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drm/amdkfd: Check bounds in allocate_event_notification_slot

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commit bb52249fbb upstream.

The valid event ids go from 0 to KFD_SIGNAL_EVENT_LIMIT

allocate_event_notification_slot has an option to specify
an event id to allocate at, used by CRIU. We weren't checking
the bounds on that value.

Check them.

v2: Lower bounds check is unecessary because of idr_alloc
already rejecting negative numbers. Upper bounds check should
be KFD_SIGNAL_EVENT_LIMIT since the signal mode mappings might
not yet exist

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: David Yat Sin <david.yatsin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 6853f1f6cb)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Francis
2026-08-03 11:15:24 +02:00
committed by Greg Kroah-Hartman
parent ec26f6cdcc
commit 85eedff5f0
1 changed files with 3 additions and 0 deletions
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drivers/gpu/drm/amd/amdkfd/kfd_events.c
+3
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@@ -106,6 +106,9 @@ static int allocate_event_notification_slot(struct kfd_process *p,
}
if (restore_id) {
if (*restore_id >= KFD_SIGNAL_EVENT_LIMIT)
return -EINVAL;
id = idr_alloc(&p->event_idr, ev, *restore_id, *restore_id + 1,
GFP_KERNEL);
} else {