usb 3-1: USB disconnect, device number 7 ------------[ cut here ]------------ ================================================================== BUG: KASAN: use-after-free in string_nocheck lib/vsprintf.c:642 [inline] BUG: KASAN: use-after-free in string+0x218/0x2b0 lib/vsprintf.c:724 Read of size 1 at addr ffff88805f01b5e4 by task kworker/0:54/7299 CPU: 0 PID: 7299 Comm: kworker/0:54 Not tainted 5.15.103-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 string_nocheck lib/vsprintf.c:642 [inline] string+0x218/0x2b0 lib/vsprintf.c:724 vsnprintf+0x11fc/0x1c70 lib/vsprintf.c:2806 vprintk_store+0x3ba/0x1300 kernel/printk/printk.c:2158 vprintk_emit+0x83/0x150 kernel/printk/printk.c:2252 __warn_printk+0xda/0x120 kernel/panic.c:713 remove_proc_entry+0x556/0x5c0 fs/proc/generic.c:718 scsi_proc_hostdir_rm+0xe4/0x130 drivers/scsi/scsi_proc.c:127 scsi_remove_host+0x15e/0x690 drivers/scsi/hosts.c:183 quiesce_and_remove_host drivers/usb/storage/usb.c:867 [inline] usb_stor_disconnect+0x14a/0x1f0 drivers/usb/storage/usb.c:1087 usb_unbind_interface+0x1cd/0x840 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1224 [inline] device_release_driver_internal+0x50e/0x7f0 drivers/base/dd.c:1257 bus_remove_device+0x2e5/0x400 drivers/base/bus.c:529 device_del+0x6e2/0xbd0 drivers/base/core.c:3582 usb_disable_device+0x3b8/0x840 drivers/usb/core/message.c:1419 usb_disconnect+0x33c/0x8c0 drivers/usb/core/hub.c:2231 hub_port_connect drivers/usb/core/hub.c:5202 [inline] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] port_event drivers/usb/core/hub.c:5648 [inline] hub_event+0x1e63/0x56d0 drivers/usb/core/hub.c:5730 process_one_work+0x90d/0x1270 kernel/workqueue.c:2306 worker_thread+0xaca/0x1280 kernel/workqueue.c:2453 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Allocated by task 3613: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x2e0 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] __proc_create+0x419/0x9f0 fs/proc/generic.c:426 proc_create_reg fs/proc/generic.c:553 [inline] proc_create_data+0x124/0x2b0 fs/proc/generic.c:573 scsi_proc_host_add+0x134/0x230 drivers/scsi/scsi_proc.c:148 scsi_add_host_with_dma+0x62a/0x990 drivers/scsi/hosts.c:293 scsi_add_host include/scsi/scsi_host.h:773 [inline] usb_stor_probe2+0x938/0xd60 drivers/usb/storage/usb.c:1056 isd200_probe+0x185/0x1e0 drivers/usb/storage/isd200.c:1555 usb_probe_interface+0x5c0/0xaf0 drivers/usb/core/driver.c:396 really_probe+0x24e/0xb60 drivers/base/dd.c:595 __driver_probe_device+0x1c3/0x3f0 drivers/base/dd.c:750 driver_probe_device+0x50/0x420 drivers/base/dd.c:780 __device_attach_driver+0x2b9/0x500 drivers/base/dd.c:902 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x359/0x570 drivers/base/dd.c:974 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487 device_add+0xb48/0xfd0 drivers/base/core.c:3394 usb_set_configuration+0x19dd/0x2020 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x84/0x140 drivers/usb/core/generic.c:238 usb_probe_device+0x130/0x260 drivers/usb/core/driver.c:293 really_probe+0x24e/0xb60 drivers/base/dd.c:595 __driver_probe_device+0x1c3/0x3f0 drivers/base/dd.c:750 driver_probe_device+0x50/0x420 drivers/base/dd.c:780 __device_attach_driver+0x2b9/0x500 drivers/base/dd.c:902 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x359/0x570 drivers/base/dd.c:974 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487 device_add+0xb48/0xfd0 drivers/base/core.c:3394 usb_new_device+0xc17/0x18d0 drivers/usb/core/hub.c:2568 hub_port_connect drivers/usb/core/hub.c:5358 [inline] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] port_event drivers/usb/core/hub.c:5648 [inline] hub_event+0x2dd8/0x56d0 drivers/usb/core/hub.c:5730 process_one_work+0x90d/0x1270 kernel/workqueue.c:2306 worker_thread+0xaca/0x1280 kernel/workqueue.c:2453 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Freed by task 3613: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x91/0x260 mm/slub.c:3515 remove_proc_entry+0x446/0x5c0 fs/proc/generic.c:721 scsi_proc_host_rm+0x13e/0x1b0 drivers/scsi/scsi_proc.c:168 scsi_remove_host+0x139/0x690 drivers/scsi/hosts.c:182 quiesce_and_remove_host drivers/usb/storage/usb.c:867 [inline] usb_stor_disconnect+0x14a/0x1f0 drivers/usb/storage/usb.c:1087 usb_unbind_interface+0x1cd/0x840 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1224 [inline] device_release_driver_internal+0x50e/0x7f0 drivers/base/dd.c:1257 bus_remove_device+0x2e5/0x400 drivers/base/bus.c:529 device_del+0x6e2/0xbd0 drivers/base/core.c:3582 usb_disable_device+0x3b8/0x840 drivers/usb/core/message.c:1419 usb_disconnect+0x33c/0x8c0 drivers/usb/core/hub.c:2231 hub_port_connect drivers/usb/core/hub.c:5202 [inline] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] port_event drivers/usb/core/hub.c:5648 [inline] hub_event+0x1e63/0x56d0 drivers/usb/core/hub.c:5730 process_one_work+0x90d/0x1270 kernel/workqueue.c:2306 worker_thread+0xaca/0x1280 kernel/workqueue.c:2453 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff88805f01b500 which belongs to the cache proc_dir_entry of size 256 The buggy address is located 228 bytes inside of 256-byte region [ffff88805f01b500, ffff88805f01b600) The buggy address belongs to the page: page:ffffea00017c06c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805f01b280 pfn:0x5f01b flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea00012c44c0 0000000300000003 ffff8881406f4640 raw: ffff88805f01b280 00000000800c0007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 8978, ts 362254235433, free_ts 361328996430 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x32dd/0x3470 mm/page_alloc.c:4159 __alloc_pages+0x272/0x790 mm/page_alloc.c:5421 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x1e1/0x2e0 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] __proc_create+0x419/0x9f0 fs/proc/generic.c:426 proc_create_reg+0x8c/0x110 fs/proc/generic.c:553 proc_create_net_data+0xc3/0x1f0 fs/proc/proc_net.c:110 if6_proc_net_init+0x55/0x70 net/ipv6/addrconf.c:4402 ops_init+0x356/0x600 net/core/net_namespace.c:135 setup_net+0x358/0x9e0 net/core/net_namespace.c:329 copy_net_ns+0x395/0x5d0 net/core/net_namespace.c:473 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110 copy_namespaces+0x365/0x3b0 kernel/nsproxy.c:178 copy_process+0x1841/0x3ef0 kernel/fork.c:2201 kernel_clone+0x210/0xa50 kernel/fork.c:2601 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0xcb7/0xd70 mm/page_alloc.c:3317 free_unref_page_list+0x1f7/0x970 mm/page_alloc.c:3433 release_pages+0x1bb9/0x1f40 mm/swap.c:963 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu mm/mmu_gather.c:247 [inline] tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:338 exit_mmap+0x3cd/0x670 mm/mmap.c:3188 __mmput+0x112/0x3b0 kernel/fork.c:1118 exit_mm+0x688/0x7f0 kernel/exit.c:548 do_exit+0x626/0x2480 kernel/exit.c:859 __do_sys_exit kernel/exit.c:963 [inline] __se_sys_exit kernel/exit.c:961 [inline] __x64_sys_exit+0x3c/0x40 kernel/exit.c:961 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff88805f01b480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88805f01b500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805f01b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805f01b600: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff88805f01b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================