On Sat, Sep 19, 2020 at 01:06:36AM -0700, Kees Cook wrote: > Some archs (like powerpc) only support changing the return code during > syscall exit when ptrace is used. Test entry vs exit phases for which > portions of the syscall number and return values need to be set at which > different phases. For non-powerpc, all changes are made during ptrace > syscall entry, as before. For powerpc, the syscall number is changed at > ptrace syscall entry and the syscall return value is changed on ptrace > syscall exit. > > Reported-by: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx> > Suggested-by: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx> > Link: https://lore.kernel.org/linux-kselftest/20200911181012.171027-1-cascardo@xxxxxxxxxxxxx/ > Fixes: 58d0a862f573 ("seccomp: add tests for ptrace hole") > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> > --- Looks good! Acked-by: Christian Brauner <christian.brauner@xxxxxxxxxx>
