iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

qede: confirm skb is allocated before using

Browse Source 
[ Upstream commit 4e910dbe36508654a896d5735b318c0b88172570 ]

qede_build_skb() assumes build_skb() always works and goes straight
to skb_reserve(). However, build_skb() can fail under memory pressure.
This results in a kernel panic because the skb to reserve is NULL.

Add a check in case build_skb() failed to allocate and return NULL.

The NULL return is handled correctly in callers to qede_build_skb().

Fixes: 8a8633978b842 ("qede: Add build_skb() support.")
Signed-off-by: Jamie Bainbridge <jamie.bainbridge@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jamie Bainbridge 2022-04-06 21:19:19 +10:00 committed by Greg Kroah-Hartman
parent b7893388bb
commit 8928239e5e
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/qlogic/qede/qede_fp.c
View File

@ -752,6 +752,9 @@ qede_build_skb(struct qede_rx_queue *rxq,
buf = page_address(bd->data) + bd->page_offset;
skb = build_skb(buf, rxq->rx_buf_seg_size);
if (unlikely(!skb))
return NULL;
skb_reserve(skb, pad);
skb_put(skb, len);