program: mkdir(&(0x7f0000000400)='./my_sys\x00', 0x1ff) mount(0x0, &(0x7f0000000100)='./my_sys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./my_sys/bus/pci/devices/0000:00:01.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f0000000500)="f000", 0x2, 0x3) pwrite64(r0, &(0x7f0000000600)="0200d0e37237ea8388bfb8958ce2df7b22f3860784c30248ed39490dfe8037f6cb012c19e5f66193b7492fb9f8e66c469b9f96b242d5344e44ca9245b0a0fcf8ae83f291f080290ce9952b0112485d0761ec21cb22aeab9032f383fd15d09dd079ccea656c6fe70fc86d3b030f355b9284d62aa5af173e266bfd1020b1b3c3e074", 0x81, 0x8) r1 = openat(0xffffffffffffff9c, &(0x7f0000000700)='./my_sys/bus/pci/devices/0000:00:01.0/remove\x00', 0x1, 0x0) write(r1, &(0x7f0000000800)='1', 0x1) r2 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./my_sys/bus/pci/rescan\x00', 0x1, 0x0) write(r2, &(0x7f0000000a00)='1', 0x1) syz_mount_image$f2fs(&(0x7f0000000040), &(0x7f0000000080)='./file0\x00', 0x42, &(0x7f00000000c0)=ANY=[@ANYBLOB="6673796e635f6d6f64653d706f7369782c6e6f696e6c4c6e655f646174612c6469736361726400aa19fd46b492dc6cf59d696e6c696e655f64656e7472792c00"], 0x1, 0x550e, &(0x7f0000005980)="$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[ 93.470501][ T4636] Bluetooth: hci0: command tx timeout [ 93.668989][ T5311] Console: switching to colour dummy device 80x25 [ 93.827039][ T5311] ============================================================================= [ 93.827510][ T5311] [ 93.827516][ T5311] ====================================================== [ 93.827522][ T5311] WARNING: possible circular locking dependency detected [ 93.827526][ T5311] syzkaller #0 Not tainted [ 93.827531][ T5311] ------------------------------------------------------ [ 93.827536][ T5311] syz.0.0/5311 is trying to acquire lock: [ 93.827541][ T5311] ffffffff8eb4bf40 (console_owner){....}-{0:0}, at: console_flush_all+0x123/0xaf0 [ 93.827628][ T5311] [ 93.827628][ T5311] but task is already holding lock: [ 93.827632][ T5311] ffff88801af69d98 (&n->list_lock){-.-.}-{3:3}, at: __kmem_cache_shutdown+0x111/0x2a0 [ 93.827657][ T5311] [ 93.827657][ T5311] which lock already depends on the new lock. [ 93.827657][ T5311] [ 93.827661][ T5311] [ 93.827661][ T5311] the existing dependency chain (in reverse order) is: [ 93.827666][ T5311] [ 93.827666][ T5311] -> #4 (&n->list_lock){-.-.}-{3:3}: [ 93.827680][ T5311] _raw_spin_lock_irqsave+0x40/0x60 [ 93.827728][ T5311] get_from_partial_node+0x54/0x4c0 [ 93.827743][ T5311] ___slab_alloc+0x258/0x950 [ 93.827755][ T5311] kmem_cache_alloc_noprof+0x135/0x5f0 [ 93.827769][ T5311] fill_pool+0x165/0x610 [ 93.827815][ T5311] debug_object_activate+0x38d/0x420 [ 93.827826][ T5311] insert_work+0x35/0x330 [ 93.827837][ T5311] __queue_work+0xcd8/0x10a0 [ 93.827849][ T5311] queue_work_on+0x106/0x1d0 [ 93.827860][ T5311] call_usermodehelper_exec+0x28e/0x4b0 [ 93.827871][ T5311] kobject_uevent_env+0x685/0x9e0 [ 93.827881][ T5311] device_add+0x544/0xb80 [ 93.827896][ T5311] device_create+0x269/0x300 [ 93.827910][ T5311] msr_device_create+0x33/0x50 [ 93.827921][ T5311] cpuhp_invoke_callback+0x434/0x810 [ 93.827933][ T5311] cpuhp_thread_fun+0x362/0x780 [ 93.827946][ T5311] smpboot_thread_fn+0x57c/0xa80 [ 93.827958][ T5311] kthread+0x388/0x470 [ 93.827971][ T5311] ret_from_fork+0x514/0xb70 [ 93.827985][ T5311] ret_from_fork_asm+0x1a/0x30 [ 93.827999][ T5311] [ 93.827999][ T5311] -> #3 (&pool->lock){-.-.}-{2:2}: [ 93.828015][ T5311] _raw_spin_lock+0x2e/0x40 [ 93.828025][ T5311] __queue_work+0x72f/0x10a0 [ 93.828036][ T5311] queue_work_on+0x106/0x1d0 [ 93.828045][ T5311] rpm_suspend+0xeca/0x17b0 [ 93.828060][ T5311] __pm_runtime_idle+0x12f/0x1a0 [ 93.828081][ T5311] __device_attach+0x355/0x450 [ 93.828097][ T5311] device_initial_probe+0xa1/0xd0 [ 93.828106][ T5311] bus_probe_device+0x12a/0x220 [ 93.828118][ T5311] device_add+0x7d7/0xb80 [ 93.828132][ T5311] serial_base_port_add+0x18f/0x270 [ 93.828143][ T5311] serial_core_register_port+0x37f/0x2840 [ 93.828157][ T5311] serial8250_register_8250_port+0x16b4/0x2090 [ 93.828170][ T5311] serial_pnp_probe+0x56a/0x7f0 [ 93.828182][ T5311] pnp_device_probe+0x30b/0x4c0 [ 93.828193][ T5311] really_probe+0x254/0xae0 [ 93.828203][ T5311] __driver_probe_device+0x1e8/0x360 [ 93.828212][ T5311] driver_probe_device+0x4f/0x240 [ 93.828222][ T5311] __driver_attach+0x339/0x600 [ 93.828230][ T5311] bus_for_each_dev+0x23b/0x2c0 [ 93.828242][ T5311] bus_add_driver+0x345/0x670 [ 93.828254][ T5311] driver_register+0x23a/0x320 [ 93.828264][ T5311] serial8250_init+0x8f/0x160 [ 93.828346][ T5311] do_one_initcall+0x250/0x870 [ 93.828361][ T5311] do_initcall_level+0x10a/0x1a0 [ 93.828377][ T5311] do_initcalls+0x59/0xa0 [ 93.828392][ T5311] kernel_init_freeable+0x29d/0x3e0 [ 93.828407][ T5311] kernel_init+0x1d/0x1d0 [ 93.828423][ T5311] ret_from_fork+0x514/0xb70 [ 93.828435][ T5311] ret_from_fork_asm+0x1a/0x30 [ 93.828449][ T5311] [ 93.828449][ T5311] -> #2 (&dev->power.lock){-...}-{3:3}: [ 93.828465][ T5311] _raw_spin_lock_irqsave+0x40/0x60 [ 93.828476][ T5311] __pm_runtime_resume+0x10f/0x180 [ 93.828491][ T5311] __uart_start+0x171/0x460 [ 93.828503][ T5311] uart_write+0x251/0x9f0 [ 93.828516][ T5311] n_tty_write+0xd49/0x11e0 [ 93.828525][ T5311] file_tty_write+0x509/0x9c0 [ 93.828537][ T5311] vfs_write+0x612/0xba0 [ 93.828549][ T5311] ksys_write+0x150/0x270 [ 93.828561][ T5311] do_syscall_64+0x174/0x580 [ 93.828572][ T5311] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.828580][ T5311] [ 93.828580][ T5311] -> #1 (&port_lock_key){-...}-{3:3}: [ 93.828594][ T5311] _raw_spin_lock_irqsave+0x40/0x60 [ 93.828603][ T5311] serial8250_console_write+0x153/0x1ba0 [ 93.828616][ T5311] console_flush_all+0x6ea/0xaf0 [ 93.828625][ T5311] console_unlock+0xd1/0x1c0 [ 93.828640][ T5311] vprintk_emit+0x485/0x560 [ 93.828655][ T5311] _printk+0xdd/0x130 [ 93.828664][ T5311] register_console+0xbc3/0xfc0 [ 93.828674][ T5311] univ8250_console_init+0x3a/0x70 [ 93.828687][ T5311] console_init+0x10b/0x4a0 [ 93.828698][ T5311] start_kernel+0x238/0x3e0 [ 93.828711][ T5311] x86_64_start_reservations+0x24/0x30 [ 93.828722][ T5311] x86_64_start_kernel+0x137/0x1b0 [ 93.828732][ T5311] common_startup_64+0x13e/0x157 [ 93.828741][ T5311] [ 93.828741][ T5311] -> #0 (console_owner){....}-{0:0}: [ 93.828755][ T5311] __lock_acquire+0x1520/0x2cf0 [ 93.828768][ T5311] lock_acquire+0x106/0x350 [ 93.828779][ T5311] console_flush_all+0x693/0xaf0 [ 93.828789][ T5311] console_unlock+0xd1/0x1c0 [ 93.828800][ T5311] vprintk_emit+0x485/0x560 [ 93.828812][ T5311] _printk+0xdd/0x130 [ 93.828819][ T5311] __slab_bug+0x6e/0xd0 [ 93.828828][ T5311] slab_bug+0x57/0x80 [ 93.828838][ T5311] list_slab_objects+0x35/0x1a0 [ 93.828848][ T5311] __kmem_cache_shutdown+0x1a5/0x2a0 [ 93.828858][ T5311] kmem_cache_destroy+0x98/0x180 [ 93.828873][ T5311] virtio_gpu_free_vbufs+0x40/0x70 [ 93.828884][ T5311] virtio_gpu_release+0x55/0x140 [ 93.828892][ T5311] drm_dev_put+0xa9/0x120 [ 93.828902][ T5311] virtio_dev_remove+0x9c/0x1b0 [ 93.828912][ T5311] device_release_driver_internal+0x48b/0x880 [ 93.828921][ T5311] bus_remove_device+0x444/0x560 [ 93.828933][ T5311] device_del+0x524/0x8f0 [ 93.828945][ T5311] device_unregister+0x21/0xf0 [ 93.828959][ T5311] unregister_virtio_device+0x37/0x60 [ 93.828968][ T5311] virtio_pci_remove+0x7f/0xf0 [ 93.828980][ T5311] pci_device_remove+0x99/0x1c0 [ 93.828990][ T5311] device_release_driver_internal+0x48b/0x880 [ 93.828998][ T5311] pci_stop_bus_device+0xf6/0x120 [ 93.829011][ T5311] pci_stop_and_remove_bus_device_locked+0x77/0xb0 [ 93.829025][ T5311] remove_store+0xe5/0x150 [ 93.829039][ T5311] kernfs_fop_write_iter+0x3a4/0x540 [ 93.829052][ T5311] vfs_write+0x612/0xba0 [ 93.829063][ T5311] ksys_write+0x150/0x270 [ 93.829082][ T5311] do_syscall_64+0x174/0x580 [ 93.829096][ T5311] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.829106][ T5311] [ 93.829106][ T5311] other info that might help us debug this: [ 93.829106][ T5311] [ 93.829110][ T5311] Chain exists of: [ 93.829110][ T5311] console_owner --> &pool->lock --> &n->list_lock [ 93.829110][ T5311] [ 93.829130][ T5311] Possible unsafe locking scenario: [ 93.829130][ T5311] [ 93.829133][ T5311] CPU0 CPU1 [ 93.829138][ T5311] ---- ---- [ 93.829141][ T5311] lock(&n->list_lock); [ 93.829149][ T5311] lock(&pool->lock); [ 93.829157][ T5311] lock(&n->list_lock); [ 93.829165][ T5311] lock(console_owner); [ 93.829173][ T5311] [ 93.829173][ T5311] *** DEADLOCK *** [ 93.829173][ T5311] [ 93.829176][ T5311] 11 locks held by syz.0.0/5311: [ 93.829183][ T5311] #0: ffff888000bff0f0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320 [ 93.829212][ T5311] #1: ffff88801fa76450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0 [ 93.829242][ T5311] #2: ffff88801f4f1c80 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540 [ 93.829270][ T5311] #3: ffffffff8f39ac60 (pci_rescan_remove_lock){+.+.}-{4:4}, at: pci_stop_and_remove_bus_device_locked+0x13/0xb0 [ 93.829298][ T5311] #4: ffff88801f85a1f8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb9/0x880 [ 93.829321][ T5311] #5: ffff8880331761b0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb9/0x880 [ 93.829344][ T5311] #6: ffffffff8e9e75f0 (cpu_hotplug_lock){++++}-{0:0}, at: kmem_cache_destroy+0x60/0x180 [ 93.829372][ T5311] #7: ffffffff8ec69f88 (slab_mutex){+.+.}-{4:4}, at: kmem_cache_destroy+0x6e/0x180 [ 93.829400][ T5311] #8: ffff88801af69d98 (&n->list_lock){-.-.}-{3:3}, at: __kmem_cache_shutdown+0x111/0x2a0 [ 93.829428][ T5311] #9: ffffffff8eb4bfa0 (console_lock){+.+.}-{0:0}, at: _printk+0xdd/0x130 [ 93.829454][ T5311] #10: ffffffff8ea33838 (console_srcu){....}-{0:0}, at: console_flush_all+0x123/0xaf0 [ 93.829479][ T5311] [ 93.829479][ T5311] stack backtrace: [ 93.829486][ T5311] CPU: 0 UID: 0 PID: 5311 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 93.829499][ T5311] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 93.829506][ T5311] Call Trace: [ 93.829511][ T5311] [ 93.829516][ T5311] dump_stack_lvl+0xe8/0x150 [ 93.829534][ T5311] print_circular_bug+0x2e1/0x300 [ 93.829552][ T5311] check_noncircular+0x12e/0x150 [ 93.829570][ T5311] __lock_acquire+0x1520/0x2cf0 [ 93.829587][ T5311] ? console_flush_all+0x123/0xaf0 [ 93.829597][ T5311] lock_acquire+0x106/0x350 [ 93.829608][ T5311] ? console_flush_all+0x123/0xaf0 [ 93.829621][ T5311] ? do_raw_spin_unlock+0x4d/0x210 [ 93.829632][ T5311] ? console_flush_all+0x123/0xaf0 [ 93.829642][ T5311] console_flush_all+0x693/0xaf0 [ 93.829653][ T5311] ? console_flush_all+0x123/0xaf0 [ 93.829664][ T5311] ? console_flush_all+0x123/0xaf0 [ 93.829676][ T5311] ? __pfx_console_flush_all+0x10/0x10 [ 93.829687][ T5311] ? is_printk_cpu_sync_owner+0x32/0x40 [ 93.829701][ T5311] console_unlock+0xd1/0x1c0 [ 93.829717][ T5311] ? __pfx_console_unlock+0x10/0x10 [ 93.829731][ T5311] ? _raw_spin_unlock+0x40/0x50 [ 93.829742][ T5311] ? _printk+0xdd/0x130 [ 93.829753][ T5311] vprintk_emit+0x485/0x560 [ 93.829770][ T5311] ? __pfx_vprintk_emit+0x10/0x10 [ 93.829786][ T5311] _printk+0xdd/0x130 [ 93.829796][ T5311] ? __lock_acquire+0x683/0x2cf0 [ 93.829808][ T5311] ? __pfx__printk+0x10/0x10 [ 93.829819][ T5311] ? do_raw_spin_lock+0x12b/0x2f0 [ 93.829831][ T5311] __slab_bug+0x6e/0xd0 [ 93.829844][ T5311] slab_bug+0x57/0x80 [ 93.829857][ T5311] list_slab_objects+0x35/0x1a0 [ 93.829871][ T5311] __kmem_cache_shutdown+0x1a5/0x2a0 [ 93.829885][ T5311] ? virtio_gpu_free_vbufs+0x40/0x70 [ 93.829898][ T5311] kmem_cache_destroy+0x98/0x180 [ 93.829914][ T5311] virtio_gpu_free_vbufs+0x40/0x70 [ 93.829926][ T5311] ? __pfx_virtio_gpu_release+0x10/0x10 [ 93.829936][ T5311] virtio_gpu_release+0x55/0x140 [ 93.829946][ T5311] ? __pfx_virtio_gpu_release+0x10/0x10 [ 93.829956][ T5311] drm_dev_put+0xa9/0x120 [ 93.829968][ T5311] virtio_dev_remove+0x9c/0x1b0 [ 93.830021][ T5311] ? __pfx_virtio_dev_remove+0x10/0x10 [ 93.830032][ T5311] device_release_driver_internal+0x48b/0x880 [ 93.830046][ T5311] bus_remove_device+0x444/0x560 [ 93.830062][ T5311] ? __pfx_bus_remove_device+0x10/0x10 [ 93.830084][ T5311] ? kernfs_remove_by_name_ns+0x101/0x140 [ 93.830102][ T5311] device_del+0x524/0x8f0 [ 93.830119][ T5311] ? __pfx_device_del+0x10/0x10 [ 93.830138][ T5311] device_unregister+0x21/0xf0 [ 93.830154][ T5311] unregister_virtio_device+0x37/0x60 [ 93.830166][ T5311] virtio_pci_remove+0x7f/0xf0 [ 93.830181][ T5311] pci_device_remove+0x99/0x1c0 [ 93.830193][ T5311] ? __pfx_pci_device_remove+0x10/0x10 [ 93.830204][ T5311] device_release_driver_internal+0x48b/0x880 [ 93.830217][ T5311] pci_stop_bus_device+0xf6/0x120 [ 93.830232][ T5311] pci_stop_and_remove_bus_device_locked+0x77/0xb0 [ 93.830247][ T5311] remove_store+0xe5/0x150 [ 93.830263][ T5311] ? __pfx_remove_store+0x10/0x10 [ 93.830279][ T5311] ? sysfs_file_kobj+0x1e4/0x230 [ 93.830289][ T5311] ? sysfs_kf_write+0x166/0x260 [ 93.830302][ T5311] ? __pfx_sysfs_kf_write+0x10/0x10 [ 93.830312][ T5311] kernfs_fop_write_iter+0x3a4/0x540 [ 93.830330][ T5311] vfs_write+0x612/0xba0 [ 93.830345][ T5311] ? __pfx_vfs_write+0x10/0x10 [ 93.830361][ T5311] ? __fget_files+0x2a/0x420 [ 93.830402][ T5311] ksys_write+0x150/0x270 [ 93.830420][ T5311] ? __pfx_ksys_write+0x10/0x10 [ 93.830436][ T5311] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.830454][ T5311] do_syscall_64+0x174/0x580 [ 93.830467][ T5311] ? trace_irq_disable+0x3b/0x140 [ 93.830481][ T5311] ? clear_bhb_loop+0x70/0xc0 [ 93.830494][ T5311] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.830505][ T5311] RIP: 0033:0x7fe316b9e0d9 [ 93.830516][ T5311] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 [ 93.830526][ T5311] RSP: 002b:00007fe312ff4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 93.830538][ T5311] RAX: ffffffffffffffda RBX: 00007fe316e25fa0 RCX: 00007fe316b9e0d9 [ 93.830546][ T5311] RDX: 0000000000000001 RSI: 0000200000000800 RDI: 0000000000000004 [ 93.830554][ T5311] RBP: 00007fe316c35024 R08: 0000000000000000 R09: 0000000000000000 [ 93.830562][ T5311] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 93.830569][ T5311] R13: 00007fe316e26038 R14: 00007fe316e25fa0 R15: 00007fff422dd578 [ 93.830579][ T5311] [ 94.357982][ T5311] BUG virtio-gpu-vbufs (Not tainted): Objects remaining on __kmem_cache_shutdown() [ 94.361479][ T5311] ----------------------------------------------------------------------------- [ 94.361479][ T5311] [ 94.366023][ T5311] Object 0xffff888012b51348 @offset=840 [ 94.368273][ T5311] Object 0xffff888012b51460 @offset=1120 [ 94.370633][ T5311] Slab 0xffffea00004ad440 objects=14 used=2 fp=0xffff888012b51118 flags=0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) [ 94.376007][ T5311] ------------[ cut here ]------------ [ 94.378096][ T5311] 1 [ 94.378103][ T5311] WARNING: mm/slub.c:1244 at __slab_err+0x15/0x20, CPU#0: syz.0.0/5311 [ 94.382112][ T5311] Modules linked in: [ 94.383578][ T5311] CPU: 0 UID: 0 PID: 5311 Comm: syz.0.0 Tainted: G B syzkaller #0 PREEMPT(full) [ 94.387512][ T5311] Tainted: [B]=BAD_PAGE [ 94.388892][ T5311] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 94.392545][ T5311] RIP: 0010:__slab_err+0x15/0x20 [ 94.394419][ T5311] Code: 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e8 2b 00 00 00 bf 05 00 00 00 be 01 00 00 00 e8 fc a7 5e 00 90 <0f> 0b 90 c3 cc cc cc cc cc 66 90 90 90 90 90 90 90 90 90 90 90 90 [ 94.402393][ T5311] RSP: 0000:ffffc9000de7f6d8 EFLAGS: 00010083 [ 94.404962][ T5311] RAX: ffffffff8186dc3a RBX: ffff888034ca2c80 RCX: 0000000000100000 [ 94.408269][ T5311] RDX: ffffc9000eb82000 RSI: 0000000000067f74 RDI: 0000000000067f75 [ 94.411571][ T5311] RBP: ffffea0000480710 R08: ffffffff9373f0c7 R09: 1ffffffff26e7e18 [ 94.414968][ T5311] R10: dffffc0000000000 R11: fffffbfff26e7e19 R12: ffffea00007e70d0 [ 94.418178][ T5311] R13: ffffea00004ad440 R14: ffffc9000de7f6f0 R15: ffff88801af69d80 [ 94.421169][ T5311] FS: 00007fe312ff56c0(0000) GS:ffff88808c549000(0000) knlGS:0000000000000000 [ 94.424271][ T5311] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.426613][ T5311] CR2: 00007fe30b473000 CR3: 000000004342f000 CR4: 0000000000352ef0 [ 94.429535][ T5311] Call Trace: [ 94.430817][ T5311] [ 94.431932][ T5311] __kmem_cache_shutdown+0x1a5/0x2a0 [ 94.434145][ T5311] ? virtio_gpu_free_vbufs+0x40/0x70 [ 94.436341][ T5311] kmem_cache_destroy+0x98/0x180 [ 94.438429][ T5311] virtio_gpu_free_vbufs+0x40/0x70 [ 94.440323][ T5311] ? __pfx_virtio_gpu_release+0x10/0x10 [ 94.442578][ T5311] virtio_gpu_release+0x55/0x140 [ 94.444673][ T5311] ? __pfx_virtio_gpu_release+0x10/0x10 [ 94.446795][ T5311] drm_dev_put+0xa9/0x120 [ 94.448447][ T5311] virtio_dev_remove+0x9c/0x1b0 [ 94.450429][ T5311] ? __pfx_virtio_dev_remove+0x10/0x10 [ 94.452682][ T5311] device_release_driver_internal+0x48b/0x880 [ 94.454897][ T5311] bus_remove_device+0x444/0x560 [ 94.456881][ T5311] ? __pfx_bus_remove_device+0x10/0x10 [ 94.459219][ T5311] ? kernfs_remove_by_name_ns+0x101/0x140 [ 94.461828][ T5311] device_del+0x524/0x8f0 [ 94.464064][ T5311] ? __pfx_device_del+0x10/0x10 [ 94.466184][ T5311] device_unregister+0x21/0xf0 [ 94.468361][ T5311] unregister_virtio_device+0x37/0x60 [ 94.470647][ T5311] virtio_pci_remove+0x7f/0xf0 [ 94.472724][ T5311] pci_device_remove+0x99/0x1c0 [ 94.474897][ T5311] ? __pfx_pci_device_remove+0x10/0x10 [ 94.477051][ T5311] device_release_driver_internal+0x48b/0x880 [ 94.479596][ T5311] pci_stop_bus_device+0xf6/0x120 [ 94.481610][ T5311] pci_stop_and_remove_bus_device_locked+0x77/0xb0 [ 94.484313][ T5311] remove_store+0xe5/0x150 [ 94.486172][ T5311] ? __pfx_remove_store+0x10/0x10 [ 94.488385][ T5311] ? sysfs_file_kobj+0x1e4/0x230 [ 94.490483][ T5311] ? sysfs_kf_write+0x166/0x260 [ 94.492544][ T5311] ? __pfx_sysfs_kf_write+0x10/0x10 [ 94.494661][ T5311] kernfs_fop_write_iter+0x3a4/0x540 [ 94.496759][ T5311] vfs_write+0x612/0xba0 [ 94.498577][ T5311] ? __pfx_vfs_write+0x10/0x10 [ 94.500586][ T5311] ? __fget_files+0x2a/0x420 [ 94.502529][ T5311] ksys_write+0x150/0x270 [ 94.504337][ T5311] ? __pfx_ksys_write+0x10/0x10 [ 94.506510][ T5311] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.509022][ T5311] do_syscall_64+0x174/0x580 [ 94.511001][ T5311] ? trace_irq_disable+0x3b/0x140 [ 94.513051][ T5311] ? clear_bhb_loop+0x70/0xc0 [ 94.515156][ T5311] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.517160][ T5311] RIP: 0033:0x7fe316b9e0d9 [ 94.518733][ T5311] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 [ 94.526666][ T5311] RSP: 002b:00007fe312ff4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 94.529949][ T5311] RAX: ffffffffffffffda RBX: 00007fe316e25fa0 RCX: 00007fe316b9e0d9 [ 94.532895][ T5311] RDX: 0000000000000001 RSI: 0000200000000800 RDI: 0000000000000004 [ 94.535962][ T5311] RBP: 00007fe316c35024 R08: 0000000000000000 R09: 0000000000000000 [ 94.538916][ T5311] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 94.541825][ T5311] R13: 00007fe316e26038 R14: 00007fe316e25fa0 R15: 00007fff422dd578 [ 94.544789][ T5311] [ 94.545910][ T5311] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 94.548663][ T5311] CPU: 0 UID: 0 PID: 5311 Comm: syz.0.0 Tainted: G B syzkaller #0 PREEMPT(full) [ 94.552657][ T5311] Tainted: [B]=BAD_PAGE [ 94.554394][ T5311] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 94.558554][ T5311] Call Trace: [ 94.560120][ T5311] [ 94.561499][ T5311] vpanic+0x56c/0xa60 [ 94.563318][ T5311] ? __pfx__printk+0x10/0x10 [ 94.565311][ T5311] ? __pfx_vpanic+0x10/0x10 [ 94.567261][ T5311] ? is_bpf_text_address+0x292/0x2b0 [ 94.569389][ T5311] ? is_bpf_text_address+0x26/0x2b0 [ 94.571571][ T5311] panic+0xc5/0xd0 [ 94.573081][ T5311] ? __pfx_panic+0x10/0x10 [ 94.574972][ T5311] __warn+0x315/0x4c0 [ 94.576639][ T5311] ? __slab_err+0x15/0x20 [ 94.578243][ T5311] ? __slab_err+0x15/0x20 [ 94.580026][ T5311] __report_bug+0x276/0x570 [ 94.581812][ T5311] ? do_raw_spin_unlock+0x4d/0x210 [ 94.583821][ T5311] ? __slab_err+0x15/0x20 [ 94.585613][ T5311] ? __pfx___report_bug+0x10/0x10 [ 94.587747][ T5311] ? __wake_up_klogd+0xe6/0x120 [ 94.589818][ T5311] ? vprintk_emit+0x4eb/0x560 [ 94.591885][ T5311] ? __pfx_vprintk_emit+0x10/0x10 [ 94.594009][ T5311] ? _printk+0xdd/0x130 [ 94.595822][ T5311] ? __slab_err+0x15/0x20 [ 94.597627][ T5311] report_bug+0x16a/0x220 [ 94.599437][ T5311] ? __slab_err+0x15/0x20 [ 94.601253][ T5311] ? __slab_err+0x17/0x20 [ 94.603199][ T5311] handle_bug+0x9c/0x200 [ 94.605210][ T5311] exc_invalid_op+0x1a/0x50 [ 94.607399][ T5311] asm_exc_invalid_op+0x1a/0x20 [ 94.609753][ T5311] RIP: 0010:__slab_err+0x15/0x20 [ 94.611903][ T5311] Code: 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e8 2b 00 00 00 bf 05 00 00 00 be 01 00 00 00 e8 fc a7 5e 00 90 <0f> 0b 90 c3 cc cc cc cc cc 66 90 90 90 90 90 90 90 90 90 90 90 90 [ 94.619840][ T5311] RSP: 0000:ffffc9000de7f6d8 EFLAGS: 00010083 [ 94.622448][ T5311] RAX: ffffffff8186dc3a RBX: ffff888034ca2c80 RCX: 0000000000100000 [ 94.625840][ T5311] RDX: ffffc9000eb82000 RSI: 0000000000067f74 RDI: 0000000000067f75 [ 94.629645][ T5311] RBP: ffffea0000480710 R08: ffffffff9373f0c7 R09: 1ffffffff26e7e18 [ 94.633252][ T5311] R10: dffffc0000000000 R11: fffffbfff26e7e19 R12: ffffea00007e70d0 [ 94.636604][ T5311] R13: ffffea00004ad440 R14: ffffc9000de7f6f0 R15: ffff88801af69d80 [ 94.639903][ T5311] ? add_taint+0x9a/0xe0 [ 94.641713][ T5311] ? __slab_err+0x14/0x20 [ 94.643583][ T5311] __kmem_cache_shutdown+0x1a5/0x2a0 [ 94.645936][ T5311] ? virtio_gpu_free_vbufs+0x40/0x70 [ 94.648485][ T5311] kmem_cache_destroy+0x98/0x180 [ 94.650925][ T5311] virtio_gpu_free_vbufs+0x40/0x70 [ 94.653215][ T5311] ? __pfx_virtio_gpu_release+0x10/0x10 [ 94.655560][ T5311] virtio_gpu_release+0x55/0x140 [ 94.657640][ T5311] ? __pfx_virtio_gpu_release+0x10/0x10 [ 94.659953][ T5311] drm_dev_put+0xa9/0x120 [ 94.661774][ T5311] virtio_dev_remove+0x9c/0x1b0 [ 94.663834][ T5311] ? __pfx_virtio_dev_remove+0x10/0x10 [ 94.666257][ T5311] device_release_driver_internal+0x48b/0x880 [ 94.669021][ T5311] bus_remove_device+0x444/0x560 [ 94.671371][ T5311] ? __pfx_bus_remove_device+0x10/0x10 [ 94.674157][ T5311] ? kernfs_remove_by_name_ns+0x101/0x140 [ 94.677259][ T5311] device_del+0x524/0x8f0 [ 94.679578][ T5311] ? __pfx_device_del+0x10/0x10 [ 94.681666][ T5311] device_unregister+0x21/0xf0 [ 94.683802][ T5311] unregister_virtio_device+0x37/0x60 [ 94.686186][ T5311] virtio_pci_remove+0x7f/0xf0 [ 94.688195][ T5311] pci_device_remove+0x99/0x1c0 [ 94.690242][ T5311] ? __pfx_pci_device_remove+0x10/0x10 [ 94.692569][ T5311] device_release_driver_internal+0x48b/0x880 [ 94.695267][ T5311] pci_stop_bus_device+0xf6/0x120 [ 94.697365][ T5311] pci_stop_and_remove_bus_device_locked+0x77/0xb0 [ 94.700129][ T5311] remove_store+0xe5/0x150 [ 94.701973][ T5311] ? __pfx_remove_store+0x10/0x10 [ 94.704158][ T5311] ? sysfs_file_kobj+0x1e4/0x230 [ 94.706272][ T5311] ? sysfs_kf_write+0x166/0x260 [ 94.708431][ T5311] ? __pfx_sysfs_kf_write+0x10/0x10 [ 94.710694][ T5311] kernfs_fop_write_iter+0x3a4/0x540 [ 94.712893][ T5311] vfs_write+0x612/0xba0 [ 94.714740][ T5311] ? __pfx_vfs_write+0x10/0x10 [ 94.716734][ T5311] ? __fget_files+0x2a/0x420 [ 94.718782][ T5311] ksys_write+0x150/0x270 [ 94.720701][ T5311] ? __pfx_ksys_write+0x10/0x10 [ 94.722776][ T5311] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.725309][ T5311] do_syscall_64+0x174/0x580 [ 94.727323][ T5311] ? trace_irq_disable+0x3b/0x140 [ 94.729453][ T5311] ? clear_bhb_loop+0x70/0xc0 [ 94.731505][ T5311] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.734092][ T5311] RIP: 0033:0x7fe316b9e0d9 [ 94.735999][ T5311] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 [ 94.743986][ T5311] RSP: 002b:00007fe312ff4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 94.747666][ T5311] RAX: ffffffffffffffda RBX: 00007fe316e25fa0 RCX: 00007fe316b9e0d9 [ 94.751088][ T5311] RDX: 0000000000000001 RSI: 0000200000000800 RDI: 0000000000000004 [ 94.754440][ T5311] RBP: 00007fe316c35024 R08: 0000000000000000 R09: 0000000000000000 [ 94.757827][ T5311] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 94.761265][ T5311] R13: 00007fe316e26038 R14: 00007fe316e25fa0 R15: 00007fff422dd578 [ 94.764744][ T5311] [ 94.766554][ T5311] Kernel Offset: disabled [ 94.768465][ T5311] Rebooting in 86400 seconds..