Hi,

are there any known race conditions in IPC/PS that affect TF-M 1.4-ish?

More specifically TF-M revision a199c3047f320a2f82b9a0c27af5b50991184e0f, which

is 38 commits prior to TF-Mv1.4.0-RC1.

I am observing that adding printfs, or otherwise changing the flash alignment and therefore runtime of my code will affect whether the PS reliability test suite passes or not.

More specifically, if it triggers a secure fault after x iterations of 2001, or y iterations of 2002, etc. depending on where I put my printfs or otherwise affect the alignment of the code.

This is run on the nrf platform as a part of the nrf SDK.

Test Suite PS reliability tests (TFM_PS_TEST_2XXX)...
'repetitive sets and gets in/from an asset'
'repetitive sets, gets and removes'

It does not reproduce under GDB and I am unable to unwind the backtrace from the secure fault handler. Any tips about recovering a backtrace from a secure fault handler would also be appreciated.

#0  SecureFault_Handler ()
    at /home/sebo/ncs/modules/tee/tfm/trusted-firmware-m/secure_fw/spm/cmsis_psa/arch/tfm_arch_v8m_main.c:96
#1  0xffffffb4 in ?? ()

I have not been able to reproduce it in the latest upstream TF-M release/revision, but that could just be because I haven't been able to hit the race condition.