Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d4dd9775ec242425576af93daadb80a34083a53c to < 44b8d370f2725bad215da3e67668e98ba96671bdaffectedd4dd9775ec242425576af93daadb80a34083a53c to < 3014e8a8bdad55075d89836ad9c10710a9a69837affectedd4dd9775ec242425576af93daadb80a34083a53c to < 19e8d5a98afd071d8c1c5adeccf92b3c42eddc70affectedd4dd9775ec242425576af93daadb80a34083a53c to < 9d02927fdf4e930893c92e35fed01a2704496900affected
Linux Linux
Default version status: affected
6.12affected0 to < 6.12unaffected6.12.111 to ≤ 6.12.*unaffected6.18.53 to ≤ 6.18.*unaffected7.2.7 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected