Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: ioam6: fix OOB and missing lock When trace->type.bit6 is set: if (trace->type.bit6) { ... queue = skb_get_tx_queue(dev, skb); qdisc = rcu_dereference(queue->qdisc); This code can lead to an out-of-bounds access of the dev->_tx[] array when is_input is true. In such a case, the packet is on the RX path and skb->queue_mapping contains the RX queue index of the ingress device. If the ingress device has more RX queues than the egress device (dev) has TX queues, skb_get_queue_mapping(skb) will exceed dev->num_tx_queues. Add a check to avoid this situation since skb_get_tx_queue() does not clamp the index. This issue has also revealed that per queue visibility cannot be accurate and will be replaced later as a new feature. While at it, add missing lock around qdisc_qstats_qlen_backlog(). The function __ioam6_fill_trace_data() is called from both softirq and process contexts, hence the use of spin_lock_bh() here.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b63c5478e9cb1d1504eb02d9dac827ad24612b32 before a05a85779c2574b6534abb8cdc6d65fbc2e91208; affected b63c5478e9cb1d1504eb02d9dac827ad24612b32 before f1af9d19503b73011dae5051c354fd39b03e240d; affected b63c5478e9cb1d1504eb02d9dac827ad24612b32 before 6d1d9ed9b409e0662241e3d245d574a18f643494; affected b63c5478e9cb1d1504eb02d9dac827ad24612b32 before 95a1334748c95dd15546056280ade0c4b8dd7b78; affected b63c5478e9cb1d1504eb02d9dac827ad24612b32 before b30b1675aa2bcf0491fd3830b051df4e08a7c8ca |
| Linux / Linux | affected 5.17; unaffected 0 before 5.17; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.24 through 6.18.*; unaffected 6.19.14 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a05a85779c2574b6534abb8cdc6d65fbc2e91208
- https://git.kernel.org/stable/c/f1af9d19503b73011dae5051c354fd39b03e240d
- https://git.kernel.org/stable/c/6d1d9ed9b409e0662241e3d245d574a18f643494
- https://git.kernel.org/stable/c/95a1334748c95dd15546056280ade0c4b8dd7b78
- https://git.kernel.org/stable/c/b30b1675aa2bcf0491fd3830b051df4e08a7c8ca
ADP enrichment
No English description supplied.
No references supplied.