| 29 Oct 2024 |
 atemu12 | In reply to @oak:universumi.fi
I hope the issue is not inside the closed source binaries Given that it also affects stock ROM... | 01:01:32 |
 samueldr | it sure smells fishy | 01:01:54 |
 oak 🏳️🌈♥️ | It might be that the problematic code runs inside TEE | 01:02:03 |
| atemu12 | Ohoh | 01:02:13 |
| atemu12 | That could also be a state that I'd wipe by wiping userdata, huh | 01:02:32 |
| atemu12 | Because android would presumably re-init TEE state when it's got a clean slate | 01:02:54 |
| oak 🏳️🌈♥️ | Yeah it probably resets the Keystore / Keymaster at least | 01:04:12 |
| oak 🏳️🌈♥️ | Fairphone has Qualcomm chip so they are probably running QSEE | 01:04:32 |
| samueldr | that fairphone? (I forget which model is the latest) | 01:05:01 |
| samueldr | (I thought it was fairphone 5? and here remember FP4, but might be wrong?) | 01:05:21 |
| atemu12 | All of them run QC chips AFAIK | 01:05:30 |
| oak 🏳️🌈♥️ | * Fairphone 4 has Qualcomm chip so they are probably running QSEE | 01:05:22 |
| atemu12 | * All of them have QC chips AFAIK | 01:05:39 |
| samueldr | definitely not, initial ones were mediatek based | 01:05:51 |
| atemu12 | Oh indeed | 01:06:15 |
| samueldr | * definitely not, initial ones were mediatek based | 01:06:20 |
| atemu12 | The first one is MediaTek | 01:06:40 |
| samueldr | right, the last four were qualcomm | 01:06:47 |
| oak 🏳️🌈♥️ | I think Qualcomm announced recently they will lock the secure side of their SoCs so it's only going to be running TEE OS signed by Qualcomm keys in the future. Even for companies that make phones with those chips | 01:07:41 |
| oak 🏳️🌈♥️ | So phone makers won't be able to implement their own TEE OS on Qualcomm hardware | 01:08:16 |
| atemu12 | Is anyone actually doing that? | 01:08:29 |
| atemu12 | I'd assume everyone takes the vendor's software to get the device to work | 01:09:06 |
| oak 🏳️🌈♥️ | Well there are alternatives for what you can run as TEE OS using TrustZone | 01:09:08 |
| oak 🏳️🌈♥️ | Vendor's software is usually a pain | 01:09:50 |
| atemu12 | I believe that | 01:10:03 |
| oak 🏳️🌈♥️ | But yeah at least in the past Qualcomm was very bad at mainlining their stuff to kernel | 01:10:16 |
| oak 🏳️🌈♥️ | They basically just forked the kernel at some point and hacked it to work with their SoC | 01:10:53 |
| atemu12 | I think that's gotten better | 01:11:01 |
| atemu12 | LOS just pulls regular upstream 4.19 into the FP4 kernel repo | 01:11:41 |
| atemu12 | Straight from Greg | 01:12:00 |
