syzbot


WARNING in drm_atomic_helper_wait_for_vblanks (3)

Status: upstream: reported on 2024/05/26 13:59
Subsystems: dri
[Documentation on labels]
Reported-by: syzbot+0ac28002caff799b9e57@syzkaller.appspotmail.com
First crash: 23d, last: 3d09h
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly dri report (Jun 2024) 0 (1) 2024/06/10 12:41
[syzbot] [dri?] WARNING in drm_atomic_helper_wait_for_vblanks (3) 0 (1) 2024/05/26 13:59
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in drm_atomic_helper_wait_for_vblanks (2) dri 1 766d 762d 0/27 auto-obsoleted due to no activity on 2022/09/07 08:02
upstream WARNING in drm_atomic_helper_wait_for_vblanks dri 1 895d 891d 0/27 auto-closed as invalid on 2022/05/01 08:40

Sample crash report:
input: AT Raw Set 2 keyboard as /devices/platform/bus@8000000/bus@8000000:motherboard-bus/bus@8000000:motherboard-bus:iofpga-bus@300000000/1c060000.kmi/serio0/input/input0
input: ImExPS/2 Generic Explorer Mouse as /devices/platform/bus@8000000/bus@8000000:motherboard-bus/bus@8000000:motherboard-bus:iofpga-bus@300000000/1c070000.kmi/serio1/input/input2
------------[ cut here ]------------
WARNING: CPU: 1 PID: 24 at drivers/gpu/drm/drm_atomic_helper.c:1682 drm_atomic_helper_wait_for_vblanks.part.0+0x264/0x26c drivers/gpu/drm/drm_atomic_helper.c:1682
[CRTC:34:crtc-0] vblank wait timed out
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.10.0-rc3-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: events output_poll_execute
Call trace: 
[<818d43d8>] (dump_backtrace) from [<818d44d4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:82622d44 r5:00000000 r4:81fe1454
[<818d44bc>] (show_stack) from [<818f1afc>] (__dump_stack lib/dump_stack.c:88 [inline])
[<818d44bc>] (show_stack) from [<818f1afc>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:114)
[<818f1aa8>] (dump_stack_lvl) from [<818f1b3c>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
 r5:00000000 r4:8285fd18
[<818f1b24>] (dump_stack) from [<818d4f7c>] (panic+0x120/0x358 kernel/panic.c:347)
[<818d4e5c>] (panic) from [<80243dcc>] (check_panic_on_warn kernel/panic.c:240 [inline])
[<818d4e5c>] (panic) from [<80243dcc>] (print_tainted+0x0/0xa0 kernel/panic.c:235)
 r3:8260c5c4 r2:00000001 r1:81fca0c4 r0:81fd1d14
 r7:80a1e478
[<80243d58>] (check_panic_on_warn) from [<80243fc0>] (__warn+0x7c/0x180 kernel/panic.c:693)
[<80243f44>] (__warn) from [<802442ac>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:726)
 r8:00000009 r7:82052d38 r6:df87dbdc r5:82e3b000 r4:00000000
[<802440c8>] (warn_slowpath_fmt) from [<80a1e478>] (drm_atomic_helper_wait_for_vblanks.part.0+0x264/0x26c drivers/gpu/drm/drm_atomic_helper.c:1682)
 r10:00000000 r9:00000001 r8:00000001 r7:00000000 r6:84130940 r5:840db050
 r4:00000000
[<80a1e214>] (drm_atomic_helper_wait_for_vblanks.part.0) from [<80a1f8c4>] (drm_atomic_helper_wait_for_vblanks drivers/gpu/drm/drm_atomic_helper.c:1658 [inline])
[<80a1e214>] (drm_atomic_helper_wait_for_vblanks.part.0) from [<80a1f8c4>] (drm_atomic_helper_commit_tail+0x84/0x94 drivers/gpu/drm/drm_atomic_helper.c:1758)
 r10:841389dc r9:00000000 r8:00000000 r7:00000001 r6:973299d0 r5:84090400
 r4:84130940
[<80a1f840>] (drm_atomic_helper_commit_tail) from [<80a20ec8>] (commit_tail+0x178/0x1a0 drivers/gpu/drm/drm_atomic_helper.c:1835)
 r5:00000000 r4:84130940
[<80a20d50>] (commit_tail) from [<80a21058>] (drm_atomic_helper_commit+0x150/0x174 drivers/gpu/drm/drm_atomic_helper.c:2073)
 r9:00000000 r8:8413096c r7:00000000 r6:84090400 r5:00000000 r4:84130940
[<80a20f08>] (drm_atomic_helper_commit) from [<809dce2c>] (drm_atomic_commit+0xc0/0xf4 drivers/gpu/drm/drm_atomic.c:1514)
 r9:00000000 r8:840db520 r7:00000001 r6:84090400 r5:00000000 r4:84130940
[<809dcd6c>] (drm_atomic_commit) from [<809e3698>] (drm_client_modeset_commit_atomic+0x21c/0x25c drivers/gpu/drm/drm_client_modeset.c:1063)
 r6:00000001 r5:840905ac r4:84130940
[<809e347c>] (drm_client_modeset_commit_atomic) from [<809e37b0>] (drm_client_modeset_commit_locked+0x64/0x18c drivers/gpu/drm/drm_client_modeset.c:1166)
 r10:840905ec r9:00000001 r8:84090498 r7:840ad618 r6:840ad600 r5:84090400
 r4:84090400
[<809e374c>] (drm_client_modeset_commit_locked) from [<809e3904>] (drm_client_modeset_commit+0x2c/0x48 drivers/gpu/drm/drm_client_modeset.c:1192)
 r9:00000001 r8:84090498 r7:8204c4f4 r6:840ad6b8 r5:84090400 r4:840ad600
[<809e38d8>] (drm_client_modeset_commit) from [<80a2e280>] (__drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:251 [inline])
[<809e38d8>] (drm_client_modeset_commit) from [<80a2e280>] (__drm_fb_helper_restore_fbdev_mode_unlocked+0x8c/0xc4 drivers/gpu/drm/drm_fb_helper.c:230)
 r5:840ad600 r4:00000000
[<80a2e1f4>] (__drm_fb_helper_restore_fbdev_mode_unlocked) from [<80a2e1e4>] (drm_fb_helper_set_par drivers/gpu/drm/drm_fb_helper.c:1344 [inline])
[<80a2e1f4>] (__drm_fb_helper_restore_fbdev_mode_unlocked) from [<80a2e1e4>] (drm_fb_helper_hotplug_event+0xf8/0x108 drivers/gpu/drm/drm_fb_helper.c:1990)
 r7:8204c4f4 r6:840904ac r5:840ad6b8 r4:840ad600
[<80a2e0ec>] (drm_fb_helper_hotplug_event) from [<80a183b0>] (drm_fbdev_dma_client_hotplug+0x24/0xc8 drivers/gpu/drm/drm_fbdev_dma.c:182)
 r5:84090400 r4:840ad600
[<80a1838c>] (drm_fbdev_dma_client_hotplug) from [<809e2c28>] (drm_client_dev_hotplug drivers/gpu/drm/drm_client.c:238 [inline])
[<80a1838c>] (drm_fbdev_dma_client_hotplug) from [<809e2c28>] (drm_client_dev_hotplug+0xbc/0x114 drivers/gpu/drm/drm_client.c:217)
 r7:8204c4f4 r6:840904ac r5:84090400 r4:840ad600
[<809e2b6c>] (drm_client_dev_hotplug) from [<80a28f48>] (drm_kms_helper_hotplug_event drivers/gpu/drm/drm_probe_helper.c:738 [inline])
[<809e2b6c>] (drm_client_dev_hotplug) from [<80a28f48>] (output_poll_execute+0x270/0x2c4 drivers/gpu/drm/drm_probe_helper.c:854)
 r9:00000001 r8:840904d8 r7:00000001 r6:84090400 r5:00000001 r4:82cb2180
[<80a28cd8>] (output_poll_execute) from [<802671bc>] (process_one_work+0x1c4/0x510 kernel/workqueue.c:3231)
 r10:82c16205 r9:82e3b000 r8:01800000 r7:ddde40c0 r6:82c16200 r5:840905ec
 r4:82cb2180
[<80266ff8>] (process_one_work) from [<80267df0>] (process_scheduled_works kernel/workqueue.c:3312 [inline])
[<80266ff8>] (process_one_work) from [<80267df0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3393)
 r10:82e3b000 r9:82cb21ac r8:61c88647 r7:ddde40e0 r6:82604d40 r5:ddde40c0
 r4:82cb2180
[<80267c04>] (worker_thread) from [<80271228>] (kthread+0x104/0x134 kernel/kthread.c:389)
 r10:00000000 r9:df819d60 r8:82cc3e80 r7:82cb2180 r6:80267c04 r5:82e3b000
 r4:82cc3c40
[<80271124>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:134)
Exception stack(0xdf87dfb0 to 0xdf87dff8)
dfa0:                                     00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80271124 r4:82cc3c40
Rebooting in 86400 seconds..

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/11 20:31 upstream 83a7eefedc9b 4d75f4f7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in drm_atomic_helper_wait_for_vblanks
2024/06/10 12:50 upstream 83a7eefedc9b 82c05ab8 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in drm_atomic_helper_wait_for_vblanks
2024/06/06 23:56 upstream 2df0193e62cf 121701b6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in drm_atomic_helper_wait_for_vblanks
2024/06/05 20:15 upstream 71d7b52cc33b 32d786e7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in drm_atomic_helper_wait_for_vblanks
2024/05/31 04:12 upstream 4a4be1ad3a6e 34889ee3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in drm_atomic_helper_wait_for_vblanks
2024/05/28 02:21 upstream 2bfcfd584ff5 f550015e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in drm_atomic_helper_wait_for_vblanks
2024/05/24 03:21 upstream 6d69b6c12fce 8f98448e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in drm_atomic_helper_wait_for_vblanks
2024/05/22 13:53 upstream 29c73fc794c8 6d22fe32 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in drm_atomic_helper_wait_for_vblanks
* Struck through repros no longer work on HEAD.