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) syz_emit_ethernet(0x3b6, &(0x7f0000000200)={@local, @dev={'\xaa\xaa\xaa\xaa\xaa', 0x22}, @void, {@ipv6={0x86dd, @icmpv6={0x0, 0x6, "cabf00", 0x380, 0x3a, 0xff, @remote, @mcast2, {[], @ndisc_ra={0x86, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, [{0x0, 0xa, "a78ce54006598080a8030037004023493b87aafaffffffffffffff23732472eefa45ad96579269748e254c1e4a8a8b3f0ab0c430d3be27df3e34066d42ca0a5c15b37adac15084dbaf736b41e5af2502"}, {0x0, 0x1, "000000050000000026000400"}, {0x0, 0x18, "fe906d26efe39393fe08f73eabc5977b1190a3a6ad8338f1511cdd10c35d8f6de79fc7fd175f75649fa368a32c829af02d7f44d92324a7051e460a13ddde25a5b85b9d930914625d8a049b4cf0d129806a610ad8477a2499a9a0527f75b655a6653d0363a979acf93f88eea07d68423e90280409de1657275f716a2bf2915d1783e8eb477b0d1170f0ecbdef4c23e1b76e9ab3d2fbe4b34438d2a77577edd0ebed9682b851b380ae0cab282af9d7ebe668177704c5fd4698c934de4731f3f61effc978"}, {0x0, 0x1d, "06aa85616177c41bc943afcb84619755403946b0730a18d5c38cf7dcad830f2dc8674b87ba8b58f81ece27975cc39e595e9af90b4fe92a38d25551c2d9ebfc5dfc5a2a501b7e483de3f808895c5f4a1a2367bc591dd8b094822ff0dea07c9a1f643c822a18b79f7c5eba31fb68b2d734a6671e27182aee96f24a4a5cf390dab23b500b0c0272479611e4f7f4299ec4d926d443367b105185e6ecd9602ba95392343e9bbd047ef6bc1ba42399907ccd0a562db212baa39eb8164e240069f656d3a05fecf894222a141123f5ac010000000000000090aa235a670670ffc5dc49dfb58d00000000000000"}, {0x4, 0xb, "17dcea46805d4809c20547406b18901b0aeff04c0300f3c75dc2d227a83b89483be298af1084743475671545e65eb2e9ac946a3f0e2bc4619f91394c02bcfbbb7d71138537d68e2d2c6393a9f3becd1a9f51a948b5b303"}, {0x21, 0x7, "b8a3e100908f61640000000200fe80ffff00000000000000ff0bc0fe00000000008879e66485201a0015ca83747357a027450004000000"}, {0x0, 0x14, "5e14f0e74d2d42cfb3f27fafb60845f90b6dfc2e37bc87c6905bbc94d33e1ea71a28105f543e868a8a53b360a9d33e2b1e26eb1d18065daa7628cf9ef083611c9f6ae2e1eb3d8bf9c6ab2642c4808288e62afbf03269f1f98aea6ab3beb5fdc5fdaabc2c676d8800871a6aa54155dea2d995cb22c9924e0ad38c6967052cc7786d779b8353aac33a57d79b05613a12328f61129017fb632dbf04542188b196e213408c"}, {0x0, 0x5, "d5170000dce9674a36da018dff16e70b8b14c4b7a94fe18e88605aa6be1a02a326a6bce65f81ed"}]}}}}}}, 0x0) 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="6673796e635f6d6f64653d706f7369782c6e6f696e6c696e655f646174612c6469736361726400aa19fd46b492dc6cf59d696e6c696e655f64656e7472792c00"], 0x1, 0x550e, 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[ 86.788010][ T4636] Bluetooth: hci0: command tx timeout [ 86.893307][ T5307] Console: switching to colour dummy device 80x25 [ 87.037032][ T5307] ============================================================================= [ 87.037611][ T5307] [ 87.037616][ T5307] ====================================================== [ 87.037619][ T5307] WARNING: possible circular locking dependency detected [ 87.037623][ T5307] syzkaller #0 Not tainted [ 87.037627][ T5307] ------------------------------------------------------ [ 87.037629][ T5307] syz.0.0/5307 is trying to acquire lock: [ 87.037633][ T5307] ffffffff8eb4bf40 (console_owner){....}-{0:0}, at: console_flush_all+0x123/0xaf0 [ 87.037701][ T5307] [ 87.037701][ T5307] but task is already holding lock: [ 87.037704][ T5307] ffff888032ccad98 (&n->list_lock){-.-.}-{3:3}, at: __kmem_cache_shutdown+0x111/0x2a0 [ 87.037723][ T5307] [ 87.037723][ T5307] which lock already depends on the new lock. [ 87.037723][ T5307] [ 87.037725][ T5307] [ 87.037725][ T5307] the existing dependency chain (in reverse order) is: [ 87.037728][ T5307] [ 87.037728][ T5307] -> #4 (&n->list_lock){-.-.}-{3:3}: [ 87.037737][ T5307] _raw_spin_lock_irqsave+0x40/0x60 [ 87.037771][ T5307] get_from_partial_node+0x54/0x4c0 [ 87.037779][ T5307] ___slab_alloc+0x258/0x950 [ 87.037791][ T5307] kmem_cache_alloc_noprof+0x135/0x5f0 [ 87.037805][ T5307] fill_pool+0x165/0x610 [ 87.037846][ T5307] debug_object_activate+0x38d/0x420 [ 87.037857][ T5307] insert_work+0x35/0x330 [ 87.037867][ T5307] __queue_work+0xcd8/0x10a0 [ 87.037878][ T5307] queue_work_on+0x106/0x1d0 [ 87.037894][ T5307] pcpu_alloc_noprof+0xa92/0x1900 [ 87.037905][ T5307] iommu_dma_init_fq+0x2d3/0x700 [ 87.037917][ T5307] iommu_setup_dma_ops+0x6e5/0x1820 [ 87.037929][ T5307] bus_iommu_probe+0x296/0x470 [ 87.037942][ T5307] iommu_device_register+0x1af/0x210 [ 87.037954][ T5307] intel_iommu_init+0x6f0/0x8e0 [ 87.038024][ T5307] pci_iommu_init+0x38/0x70 [ 87.038035][ T5307] do_one_initcall+0x250/0x870 [ 87.038048][ T5307] do_initcall_level+0x10a/0x1a0 [ 87.038059][ T5307] do_initcalls+0x59/0xa0 [ 87.038070][ T5307] kernel_init_freeable+0x29d/0x3e0 [ 87.038081][ T5307] kernel_init+0x1d/0x1d0 [ 87.038095][ T5307] ret_from_fork+0x514/0xb70 [ 87.038107][ T5307] ret_from_fork_asm+0x1a/0x30 [ 87.038120][ T5307] [ 87.038120][ T5307] -> #3 (&pool->lock){-.-.}-{2:2}: [ 87.038135][ T5307] _raw_spin_lock+0x2e/0x40 [ 87.038142][ T5307] __queue_work+0x72f/0x10a0 [ 87.038150][ T5307] queue_work_on+0x106/0x1d0 [ 87.038156][ T5307] rpm_suspend+0xeca/0x17b0 [ 87.038165][ T5307] __pm_runtime_idle+0x12f/0x1a0 [ 87.038173][ T5307] __device_attach+0x355/0x450 [ 87.038182][ T5307] device_initial_probe+0xa1/0xd0 [ 87.038187][ T5307] bus_probe_device+0x12a/0x220 [ 87.038194][ T5307] device_add+0x7d7/0xb80 [ 87.038201][ T5307] serial_base_port_add+0x18f/0x270 [ 87.038209][ T5307] serial_core_register_port+0x37f/0x2840 [ 87.038217][ T5307] serial8250_register_8250_port+0x16b4/0x2090 [ 87.038224][ T5307] serial_pnp_probe+0x56a/0x7f0 [ 87.038232][ T5307] pnp_device_probe+0x30b/0x4c0 [ 87.038238][ T5307] really_probe+0x254/0xae0 [ 87.038244][ T5307] __driver_probe_device+0x1e8/0x360 [ 87.038264][ T5307] driver_probe_device+0x4f/0x240 [ 87.038270][ T5307] __driver_attach+0x339/0x600 [ 87.038275][ T5307] bus_for_each_dev+0x23b/0x2c0 [ 87.038282][ T5307] bus_add_driver+0x345/0x670 [ 87.038288][ T5307] driver_register+0x23a/0x320 [ 87.038294][ T5307] serial8250_init+0x8f/0x160 [ 87.038302][ T5307] do_one_initcall+0x250/0x870 [ 87.038309][ T5307] do_initcall_level+0x10a/0x1a0 [ 87.038319][ T5307] do_initcalls+0x59/0xa0 [ 87.038327][ T5307] kernel_init_freeable+0x29d/0x3e0 [ 87.038335][ T5307] kernel_init+0x1d/0x1d0 [ 87.038345][ T5307] ret_from_fork+0x514/0xb70 [ 87.038352][ T5307] ret_from_fork_asm+0x1a/0x30 [ 87.038362][ T5307] [ 87.038362][ T5307] -> #2 (&dev->power.lock){-...}-{3:3}: [ 87.038375][ T5307] _raw_spin_lock_irqsave+0x40/0x60 [ 87.038383][ T5307] __pm_runtime_resume+0x10f/0x180 [ 87.038396][ T5307] __uart_start+0x171/0x460 [ 87.038407][ T5307] uart_write+0x251/0x9f0 [ 87.038418][ T5307] n_tty_write+0xd49/0x11e0 [ 87.038427][ T5307] file_tty_write+0x509/0x9c0 [ 87.038437][ T5307] vfs_write+0x612/0xba0 [ 87.038449][ T5307] ksys_write+0x150/0x270 [ 87.038459][ T5307] do_syscall_64+0x174/0x580 [ 87.038470][ T5307] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.038478][ T5307] [ 87.038478][ T5307] -> #1 (&port_lock_key){-.-.}-{3:3}: [ 87.038492][ T5307] _raw_spin_lock_irqsave+0x40/0x60 [ 87.038502][ T5307] serial8250_console_write+0x153/0x1ba0 [ 87.038515][ T5307] console_flush_all+0x6ea/0xaf0 [ 87.038525][ T5307] console_unlock+0xd1/0x1c0 [ 87.038538][ T5307] vprintk_emit+0x485/0x560 [ 87.038548][ T5307] _printk+0xdd/0x130 [ 87.038555][ T5307] register_console+0xbc3/0xfc0 [ 87.038563][ T5307] univ8250_console_init+0x3a/0x70 [ 87.038575][ T5307] console_init+0x10b/0x4a0 [ 87.038585][ T5307] start_kernel+0x238/0x3e0 [ 87.038596][ T5307] x86_64_start_reservations+0x24/0x30 [ 87.038606][ T5307] x86_64_start_kernel+0x137/0x1b0 [ 87.038615][ T5307] common_startup_64+0x13e/0x157 [ 87.038624][ T5307] [ 87.038624][ T5307] -> #0 (console_owner){....}-{0:0}: [ 87.038637][ T5307] __lock_acquire+0x1520/0x2cf0 [ 87.038649][ T5307] lock_acquire+0x106/0x350 [ 87.038659][ T5307] console_flush_all+0x693/0xaf0 [ 87.038668][ T5307] console_unlock+0xd1/0x1c0 [ 87.038681][ T5307] vprintk_emit+0x485/0x560 [ 87.038694][ T5307] _printk+0xdd/0x130 [ 87.038702][ T5307] __slab_bug+0x6e/0xd0 [ 87.038711][ T5307] slab_bug+0x57/0x80 [ 87.038720][ T5307] list_slab_objects+0x35/0x1a0 [ 87.038731][ T5307] __kmem_cache_shutdown+0x1a5/0x2a0 [ 87.038742][ T5307] kmem_cache_destroy+0x98/0x180 [ 87.038755][ T5307] virtio_gpu_free_vbufs+0x40/0x70 [ 87.038767][ T5307] virtio_gpu_release+0x55/0x140 [ 87.038775][ T5307] drm_dev_put+0xa9/0x120 [ 87.038785][ T5307] virtio_dev_remove+0x9c/0x1b0 [ 87.038793][ T5307] device_release_driver_internal+0x48b/0x880 [ 87.038802][ T5307] bus_remove_device+0x444/0x560 [ 87.038813][ T5307] device_del+0x524/0x8f0 [ 87.038825][ T5307] device_unregister+0x21/0xf0 [ 87.038838][ T5307] unregister_virtio_device+0x37/0x60 [ 87.038847][ T5307] virtio_pci_remove+0x7f/0xf0 [ 87.038860][ T5307] pci_device_remove+0x99/0x1c0 [ 87.038872][ T5307] device_release_driver_internal+0x48b/0x880 [ 87.038890][ T5307] pci_stop_bus_device+0xf6/0x120 [ 87.038906][ T5307] pci_stop_and_remove_bus_device_locked+0x77/0xb0 [ 87.038918][ T5307] remove_store+0xe5/0x150 [ 87.038931][ T5307] kernfs_fop_write_iter+0x3a4/0x540 [ 87.038944][ T5307] vfs_write+0x612/0xba0 [ 87.038955][ T5307] ksys_write+0x150/0x270 [ 87.038966][ T5307] do_syscall_64+0x174/0x580 [ 87.038977][ T5307] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.038986][ T5307] [ 87.038986][ T5307] other info that might help us debug this: [ 87.038986][ T5307] [ 87.038989][ T5307] Chain exists of: [ 87.038989][ T5307] console_owner --> &pool->lock --> &n->list_lock [ 87.038989][ T5307] [ 87.039006][ T5307] Possible unsafe locking scenario: [ 87.039006][ T5307] [ 87.039009][ T5307] CPU0 CPU1 [ 87.039012][ T5307] ---- ---- [ 87.039015][ T5307] lock(&n->list_lock); [ 87.039022][ T5307] lock(&pool->lock); [ 87.039029][ T5307] lock(&n->list_lock); [ 87.039037][ T5307] lock(console_owner); [ 87.039044][ T5307] [ 87.039044][ T5307] *** DEADLOCK *** [ 87.039044][ T5307] [ 87.039047][ T5307] 11 locks held by syz.0.0/5307: [ 87.039054][ T5307] #0: ffff888012995630 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320 [ 87.039080][ T5307] #1: ffff8880346a6450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0 [ 87.039107][ T5307] #2: ffff8880355a7880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540 [ 87.039136][ T5307] #3: ffffffff8f39ac60 (pci_rescan_remove_lock){+.+.}-{4:4}, at: pci_stop_and_remove_bus_device_locked+0x13/0xb0 [ 87.039161][ T5307] #4: ffff88801d2681f8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb9/0x880 [ 87.039187][ T5307] #5: ffff88803333f1b0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb9/0x880 [ 87.039211][ T5307] #6: ffffffff8e9e75f0 (cpu_hotplug_lock){++++}-{0:0}, at: kmem_cache_destroy+0x60/0x180 [ 87.039241][ T5307] #7: ffffffff8ec69f88 (slab_mutex){+.+.}-{4:4}, at: kmem_cache_destroy+0x6e/0x180 [ 87.039274][ T5307] #8: ffff888032ccad98 (&n->list_lock){-.-.}-{3:3}, at: __kmem_cache_shutdown+0x111/0x2a0 [ 87.039301][ T5307] #9: ffffffff8eb4bfa0 (console_lock){+.+.}-{0:0}, at: _printk+0xdd/0x130 [ 87.039355][ T5307] #10: ffffffff8ea33838 (console_srcu){....}-{0:0}, at: console_flush_all+0x123/0xaf0 [ 87.039381][ T5307] [ 87.039381][ T5307] stack backtrace: [ 87.039388][ T5307] CPU: 0 UID: 0 PID: 5307 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 87.039400][ T5307] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 87.039406][ T5307] Call Trace: [ 87.039411][ T5307] [ 87.039416][ T5307] dump_stack_lvl+0xe8/0x150 [ 87.039431][ T5307] print_circular_bug+0x2e1/0x300 [ 87.039449][ T5307] check_noncircular+0x12e/0x150 [ 87.039465][ T5307] __lock_acquire+0x1520/0x2cf0 [ 87.039483][ T5307] ? console_flush_all+0x123/0xaf0 [ 87.039492][ T5307] lock_acquire+0x106/0x350 [ 87.039502][ T5307] ? console_flush_all+0x123/0xaf0 [ 87.039513][ T5307] ? do_raw_spin_unlock+0x4d/0x210 [ 87.039522][ T5307] ? console_flush_all+0x123/0xaf0 [ 87.039532][ T5307] console_flush_all+0x693/0xaf0 [ 87.039541][ T5307] ? console_flush_all+0x123/0xaf0 [ 87.039551][ T5307] ? console_flush_all+0x123/0xaf0 [ 87.039562][ T5307] ? __pfx_console_flush_all+0x10/0x10 [ 87.039573][ T5307] ? is_printk_cpu_sync_owner+0x32/0x40 [ 87.039585][ T5307] console_unlock+0xd1/0x1c0 [ 87.039600][ T5307] ? __pfx_console_unlock+0x10/0x10 [ 87.039614][ T5307] ? _raw_spin_unlock+0x40/0x50 [ 87.039624][ T5307] ? _printk+0xdd/0x130 [ 87.039633][ T5307] vprintk_emit+0x485/0x560 [ 87.039650][ T5307] ? __lock_acquire+0x683/0x2cf0 [ 87.039666][ T5307] ? __pfx_vprintk_emit+0x10/0x10 [ 87.039685][ T5307] ? __lock_acquire+0x683/0x2cf0 [ 87.039700][ T5307] _printk+0xdd/0x130 [ 87.039709][ T5307] ? __lock_acquire+0x683/0x2cf0 [ 87.039724][ T5307] ? __pfx__printk+0x10/0x10 [ 87.039736][ T5307] ? lock_acquire+0x106/0x350 [ 87.039750][ T5307] __slab_bug+0x6e/0xd0 [ 87.039761][ T5307] slab_bug+0x57/0x80 [ 87.039773][ T5307] list_slab_objects+0x35/0x1a0 [ 87.039785][ T5307] __kmem_cache_shutdown+0x1a5/0x2a0 [ 87.039841][ T5307] ? virtio_gpu_free_vbufs+0x40/0x70 [ 87.039854][ T5307] kmem_cache_destroy+0x98/0x180 [ 87.039869][ T5307] virtio_gpu_free_vbufs+0x40/0x70 [ 87.039888][ T5307] ? __pfx_virtio_gpu_release+0x10/0x10 [ 87.039898][ T5307] virtio_gpu_release+0x55/0x140 [ 87.039908][ T5307] ? __pfx_virtio_gpu_release+0x10/0x10 [ 87.039918][ T5307] drm_dev_put+0xa9/0x120 [ 87.039929][ T5307] virtio_dev_remove+0x9c/0x1b0 [ 87.039939][ T5307] ? __pfx_virtio_dev_remove+0x10/0x10 [ 87.039949][ T5307] device_release_driver_internal+0x48b/0x880 [ 87.039960][ T5307] bus_remove_device+0x444/0x560 [ 87.039973][ T5307] ? __pfx_bus_remove_device+0x10/0x10 [ 87.039985][ T5307] ? kernfs_remove_by_name_ns+0x101/0x140 [ 87.040000][ T5307] device_del+0x524/0x8f0 [ 87.040013][ T5307] ? __pfx_device_del+0x10/0x10 [ 87.040034][ T5307] device_unregister+0x21/0xf0 [ 87.040050][ T5307] unregister_virtio_device+0x37/0x60 [ 87.040060][ T5307] virtio_pci_remove+0x7f/0xf0 [ 87.040076][ T5307] pci_device_remove+0x99/0x1c0 [ 87.040086][ T5307] ? __pfx_pci_device_remove+0x10/0x10 [ 87.040096][ T5307] device_release_driver_internal+0x48b/0x880 [ 87.040107][ T5307] pci_stop_bus_device+0xf6/0x120 [ 87.040119][ T5307] pci_stop_and_remove_bus_device_locked+0x77/0xb0 [ 87.040133][ T5307] remove_store+0xe5/0x150 [ 87.040146][ T5307] ? __pfx_remove_store+0x10/0x10 [ 87.040160][ T5307] ? sysfs_file_kobj+0x1e4/0x230 [ 87.040170][ T5307] ? sysfs_kf_write+0x166/0x260 [ 87.040180][ T5307] ? __pfx_sysfs_kf_write+0x10/0x10 [ 87.040189][ T5307] kernfs_fop_write_iter+0x3a4/0x540 [ 87.040204][ T5307] vfs_write+0x612/0xba0 [ 87.040217][ T5307] ? __pfx_vfs_write+0x10/0x10 [ 87.040232][ T5307] ? __fget_files+0x2a/0x420 [ 87.040246][ T5307] ksys_write+0x150/0x270 [ 87.040258][ T5307] ? __pfx_ksys_write+0x10/0x10 [ 87.040274][ T5307] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.040284][ T5307] do_syscall_64+0x174/0x580 [ 87.040296][ T5307] ? clear_bhb_loop+0x70/0xc0 [ 87.040307][ T5307] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.040317][ T5307] RIP: 0033:0x7ff3ce99e0d9 [ 87.040328][ T5307] 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 [ 87.040337][ T5307] RSP: 002b:00007ff3cf93afe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 87.040348][ T5307] RAX: ffffffffffffffda RBX: 00007ff3cec25fa0 RCX: 00007ff3ce99e0d9 [ 87.040355][ T5307] RDX: 0000000000000001 RSI: 0000200000000800 RDI: 0000000000000004 [ 87.040362][ T5307] RBP: 00007ff3cea35024 R08: 0000000000000000 R09: 0000000000000000 [ 87.040368][ T5307] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 87.040375][ T5307] R13: 00007ff3cec26038 R14: 00007ff3cec25fa0 R15: 00007fffff4ae1f8 [ 87.040386][ T5307] [ 87.585743][ T5307] BUG virtio-gpu-vbufs (Not tainted): Objects remaining on __kmem_cache_shutdown() [ 87.589510][ T5307] ----------------------------------------------------------------------------- [ 87.589510][ T5307] [ 87.593913][ T5307] Object 0xffff88803e401578 @offset=1400 [ 87.596231][ T5307] Object 0xffff88803e401690 @offset=1680 [ 87.598390][ T5307] Slab 0xffffea0000f90040 objects=14 used=2 fp=0xffff88803e401000 flags=0x4fff00000000200(workingset|node=1|zone=1|lastcpupid=0x7ff) [ 87.603980][ T5307] ------------[ cut here ]------------ [ 87.606312][ T5307] 1 [ 87.606320][ T5307] WARNING: mm/slub.c:1244 at __slab_err+0x15/0x20, CPU#0: syz.0.0/5307 [ 87.610768][ T5307] Modules linked in: [ 87.612464][ T5307] CPU: 0 UID: 0 PID: 5307 Comm: syz.0.0 Tainted: G B syzkaller #0 PREEMPT(full) [ 87.616819][ T5307] Tainted: [B]=BAD_PAGE [ 87.618297][ T5307] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 87.622244][ T5307] RIP: 0010:__slab_err+0x15/0x20 [ 87.624273][ T5307] 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 [ 87.632067][ T5307] RSP: 0000:ffffc9000e7076d8 EFLAGS: 00010083 [ 87.634623][ T5307] RAX: ffffffff8186dc3a RBX: ffff88801c2b0c80 RCX: 0000000000100000 [ 87.637757][ T5307] RDX: ffffc9000f249000 RSI: 000000000006a1e4 RDI: 000000000006a1e5 [ 87.640837][ T5307] RBP: ffffea00010c6e10 R08: ffffffff9373e0c7 R09: 1ffffffff26e7c18 [ 87.644023][ T5307] R10: dffffc0000000000 R11: fffffbfff26e7c19 R12: ffff888032ccadc8 [ 87.647215][ T5307] R13: ffffea0000f90040 R14: ffffc9000e7076f0 R15: ffff888032ccad80 [ 87.650628][ T5307] FS: 00007ff3cf93b6c0(0000) GS:ffff88808c54a000(0000) knlGS:0000000000000000 [ 87.654383][ T5307] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.657153][ T5307] CR2: 00007ff3c3763000 CR3: 000000003a13e000 CR4: 0000000000352ef0 [ 87.660460][ T5307] Call Trace: [ 87.661920][ T5307] [ 87.663129][ T5307] __kmem_cache_shutdown+0x1a5/0x2a0 [ 87.665008][ T5307] ? virtio_gpu_free_vbufs+0x40/0x70 [ 87.666794][ T5307] kmem_cache_destroy+0x98/0x180 [ 87.668525][ T5307] virtio_gpu_free_vbufs+0x40/0x70 [ 87.670642][ T5307] ? __pfx_virtio_gpu_release+0x10/0x10 [ 87.673158][ T5307] virtio_gpu_release+0x55/0x140 [ 87.675627][ T5307] ? __pfx_virtio_gpu_release+0x10/0x10 [ 87.678332][ T5307] drm_dev_put+0xa9/0x120 [ 87.680473][ T5307] virtio_dev_remove+0x9c/0x1b0 [ 87.682784][ T5307] ? __pfx_virtio_dev_remove+0x10/0x10 [ 87.685122][ T5307] device_release_driver_internal+0x48b/0x880 [ 87.687711][ T5307] bus_remove_device+0x444/0x560 [ 87.689774][ T5307] ? __pfx_bus_remove_device+0x10/0x10 [ 87.691977][ T5307] ? kernfs_remove_by_name_ns+0x101/0x140 [ 87.694302][ T5307] device_del+0x524/0x8f0 [ 87.696007][ T5307] ? __pfx_device_del+0x10/0x10 [ 87.697991][ T5307] device_unregister+0x21/0xf0 [ 87.699968][ T5307] unregister_virtio_device+0x37/0x60 [ 87.702152][ T5307] virtio_pci_remove+0x7f/0xf0 [ 87.704244][ T5307] pci_device_remove+0x99/0x1c0 [ 87.706371][ T5307] ? __pfx_pci_device_remove+0x10/0x10 [ 87.708566][ T5307] device_release_driver_internal+0x48b/0x880 [ 87.711088][ T5307] pci_stop_bus_device+0xf6/0x120 [ 87.713186][ T5307] pci_stop_and_remove_bus_device_locked+0x77/0xb0 [ 87.715912][ T5307] remove_store+0xe5/0x150 [ 87.717850][ T5307] ? __pfx_remove_store+0x10/0x10 [ 87.720071][ T5307] ? sysfs_file_kobj+0x1e4/0x230 [ 87.722262][ T5307] ? sysfs_kf_write+0x166/0x260 [ 87.724300][ T5307] ? __pfx_sysfs_kf_write+0x10/0x10 [ 87.726433][ T5307] kernfs_fop_write_iter+0x3a4/0x540 [ 87.728387][ T5307] vfs_write+0x612/0xba0 [ 87.729950][ T5307] ? __pfx_vfs_write+0x10/0x10 [ 87.731846][ T5307] ? __fget_files+0x2a/0x420 [ 87.733645][ T5307] ksys_write+0x150/0x270 [ 87.735371][ T5307] ? __pfx_ksys_write+0x10/0x10 [ 87.737306][ T5307] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.739780][ T5307] do_syscall_64+0x174/0x580 [ 87.741604][ T5307] ? clear_bhb_loop+0x70/0xc0 [ 87.743366][ T5307] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.745716][ T5307] RIP: 0033:0x7ff3ce99e0d9 [ 87.747582][ T5307] 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 [ 87.755408][ T5307] RSP: 002b:00007ff3cf93afe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 87.758715][ T5307] RAX: ffffffffffffffda RBX: 00007ff3cec25fa0 RCX: 00007ff3ce99e0d9 [ 87.761892][ T5307] RDX: 0000000000000001 RSI: 0000200000000800 RDI: 0000000000000004 [ 87.764796][ T5307] RBP: 00007ff3cea35024 R08: 0000000000000000 R09: 0000000000000000 [ 87.768047][ T5307] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 87.771108][ T5307] R13: 00007ff3cec26038 R14: 00007ff3cec25fa0 R15: 00007fffff4ae1f8 [ 87.774315][ T5307] [ 87.775627][ T5307] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 87.778554][ T5307] CPU: 0 UID: 0 PID: 5307 Comm: syz.0.0 Tainted: G B syzkaller #0 PREEMPT(full) [ 87.782714][ T5307] Tainted: [B]=BAD_PAGE [ 87.784440][ T5307] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 87.788537][ T5307] Call Trace: [ 87.789946][ T5307] [ 87.791178][ T5307] vpanic+0x56c/0xa60 [ 87.792818][ T5307] ? __pfx__printk+0x10/0x10 [ 87.794734][ T5307] ? __pfx_vpanic+0x10/0x10 [ 87.796743][ T5307] ? is_bpf_text_address+0x292/0x2b0 [ 87.798959][ T5307] ? is_bpf_text_address+0x26/0x2b0 [ 87.801147][ T5307] panic+0xc5/0xd0 [ 87.802694][ T5307] ? __pfx_panic+0x10/0x10 [ 87.804573][ T5307] __warn+0x315/0x4c0 [ 87.806247][ T5307] ? __slab_err+0x15/0x20 [ 87.808067][ T5307] ? __slab_err+0x15/0x20 [ 87.809700][ T5307] __report_bug+0x276/0x570 [ 87.811368][ T5307] ? do_raw_spin_unlock+0x4d/0x210 [ 87.813167][ T5307] ? __slab_err+0x15/0x20 [ 87.814829][ T5307] ? __pfx___report_bug+0x10/0x10 [ 87.816902][ T5307] ? __wake_up_klogd+0xe6/0x120 [ 87.818930][ T5307] ? vprintk_emit+0x4eb/0x560 [ 87.820886][ T5307] ? __pfx_vprintk_emit+0x10/0x10 [ 87.822975][ T5307] ? _printk+0xdd/0x130 [ 87.824717][ T5307] ? __slab_err+0x15/0x20 [ 87.826557][ T5307] report_bug+0x16a/0x220 [ 87.828311][ T5307] ? __slab_err+0x15/0x20 [ 87.830086][ T5307] ? __slab_err+0x17/0x20 [ 87.831906][ T5307] handle_bug+0x9c/0x200 [ 87.833691][ T5307] exc_invalid_op+0x1a/0x50 [ 87.835603][ T5307] asm_exc_invalid_op+0x1a/0x20 [ 87.837584][ T5307] RIP: 0010:__slab_err+0x15/0x20 [ 87.839650][ T5307] 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 [ 87.847260][ T5307] RSP: 0000:ffffc9000e7076d8 EFLAGS: 00010083 [ 87.849811][ T5307] RAX: ffffffff8186dc3a RBX: ffff88801c2b0c80 RCX: 0000000000100000 [ 87.853091][ T5307] RDX: ffffc9000f249000 RSI: 000000000006a1e4 RDI: 000000000006a1e5 [ 87.856307][ T5307] RBP: ffffea00010c6e10 R08: ffffffff9373e0c7 R09: 1ffffffff26e7c18 [ 87.859651][ T5307] R10: dffffc0000000000 R11: fffffbfff26e7c19 R12: ffff888032ccadc8 [ 87.863506][ T5307] R13: ffffea0000f90040 R14: ffffc9000e7076f0 R15: ffff888032ccad80 [ 87.866668][ T5307] ? add_taint+0x9a/0xe0 [ 87.868652][ T5307] ? __slab_err+0x14/0x20 [ 87.870900][ T5307] __kmem_cache_shutdown+0x1a5/0x2a0 [ 87.873725][ T5307] ? virtio_gpu_free_vbufs+0x40/0x70 [ 87.876058][ T5307] kmem_cache_destroy+0x98/0x180 [ 87.878094][ T5307] virtio_gpu_free_vbufs+0x40/0x70 [ 87.880280][ T5307] ? __pfx_virtio_gpu_release+0x10/0x10 [ 87.882611][ T5307] virtio_gpu_release+0x55/0x140 [ 87.884764][ T5307] ? __pfx_virtio_gpu_release+0x10/0x10 [ 87.887123][ T5307] drm_dev_put+0xa9/0x120 [ 87.889125][ T5307] virtio_dev_remove+0x9c/0x1b0 [ 87.891196][ T5307] ? __pfx_virtio_dev_remove+0x10/0x10 [ 87.893630][ T5307] device_release_driver_internal+0x48b/0x880 [ 87.896222][ T5307] bus_remove_device+0x444/0x560 [ 87.898146][ T5307] ? __pfx_bus_remove_device+0x10/0x10 [ 87.900159][ T5307] ? kernfs_remove_by_name_ns+0x101/0x140 [ 87.902168][ T5307] device_del+0x524/0x8f0 [ 87.903670][ T5307] ? __pfx_device_del+0x10/0x10 [ 87.905390][ T5307] device_unregister+0x21/0xf0 [ 87.907068][ T5307] unregister_virtio_device+0x37/0x60 [ 87.908966][ T5307] virtio_pci_remove+0x7f/0xf0 [ 87.910684][ T5307] pci_device_remove+0x99/0x1c0 [ 87.912368][ T5307] ? __pfx_pci_device_remove+0x10/0x10 [ 87.914375][ T5307] device_release_driver_internal+0x48b/0x880 [ 87.916773][ T5307] pci_stop_bus_device+0xf6/0x120 [ 87.918704][ T5307] pci_stop_and_remove_bus_device_locked+0x77/0xb0 [ 87.921160][ T5307] remove_store+0xe5/0x150 [ 87.922722][ T5307] ? __pfx_remove_store+0x10/0x10 [ 87.924768][ T5307] ? sysfs_file_kobj+0x1e4/0x230 [ 87.926853][ T5307] ? sysfs_kf_write+0x166/0x260 [ 87.928998][ T5307] ? __pfx_sysfs_kf_write+0x10/0x10 [ 87.931258][ T5307] kernfs_fop_write_iter+0x3a4/0x540 [ 87.933509][ T5307] vfs_write+0x612/0xba0 [ 87.935358][ T5307] ? __pfx_vfs_write+0x10/0x10 [ 87.937384][ T5307] ? __fget_files+0x2a/0x420 [ 87.939394][ T5307] ksys_write+0x150/0x270 [ 87.941146][ T5307] ? __pfx_ksys_write+0x10/0x10 [ 87.942881][ T5307] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.945210][ T5307] do_syscall_64+0x174/0x580 [ 87.947050][ T5307] ? clear_bhb_loop+0x70/0xc0 [ 87.949059][ T5307] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.951466][ T5307] RIP: 0033:0x7ff3ce99e0d9 [ 87.953279][ T5307] 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 [ 87.960685][ T5307] RSP: 002b:00007ff3cf93afe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 87.963642][ T5307] RAX: ffffffffffffffda RBX: 00007ff3cec25fa0 RCX: 00007ff3ce99e0d9 [ 87.966644][ T5307] RDX: 0000000000000001 RSI: 0000200000000800 RDI: 0000000000000004 [ 87.969712][ T5307] RBP: 00007ff3cea35024 R08: 0000000000000000 R09: 0000000000000000 [ 87.972948][ T5307] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 87.977030][ T5307] R13: 00007ff3cec26038 R14: 00007ff3cec25fa0 R15: 00007fffff4ae1f8 [ 87.980098][ T5307] [ 87.981674][ T5307] Kernel Offset: disabled [ 87.983324][ T5307] Rebooting in 86400 seconds..