diff options
| author | Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2021-12-29 11:21:18 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-12-29 17:53:24 -0800 |
| commit | 92a34ab169f9eefe29cd420ce96b0a0a2a1da853 (patch) | |
| tree | e29ba093f8eecd7ecaac4103aba985787ec58e01 | |
| parent | 168fed986b3a7ec7b98cab1fe84e2f282b9e6a8f (diff) | |
net/ncsi: check for error return from call to nla_put_u32
As we can see from the comment of the nla_put() that it could return
-EMSGSIZE if the tailroom of the skb is insufficient.
Therefore, it should be better to check the return value of the
nla_put_u32 and return the error code if error accurs.
Also, there are many other functions have the same problem, and if this
patch is correct, I will commit a new version to fix all.
Fixes: 955dc68cb9b2 ("net/ncsi: Add generic netlink family")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20211229032118.1706294-1-jiasheng@iscas.ac.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | net/ncsi/ncsi-netlink.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ncsi/ncsi-netlink.c b/net/ncsi/ncsi-netlink.c index bb5f1650f11c..c189b4c8a182 100644 --- a/net/ncsi/ncsi-netlink.c +++ b/net/ncsi/ncsi-netlink.c @@ -112,7 +112,11 @@ static int ncsi_write_package_info(struct sk_buff *skb, pnest = nla_nest_start_noflag(skb, NCSI_PKG_ATTR); if (!pnest) return -ENOMEM; - nla_put_u32(skb, NCSI_PKG_ATTR_ID, np->id); + rc = nla_put_u32(skb, NCSI_PKG_ATTR_ID, np->id); + if (rc) { + nla_nest_cancel(skb, pnest); + return rc; + } if ((0x1 << np->id) == ndp->package_whitelist) nla_put_flag(skb, NCSI_PKG_ATTR_FORCED); cnest = nla_nest_start_noflag(skb, NCSI_PKG_ATTR_CHANNEL_LIST); |