diff options
| author | Paul Moses <p@1g4.org> | 2026-03-09 17:35:10 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-19 16:15:25 +0100 |
| commit | 83f7b54242d0abbfce35a55c01322f50962ed3ee (patch) | |
| tree | 4bc480dad8a31572fdc7070c77a9d49e75b25ecd | |
| parent | 0212fe3d5a3a35bed56db16dccaa98b72e1ab2b2 (diff) | |
net-shapers: don't free reply skb after genlmsg_reply()
commit 57885276cc16a2e2b76282c808a4e84cbecb3aae upstream.
genlmsg_reply() hands the reply skb to netlink, and
netlink_unicast() consumes it on all return paths, whether the
skb is queued successfully or freed on an error path.
net_shaper_nl_get_doit() and net_shaper_nl_cap_get_doit()
currently jump to free_msg after genlmsg_reply() fails and call
nlmsg_free(msg), which can hit the same skb twice.
Return the genlmsg_reply() error directly and keep free_msg
only for pre-reply failures.
Fixes: 4b623f9f0f59 ("net-shapers: implement NL get operation")
Fixes: 553ea9f1efd6 ("net: shaper: implement introspection support")
Cc: stable@vger.kernel.org
Signed-off-by: Paul Moses <p@1g4.org>
Link: https://patch.msgid.link/20260309173450.538026-2-p@1g4.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/shaper/shaper.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/net/shaper/shaper.c b/net/shaper/shaper.c index 7101a48bce54..318a0567a698 100644 --- a/net/shaper/shaper.c +++ b/net/shaper/shaper.c @@ -759,11 +759,7 @@ int net_shaper_nl_get_doit(struct sk_buff *skb, struct genl_info *info) if (ret) goto free_msg; - ret = genlmsg_reply(msg, info); - if (ret) - goto free_msg; - - return 0; + return genlmsg_reply(msg, info); free_msg: nlmsg_free(msg); @@ -1314,10 +1310,7 @@ int net_shaper_nl_cap_get_doit(struct sk_buff *skb, struct genl_info *info) if (ret) goto free_msg; - ret = genlmsg_reply(msg, info); - if (ret) - goto free_msg; - return 0; + return genlmsg_reply(msg, info); free_msg: nlmsg_free(msg); |