Detections
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CVE-2024-56768
medium
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP On x86-64 calling bpf_get_smp_processor_id() in a kernel with CONFIG_SMP disabled can trigger the following bug, as pcpu_hot is unavailable: [ 8.471774] BUG: unable to handle page fault for address: 00000000936a290c [ 8.471849] #PF: supervisor read access in kernel mode [ 8.471881] #PF: error_code(0x0000) - not-present page Fix by inlining a return 0 in the !CONFIG_SMP case.
References
https://git.kernel.org/stable/c/f4ab7d74247b0150547cf909b3f6f24ee85183df
https://git.kernel.org/stable/c/23579010cf0a12476e96a5f1acdf78a9c5843657