diff options
| author | Wei Yongjun <weiyongjun1@huawei.com> | 2022-11-14 11:06:26 +0000 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-12-18 20:29:53 -0500 |
| commit | 08c94d80b2da481652fb633e79cbc41e9e326a91 (patch) | |
| tree | f4094790e2b1b705c22d419e080034b2bc0e1579 | |
| parent | 77a67255609606164e1042f3bf7452a568a700e4 (diff) | |
| download | usb-08c94d80b2da481652fb633e79cbc41e9e326a91.tar.gz | |
scsi: bnx2fc: Fix skb double free in bnx2fc_rcv()
skb_share_check() already drops the reference to the skb when returning
NULL. Using kfree_skb() in the error handling path leads to an skb double
free.
Fix this by removing the variable tmp_skb, and return directly when
skb_share_check() returns NULL.
Fixes: 01a4cc4d0cd6 ("bnx2fc: do not add shared skbs to the fcoe_rx_list")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20221114110626.526643-1-weiyongjun@huaweicloud.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c index 05ddbb9bb7d8aa..451a58e0fd9691 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c +++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c @@ -429,7 +429,6 @@ static int bnx2fc_rcv(struct sk_buff *skb, struct net_device *dev, struct fcoe_ctlr *ctlr; struct fcoe_rcv_info *fr; struct fcoe_percpu_s *bg; - struct sk_buff *tmp_skb; interface = container_of(ptype, struct bnx2fc_interface, fcoe_packet_type); @@ -441,11 +440,9 @@ static int bnx2fc_rcv(struct sk_buff *skb, struct net_device *dev, goto err; } - tmp_skb = skb_share_check(skb, GFP_ATOMIC); - if (!tmp_skb) - goto err; - - skb = tmp_skb; + skb = skb_share_check(skb, GFP_ATOMIC); + if (!skb) + return -1; if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { printk(KERN_ERR PFX "bnx2fc_rcv: Wrong FC type frame\n"); |