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[  150.511223] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  150.511368] WARNING: CPU: 0 PID: 2599 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  150.512479] Modules linked in:
[  150.513059] CPU: 0 UID: 0 PID: 2599 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-next-20250529 #1 PREEMPT(voluntary) 
[  150.514487] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  150.516245] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  150.517419] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  150.517636] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 7b 41 87 00 48 c7 c1 60 cd fd 88 4c 89 fa 48 c7 c7 c0 cd fd 88 48 89 c6 e8 d2 e8 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
[  150.519119] RSP: 0000:ffff888103127b68 EFLAGS: 00010282
[  150.519667] RAX: 0000000000000000 RBX: ffff888103127c40 RCX: 1ffffffff13a4cec
[  150.520414] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  150.520659] RBP: ffff888103127b90 R08: 0000000000000000 R09: fffffbfff13a4cec
[  150.521315] R10: 0000000000000003 R11: 0000000000038368 R12: ffff888103127c18
[  150.522047] R13: ffff888102cc4800 R14: ffff888102de7000 R15: ffff88810b51d800
[  150.522665] FS:  0000000000000000(0000) GS:ffff8881c965b000(0000) knlGS:0000000000000000
[  150.523419] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  150.523925] CR2: 00007ffff7ffd000 CR3: 000000015b8bc000 CR4: 00000000000006f0
[  150.524162] DR0: ffffffff8b069400 DR1: ffffffff8b069401 DR2: ffffffff8b069402
[  150.524379] DR3: ffffffff8b069403 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  150.524606] Call Trace:
[  150.524828]  <TASK>
[  150.525019]  drm_test_framebuffer_free+0x1ab/0x610
[  150.525247]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  150.525502]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  150.525882]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  150.526201]  ? __drmm_add_action_or_reset+0x22/0x50
[  150.526490]  ? __schedule+0x10cc/0x2b60
[  150.526663]  ? __pfx_read_tsc+0x10/0x10
[  150.527118]  ? ktime_get_ts64+0x86/0x230
[  150.527369]  kunit_try_run_case+0x1a5/0x480
[  150.527539]  ? __pfx_kunit_try_run_case+0x10/0x10
[  150.527850]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  150.528101]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  150.528473]  ? __kthread_parkme+0x82/0x180
[  150.528816]  ? preempt_count_sub+0x50/0x80
[  150.529119]  ? __pfx_kunit_try_run_case+0x10/0x10
[  150.529382]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  150.529568]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  150.530033]  kthread+0x337/0x6f0
[  150.530228]  ? trace_preempt_on+0x20/0xc0
[  150.530430]  ? __pfx_kthread+0x10/0x10
[  150.530671]  ? _raw_spin_unlock_irq+0x47/0x80
[  150.531091]  ? calculate_sigpending+0x7b/0xa0
[  150.531399]  ? __pfx_kthread+0x10/0x10
[  150.531687]  ret_from_fork+0x116/0x1d0
[  150.531993]  ? __pfx_kthread+0x10/0x10
[  150.532182]  ret_from_fork_asm+0x1a/0x30
[  150.532341]  </TASK>
[  150.532470] ---[ end trace 0000000000000000 ]---