syzbot

 drm_fb_helper_single_fb_probe drivers/gpu/drm/drm_fb_helper.c:1668 [inline]
 __drm_fb_helper_initial_config_and_unlock+0xc31/0x1600 drivers/gpu/drm/drm_fb_helper.c:1846
 drm_fb_helper_initial_config drivers/gpu/drm/drm_fb_helper.c:1936 [inline]
 drm_fb_helper_initial_config+0x44/0x60 drivers/gpu/drm/drm_fb_helper.c:1928
 drm_fbdev_generic_client_hotplug+0x1a7/0x270 drivers/gpu/drm/drm_fbdev_generic.c:280
 drm_client_register+0x195/0x280 drivers/gpu/drm/drm_client.c:149
 drm_fbdev_generic_setup+0x11c/0x330 drivers/gpu/drm/drm_fbdev_generic.c:342
 vkms_create drivers/gpu/drm/vkms/vkms_drv.c:208 [inline]
 vkms_init+0x625/0x760 drivers/gpu/drm/vkms/vkms_drv.c:234
 do_one_initcall+0x117/0x630 init/main.c:1232
 do_initcall_level init/main.c:1294 [inline]
 do_initcalls init/main.c:1310 [inline]
 do_basic_setup init/main.c:1329 [inline]
 kernel_init_freeable+0x5bd/0x8f0 init/main.c:1546
page_owner free stack trace missing
------------[ cut here ]------------
kernel BUG at mm/memory.c:2955!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5023 Comm: syz-executor222 Not tainted 6.5.0-syzkaller-00453-g727dbda16b83 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:do_page_mkwrite+0x468/0x680 mm/memory.c:2955
Code: de e8 6c 7c c1 ff 84 db 0f 85 c1 00 00 00 48 89 eb e9 76 fe ff ff e8 27 81 c1 ff 48 c7 c6 a0 e7 78 8a 48 89 ef e8 88 3d fe ff <0f> 0b 41 bc 02 00 00 00 e9 99 fe ff ff e8 06 81 c1 ff be 0c 04 00
RSP: 0018:ffffc9000399fba8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888029153b80 RSI: ffffffff81c48c48 RDI: ffffffff8ac851a0
RBP: ffffea00051fb440 R08: 0000000000000000 R09: fffffbfff1d5748a
R10: ffffffff8eaba457 R11: 1ffffffff1936441 R12: 0000000000000200
R13: ffffea00051fb440 R14: 0000000000000a55 R15: 0000000000000000
FS:  00005555560ab380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000008 CR3: 000000001fa3d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 wp_page_shared mm/memory.c:3294 [inline]
 do_wp_page+0x3a0/0x3710 mm/memory.c:3376
 handle_pte_fault mm/memory.c:4955 [inline]
 __handle_mm_fault+0x1af7/0x3b80 mm/memory.c:5079
 handle_mm_fault+0x2ab/0x9d0 mm/memory.c:5233
 do_user_addr_fault+0x446/0xfc0 arch/x86/mm/fault.c:1392
 handle_page_fault arch/x86/mm/fault.c:1486 [inline]
 exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1542
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7faa4440f726
Code: 00 01 ba 00 60 b3 00 31 c0 68 00 c0 2f 00 41 b8 11 80 02 00 be 00 00 00 20 4c 8b 0d bc 69 0a 00 bf 09 00 00 00 e8 2a fc 02 00 <c6> 04 25 08 00 00 20 00 45 31 c0 48 b8 2f 64 65 76 2f 66 62 30 b9
RSP: 002b:00007ffc01834060 EFLAGS: 00010217
RAX: 0000000020000000 RBX: 00007ffc01834238 RCX: 00007faa4443f369
RDX: 0000000001000006 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007faa444b2610 R08: 0000000000000004 R09: 00000000002fc000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc01834228 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:do_page_mkwrite+0x468/0x680 mm/memory.c:2955
Code: de e8 6c 7c c1 ff 84 db 0f 85 c1 00 00 00 48 89 eb e9 76 fe ff ff e8 27 81 c1 ff 48 c7 c6 a0 e7 78 8a 48 89 ef e8 88 3d fe ff <0f> 0b 41 bc 02 00 00 00 e9 99 fe ff ff e8 06 81 c1 ff be 0c 04 00
RSP: 0018:ffffc9000399fba8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888029153b80 RSI: ffffffff81c48c48 RDI: ffffffff8ac851a0
RBP: ffffea00051fb440 R08: 0000000000000000 R09: fffffbfff1d5748a
R10: ffffffff8eaba457 R11: 1ffffffff1936441 R12: 0000000000000200
R13: ffffea00051fb440 R14: 0000000000000a55 R15: 0000000000000000
FS:  00005555560ab380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056269e66d0e8 CR3: 000000001fa3d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400