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CVE-2024-43890

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 ris…

Impact

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_map even though the maximum number of elements (`max_elts`) has been reached. Continuing to insert elements after the overflow could result in the tracing_map containing "tracing_map->max_size" elements, leaving no empty entries. 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 preemption disabled, 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".

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.7 before 4.19.320
from 4.20 before 5.4.282
from 5.5 before 5.10.224
from 5.11 before 5.15.165
from 5.16 before 6.1.105
from 6.2 before 6.6.46

Weakness classification

CWE-190

References