漏洞信息
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Vulnerability Title
net: fec: handle page_pool_dev_alloc_pages error
Vulnerability Description
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.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux kernel 代码问题漏洞
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在代码问题漏洞，该漏洞源于fec_enet_update_cbd函数调用page_pool_dev_alloc_pages时未正确处理返回NULL的情况。当系统内存压力较大时，可能会导致系统崩溃。
CVSS Information
N/A
Vulnerability Type
N/A