diff options
| author | Dan Carpenter <dan.carpenter@linaro.org> | 2025-09-23 14:19:11 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2025-09-25 11:04:34 +0200 |
| commit | d9c70e93ec5988ab07ad2a92d9f9d12867f02c56 (patch) | |
| tree | f13a150e7a8c504398dc442f85f38bbaf2e25ce2 | |
| parent | 764a47a639c73e8d941cbbb10696a0eb98d10d7b (diff) | |
octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()
This code calls kfree_rcu(new_node, rcu) and then dereferences "new_node"
and then dereferences it on the next line. Two lines later, we take
a mutex so I don't think this is an RCU safe region. Re-order it to do
the dereferences before queuing up the free.
Fixes: 68fbff68dbea ("octeontx2-pf: Add police action for TC flower")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/aNKCL1jKwK8GRJHh@stanley.mountain
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
| -rw-r--r-- | drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c index 5f80b23c5335..26a08d2cfbb1 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c @@ -1326,7 +1326,6 @@ static int otx2_tc_add_flow(struct otx2_nic *nic, free_leaf: otx2_tc_del_from_flow_list(flow_cfg, new_node); - kfree_rcu(new_node, rcu); if (new_node->is_act_police) { mutex_lock(&nic->mbox.lock); @@ -1346,6 +1345,7 @@ free_leaf: mutex_unlock(&nic->mbox.lock); } + kfree_rcu(new_node, rcu); return rc; } |