _ __ / | _ __ __ | | | | ___ _ __
| ' | ' | |_ | '_ \ / ` | _/ | ' \ / _ \ '|
| |) | |) | | | |) | (| | || (| | | | / |
|_./| ./|| | .__/ _,|__|| ||_||
|| || || made by @R0rt1z2

[?] Detected BOOT_IMAGE for original_boot.img!
[!] Extracting kernel from C:\Users\bigboss\bpffix\original_boot.img...
[] Could not find '0a2450292801080a087d0a1b28010035' in the kernel data!
[] Could not find '48010035822240b980420491e10313aa' in the kernel data!
[x] Unable to find a match for any of the sequences :(
PS C:\Users\bigboss\bpffix>

[olivia1246]

Maybe this patcher isn't compatible with your device at the moment as I did have the same output on some other MT6739 4.19 kernel device when I tried it some time ago.
I'm unsure how to help you with this further as I do not have any skills in patching kernels but maybe submitting or looking at the issues they have there might help.

[TuxOSDev]

Maybe this patcher isn't compatible with your device at the moment as I did have the same output on some other MT6739 4.19 kernel device when I tried it some time ago. I'm unsure how to help you with this further as I do not have any skills in patching kernels but maybe submitting or looking at the issues they have there might help.

Still thanks for trying to help.