On (11/08/17 22:35), Steven Rostedt wrote: > On Thu, 9 Nov 2017 12:50:29 +1100 > "Tobin C. Harding" <m...@tobin.cc> wrote: > > > Currently if a pointer is printed using %p[ssB] and the symbol is not > > found (kallsyms_lookup() fails) then we print the actual address. This > > leaks kernel addresses. We should instead print something _safe_. > > > > Print "<no-symbol>" instead of kernel address. > > Ug, ftrace requires this to work as is, as it uses it to print some > addresses that may or may not be a symbol. > > If anything, can this return a success or failure if it were to find a > symbol or not, and then something like ftrace could decide to use %x if > it does not. > > And yes, ftrace leaks kernel addresses all over the place, that's just > the nature of tracing the kernel. >
agree, I kinda suspect that that "0x%lx" sometimes can be useful. at least one can tell if the frame is from modules or kernel, and objdump it may be. -ss