Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: fec: handle page_pool_dev_alloc_pages error The fec_enet_update_cbd function calls page_pool_dev_alloc_pages but did not handle the case when it returned NULL. There was a WARN_ON(!new_page) but it would still proceed to use the NULL pointer and then crash. This case does seem somewhat rare but when the system is under memory pressure it can happen. One case where I can duplicate this with some frequency is when writing over a smbd share to a SATA HDD attached to an imx6q. Setting /proc/sys/vm/min_free_kbytes to higher values also seems to solve the problem for my test case. But it still seems wrong that the fec driver ignores the memory allocation error and can crash. This commit handles the allocation error by dropping the current packet.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 95698ff6177b5f1f13f251da60e7348413046ae4 before eacdcc14f3c8d4c1447565521e792ddb3a67e08d; affected 95698ff6177b5f1f13f251da60e7348413046ae4 before 8a0097db0544b658c159ac787319737712063a23; affected 95698ff6177b5f1f13f251da60e7348413046ae4 before 1425cb829556398f594658512d49292f988a2ab0; affected 95698ff6177b5f1f13f251da60e7348413046ae4 before 001ba0902046cb6c352494df610718c0763e77a5 |
| Linux / Linux | affected 6.1; unaffected 0 before 6.1; unaffected 6.1.167 through 6.1.*; unaffected 6.6.74 through 6.6.*; unaffected 6.12.11 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/eacdcc14f3c8d4c1447565521e792ddb3a67e08d
- https://git.kernel.org/stable/c/8a0097db0544b658c159ac787319737712063a23
- https://git.kernel.org/stable/c/1425cb829556398f594658512d49292f988a2ab0
- https://git.kernel.org/stable/c/001ba0902046cb6c352494df610718c0763e77a5
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.