Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf: Require a BPF cpumask for bpf_cpumask_populate() bpf_cpumask_populate() writes to its destination with bitmap_copy(), but the destination is typed as struct cpumask *. That allows the verifier to accept borrowed cpumask pointers returned by read-only kfuncs, such as scx_bpf_get_online_cpumask(), as a writable destination. Make the destination a struct bpf_cpumask * so populate follows the same ownership rule as the other mutating cpumask kfuncs. Query kfuncs continue to accept const struct cpumask * inputs.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 950ad93df2fce70445e655ed2e74f5c1a8653ab2 before 0cfc9348a045da64955af2dd6902e66dfc7d6469; affected 950ad93df2fce70445e655ed2e74f5c1a8653ab2 before b7e2a5c6519adc73be55c3de2cb545e095a0fbc5; affected 950ad93df2fce70445e655ed2e74f5c1a8653ab2 before 8740156ad33be5071b588b594c55f279457f667c |
| Linux / Linux | affected 6.15; unaffected 0 before 6.15; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.