WARN: event xe_bo_move has unsafe dereference of argument 4

[Adam Borowski]

Hi!
Got this warn:

[   15.500525] [ T1043] WARNING: CPU: 50 PID: 1043 at kernel/trace/trace_events.c:577 trace_event_raw_init+0xd9/0x450
[   15.510768] [ T1043] Modules linked in: fjes(+) xe(+) cec drm_gpuvm drm_ttm_helper ttm drm_exec drm_suballoc_helper drm_buddy jc42 gpu_sched drm_display_helper sha256_ssse3 drm_kms_helper ee1004
[   15.527938] [ T1043] CPU: 50 UID: 0 PID: 1043 Comm: (udev-worker) Not tainted 6.13.0-rc3-00228-g783d0c4ebb49 #1
[   15.537913] [ T1043] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X399 Taichi, BIOS P4.01 05/02/2023
[   15.548322] [ T1043] RIP: 0010:trace_event_raw_init+0xd9/0x450
[   15.554055] [ T1043] Code: a3 cf 0f 83 4a 03 00 00 e8 e4 e0 ff ff 84 c0 74 10 8b 0c 24 48 c7 c0 fe ff ff ff 48 d3 c0 49 21 c5 4d 85 ed 0f 84 53 ff ff ff <0f> 0b ba 01 00 00 00 41 f6 c5 01 0f 85 4f 1a d5 ff 66 0f 1f 44 00
[   15.573470] [ T1043] RSP: 0018:ffffa6f818abfbe0 EFLAGS: 00010206
[   15.579379] [ T1043] RAX: ffffffffffffffdf RBX: ffffffffc0c088b2 RCX: 0000000000000005
[   15.587190] [ T1043] RDX: 0000000000000002 RSI: 0000000000000001 RDI: ffffffffc0c088a7
[   15.595000] [ T1043] RBP: ffffffffc0c087c0 R08: 00000000000000de R09: 00000000000000de
[   15.602811] [ T1043] R10: 0000000000000000 R11: ffffffffc0c088b2 R12: ffffffffc0c098e0
[   15.610620] [ T1043] R13: 0000000000000018 R14: 0000000000000000 R15: 0000000000000039
[   15.618431] [ T1043] FS:  00007f1ce6fd88c0(0000) GS:ffff911a7ea80000(0000) knlGS:0000000000000000
[   15.627193] [ T1043] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   15.633621] [ T1043] CR2: 00007f1ce61ff25c CR3: 000000209a1e7000 CR4: 00000000003506f0
[   15.641433] [ T1043] Call Trace:
[   15.644566] [ T1043]  <TASK>
[   15.647355] [ T1043]  ? trace_event_raw_init+0xd9/0x450
[   15.652484] [ T1043]  ? __warn.cold+0x93/0xf3
[   15.656749] [ T1043]  ? trace_event_raw_init+0xd9/0x450
[   15.661877] [ T1043]  ? report_bug+0xe2/0x170
[   15.666141] [ T1043]  ? handle_bug+0x4f/0x90
[   15.670316] [ T1043]  ? exc_invalid_op+0x13/0x60
[   15.674836] [ T1043]  ? asm_exc_invalid_op+0x16/0x20
[   15.679706] [ T1043]  ? trace_event_raw_init+0xd9/0x450
[   15.684833] [ T1043]  event_init+0x28/0x60
[   15.688838] [ T1043]  trace_module_notify+0x186/0x230
[   15.693794] [ T1043]  notifier_call_chain+0x54/0xc0
[   15.698576] [ T1043]  blocking_notifier_call_chain_robust+0x53/0x90
[   15.704743] [ T1043]  load_module+0x1f21/0x2240
[   15.709182] [ T1043]  ? init_module_from_file+0x75/0xa0
[   15.714310] [ T1043]  init_module_from_file+0x75/0xa0
[   15.719267] [ T1043]  idempotent_init_module+0xee/0x2c0
[   15.724395] [ T1043]  __x64_sys_finit_module+0x61/0xc0
[   15.729438] [ T1043]  do_syscall_64+0x47/0x130
[   15.733786] [ T1043]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   15.739522] [ T1043] RIP: 0033:0x7f1ce718d5b9
[   15.743782] [ T1043] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 37 88 0d 00 f7 d8 64 89 01 48
[   15.763196] [ T1043] RSP: 002b:00007ffc5ac119b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[   15.771441] [ T1043] RAX: ffffffffffffffda RBX: 000055ae066edd80 RCX: 00007f1ce718d5b9
[   15.779251] [ T1043] RDX: 0000000000000000 RSI: 00007f1ce6fd0541 RDI: 000000000000001b
[   15.787061] [ T1043] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
[   15.794871] [ T1043] R10: 00007f1ce7266ac0 R11: 0000000000000246 R12: 00007f1ce6fd0541
[   15.802681] [ T1043] R13: 0000000000020000 R14: 000055ae066ed440 R15: 0000000000000000
[   15.810493] [ T1043]  </TASK>
[   15.813369] [ T1043] ---[ end trace 0000000000000000 ]---
[   15.818670] [ T1043] event xe_bo_move has unsafe dereference of argument 4
[   15.825448] [ T1043] print_fmt: "move_lacks_source:%s, migrate object %p [size %zu] from %s to %s device_id:%s", REC->move_lacks_source ? "yes" : "no", REC->bo, REC->size, xe_mem_type_to_name[REC->old_placement], xe_mem_type_to_name[REC->new_placement], __get_str(device_id)

I see recent fixes to dereference checks in the event machinery from Dec 16
thus you probably already noticed this and have a fix on the way -- but
reporting just in case.


Meow!
-- 
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