sys/linux/test: improve landlock_ptrace

When running syz-manager with -mode run-tests --tests landlock_ptrace -debug
we get this result:

  executing program
  ### start
  ### call=0 errno=0
  ### call=1 errno=0
  ### call=2 errno=0
  ### call=3 errno=0
  ### call=4 errno=3
  ### call=5 errno=0
  ### call=6 errno=0
  ### call=7 errno=0
  ### call=8 errno=1
  ### call=9 errno=0
  ### call=10 errno=0
  ### call=11 errno=3
  ### call=12 errno=0
  ### call=13 errno=0
  ### call=14 errno=1
  ### call=15 errno=3
  ### call=16 errno=1
  ### call=17 errno=0
  ### call=18 errno=3
  executing program
  ### start
  ### call=0 errno=0
  ### call=1 errno=0
  ### call=2 errno=0
  ### call=3 errno=0
  ### call=4 errno=0
  ### call=5 errno=0
  ### call=6 errno=0
  ### call=7 errno=0
  ### call=8 errno=1
  ### call=9 errno=3
  ### call=10 errno=0
  ### call=11 errno=3
  ### call=12 errno=0
  ### call=13 errno=0
  ### call=14 errno=1
  ### call=15 errno=3
  ### call=16 errno=1
  ### call=17 errno=0
  ### call=18 errno=3
  executing program
  ### start
  ### call=0 errno=0
  ### call=1 errno=0
  ### call=2 errno=0
  ### call=3 errno=0
  ### call=4 errno=3
  ### call=5 errno=0
  ### call=6 errno=0
  ### call=7 errno=0
  ### call=8 errno=1
  ### call=9 errno=0
  ### call=10 errno=0
  ### call=11 errno=3
  ### call=12 errno=0
  ### call=13 errno=0
  ### call=14 errno=1
  ### call=15 errno=3
  ### call=16 errno=1
  ### call=17 errno=0
  ### call=18 errno=3

Because this test spawns two threads, the ptrace(2) returned code may be
different according to the calling thread.

Set the common EPERM errnos for all three threads (EINTR is unknown to
syzkaller).  The other returned codes cannot be fixed because we cannot
have a set of valid errno for the same call.

Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com>

0 files changed, 0 insertions, 0 deletions