diff options
| author |   David S. Miller <davem@davemloft.net> | 2019-03-31 16:45:57 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-03-31 16:45:57 -0700 |
| commit | 7ff0b608984b9589b5374aaa26ffd1621d8601f5 (patch) | |
| tree | 62a3530ea82a7391c5731c04bcb9c76dc15f386e | |
| parent | Merge branch 'net-stmmac-fix-handling-of-oversized-frames' (diff) | |
| parent | tipc: handle the err returned from cmd header function (diff) | |
| download | linux-dev-7ff0b608984b9589b5374aaa26ffd1621d8601f5.tar.xz linux-dev-7ff0b608984b9589b5374aaa26ffd1621d8601f5.zip | |
Merge branch 'tipc-a-batch-of-uninit-value-fixes-for-netlink_compat'
Xin Long says:
====================
tipc: a batch of uninit-value fixes for netlink_compat
These issues were all reported by syzbot, and exist since very beginning.
See the details on each patch.
====================
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/tipc/netlink_compat.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c index 4ad3586da8f0..340a6e7c43a7 100644 --- a/net/tipc/netlink_compat.c +++ b/net/tipc/netlink_compat.c @@ -267,8 +267,14 @@ static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, if (msg->rep_type) tipc_tlv_init(msg->rep, msg->rep_type); - if (cmd->header) - (*cmd->header)(msg); + if (cmd->header) { + err = (*cmd->header)(msg); + if (err) { + kfree_skb(msg->rep); + msg->rep = NULL; + return err; + } + } arg = nlmsg_new(0, GFP_KERNEL); if (!arg) { @@ -397,7 +403,12 @@ static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd, if (!bearer) return -EMSGSIZE; - len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_BEARER_NAME); + len = TLV_GET_DATA_LEN(msg->req); + len -= offsetof(struct tipc_bearer_config, name); + if (len <= 0) + return -EINVAL; + + len = min_t(int, len, TIPC_MAX_BEARER_NAME); if (!string_is_valid(b->name, len)) return -EINVAL; @@ -766,7 +777,12 @@ static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, lc = (struct tipc_link_config *)TLV_DATA(msg->req); - len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_LINK_NAME); + len = TLV_GET_DATA_LEN(msg->req); + len -= offsetof(struct tipc_link_config, name); + if (len <= 0) + return -EINVAL; + + len = min_t(int, len, TIPC_MAX_LINK_NAME); if (!string_is_valid(lc->name, len)) return -EINVAL; |