Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sfc: Don't invoke xdp_do_flush() from netpoll. Yury reported a crash in the sfc driver originated from netpoll_send_udp(). The netconsole sends a message and then netpoll invokes the driver's NAPI function with a budget of zero. It is dedicated to allow driver to free TX resources, that it may have used while sending the packet. In the netpoll case the driver invokes xdp_do_flush() unconditionally, leading to crash because bpf_net_context was never assigned. Invoke xdp_do_flush() only if budget is not zero.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 401cb7dae8130fd34eb84648e02ab4c506df7d5e before 65d4fc76d75c136744e67754d20feda609e7b793; affected 401cb7dae8130fd34eb84648e02ab4c506df7d5e before 55e802468e1d38dec8e25a2fdb6078d45b647e8c |
| Linux / Linux | affected 6.11; unaffected 0 before 6.11; unaffected 6.11.4 through 6.11.*; unaffected 6.12 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/65d4fc76d75c136744e67754d20feda609e7b793
- https://git.kernel.org/stable/c/55e802468e1d38dec8e25a2fdb6078d45b647e8c
ADP enrichment
No English description supplied.
No references supplied.