net/sched: act_ipt: fix refcount leak when replace fails
After commit 4e8ddd7f ("net: sched: don't release reference on action overwrite"), the error path of all actions was converted to drop refcount also when the action was being overwritten. But we forgot act_ipt_init(), in case allocation of 'tname' was not successful: # tc action add action xt -j LOG --log-prefix hello index 100 tablename: mangle hook: NF_IP_POST_ROUTING target: LOG level warning prefix "hello" index 100 # tc action show action xt total acts 1 action order 0: tablename: mangle hook: NF_IP_POST_ROUTING target LOG level warning prefix "hello" index 100 ref 1 bind 0 # tc action replace action xt -j LOG --log-prefix world index 100 tablename: mangle hook: NF_IP_POST_ROUTING target: LOG level warning prefix "world" index 100 RTNETLINK answers: Cannot allocate memory We have an error talking to the kernel # tc action show action xt total acts 1 action order 0: tablename: mangle hook: NF_IP_POST_ROUTING target LOG level warning prefix "hello" index 100 ref 2 bind 0 Ensure we call tcf_idr_release(), in case 'tname' allocation failed, also when the action is being replaced. Fixes: 4e8ddd7f ("net: sched: don't release reference on action overwrite") Signed-off-by:Davide Caratti <dcaratti@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
c3619a48
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