program: mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000040)='./sys\x00', &(0x7f0000000080)='sysfs\x00', 0x0, 0x0) syz_mount_image$btrfs(&(0x7f0000000100), &(0x7f0000000040)='./bus\x00', 0x810, &(0x7f0000000240)={[{@autodefrag}, {@compress_algo={'compress', 0x3d, 'zstd'}}, {@discard_async}, {@usebackuproot}, {@skip_balance}, {@rescue={'rescue', 0x3d, 'all'}}, {@nospace_cache}, {@acl}]}, 0xff, 0x5122, 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qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqsAMHAgAAAABA/q+NUFVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV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r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./bus\x00', 0x101142, 0xeaff) mount$bind(&(0x7f0000000440)='./sys\x00', &(0x7f0000000480)='./sys\x00', &(0x7f00000004c0), 0x1004010, 0x0) r1 = openat$dir(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x2000, 0x0) getdents64(r1, &(0x7f0000000000)=""/63, 0x3f) r2 = openat(0xffffffffffffff9c, &(0x7f00000000c0)='./sys/bus/platform/drivers/vhci_hcd/unbind\x00', 0x1, 0x0) write(r2, &(0x7f0000000100)='vhci_hcd.0\x00', 0xa) recvmsg$can_raw(r0, &(0x7f0000000400)={&(0x7f00000001c0)=@hci, 0x80, &(0x7f0000000300)=[{&(0x7f00000002c0)=""/5, 0x5}], 0x1, &(0x7f0000000340)=""/152, 0x98}, 0x40000000) r3 = openat(0xffffffffffffff9c, &(0x7f0000000140)='./sys/bus/platform/drivers/vhci_hcd/bind\x00', 0x1, 0x0) write(r3, &(0x7f0000000180)='vhci_hcd.0\x00', 0xa) [ 94.007166][ T4648] Bluetooth: hci0: command tx timeout [ 94.568623][ T5323] loop0: detected capacity change from 0 to 32768 [ 94.631319][ T5323] btrfs: Deprecated parameter 'usebackuproot' [ 94.640300][ T5323] BTRFS warning: 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 94.670821][ T5323] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5323) [ 94.730738][ T5323] BTRFS info (device loop0 state S): first mount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf [ 94.748119][ T5323] BTRFS info (device loop0 state S): using crc32c checksum algorithm [ 94.755792][ T5323] BTRFS error (device loop0 state S): nologreplay must be used with ro mount option [ 94.767239][ T5323] BTRFS error (device loop0 state S): open_ctree failed: -22 [ 94.806034][ T5323] vhci_hcd vhci_hcd.0: remove, state 4 [ 94.814421][ T5323] usb usb7: USB disconnect, device number 1 [ 94.914581][ T24] vhci_hcd vhci_hcd.0: stop threads [ 94.918283][ T24] vhci_hcd vhci_hcd.0: release socket [ 94.933286][ T24] vhci_hcd vhci_hcd.0: disconnect device [ 94.947459][ T24] vhci_hcd vhci_hcd.0: stop threads [ 94.955693][ T24] vhci_hcd vhci_hcd.0: release socket [ 94.974730][ T24] vhci_hcd vhci_hcd.0: disconnect device [ 94.983820][ T24] vhci_hcd vhci_hcd.0: stop threads [ 95.006692][ T24] vhci_hcd vhci_hcd.0: release socket [ 95.012930][ T24] vhci_hcd vhci_hcd.0: disconnect device [ 95.021290][ T24] vhci_hcd vhci_hcd.0: stop threads [ 95.028921][ T24] vhci_hcd vhci_hcd.0: release socket [ 95.044094][ T24] vhci_hcd vhci_hcd.0: disconnect device [ 95.055372][ T5323] vhci_hcd vhci_hcd.0: USB bus 7 deregistered [ 95.058283][ T24] vhci_hcd vhci_hcd.0: stop threads [ 95.064359][ T24] vhci_hcd vhci_hcd.0: release socket [ 95.072857][ T24] vhci_hcd vhci_hcd.0: disconnect device [ 95.082428][ T24] vhci_hcd vhci_hcd.0: stop threads [ 95.090556][ T5323] vhci_hcd vhci_hcd.0: remove, state 4 [ 95.094188][ T24] ================================================================== [ 95.097628][ T24] BUG: KASAN: slab-use-after-free in vhci_shutdown_connection+0x1d4/0x650 [ 95.101240][ T24] Read of size 8 at addr ffff8880345fd0c0 by task kworker/u4:2/24 [ 95.104471][ T24] [ 95.105566][ T24] CPU: 0 UID: 0 PID: 24 Comm: kworker/u4:2 Not tainted syzkaller #0 PREEMPT(full) [ 95.105581][ T24] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 95.105589][ T24] Workqueue: usbip_event event_handler [ 95.105607][ T24] Call Trace: [ 95.105613][ T24] [ 95.105618][ T24] dump_stack_lvl+0xe8/0x150 [ 95.105634][ T24] print_address_description+0x55/0x1e0 [ 95.105649][ T24] ? vhci_shutdown_connection+0x1d4/0x650 [ 95.105660][ T24] print_report+0x58/0x70 [ 95.105672][ T24] kasan_report+0x117/0x150 [ 95.105686][ T24] ? vhci_shutdown_connection+0x1d4/0x650 [ 95.105698][ T24] vhci_shutdown_connection+0x1d4/0x650 [ 95.105710][ T24] event_handler+0x2a4/0x4b0 [ 95.105720][ T24] ? process_scheduled_works+0xa20/0x14e0 [ 95.105730][ T24] process_scheduled_works+0xa8e/0x14e0 [ 95.105746][ T24] ? __pfx_process_scheduled_works+0x10/0x10 [ 95.105765][ T24] ? assign_work+0x3cf/0x5d0 [ 95.105777][ T24] worker_thread+0xa47/0xfb0 [ 95.105792][ T24] ? __kthread_parkme+0x71/0x1f0 [ 95.105808][ T24] kthread+0x388/0x470 [ 95.105822][ T24] ? __pfx_worker_thread+0x10/0x10 [ 95.105833][ T24] ? __pfx_kthread+0x10/0x10 [ 95.105846][ T24] ret_from_fork+0x514/0xb70 [ 95.105861][ T24] ? __pfx_ret_from_fork+0x10/0x10 [ 95.105874][ T24] ? __switch_to+0xc89/0x1420 [ 95.105887][ T24] ? __pfx_kthread+0x10/0x10 [ 95.105901][ T24] ret_from_fork_asm+0x1a/0x30 [ 95.105915][ T24] [ 95.105919][ T24] [ 95.167359][ T24] Allocated by task 1: [ 95.169328][ T24] kasan_save_track+0x3e/0x80 [ 95.171387][ T24] __kasan_kmalloc+0x93/0xb0 [ 95.173315][ T24] __kmalloc_noprof+0x375/0x720 [ 95.175343][ T24] __usb_create_hcd+0x67/0x900 [ 95.178118][ T24] vhci_hcd_probe+0x1e6/0x3e0 [ 95.180087][ T24] platform_probe+0xf9/0x190 [ 95.182056][ T24] really_probe+0x254/0xae0 [ 95.183999][ T24] __driver_probe_device+0x1e8/0x360 [ 95.186233][ T24] driver_probe_device+0x4f/0x240 [ 95.188365][ T24] __device_attach_driver+0x270/0x410 [ 95.190468][ T24] bus_for_each_drv+0x258/0x2f0 [ 95.192471][ T24] __device_attach+0x2c4/0x450 [ 95.194491][ T24] device_initial_probe+0xa1/0xd0 [ 95.196723][ T24] bus_probe_device+0x12a/0x220 [ 95.198761][ T24] device_add+0x7d7/0xb80 [ 95.200499][ T24] platform_device_add+0x4bd/0x860 [ 95.202604][ T24] platform_device_register_full+0x62d/0x710 [ 95.204891][ T24] vhci_hcd_init+0x227/0x360 [ 95.208317][ T24] do_one_initcall+0x250/0x870 [ 95.210158][ T24] do_initcall_level+0x10a/0x1a0 [ 95.212052][ T24] do_initcalls+0x59/0xa0 [ 95.213836][ T24] kernel_init_freeable+0x29d/0x3e0 [ 95.215994][ T24] kernel_init+0x1d/0x1d0 [ 95.217796][ T24] ret_from_fork+0x514/0xb70 [ 95.219764][ T24] ret_from_fork_asm+0x1a/0x30 [ 95.221813][ T24] [ 95.222792][ T24] Freed by task 5323: [ 95.224401][ T24] kasan_save_track+0x3e/0x80 [ 95.226328][ T24] kasan_save_free_info+0x40/0x50 [ 95.228483][ T24] __kasan_slab_free+0x5c/0x80 [ 95.230548][ T24] kfree+0x1c5/0x640 [ 95.232135][ T24] vhci_hcd_remove+0x9e/0x110 [ 95.234030][ T24] device_release_driver_internal+0x48b/0x880 [ 95.236629][ T24] unbind_store+0x1a1/0x1d0 [ 95.238576][ T24] kernfs_fop_write_iter+0x3a4/0x540 [ 95.240783][ T24] vfs_write+0x612/0xba0 [ 95.242577][ T24] ksys_write+0x150/0x270 [ 95.244442][ T24] do_syscall_64+0x174/0x580 [ 95.246385][ T24] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 95.248886][ T24] [ 95.249933][ T24] Last potentially related work creation: [ 95.252358][ T24] kasan_save_stack+0x3e/0x60 [ 95.254334][ T24] kasan_record_aux_stack+0xbd/0xd0 [ 95.256584][ T24] insert_work+0x3d/0x330 [ 95.258432][ T24] __queue_work+0xcd8/0x10a0 [ 95.260431][ T24] queue_work_on+0x106/0x1d0 [ 95.262422][ T24] unlink1+0x344/0x3e0 [ 95.264247][ T24] usb_hcd_unlink_urb+0xe6/0x1e0 [ 95.266341][ T24] usb_kill_urb+0x10b/0x2f0 [ 95.268334][ T24] hub_quiesce+0x211/0x330 [ 95.270270][ T24] hub_suspend+0x904/0xad0 [ 95.272247][ T24] usb_suspend_both+0x285/0x1040 [ 95.274345][ T24] usb_runtime_suspend+0x58/0x110 [ 95.276539][ T24] __rpm_callback+0x2c7/0x950 [ 95.278540][ T24] rpm_suspend+0x8a0/0x17b0 [ 95.280554][ T24] __pm_runtime_suspend+0x12f/0x1a0 [ 95.282805][ T24] usb_new_device+0xadf/0x1620 [ 95.284923][ T24] register_root_hub+0x250/0x5c0 [ 95.287002][ T24] usb_add_hcd+0xac7/0xf80 [ 95.288936][ T24] vhci_hcd_probe+0x1fa/0x3e0 [ 95.290976][ T24] platform_probe+0xf9/0x190 [ 95.292956][ T24] really_probe+0x254/0xae0 [ 95.294824][ T24] __driver_probe_device+0x1e8/0x360 [ 95.296974][ T24] driver_probe_device+0x4f/0x240 [ 95.299042][ T24] __device_attach_driver+0x270/0x410 [ 95.301210][ T24] bus_for_each_drv+0x258/0x2f0 [ 95.303177][ T24] __device_attach+0x2c4/0x450 [ 95.305219][ T24] device_initial_probe+0xa1/0xd0 [ 95.307308][ T24] bus_probe_device+0x12a/0x220 [ 95.309350][ T24] device_add+0x7d7/0xb80 [ 95.311219][ T24] platform_device_add+0x4bd/0x860 [ 95.313481][ T24] platform_device_register_full+0x62d/0x710 [ 95.316065][ T24] vhci_hcd_init+0x227/0x360 [ 95.318007][ T24] do_one_initcall+0x250/0x870 [ 95.320029][ T24] do_initcall_level+0x10a/0x1a0 [ 95.322205][ T24] do_initcalls+0x59/0xa0 [ 95.324194][ T24] kernel_init_freeable+0x29d/0x3e0 [ 95.326422][ T24] kernel_init+0x1d/0x1d0 [ 95.328282][ T24] ret_from_fork+0x514/0xb70 [ 95.330293][ T24] ret_from_fork_asm+0x1a/0x30 [ 95.332368][ T24] [ 95.333375][ T24] Second to last potentially related work creation: [ 95.336045][ T24] kasan_save_stack+0x3e/0x60 [ 95.337990][ T24] kasan_record_aux_stack+0xbd/0xd0 [ 95.340175][ T24] insert_work+0x3d/0x330 [ 95.341950][ T24] __queue_work+0xcd8/0x10a0 [ 95.343811][ T24] queue_work_on+0x106/0x1d0 [ 95.345894][ T24] usb_hcd_submit_urb+0xa3b/0x1b60 [ 95.348029][ T24] usb_start_wait_urb+0x13f/0x5b0 [ 95.350038][ T24] usb_control_msg+0x234/0x3e0 [ 95.351898][ T24] hub_suspend+0x891/0xad0 [ 95.353662][ T24] usb_suspend_both+0x285/0x1040 [ 95.355597][ T24] usb_runtime_suspend+0x58/0x110 [ 95.357643][ T24] __rpm_callback+0x2c7/0x950 [ 95.359471][ T24] rpm_suspend+0x8a0/0x17b0 [ 95.361248][ T24] __pm_runtime_suspend+0x12f/0x1a0 [ 95.363538][ T24] usb_new_device+0xadf/0x1620 [ 95.365470][ T24] register_root_hub+0x250/0x5c0 [ 95.367535][ T24] usb_add_hcd+0xac7/0xf80 [ 95.369485][ T24] vhci_hcd_probe+0x1fa/0x3e0 [ 95.371524][ T24] platform_probe+0xf9/0x190 [ 95.373526][ T24] really_probe+0x254/0xae0 [ 95.375540][ T24] __driver_probe_device+0x1e8/0x360 [ 95.377856][ T24] driver_probe_device+0x4f/0x240 [ 95.380123][ T24] __device_attach_driver+0x270/0x410 [ 95.382469][ T24] bus_for_each_drv+0x258/0x2f0 [ 95.384653][ T24] __device_attach+0x2c4/0x450 [ 95.386679][ T24] device_initial_probe+0xa1/0xd0 [ 95.388904][ T24] bus_probe_device+0x12a/0x220 [ 95.391060][ T24] device_add+0x7d7/0xb80 [ 95.392933][ T24] platform_device_add+0x4bd/0x860 [ 95.395093][ T24] platform_device_register_full+0x62d/0x710 [ 95.397590][ T24] vhci_hcd_init+0x227/0x360 [ 95.399616][ T24] do_one_initcall+0x250/0x870 [ 95.401754][ T24] do_initcall_level+0x10a/0x1a0 [ 95.403934][ T24] do_initcalls+0x59/0xa0 [ 95.405881][ T24] kernel_init_freeable+0x29d/0x3e0 [ 95.408207][ T24] kernel_init+0x1d/0x1d0 [ 95.410105][ T24] ret_from_fork+0x514/0xb70 [ 95.412137][ T24] ret_from_fork_asm+0x1a/0x30 [ 95.414213][ T24] [ 95.415304][ T24] The buggy address belongs to the object at ffff8880345fc000 [ 95.415304][ T24] which belongs to the cache kmalloc-8k of size 8192 [ 95.421145][ T24] The buggy address is located 4288 bytes inside of [ 95.421145][ T24] freed 8192-byte region [ffff8880345fc000, ffff8880345fe000) [ 95.426803][ T24] [ 95.427850][ T24] The buggy address belongs to the physical page: [ 95.430415][ T24] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x345f8 [ 95.433841][ T24] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 95.437089][ T24] flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) [ 95.440157][ T24] page_type: f5(slab) [ 95.441789][ T24] raw: 04fff00000000040 ffff88801b042280 dead000000000122 0000000000000000 [ 95.445259][ T24] raw: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000 [ 95.448767][ T24] head: 04fff00000000040 ffff88801b042280 dead000000000122 0000000000000000 [ 95.452414][ T24] head: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000 [ 95.456106][ T24] head: 04fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff [ 95.459603][ T24] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 [ 95.463104][ T24] page dumped because: kasan: bad access detected [ 95.465762][ T24] page_owner tracks the page as allocated [ 95.468123][ T24] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 17084197481, free_ts 16996992572 [ 95.476545][ T24] post_alloc_hook+0x1f9/0x250 [ 95.478562][ T24] get_page_from_freelist+0x21fa/0x2270 [ 95.480756][ T24] __alloc_frozen_pages_noprof+0x18d/0x380 [ 95.483271][ T24] allocate_slab+0x79/0x5e0 [ 95.485292][ T24] refill_objects+0x2d5/0x350 [ 95.487347][ T24] __pcs_replace_empty_main+0x2bf/0x6b0 [ 95.489688][ T24] __kmalloc_noprof+0x485/0x720 [ 95.491800][ T24] __usb_create_hcd+0x67/0x900 [ 95.493887][ T24] vhci_hcd_probe+0x1e6/0x3e0 [ 95.495990][ T24] platform_probe+0xf9/0x190 [ 95.497928][ T24] really_probe+0x254/0xae0 [ 95.499849][ T24] __driver_probe_device+0x1e8/0x360 [ 95.502207][ T24] driver_probe_device+0x4f/0x240 [ 95.504350][ T24] __device_attach_driver+0x270/0x410 [ 95.506657][ T24] bus_for_each_drv+0x258/0x2f0 [ 95.508721][ T24] __device_attach+0x2c4/0x450 [ 95.510761][ T24] page last free pid 1 tgid 1 stack trace: [ 95.513222][ T24] __free_frozen_pages+0xc1e/0xd10 [ 95.515450][ T24] __slab_free+0x274/0x2c0 [ 95.517440][ T24] qlist_free_all+0x99/0x100 [ 95.519420][ T24] kasan_quarantine_reduce+0x148/0x160 [ 95.521753][ T24] __kasan_slab_alloc+0x22/0x80 [ 95.523909][ T24] __kmalloc_cache_noprof+0x2ab/0x660 [ 95.526229][ T24] lookup_or_create_module_kobject+0x75/0x170 [ 95.528872][ T24] module_add_driver+0x79/0x320 [ 95.530914][ T24] bus_add_driver+0x391/0x670 [ 95.532922][ T24] driver_register+0x23a/0x320 [ 95.535028][ T24] vhci_hcd_init+0xea/0x360 [ 95.536946][ T24] do_one_initcall+0x250/0x870 [ 95.538988][ T24] do_initcall_level+0x10a/0x1a0 [ 95.541158][ T24] do_initcalls+0x59/0xa0 [ 95.543066][ T24] kernel_init_freeable+0x29d/0x3e0 [ 95.545349][ T24] kernel_init+0x1d/0x1d0 [ 95.547189][ T24] [ 95.548273][ T24] Memory state around the buggy address: [ 95.550710][ T24] ffff8880345fcf80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.554136][ T24] ffff8880345fd000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.557583][ T24] >ffff8880345fd080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.561830][ T24] ^ [ 95.564537][ T24] ffff8880345fd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.567748][ T24] ffff8880345fd180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.571033][ T24] ================================================================== [ 95.581745][ T5323] usb usb6: USB disconnect, device number 1 [ 95.691683][ T5323] vhci_hcd vhci_hcd.0: USB bus 6 deregistered [ 95.713215][ T5324] vhci_hcd vhci_hcd.0: USB/IP Virtual Host Controller [ 95.729586][ T5324] vhci_hcd vhci_hcd.0: new USB bus registered, assigned bus number 6 [ 95.735364][ T5324] vhci_hcd vhci_hcd.0: created sysfs vhci_hcd.0 [ 95.752199][ T5324] usb usb6: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 7.02 [ 95.757392][ T5324] usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 95.764529][ T5324] usb usb6: Product: USB/IP Virtual Host Controller [ 95.772068][ T5324] usb usb6: Manufacturer: Linux syzkaller vhci_hcd [ 95.775309][ T5324] usb usb6: SerialNumber: vhci_hcd.0 [ 95.798375][ T5324] hub 6-0:1.0: USB hub found [ 95.803679][ T5324] hub 6-0:1.0: 8 ports detected [ 95.827053][ T24] Kernel panic - not syncing: KASAN: panic_on_warn set ... [ 95.830189][ T24] CPU: 0 UID: 0 PID: 24 Comm: kworker/u4:2 Not tainted syzkaller #0 PREEMPT(full) [ 95.833944][ T24] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 95.838163][ T24] Workqueue: usbip_event event_handler [ 95.840509][ T24] Call Trace: [ 95.841943][ T24] [ 95.843140][ T24] vpanic+0x56c/0xa60 [ 95.844822][ T24] ? __pfx_vpanic+0x10/0x10 [ 95.846679][ T24] ? __pfx___schedule+0x10/0x10 [ 95.848625][ T24] panic+0xc5/0xd0 [ 95.850421][ T24] ? __pfx_panic+0x10/0x10 [ 95.852724][ T24] ? preempt_schedule_common+0x82/0xd0 [ 95.855710][ T24] ? vhci_shutdown_connection+0x1d4/0x650 [ 95.858405][ T24] check_panic_on_warn+0x89/0xb0 [ 95.860506][ T24] ? vhci_shutdown_connection+0x1d4/0x650 [ 95.862878][ T24] end_report+0x73/0x170 [ 95.864614][ T24] ? vhci_shutdown_connection+0x1d4/0x650 [ 95.866939][ T24] kasan_report+0x128/0x150 [ 95.868805][ T24] ? vhci_shutdown_connection+0x1d4/0x650 [ 95.871084][ T24] vhci_shutdown_connection+0x1d4/0x650 [ 95.873356][ T24] event_handler+0x2a4/0x4b0 [ 95.875280][ T24] ? process_scheduled_works+0xa20/0x14e0 [ 95.877656][ T24] process_scheduled_works+0xa8e/0x14e0 [ 95.879992][ T24] ? __pfx_process_scheduled_works+0x10/0x10 [ 95.882507][ T24] ? assign_work+0x3cf/0x5d0 [ 95.884496][ T24] worker_thread+0xa47/0xfb0 [ 95.886531][ T24] ? __kthread_parkme+0x71/0x1f0 [ 95.889041][ T24] kthread+0x388/0x470 [ 95.890979][ T24] ? __pfx_worker_thread+0x10/0x10 [ 95.893017][ T24] ? __pfx_kthread+0x10/0x10 [ 95.895006][ T24] ret_from_fork+0x514/0xb70 [ 95.897044][ T24] ? __pfx_ret_from_fork+0x10/0x10 [ 95.899110][ T24] ? __switch_to+0xc89/0x1420 [ 95.901065][ T24] ? __pfx_kthread+0x10/0x10 [ 95.903027][ T24] ret_from_fork_asm+0x1a/0x30 [ 95.905104][ T24] [ 95.906822][ T24] Kernel Offset: disabled [ 95.908658][ T24] Rebooting in 86400 seconds..