Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: cortina: Carry over frag counter The gmac_rx() NAPI poll function assembles packets in an SKB from a ring buffer. If the ring buffer gets completely emptied during a poll cycle, we exit gmac_rx(), but the packet is not yet completely assembled in the SKB, yet the fragment counter frag_nr is reset to zero on the next invocation. Solve this by making the RX fragment counter a part of the port struct, and carry it over between invocations. Reset the fragment counter only right after calling napi_gro_frags(), on error (after calling napi_free_frags()) or if stopping the port. Reset it in some place where not strictly necessary just to emphasize what is going on. This was found by Sashiko during normal patch review.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 before df31e3b64455293df1ea89c7da7d5c9bfbcdd253; affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 before 7af1fabdee744b7995fe01b30b77dfc397657cb5; affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 before 75105fcf73f1ce7d9f769aaefec6e6d6645d5ac0; affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 before 78cf08b3be47c28f07008a76c932bad7cdffa9d8; affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 before 7123cf481e21b54eb6adc4cb0d8dc2876aeaee41; affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 before c373b34877afea61c89e0dd2e38948c624249b9b; affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 before 46806096f35b8d3dfa2f321ddd77f597edcdb85f; affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 before ebd8ec2b309e3a447851b456ccaf8fb39f3661e7 |
| Linux / Linux | affected 4.16; unaffected 0 before 4.16; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.142 through 6.6.*; unaffected 6.12.92 through 6.12.*; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/df31e3b64455293df1ea89c7da7d5c9bfbcdd253
- https://git.kernel.org/stable/c/7af1fabdee744b7995fe01b30b77dfc397657cb5
- https://git.kernel.org/stable/c/75105fcf73f1ce7d9f769aaefec6e6d6645d5ac0
- https://git.kernel.org/stable/c/78cf08b3be47c28f07008a76c932bad7cdffa9d8
- https://git.kernel.org/stable/c/7123cf481e21b54eb6adc4cb0d8dc2876aeaee41
- https://git.kernel.org/stable/c/c373b34877afea61c89e0dd2e38948c624249b9b
- https://git.kernel.org/stable/c/46806096f35b8d3dfa2f321ddd77f597edcdb85f
- https://git.kernel.org/stable/c/ebd8ec2b309e3a447851b456ccaf8fb39f3661e7