bpf: Add missed newline in verifier verbose log

check_stack_access() that prints verbose log is used in
adjust_ptr_min_max_vals() that prints its own verbose log and now they
stick together, e.g.:

  variable stack access var_off=(0xfffffffffffffff0; 0x4) off=-16
  size=1R2 stack pointer arithmetic goes out of range, prohibited for
  !root

Add missing newline so that log is more readable:
  variable stack access var_off=(0xfffffffffffffff0; 0x4) off=-16 size=1
  R2 stack pointer arithmetic goes out of range, prohibited for !root

Fixes: f1174f77b50c ("bpf/verifier: rework value tracking")
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index f2d600199e66edd2229e88f0d06e0ab00674cc1c..48718e1da16d968aedc05c23097bb7f8be662a6a 100644 (file)
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -1426,7 +1426,7 @@ static int check_stack_access(struct bpf_verifier_env *env,
                char tn_buf[48];
 
                tnum_strn(tn_buf, sizeof(tn_buf), reg->var_off);
-               verbose(env, "variable stack access var_off=%s off=%d size=%d",
+               verbose(env, "variable stack access var_off=%s off=%d size=%d\n",
                        tn_buf, off, size);
                return -EACCES;
        }