From: Alexei Starovoitov ast@fb.com
commit 12a3cc8424fe1237aaeb982dec4f0914ddd22f3e upstream.
fix incorrect stack state prints in print_verifier_state()
Fixes: 638f5b90d460 ("bpf: reduce verifier memory consumption") Signed-off-by: Alexei Starovoitov ast@kernel.org Acked-by: John Fastabend john.fastabend@gmail.com Acked-by: Daniel Borkmann daniel@iogearbox.net Signed-off-by: Daniel Borkmann daniel@iogearbox.net Signed-off-by: Balbir Singh sblbir@amzn.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/bpf/verifier.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -268,7 +268,7 @@ static void print_verifier_state(struct for (i = 0; i < state->allocated_stack / BPF_REG_SIZE; i++) { if (state->stack[i].slot_type[0] == STACK_SPILL) verbose(" fp%d=%s", - -MAX_BPF_STACK + i * BPF_REG_SIZE, + (-i - 1) * BPF_REG_SIZE, reg_type_str[state->stack[i].spilled_ptr.type]); } verbose("\n");