Warning: Permanently added '10.128.0.199' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 74.980883][ T3003] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 75.360959][ T3003] usb 1-1: New USB device found, idVendor=17e9, idProduct=8226, bcdDevice=81.18 [ 75.370836][ T3003] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 75.387190][ T3003] usb 1-1: config 0 descriptor?? executing program [ 75.720917][ T3003] udlfb 1-1:0.0: vendor descriptor not available (-71) [ 75.740781][ T3003] usb 1-1: Read EDID byte 0 failed: -71 [ 75.770748][ T3003] usb 1-1: Read EDID byte 0 failed: -71 [ 75.800919][ T3003] usb 1-1: Read EDID byte 0 failed: -71 [ 75.806638][ T3003] usb 1-1: Unable to get valid EDID from device/display [ 75.834060][ T3003] usb 1-1: submit urb error: -2 [ 75.841943][ T3003] udlfb: probe of 1-1:0.0 failed with error -2 [ 75.920744][ T3003] [drm] vendor descriptor length:b9 data:00 00 00 00 00 00 00 00 00 00 00 [ 75.929747][ T3003] [drm:udl_init.cold] *ERROR* Unrecognized vendor firmware descriptor [ 75.950790][ T3003] [drm:udl_init] *ERROR* Selecting channel failed [ 75.971051][ T3003] [drm] Initialized udl 0.0.1 20120220 for 1-1:0.0 on minor 2 [ 75.978574][ T3003] [drm] Initialized udl on minor 2 [ 76.000825][ T3003] [drm:udl_get_edid_block] *ERROR* Read EDID byte 0 failed err ffffffb9 [ 76.011320][ T3003] udl 1-1:0.0: [drm] Cannot find any crtc or sizes [ 76.022787][ T3003] usb 1-1: USB disconnect, device number 2 [ 76.033841][ T3003] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 76.046454][ T3003] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 76.055577][ T3003] CPU: 0 PID: 3003 Comm: kworker/0:2 Not tainted 5.11.0-rc5-syzkaller #0 [ 76.064450][ T3003] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.074602][ T3003] Workqueue: usb_hub_wq hub_event [ 76.079758][ T3003] RIP: 0010:drm_client_buffer_vunmap+0x26/0x50 [ 76.086145][ T3003] Code: 00 00 00 00 53 48 89 fb 48 83 ec 08 e8 43 07 3c fd 48 8d 7b 10 48 b8 00 00 00 00 00 fc ff df 48 8d 73 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 0e 48 8b 7b 10 48 83 c4 08 5b e9 66 56 f7 ff 48 89 [ 76.106032][ T3003] RSP: 0018:ffffc900013b7710 EFLAGS: 00010202 [ 76.112450][ T3003] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 76.120519][ T3003] RDX: 0000000000000002 RSI: 0000000000000018 RDI: 0000000000000010 [ 76.129370][ T3003] RBP: ffff888011e220c8 R08: 0000000000000000 R09: ffff888011e22217 [ 76.137353][ T3003] R10: ffffed10023c4442 R11: 1ffffffff1d39cbc R12: 0000000000000000 [ 76.145339][ T3003] R13: ffff888011e220d8 R14: ffff888011e22010 R15: dead000000000100 [ 76.153926][ T3003] FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 76.163009][ T3003] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.169620][ T3003] CR2: 00007ffed348d5b7 CR3: 0000000020f5f000 CR4: 00000000001506f0 [ 76.177608][ T3003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.185589][ T3003] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.193551][ T3003] Call Trace: [ 76.196818][ T3003] drm_fbdev_cleanup+0x380/0x440 [ 76.202720][ T3003] ? drm_fbdev_cleanup+0x440/0x440 [ 76.208031][ T3003] drm_fbdev_client_unregister+0x61/0x80 [ 76.215527][ T3003] drm_client_dev_unregister+0x239/0x3b0 [ 76.221334][ T3003] drm_dev_unregister+0xe9/0x2b0 [ 76.226285][ T3003] usb_unbind_interface+0x1d8/0x8d0 [ 76.231477][ T3003] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 76.237191][ T3003] ? kernfs_remove_by_name_ns+0x62/0xb0 [ 76.243684][ T3003] ? usb_unbind_device+0x1a0/0x1a0 [ 76.248806][ T3003] __device_release_driver+0x3bd/0x6f0 [ 76.254273][ T3003] device_release_driver+0x26/0x40 [ 76.259419][ T3003] bus_remove_device+0x2eb/0x5a0 [ 76.264622][ T3003] device_del+0x502/0xd40 [ 76.268968][ T3003] ? __device_links_queue_sync_state+0x3f0/0x3f0 [ 76.275505][ T3003] ? pm_runtime_barrier+0xdc/0x1a0 [ 76.280632][ T3003] usb_disable_device+0x35b/0x7b0 [ 76.285750][ T3003] usb_disconnect.cold+0x27d/0x780 [ 76.290938][ T3003] hub_event+0x1c8a/0x42d0 [ 76.295376][ T3003] ? hub_port_debounce+0x3b0/0x3b0 [ 76.300485][ T3003] ? lock_release+0x710/0x710 [ 76.305187][ T3003] ? lock_downgrade+0x6d0/0x6d0 [ 76.310051][ T3003] ? do_raw_spin_lock+0x120/0x2b0 [ 76.315440][ T3003] process_one_work+0x98d/0x15f0 [ 76.320511][ T3003] ? pwq_dec_nr_in_flight+0x320/0x320 [ 76.326075][ T3003] ? rwlock_bug.part.0+0x90/0x90 [ 76.331046][ T3003] ? _raw_spin_lock_irq+0x41/0x50 [ 76.336080][ T3003] worker_thread+0x82b/0x1120 [ 76.340757][ T3003] ? __kthread_parkme+0x13f/0x1e0 [ 76.345780][ T3003] ? process_one_work+0x15f0/0x15f0 [ 76.350983][ T3003] kthread+0x3b1/0x4a0 [ 76.355042][ T3003] ? __kthread_bind_mask+0xc0/0xc0 [ 76.360157][ T3003] ret_from_fork+0x1f/0x30 [ 76.364829][ T3003] Modules linked in: [ 76.369573][ T3003] ---[ end trace 95bc34805464e6c9 ]--- [ 76.375109][ T3003] RIP: 0010:drm_client_buffer_vunmap+0x26/0x50 [ 76.381446][ T3003] Code: 00 00 00 00 53 48 89 fb 48 83 ec 08 e8 43 07 3c fd 48 8d 7b 10 48 b8 00 00 00 00 00 fc ff df 48 8d 73 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 0e 48 8b 7b 10 48 83 c4 08 5b e9 66 56 f7 ff 48 89 [ 76.401516][ T3003] RSP: 0018:ffffc900013b7710 EFLAGS: 00010202 [ 76.407922][ T3003] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 76.416400][ T3003] RDX: 0000000000000002 RSI: 0000000000000018 RDI: 0000000000000010 [ 76.424535][ T3003] RBP: ffff888011e220c8 R08: 0000000000000000 R09: ffff888011e22217 [ 76.432767][ T3003] R10: ffffed10023c4442 R11: 1ffffffff1d39cbc R12: 0000000000000000 [ 76.441130][ T3003] R13: ffff888011e220d8 R14: ffff888011e22010 R15: dead000000000100 [ 76.453234][ T3003] FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 76.462380][ T3003] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.469075][ T3003] CR2: 00007ffed348d5b7 CR3: 0000000020f5f000 CR4: 00000000001506f0 [ 76.477197][ T3003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.485231][ T3003] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.493360][ T3003] Kernel panic - not syncing: Fatal exception [ 76.499958][ T3003] Kernel Offset: disabled [ 76.504279][ T3003] Rebooting in 86400 seconds..