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[  335.391337] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  335.392822] WARNING: CPU: 1 PID: 2108 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x136/0x1b0
[  335.394761] Modules linked in:
[  335.395269] CPU: 1 UID: 0 PID: 2108 Comm: kunit_try_catch Tainted: G    B D          N 6.13.0-rc1-next-20241206 #1
[  335.396201] Tainted: [B]=BAD_PAGE, [D]=DIE, [N]=TEST
[  335.397012] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  335.397956] RIP: 0010:drm_framebuffer_free+0x136/0x1b0
[  335.398730] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 a4 54 80 00 48 c7 c1 a0 e3 fb ab 4c 89 fa 48 c7 c7 00 e4 fb ab 48 89 c6 e8 ab de 84 fe 90 <0f> 0b 90 90 e9 25 ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  335.400957] RSP: 0000:ffff888108f67bd8 EFLAGS: 00010282
[  335.401220] RAX: 0000000000000000 RBX: ffff888108f67cb0 RCX: 1ffffffff59a4244
[  335.401534] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  335.402711] RBP: ffff888108f67c00 R08: 0000000000000000 R09: fffffbfff59a4244
[  335.403497] R10: 0000000000000003 R11: 0000000000027b58 R12: ffff888108f67c88
[  335.404106] R13: ffff88810516b800 R14: ffff888104b8a000 R15: ffff888101e9f880
[  335.405219] FS:  0000000000000000(0000) GS:ffff88815b100000(0000) knlGS:0000000000000000
[  335.406334] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  335.407079] CR2: 00007ffff7ffd000 CR3: 00000000708b8000 CR4: 00000000000006f0
[  335.407808] DR0: ffffffffadffc164 DR1: ffffffffadffc169 DR2: ffffffffadffc16a
[  335.408476] DR3: ffffffffadffc16b DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  335.409189] Call Trace:
[  335.409430]  <TASK>
[  335.410060]  ? show_regs+0x68/0x80
[  335.410490]  ? __warn+0xd5/0x260
[  335.411303]  ? drm_framebuffer_free+0x136/0x1b0
[  335.412092]  ? report_bug+0x278/0x2e0
[  335.412407]  ? drm_framebuffer_free+0x137/0x1b0
[  335.413041]  ? handle_bug+0x5c/0xb0
[  335.413491]  ? exc_invalid_op+0x1c/0x50
[  335.414062]  ? asm_exc_invalid_op+0x1f/0x30
[  335.414960]  ? drm_framebuffer_free+0x136/0x1b0
[  335.415320]  ? drm_framebuffer_free+0x135/0x1b0
[  335.416086]  drm_test_framebuffer_free+0x1ac/0x610
[  335.416842]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  335.417342]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  335.418398]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  335.419278]  ? __drmm_add_action_or_reset+0x22/0x50
[  335.420202]  ? __schedule+0xc70/0x27e0
[  335.420846]  ? __pfx_read_tsc+0x10/0x10
[  335.421191]  ? ktime_get_ts64+0x86/0x230
[  335.421965]  kunit_try_run_case+0x1b3/0x490
[  335.422801]  ? __pfx_kunit_try_run_case+0x10/0x10
[  335.423563]  ? _raw_spin_lock_irqsave+0xa2/0x110
[  335.424490]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  335.425202]  ? __kthread_parkme+0x82/0x160
[  335.425882]  ? preempt_count_sub+0x50/0x80
[  335.426354]  ? __pfx_kunit_try_run_case+0x10/0x10
[  335.427254]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  335.428397]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  335.429387]  kthread+0x257/0x310
[  335.430351]  ? __pfx_kthread+0x10/0x10
[  335.431235]  ret_from_fork+0x41/0x80
[  335.431675]  ? __pfx_kthread+0x10/0x10
[  335.432921]  ret_from_fork_asm+0x1a/0x30
[  335.434068]  </TASK>
[  335.434393] ---[ end trace 0000000000000000 ]---