Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix OOB memory exposure in get_wave_state() The get_wave_state() function for v9 trusts cp_hqd_cntl_stack_size and cp_hqd_cntl_stack_offset values read directly from the MQD, which are written by GPU microcode and fully attacker-controlled on the CRIU-restore path (via AMDKFD_IOC_RESTORE_PROCESS with H3). this leads to an unbounded copy_to_user() that can leak adjacent GTT/kernel memory. If offset > size, integer underflow produces a ~4 GiB read length, if size is set to 1 MiB against a 4 KiB allocation, we leak 1 MiB of adjacent kernel memory (other queues' MQDs, ring buffers, KASLR pointers). Fix by clamping both cp_hqd_cntl_stack_size to the actual allocated buffer size (q->ctl_stack_size) and cp_hqd_cntl_stack_offset to the clamped size before performing arithmetic and copy_to_user(). This ensures we never read beyond the allocated kernel BO regardless of attacker-supplied MQD field values.
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
42c6c48214b726c30918e8dc80e2168607d13ae4 to < e2bef0f168be46692a6b900916ff5da3771480edaffected42c6c48214b726c30918e8dc80e2168607d13ae4 to < d9183d974ddd5f09d029beaf359275ac20d4d5feaffected42c6c48214b726c30918e8dc80e2168607d13ae4 to < ec646686613d8ab05b282d1463a7baa49fd6b83baffected42c6c48214b726c30918e8dc80e2168607d13ae4 to < 7ef144458f48d5589e36f1b3d83e83db2e5c5ba5affected
Linux Linux
Default version status: affected
5.18affected0 to < 5.18unaffected6.6.158 to ≤ 6.6.*unaffected6.12.111 to ≤ 6.12.*unaffected6.18.53 to ≤ 6.18.*unaffected7.2 to ≤ *unaffected