Extracting prog: 8m1.488465282s
Minimizing prog: 41m51.979354623s
Simplifying prog options: 14m50.083405815s
Extracting C: 5m15.781799051s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_GETRESOURCES-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
r1 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_GETRESOURCES(r1, 0xc04064a0, &(0x7f0000000180)={0x0, &(0x7f0000000140)=[<r2=>0x0], 0x0, 0x0, 0x0, 0x1})
ioctl$DRM_IOCTL_MODE_CURSOR(r0, 0xc01c64a3, &(0x7f0000000100)={0x3, r2, 0x40000, 0x9, 0xb, 0x1fd, 0x1})

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_GETRESOURCES-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
r1 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_GETRESOURCES(r1, 0xc04064a0, &(0x7f0000000180)={0x0, &(0x7f0000000140)=[<r2=>0x0], 0x0, 0x0, 0x0, 0x1})
ioctl$DRM_IOCTL_MODE_CURSOR(r0, 0xc01c64a3, &(0x7f0000000100)={0x3, r2, 0x40000, 0x9, 0xb, 0x1fd, 0x1})

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_GETRESOURCES-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
r1 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_GETRESOURCES(r1, 0xc04064a0, &(0x7f0000000180)={0x0, &(0x7f0000000140)=[<r2=>0x0], 0x0, 0x0, 0x0, 0x1})
ioctl$DRM_IOCTL_MODE_CURSOR(r0, 0xc01c64a3, &(0x7f0000000100)={0x3, r2, 0x40000, 0x9, 0xb, 0x1fd, 0x1})

program crashed: WARNING in vkms_get_vblank_timestamp
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=6m41.411048538s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_GETRESOURCES
detailed listing:
executing program 0:
syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
r0 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_GETRESOURCES(r0, 0xc04064a0, &(0x7f0000000180)={0x0, &(0x7f0000000140)=[0x0], 0x0, 0x0, 0x0, 0x1})

program did not crash
testing program (duration=6m41.411048538s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_CURSOR(r0, 0xc01c64a3, &(0x7f0000000100)={0x3, 0x0, 0x40000, 0x9, 0xb, 0x1fd, 0x1})

program crashed: WARNING in call_timer_fn
testing program (duration=6m41.411048538s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_CURSOR(r0, 0xc01c64a3, &(0x7f0000000100)={0x3, 0x0, 0x40000, 0x9, 0xb, 0x1fd, 0x1})

program did not crash
testing program (duration=6m41.411048538s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_CURSOR(0xffffffffffffffff, 0xc01c64a3, &(0x7f0000000100)={0x3, 0x0, 0x40000, 0x9, 0xb, 0x1fd, 0x1})

program did not crash
testing program (duration=6m41.411048538s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(0x0, 0x1ff, 0x0)
syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_CURSOR(r0, 0xc01c64a3, &(0x7f0000000100)={0x3, 0x0, 0x40000, 0x9, 0xb, 0x1fd, 0x1})

program did not crash
testing program (duration=6m41.411048538s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
syz_open_dev$dri(0x0, 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_CURSOR(r0, 0xc01c64a3, &(0x7f0000000100)={0x3, 0x0, 0x40000, 0x9, 0xb, 0x1fd, 0x1})

program crashed: WARNING in vkms_get_vblank_timestamp
testing program (duration=6m41.411048538s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
syz_open_dev$dri(0x0, 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_CURSOR(r0, 0xc01c64a3, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m41.411048538s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CURSOR
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m41.411048538s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
syz_open_dev$dri(0x0, 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_CURSOR(r0, 0xc01c64a3, &(0x7f0000000100)={0x3, 0x0, 0x40000, 0x9, 0xb, 0x1fd, 0x1})

program did not crash
testing program (duration=6m41.411048538s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$dri-syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CURSOR
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000000), 0x1ff, 0x0)
syz_open_dev$dri(0x0, 0x1ff, 0x0)
ioctl$DRM_IOCTL_MODE_CURSOR(r0, 0xc01c64a3, &(0x7f0000000100)={0x3, 0x0, 0x40000, 0x9, 0xb, 0x1fd, 0x1})

program did not crash
reproducing took 1h9m59.333041211s
repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6071 at drivers/gpu/drm/vkms/vkms_crtc.c:100 vkms_get_vblank_timestamp+0x183/0x1b0 drivers/gpu/drm/vkms/vkms_crtc.c:100
Modules linked in:
CPU: 0 UID: 0 PID: 6071 Comm: syz.1.234 Not tainted 6.12.0-rc5-syzkaller-00181-g6c52d4da1c74 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:vkms_get_vblank_timestamp+0x183/0x1b0 drivers/gpu/drm/vkms/vkms_crtc.c:100
Code: 42 80 3c 30 00 74 08 48 89 ef e8 d8 ee 09 fc 48 89 5d 00 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 0e 2f a0 fb 90 <0f> 0b 90 eb e4 89 d9 80 e1 07 38 c1 0f 8c cd fe ff ff 48 89 df e8
RSP: 0018:ffffc9000e1976c8 EFLAGS: 00010293
RAX: ffffffff85f4ab12 RBX: 00000067acd4df3a RCX: ffff888033ce0000
RDX: 0000000000000000 RSI: 00000067acd4df3a RDI: 00000067acd4df3a
RBP: ffffc9000e197860 R08: ffffffff85f4aa7f R09: 0000000000000000
R10: ffffc900017c1000 R11: ffffffff85f4a990 R12: 00000067acd4df3a
R13: ffff88801e35e150 R14: 1ffff92001c32f0c R15: ffff88801e080000
FS:  00005555819d3500(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00236a000 CR3: 0000000035ef4000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_crtc_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:878 [inline]
 drm_crtc_next_vblank_start+0x229/0x490 drivers/gpu/drm/drm_vblank.c:1012
 set_fence_deadline drivers/gpu/drm/drm_atomic_helper.c:1558 [inline]
 drm_atomic_helper_wait_for_fences+0x277/0x8e0 drivers/gpu/drm/drm_atomic_helper.c:1605
 drm_atomic_helper_commit+0x53a/0x9f0 drivers/gpu/drm/drm_atomic_helper.c:2034
 drm_atomic_commit+0x296/0x2f0 drivers/gpu/drm/drm_atomic.c:1516
 drm_client_modeset_commit_atomic+0x676/0x7e0 drivers/gpu/drm/drm_client_modeset.c:1068
 drm_client_modeset_commit_locked+0xe0/0x520 drivers/gpu/drm/drm_client_modeset.c:1171
 drm_client_modeset_commit+0x4a/0x70 drivers/gpu/drm/drm_client_modeset.c:1197
 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:237 [inline]
 drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:264 [inline]
 drm_fb_helper_lastclose+0xbb/0x180 drivers/gpu/drm/drm_fb_helper.c:2003
 drm_fbdev_shmem_client_restore+0x34/0x40 drivers/gpu/drm/drm_fbdev_shmem.c:229
 drm_client_dev_restore+0x132/0x270 drivers/gpu/drm/drm_client.c:260
 drm_lastclose drivers/gpu/drm/drm_file.c:391 [inline]
 drm_release+0x335/0x410 drivers/gpu/drm/drm_file.c:424
 __fput+0x23f/0x880 fs/file_table.c:431
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f503d77e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe1b810108 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000006cb49 RCX: 00007f503d77e719
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f503d937a80 R08: 0000000000000001 R09: 00007ffe1b8103ff
R10: 00007f503d600000 R11: 0000000000000246 R12: 000000000006cb91
R13: 00007ffe1b810210 R14: 0000000000000032 R15: ffffffffffffffff
 </TASK>

final repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6071 at drivers/gpu/drm/vkms/vkms_crtc.c:100 vkms_get_vblank_timestamp+0x183/0x1b0 drivers/gpu/drm/vkms/vkms_crtc.c:100
Modules linked in:
CPU: 0 UID: 0 PID: 6071 Comm: syz.1.234 Not tainted 6.12.0-rc5-syzkaller-00181-g6c52d4da1c74 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:vkms_get_vblank_timestamp+0x183/0x1b0 drivers/gpu/drm/vkms/vkms_crtc.c:100
Code: 42 80 3c 30 00 74 08 48 89 ef e8 d8 ee 09 fc 48 89 5d 00 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 0e 2f a0 fb 90 <0f> 0b 90 eb e4 89 d9 80 e1 07 38 c1 0f 8c cd fe ff ff 48 89 df e8
RSP: 0018:ffffc9000e1976c8 EFLAGS: 00010293
RAX: ffffffff85f4ab12 RBX: 00000067acd4df3a RCX: ffff888033ce0000
RDX: 0000000000000000 RSI: 00000067acd4df3a RDI: 00000067acd4df3a
RBP: ffffc9000e197860 R08: ffffffff85f4aa7f R09: 0000000000000000
R10: ffffc900017c1000 R11: ffffffff85f4a990 R12: 00000067acd4df3a
R13: ffff88801e35e150 R14: 1ffff92001c32f0c R15: ffff88801e080000
FS:  00005555819d3500(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00236a000 CR3: 0000000035ef4000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_crtc_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:878 [inline]
 drm_crtc_next_vblank_start+0x229/0x490 drivers/gpu/drm/drm_vblank.c:1012
 set_fence_deadline drivers/gpu/drm/drm_atomic_helper.c:1558 [inline]
 drm_atomic_helper_wait_for_fences+0x277/0x8e0 drivers/gpu/drm/drm_atomic_helper.c:1605
 drm_atomic_helper_commit+0x53a/0x9f0 drivers/gpu/drm/drm_atomic_helper.c:2034
 drm_atomic_commit+0x296/0x2f0 drivers/gpu/drm/drm_atomic.c:1516
 drm_client_modeset_commit_atomic+0x676/0x7e0 drivers/gpu/drm/drm_client_modeset.c:1068
 drm_client_modeset_commit_locked+0xe0/0x520 drivers/gpu/drm/drm_client_modeset.c:1171
 drm_client_modeset_commit+0x4a/0x70 drivers/gpu/drm/drm_client_modeset.c:1197
 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:237 [inline]
 drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:264 [inline]
 drm_fb_helper_lastclose+0xbb/0x180 drivers/gpu/drm/drm_fb_helper.c:2003
 drm_fbdev_shmem_client_restore+0x34/0x40 drivers/gpu/drm/drm_fbdev_shmem.c:229
 drm_client_dev_restore+0x132/0x270 drivers/gpu/drm/drm_client.c:260
 drm_lastclose drivers/gpu/drm/drm_file.c:391 [inline]
 drm_release+0x335/0x410 drivers/gpu/drm/drm_file.c:424
 __fput+0x23f/0x880 fs/file_table.c:431
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f503d77e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe1b810108 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000006cb49 RCX: 00007f503d77e719
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f503d937a80 R08: 0000000000000001 R09: 00007ffe1b8103ff
R10: 00007f503d600000 R11: 0000000000000246 R12: 000000000006cb91
R13: 00007ffe1b810210 R14: 0000000000000032 R15: ffffffffffffffff
 </TASK>