On 14/12/2023 8:00 pm, Christophe Leroy wrote:

Le 14/12/2023 à 06:55, Nicholas Miehlbradt a écrit :

quoted

Functions which walk the stack read parts of the stack which cannot be
instrumented by KMSAN e.g. the backchain. Disable KMSAN sanitization of
these functions to prevent false positives.

Do other architectures have to do it as well ?

I don't see it for show_stack(), is that a specific need for powerpc ?
Other archs have the annotation on functions called by show_stack(). For 

x86 it's on show_trace_log_lvl() and for s390 it's on __unwind_start() 
and unwind_next_frame().