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net: microchip: sparx5: Fix error handling in vcap_show_admin()

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If vcap_dup_rule() fails that leads to an error pointer dereference
side the call to vcap_free_rule().  Also it only returns an error if the
very last call to vcap_read_rule() fails and it returns success for
other errors.

I've changed it to just stop printing after the first error and return
an error code.

Fixes: 3a7921560d ("net: microchip: sparx5: Add VCAP rule debugFS support for the VCAP API")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Steen Hegelund <Steen.Hegelund@microchip.com>
Link: https://lore.kernel.org/r/Y4XUUx9kzurBN+BV@kili
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Dan Carpenter 2022-11-29 12:43:47 +03:00 committed by Paolo Abeni
parent e5214f363d
commit 682f560b8a
1 changed files with 11 additions and 4 deletions
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15
drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c
View file

@ -639,17 +639,24 @@ static int vcap_show_admin(struct vcap_control *vctrl,
mutex_lock(&admin->lock);
list_for_each_entry(elem, &admin->rules, list) {
ri = vcap_dup_rule(elem);
if (IS_ERR(ri))
goto free_rule;
if (IS_ERR(ri)) {
ret = PTR_ERR(ri);
goto err_unlock;
}
/* Read data from VCAP */
ret = vcap_read_rule(ri);
if (ret)
goto free_rule;
goto err_free_rule;
out->prf(out->dst, "\n");
vcap_show_admin_rule(vctrl, admin, out, ri);
free_rule:
vcap_free_rule((struct vcap_rule *)ri);
}
mutex_unlock(&admin->lock);
return 0;
err_free_rule:
vcap_free_rule((struct vcap_rule *)ri);
err_unlock:
mutex_unlock(&admin->lock);
return ret;
}