Hello, syzbot found the following issue on: HEAD commit: 6d69b6c12fce Merge tag 'nfs-for-6.10-1' of git://git.linux.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14dbcda4980000 kernel config: https://syzkaller.appspot.com/x/.config?x=aeb4d28a6349ece dashboard link: https://syzkaller.appspot.com/bug?extid=0ac28002caff799b9e57 compiler: arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/8ead8862021c/non_bootable_disk-6d69b6c1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/85d8b411b76d/vmlinux-6d69b6c1.xz kernel image: https://storage.googleapis.com/syzbot-assets/a9fe9b7875f4/zImage-6d69b6c1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0ac28002caff799b9e57@xxxxxxxxxxxxxxxxxxxxxxxxx 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 6.9.0-syzkaller #0 Hardware name: ARM-Versatile Express Workqueue: events output_poll_execute Call trace: [<818d5898>] (dump_backtrace) from [<818d5994>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:82622d44 r5:00000000 r4:81fe1500 [<818d597c>] (show_stack) from [<818f2fa4>] (__dump_stack lib/dump_stack.c:88 [inline]) [<818d597c>] (show_stack) from [<818f2fa4>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:114) [<818f2f50>] (dump_stack_lvl) from [<818f2fe4>] (dump_stack+0x18/0x1c lib/dump_stack.c:123) r5:00000000 r4:8285fd18 [<818f2fcc>] (dump_stack) from [<818d643c>] (panic+0x120/0x358 kernel/panic.c:347) [<818d631c>] (panic) from [<80243dcc>] (check_panic_on_warn kernel/panic.c:240 [inline]) [<818d631c>] (panic) from [<80243dcc>] (print_tainted+0x0/0xa0 kernel/panic.c:235) r3:8260c5c4 r2:00000001 r1:81fca178 r0:81fd1dc8 r7:80a1fec0 [<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 r7:820530fc r6:df87dbdc r5:82e3b000 r4:00000000 [<802440c8>] (warn_slowpath_fmt) from [<80a1fec0>] (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 r6:8405db00 r5:83ee5050 r4:00000000 [<80a1fc5c>] (drm_atomic_helper_wait_for_vblanks.part.0) from [<80a2130c>] (drm_atomic_helper_wait_for_vblanks drivers/gpu/drm/drm_atomic_helper.c:1658 [inline]) [<80a1fc5c>] (drm_atomic_helper_wait_for_vblanks.part.0) from [<80a2130c>] (drm_atomic_helper_commit_tail+0x84/0x94 drivers/gpu/drm/drm_atomic_helper.c:1758) r10:8421269c r9:00000000 r8:00000000 r7:00000001 r6:217c7950 r5:841df000 r4:8405db00 [<80a21288>] (drm_atomic_helper_commit_tail) from [<80a22910>] (commit_tail+0x178/0x1a0 drivers/gpu/drm/drm_atomic_helper.c:1835) r5:00000000 r4:8405db00 [<80a22798>] (commit_tail) from [<80a22aa0>] (drm_atomic_helper_commit+0x150/0x174 drivers/gpu/drm/drm_atomic_helper.c:2073) r9:00000000 r8:8405db2c r7:00000000 r6:841df000 r5:00000000 r4:8405db00 [<80a22950>] (drm_atomic_helper_commit) from [<809de954>] (drm_atomic_commit+0xc0/0xf4 drivers/gpu/drm/drm_atomic.c:1514) r9:00000000 r8:83ee5520 r7:00000001 r6:841df000 r5:00000000 r4:8405db00 [<809de894>] (drm_atomic_commit) from [<809e51c0>] (drm_client_modeset_commit_atomic+0x21c/0x25c drivers/gpu/drm/drm_client_modeset.c:1063) r6:00000001 r5:841df1ac r4:8405db00 [<809e4fa4>] (drm_client_modeset_commit_atomic) from [<809e52d8>] (drm_client_modeset_commit_locked+0x64/0x18c drivers/gpu/drm/drm_client_modeset.c:1166) r10:841df1ec r9:00000001 r8:841df098 r7:83e71418 r6:83e71400 r5:841df000 r4:841df000 [<809e5274>] (drm_client_modeset_commit_locked) from [<809e542c>] (drm_client_modeset_commit+0x2c/0x48 drivers/gpu/drm/drm_client_modeset.c:1192) r9:00000001 r8:841df098 r7:8204c8e0 r6:83e714b8 r5:841df000 r4:83e71400 [<809e5400>] (drm_client_modeset_commit) from [<80a2fcc8>] (__drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:251 [inline]) [<809e5400>] (drm_client_modeset_commit) from [<80a2fcc8>] (__drm_fb_helper_restore_fbdev_mode_unlocked+0x8c/0xc4 drivers/gpu/drm/drm_fb_helper.c:230) r5:83e71400 r4:00000000 [<80a2fc3c>] (__drm_fb_helper_restore_fbdev_mode_unlocked) from [<80a2fc2c>] (drm_fb_helper_set_par drivers/gpu/drm/drm_fb_helper.c:1344 [inline]) [<80a2fc3c>] (__drm_fb_helper_restore_fbdev_mode_unlocked) from [<80a2fc2c>] (drm_fb_helper_hotplug_event+0xf8/0x108 drivers/gpu/drm/drm_fb_helper.c:1990) r7:8204c8e0 r6:841df0ac r5:83e714b8 r4:83e71400 [<80a2fb34>] (drm_fb_helper_hotplug_event) from [<80a19ed8>] (drm_fbdev_dma_client_hotplug+0x24/0xc8 drivers/gpu/drm/drm_fbdev_dma.c:182) r5:841df000 r4:83e71400 [<80a19eb4>] (drm_fbdev_dma_client_hotplug) from [<809e4750>] (drm_client_dev_hotplug drivers/gpu/drm/drm_client.c:238 [inline]) [<80a19eb4>] (drm_fbdev_dma_client_hotplug) from [<809e4750>] (drm_client_dev_hotplug+0xbc/0x114 drivers/gpu/drm/drm_client.c:217) r7:8204c8e0 r6:841df0ac r5:841df000 r4:83e71400 [<809e4694>] (drm_client_dev_hotplug) from [<80a2a990>] (drm_kms_helper_hotplug_event drivers/gpu/drm/drm_probe_helper.c:738 [inline]) [<809e4694>] (drm_client_dev_hotplug) from [<80a2a990>] (output_poll_execute+0x270/0x2c4 drivers/gpu/drm/drm_probe_helper.c:854) r9:00000001 r8:841df0d8 r7:00000001 r6:841df000 r5:00000001 r4:82cb2180 [<80a2a720>] (output_poll_execute) from [<802671bc>] (process_one_work+0x1c4/0x510 kernel/workqueue.c:3231) r10:82c16205 r9:82e3b000 r8:01800000 r7:ddde40c0 r6:82c16200 r5:841df1ec 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 r8:82cc3e40 r7:82cb2180 r6:80267c04 r5:82e3b000 r4:82cc3c00 [<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 r4:82cc3c00 Rebooting in 86400 seconds.. --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
