Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: prevent buffer overflow in page_pool allocation The per‑processor buffering scheme is supported only if the number of pools (nrxqs * 2) does not exceed MVPP2_BM_MAX_POOLS (8). This is already checked in mvpp2_probe() during the initial activation of percpu_pools. However, mvpp2_change_mtu() may later call mvpp2_bm_switch_buffers(priv, true) without this check, which can lead to an out-of-bounds access in the priv->page_pool array in mvpp2_bm_init(). The array is sized to hold MVPP2_PORT_MAX_RXQ entries, and mvpp2_get_nrxqs() may return exactly that value. The per-CPU scheme then doubles it to nrxqs * 2, exceeding the array bounds. Check that the hardware version is MVPP22 or newer and that the number of pools (nrxqs * 2) does not exceed MVPP2_BM_MAX_POOLS before switching to per-CPU mode. Found by Linux Verification Center (linuxtesting.org) with SVACE.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f before 5cefdb7acfc646fbded59ae77dfe0aac4c9e4a3c; affected 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f before 4ac1d5adc4f4dbafbfd270b55cc6d8bf9849d545; affected 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f before dfd46b5584a5881b131008767950e1ab82713c8c; affected 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f before 6569fd85b0ef9a8a6f20b7eb868420b8c7c0c2a0; affected 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f before e7f30dcfa6c64033bf9137362517bd248e5be384; affected 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f before f0e7d62c1eb984dd204095118973c59604144cd8; affected 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f before 1734c3fc0066e228ce1c11e434b7c2527f0a949a; affected 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f before 14cb1e7702e5cb3c58888f6aed498381a73927d2 |
| Linux / Linux | affected 5.4; unaffected 0 before 5.4; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5cefdb7acfc646fbded59ae77dfe0aac4c9e4a3c
- https://git.kernel.org/stable/c/4ac1d5adc4f4dbafbfd270b55cc6d8bf9849d545
- https://git.kernel.org/stable/c/dfd46b5584a5881b131008767950e1ab82713c8c
- https://git.kernel.org/stable/c/6569fd85b0ef9a8a6f20b7eb868420b8c7c0c2a0
- https://git.kernel.org/stable/c/e7f30dcfa6c64033bf9137362517bd248e5be384
- https://git.kernel.org/stable/c/f0e7d62c1eb984dd204095118973c59604144cd8
- https://git.kernel.org/stable/c/1734c3fc0066e228ce1c11e434b7c2527f0a949a
- https://git.kernel.org/stable/c/14cb1e7702e5cb3c58888f6aed498381a73927d2