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[  208.771473] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  208.771750] WARNING: CPU: 0 PID: 2599 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  208.774950] Modules linked in:
[  208.775637] CPU: 0 UID: 0 PID: 2599 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-next-20250530 #1 PREEMPT(voluntary) 
[  208.776725] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  208.777202] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  208.778583] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  208.779337] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 7b 41 87 00 48 c7 c1 a0 cd bd 89 4c 89 fa 48 c7 c7 00 ce bd 89 48 89 c6 e8 d2 e1 7a fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  208.780831] RSP: 0000:ffff888108f2fb68 EFLAGS: 00010282
[  208.781729] RAX: 0000000000000000 RBX: ffff888108f2fc40 RCX: 1ffffffff1524cec
[  208.782440] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  208.783425] RBP: ffff888108f2fb90 R08: 0000000000000000 R09: fffffbfff1524cec
[  208.784221] R10: 0000000000000003 R11: 00000000000386e0 R12: ffff888108f2fc18
[  208.785069] R13: ffff888108b0e000 R14: ffff8881034cf000 R15: ffff888106541200
[  208.786138] FS:  0000000000000000(0000) GS:ffff8881cf45b000(0000) knlGS:0000000000000000
[  208.787465] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  208.788076] CR2: 00007ffff7ffe000 CR3: 00000001246bc000 CR4: 00000000000006f0
[  208.788918] DR0: ffffffff8bc69400 DR1: ffffffff8bc69401 DR2: ffffffff8bc69402
[  208.789646] DR3: ffffffff8bc69403 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  208.790180] Call Trace:
[  208.790659]  <TASK>
[  208.790984]  drm_test_framebuffer_free+0x1ab/0x610
[  208.791632]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  208.792103]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  208.792800]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  208.793289]  ? __drmm_add_action_or_reset+0x22/0x50
[  208.794302]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  208.794811]  kunit_try_run_case+0x1a5/0x480
[  208.795481]  ? __pfx_kunit_try_run_case+0x10/0x10
[  208.795911]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  208.796388]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  208.797209]  ? __kthread_parkme+0x82/0x180
[  208.798035]  ? preempt_count_sub+0x50/0x80
[  208.798637]  ? __pfx_kunit_try_run_case+0x10/0x10
[  208.799145]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  208.799888]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  208.800649]  kthread+0x337/0x6f0
[  208.801019]  ? trace_preempt_on+0x20/0xc0
[  208.801947]  ? __pfx_kthread+0x10/0x10
[  208.802390]  ? _raw_spin_unlock_irq+0x47/0x80
[  208.803036]  ? calculate_sigpending+0x7b/0xa0
[  208.803524]  ? __pfx_kthread+0x10/0x10
[  208.804150]  ret_from_fork+0x116/0x1d0
[  208.804699]  ? __pfx_kthread+0x10/0x10
[  208.805180]  ret_from_fork_asm+0x1a/0x30
[  208.806145]  </TASK>
[  208.806662] ---[ end trace 0000000000000000 ]---