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Date
July 8, 2025, 4:38 p.m.

Environment
qemu-x86_64 

------------[ cut here ]------------
[  144.154962] WARNING: CPU: 1 PID: 2740 at drivers/gpu/drm/drm_rect.c:137 drm_rect_calc_vscale+0x130/0x190
[  144.156135] Modules linked in:
[  144.156328] CPU: 1 UID: 0 PID: 2740 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.6-rc1 #1 PREEMPT(voluntary) 
[  144.156751] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  144.157285] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  144.157633] RIP: 0010:drm_rect_calc_vscale+0x130/0x190
[  144.157984] Code: 7f 43 41 39 ce 7c 3e 48 83 c4 08 89 c8 5b 41 5c 41 5d 41 5e 5d c3 cc cc cc cc 8d 44 08 ff 99 f7 f9 89 c1 85 c0 79 d6 eb de 90 <0f> 0b 90 b9 ea ff ff ff 48 83 c4 08 5b 89 c8 41 5c 41 5d 41 5e 5d
[  144.159060] RSP: 0000:ffff88810327fc78 EFLAGS: 00010286
[  144.159257] RAX: 00000000ffff0000 RBX: 00000000ffff0000 RCX: 0000000000010000
[  144.159471] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ffffffff94824afc
[  144.159713] RBP: ffff88810327fca0 R08: 0000000000000000 R09: ffffed10205db7e0
[  144.160495] R10: ffff888102edbf07 R11: 0000000000000000 R12: ffffffff94824ae8
[  144.160988] R13: 0000000000000000 R14: 000000007fffffff R15: ffff88810327fd38
[  144.161260] FS:  0000000000000000(0000) GS:ffff8881c4990000(0000) knlGS:0000000000000000
[  144.161756] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  144.162266] CR2: 00007ffff7ffe000 CR3: 00000000720ba000 CR4: 00000000000006f0
[  144.162570] DR0: ffffffff96833900 DR1: ffffffff96833901 DR2: ffffffff96833903
[  144.163116] DR3: ffffffff96833905 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  144.163420] Call Trace:
[  144.163545]  <TASK>
[  144.164105]  drm_test_rect_calc_vscale+0x108/0x270
[  144.164312]  ? __kasan_check_write+0x18/0x20
[  144.164715]  ? __pfx_drm_test_rect_calc_vscale+0x10/0x10
[  144.165108]  ? __pfx_queued_spin_lock_slowpath+0x10/0x10
[  144.165368]  ? __pfx_read_tsc+0x10/0x10
[  144.165550]  ? ktime_get_ts64+0x86/0x230
[  144.165841]  kunit_try_run_case+0x1a5/0x480
[  144.166381]  ? __pfx_kunit_try_run_case+0x10/0x10
[  144.166644]  ? _raw_spin_lock_irqsave+0xf9/0x100
[  144.166853]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  144.167306]  ? __kthread_parkme+0x82/0x180
[  144.167511]  ? preempt_count_sub+0x50/0x80
[  144.168035]  ? __pfx_kunit_try_run_case+0x10/0x10
[  144.168282]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  144.168522]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  144.169096]  kthread+0x337/0x6f0
[  144.169256]  ? trace_preempt_on+0x20/0xc0
[  144.169602]  ? __pfx_kthread+0x10/0x10
[  144.169974]  ? _raw_spin_unlock_irq+0x47/0x80
[  144.170195]  ? calculate_sigpending+0x7b/0xa0
[  144.170394]  ? __pfx_kthread+0x10/0x10
[  144.170634]  ret_from_fork+0x41/0x80
[  144.170814]  ? __pfx_kthread+0x10/0x10
[  144.171142]  ret_from_fork_asm+0x1a/0x30
[  144.171371]  </TASK>
[  144.171467] ---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
[  144.175311] WARNING: CPU: 1 PID: 2742 at drivers/gpu/drm/drm_rect.c:137 drm_rect_calc_vscale+0x130/0x190
[  144.175629] Modules linked in:
[  144.175769] CPU: 1 UID: 0 PID: 2742 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.6-rc1 #1 PREEMPT(voluntary) 
[  144.176749] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  144.177676] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  144.178726] RIP: 0010:drm_rect_calc_vscale+0x130/0x190
[  144.179508] Code: 7f 43 41 39 ce 7c 3e 48 83 c4 08 89 c8 5b 41 5c 41 5d 41 5e 5d c3 cc cc cc cc 8d 44 08 ff 99 f7 f9 89 c1 85 c0 79 d6 eb de 90 <0f> 0b 90 b9 ea ff ff ff 48 83 c4 08 5b 89 c8 41 5c 41 5d 41 5e 5d
[  144.180386] RSP: 0000:ffff888105257c78 EFLAGS: 00010286
[  144.181038] RAX: 0000000000010000 RBX: 00000000ffff0000 RCX: 00000000ffff0000
[  144.181823] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ffffffff94824b34
[  144.182526] RBP: ffff888105257ca0 R08: 0000000000000000 R09: ffffed10205dbe20
[  144.182747] R10: ffff888102edf107 R11: 0000000000000000 R12: ffffffff94824b20
[  144.183427] R13: 0000000000000000 R14: 000000007fffffff R15: ffff888105257d38
[  144.184182] FS:  0000000000000000(0000) GS:ffff8881c4990000(0000) knlGS:0000000000000000
[  144.184766] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  144.185257] CR2: 00007ffff7ffe000 CR3: 00000000720ba000 CR4: 00000000000006f0
[  144.185675] DR0: ffffffff96833900 DR1: ffffffff96833901 DR2: ffffffff96833903
[  144.186072] DR3: ffffffff96833905 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  144.187085] Call Trace:
[  144.187215]  <TASK>
[  144.187311]  drm_test_rect_calc_vscale+0x108/0x270
[  144.187481]  ? __pfx_drm_test_rect_calc_vscale+0x10/0x10
[  144.187652]  ? __schedule+0x10cc/0x2b60
[  144.187790]  ? __pfx_read_tsc+0x10/0x10
[  144.187937]  ? ktime_get_ts64+0x86/0x230
[  144.188512]  kunit_try_run_case+0x1a5/0x480
[  144.188913]  ? __pfx_kunit_try_run_case+0x10/0x10
[  144.189129]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  144.189292]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  144.189461]  ? __kthread_parkme+0x82/0x180
[  144.190759]  ? preempt_count_sub+0x50/0x80
[  144.192405]  ? __pfx_kunit_try_run_case+0x10/0x10
[  144.192838]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  144.193359]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  144.194079]  kthread+0x337/0x6f0
[  144.194218]  ? trace_preempt_on+0x20/0xc0
[  144.194368]  ? __pfx_kthread+0x10/0x10
[  144.194503]  ? _raw_spin_unlock_irq+0x47/0x80
[  144.194654]  ? calculate_sigpending+0x7b/0xa0
[  144.194803]  ? __pfx_kthread+0x10/0x10
[  144.194980]  ret_from_fork+0x41/0x80
[  144.195118]  ? __pfx_kthread+0x10/0x10
[  144.195359]  ret_from_fork_asm+0x1a/0x30
[  144.195518]  </TASK>
[  144.195616] ---[ end trace 0000000000000000 ]---
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