[PATCH][next] bpf: fix swapped arguments in calls to check_buffer_access

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

There are a couple of arguments of the boolean flag zero_size_allowed
and the char pointer buf_info when calling to function check_buffer_access
that are swapped by mistake. Fix these by swapping them to correct
the argument ordering.

Addresses-Coverity: ("Array compared to 0")
Fixes: afbf21dce668 ("bpf: Support readonly/readwrite buffers in verifier")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 kernel/bpf/verifier.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index cd14e70f2d07..88bb25d08bf8 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -3477,14 +3477,14 @@ static int check_mem_access(struct bpf_verifier_env 
*env, int insn_idx, u32 regn
                                regno, reg_type_str[reg->type]);
                        return -EACCES;
                }
-               err = check_buffer_access(env, reg, regno, off, size, "rdonly",
-                                         false,
+               err = check_buffer_access(env, reg, regno, off, size, false,
+                                         "rdonly",
                                          &env->prog->aux->max_rdonly_access);
                if (!err && value_regno >= 0)
                        mark_reg_unknown(env, regs, value_regno);
        } else if (reg->type == PTR_TO_RDWR_BUF) {
-               err = check_buffer_access(env, reg, regno, off, size, "rdwr",
-                                         false,
+               err = check_buffer_access(env, reg, regno, off, size, false,
+                                         "rdwr",
                                          &env->prog->aux->max_rdwr_access);
                if (!err && t == BPF_READ && value_regno >= 0)
                        mark_reg_unknown(env, regs, value_regno);
-- 
2.27.0