概要

In the Linux kernel, the following vulnerability has been resolved:net: qlogic: qlcnic: Fix a NULL pointer dereference in qlcnic_83xx_add_rings()In qlcnic_83xx_add_rings(), the indirect function ofahw->hw_ops->alloc_mbx_args will be called to allocate memory forcmd.req.arg, and there is a dereference of it in qlcnic_83xx_add_rings(),which could lead to a NULL pointer dereference on failure of theindirect function like qlcnic_83xx_alloc_mbx_args().Fix this bug by adding a check of alloc_mbx_args(), this patchimitates the logic of mbx_cmd() s failure handling.This bug was found by a static analyzer. The analysis employsdifferential checking to identify inconsistent security operations(e.g., checks or kfrees) between two code paths and confirms that theinconsistent operations are not recovered in the current function orthe callers, so they constitute bugs.Note that, as a bug found by static analysis, it can be a falsepositive or hard to trigger. Multiple researchers have cross-reviewedthe bug.Builds with CONFIG_QLCNIC=m show no new warnings, and ourstatic analyzer no longer warns about this code.

CVSS v3 指标

安全公告

影响产品