https://bugs.dpdk.org/show_bug.cgi?id=675
Bug ID: 675
Summary: net/ice: possible integer overflow when computing
max_pkt_len
Product: DPDK
Version: 20.11
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: ethdev
Assignee: dev@dpdk.org
Reporter: tudor.cor...@gmail.com
Target Milestone: ---
Created attachment 155
--> https://bugs.dpdk.org/attachment.cgi?id=155&action=edit
Patch with possible fix
Greetings,
While working with the Intel ice driver (E810 NIC), I have stumbled into, what
I think to be a bug, which is causing all Jumbo Frames to get dropped.
I think that the len variable, used in the computation of max_pkt_len could
overflow, if used to store the result of the following computation:
ICE_SUPPORT_CHAIN_NUM * rxq->rx_buf_len
Since, we could define the mbuf size to have a large value (i.e 13312),
and ICE_SUPPORT_CHAIN_NUM is defined as 5, the computation mentioned above,
could potentially result in a value which might be bigger than MAX_USHORT.
The result will be that Jumbo Frames will not work properly
Could you please review the following pull request (I have also added the patch
as an attachment) ?
[1] https://github.com/DPDK/dpdk/pull/29
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