Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf: Mark faultable stack helpers as sleepable The faultable variants of bpf_get_stack() and bpf_get_task_stack() pass may_fault=true into the common stack collection code. Resolving user-space build IDs may then call build_id_parse_file() and block on filesystem reads. Neither helper prototype sets might_sleep. Since prototype selection uses the sleepability of the whole program, the verifier can still allow these helpers from a non-sleepable region within that program, such as an explicit RCU or preemption-disabled region. The task-stack helper can also be called from a non-sleepable timer callback of a sleepable program. Mark both faultable prototypes as sleepable. The existing helper context check then rejects these calls while continuing to allow them in genuinely sleepable contexts.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d4dd9775ec242425576af93daadb80a34083a53c before 44b8d370f2725bad215da3e67668e98ba96671bd; affected d4dd9775ec242425576af93daadb80a34083a53c before 3014e8a8bdad55075d89836ad9c10710a9a69837; affected d4dd9775ec242425576af93daadb80a34083a53c before 19e8d5a98afd071d8c1c5adeccf92b3c42eddc70; affected d4dd9775ec242425576af93daadb80a34083a53c before 9d02927fdf4e930893c92e35fed01a2704496900 |
| Linux / Linux | affected 6.12; unaffected 0 before 6.12; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.