cve-2024-39506
Vulnerability from cvelistv5
Published
2024-07-12 12:20
Modified
2024-12-19 09:07
Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
liquidio: Adjust a NULL pointer handling path in lio_vf_rep_copy_packet
In lio_vf_rep_copy_packet() pg_info->page is compared to a NULL value,
but then it is unconditionally passed to skb_add_rx_frag() which looks
strange and could lead to null pointer dereference.
lio_vf_rep_copy_packet() call trace looks like:
octeon_droq_process_packets
octeon_droq_fast_process_packets
octeon_droq_dispatch_pkt
octeon_create_recv_info
...search in the dispatch_list...
->disp_fn(rdisp->rinfo, ...)
lio_vf_rep_pkt_recv(struct octeon_recv_info *recv_info, ...)
In this path there is no code which sets pg_info->page to NULL.
So this check looks unneeded and doesn't solve potential problem.
But I guess the author had reason to add a check and I have no such card
and can't do real test.
In addition, the code in the function liquidio_push_packet() in
liquidio/lio_core.c does exactly the same.
Based on this, I consider the most acceptable compromise solution to
adjust this issue by moving skb_add_rx_frag() into conditional scope.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
References
Impacted products
| Vendor | Product | Version | |||||
|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 1f233f327913f3dee0602cba9c64df1903772b55 Version: 1f233f327913f3dee0602cba9c64df1903772b55 Version: 1f233f327913f3dee0602cba9c64df1903772b55 Version: 1f233f327913f3dee0602cba9c64df1903772b55 Version: 1f233f327913f3dee0602cba9c64df1903772b55 Version: 1f233f327913f3dee0602cba9c64df1903772b55 Version: 1f233f327913f3dee0602cba9c64df1903772b55 Version: 1f233f327913f3dee0602cba9c64df1903772b55 |
||||
|
|||||||
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