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RDMA/iw_cxgb4: Avoid freeing skb twice in arp failure case 

_put_ep_safe() and _put_pass_ep_safe() free the skb before it is freed by
process_work(). fix double free by freeing the skb only in process_work().

Fixes: 1dad0ebeea ("iw_cxgb4: Avoid touch after free error in ARP failure handlers")
Link: https://lore.kernel.org/r/1572006880-5800-1-git-send-email-bharat@chelsio.com
Signed-off-by: Dakshaja Uppalapati <dakshaja@chelsio.com>
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Potnuri Bharat Teja 2019-10-25 18:04:40 +05:30 committed by Jason Gunthorpe
parent 1524b12a6e
commit d4934f4569
1 changed files with 0 additions and 2 deletions
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2
drivers/infiniband/hw/cxgb4/cm.c
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@ -495,7 +495,6 @@ static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))); ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
release_ep_resources(ep); release_ep_resources(ep);
kfree_skb(skb);
return 0; return 0;
} }
@ -506,7 +505,6 @@ static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))); ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
c4iw_put_ep(&ep->parent_ep->com); c4iw_put_ep(&ep->parent_ep->com);
release_ep_resources(ep); release_ep_resources(ep);
kfree_skb(skb);
return 0; return 0;
} }