[PATCH net 1/3] devlink: Fix param set handling for string type
From: Moshe Shemesh <hidden>
Date: 2018-10-10 14:09:47
Also in:
lkml
Subsystem:
devlink, networking [general], the rest · Maintainers:
Jiri Pirko, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
In case devlink param type is string, it needs to copy the string value
it got from the input to devlink_param_value.
Fixes: e3b7ca18ad7b ("devlink: Add param set command")
Signed-off-by: Moshe Shemesh <redacted>
---
include/net/devlink.h | 2 +-
net/core/devlink.c | 11 ++++++++---
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/include/net/devlink.h b/include/net/devlink.h
index b9b89d6..b0e17c0 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h@@ -311,7 +311,7 @@ enum devlink_param_type { u8 vu8; u16 vu16; u32 vu32; - const char *vstr; + char vstr[DEVLINK_PARAM_MAX_STRING_VALUE]; bool vbool; };
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 8c0ed22..d808af7 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c@@ -2995,6 +2995,8 @@ static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg, struct genl_info *info, union devlink_param_value *value) { + int len; + if (param->type != DEVLINK_PARAM_TYPE_BOOL && !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) return -EINVAL;
@@ -3010,10 +3012,13 @@ static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg, value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]); break; case DEVLINK_PARAM_TYPE_STRING: - if (nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) > - DEVLINK_PARAM_MAX_STRING_VALUE) + len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]), + nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])); + if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) || + len >= DEVLINK_PARAM_MAX_STRING_VALUE) return -EINVAL; - value->vstr = nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]); + strcpy(value->vstr, + nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])); break; case DEVLINK_PARAM_TYPE_BOOL: value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
--
1.8.3.1