概要

In the Linux kernel, the following vulnerability has been resolved:tracing: Fix overflow in get_free_elt() tracing_map->next_elt in get_free_elt() is at risk of overflowing.Once it overflows, new elements can still be inserted into the tracing_mapeven though the maximum number of elements (`max_elts`) has been reached.Continuing to insert elements after the overflow could result in thetracing_map containing tracing_map->max_size elements, leaving no emptyentries.If any attempt is made to insert an element into a full tracing_map using`__tracing_map_insert()`, it will cause an infinite loop with preemptiondisabled, leading to a CPU hang problem.Fix this by preventing any further increments to tracing_map->next_elt once it reaches tracing_map->max_elt .

CVSS v3 指标

安全公告

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