usb 1-1: USB disconnect, device number 2 ================================================================== BUG: KASAN: slab-use-after-free in free_all_midi2_umps sound/usb/midi2.c:689 [inline] BUG: KASAN: slab-use-after-free in snd_usb_midi_v2_free+0x524/0x6ec sound/usb/midi2.c:941 Write of size 8 at addr ffffaf8015390350 by task syz.0.16/3943 CPU: 1 UID: 0 PID: 3943 Comm: syz.0.16 Not tainted syzkaller #0 PREEMPT Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:149 [] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:155 [] __dump_stack lib/dump_stack.c:94 [inline] [] dump_stack_lvl+0x114/0x1aa lib/dump_stack.c:120 [] print_address_description mm/kasan/report.c:378 [inline] [] print_report+0x27a/0x592 mm/kasan/report.c:482 [] kasan_report+0xf0/0x26c mm/kasan/report.c:595 [] __asan_report_store8_noabort+0x12/0x1a mm/kasan/report_generic.c:386 [] free_all_midi2_umps sound/usb/midi2.c:689 [inline] [] snd_usb_midi_v2_free+0x524/0x6ec sound/usb/midi2.c:941 [] snd_usb_midi_v2_free_all+0x70/0xd0 sound/usb/midi2.c:1240 [] snd_usb_audio_free+0x3e/0x10a sound/usb/card.c:608 [] snd_card_do_free sound/core/init.c:594 [inline] [] release_card_device+0x98/0x1be sound/core/init.c:153 [] device_release+0xb4/0x24a drivers/base/core.c:2636 [] kobject_cleanup lib/kobject.c:689 [inline] [] kobject_release lib/kobject.c:720 [inline] [] kref_put include/linux/kref.h:65 [inline] [] kobject_put+0x20a/0x5de lib/kobject.c:737 [] put_device+0x28/0x3a drivers/base/core.c:3880 [] snd_card_free_when_closed sound/core/init.c:626 [inline] [] snd_card_free_when_closed+0x30/0x42 sound/core/init.c:620 [] usb_audio_disconnect+0x1d8/0x5cc sound/usb/card.c:1159 [] usb_unbind_interface+0x18a/0x812 drivers/usb/core/driver.c:458 [] device_remove drivers/base/dd.c:618 [inline] [] device_remove+0x11a/0x15c drivers/base/dd.c:610 [] __device_release_driver drivers/base/dd.c:1349 [inline] [] device_release_driver_internal+0x3ca/0x554 drivers/base/dd.c:1372 [] device_release_driver+0x1e/0x28 drivers/base/dd.c:1395 [] bus_remove_device+0x284/0x518 drivers/base/bus.c:664 [] device_del+0x312/0x870 drivers/base/core.c:3961 [] usb_disable_device+0x2d2/0x718 drivers/usb/core/message.c:1478 [] usb_disconnect+0x27c/0x89e drivers/usb/core/hub.c:2345 [] hub_quiesce+0x13e/0x2d6 drivers/usb/core/hub.c:1405 [] hub_disconnect+0xb0/0x48a drivers/usb/core/hub.c:1811 [] usb_unbind_interface+0x18a/0x812 drivers/usb/core/driver.c:458 [] device_remove drivers/base/dd.c:618 [inline] [] device_remove+0x11a/0x15c drivers/base/dd.c:610 [] __device_release_driver drivers/base/dd.c:1349 [inline] [] device_release_driver_internal+0x3ca/0x554 drivers/base/dd.c:1372 [] device_release_driver+0x1e/0x28 drivers/base/dd.c:1395 [] usb_driver_release_interface+0x108/0x174 drivers/usb/core/driver.c:640 [] proc_ioctl+0x546/0x650 drivers/usb/core/devio.c:2359 [] proc_ioctl_default drivers/usb/core/devio.c:2402 [inline] [] usbdev_do_ioctl+0x28de/0x5002 drivers/usb/core/devio.c:2766 [] usbdev_ioctl+0x26/0x34 drivers/usb/core/devio.c:2826 [] vfs_ioctl fs/ioctl.c:51 [inline] [] __do_sys_ioctl fs/ioctl.c:597 [inline] [] __se_sys_ioctl fs/ioctl.c:583 [inline] [] __riscv_sys_ioctl+0x17c/0x1e2 fs/ioctl.c:583 [] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112 [] do_trap_ecall_u+0x3e4/0x636 arch/riscv/kernel/traps.c:345 [] handle_exception+0x168/0x174 arch/riscv/kernel/entry.S:237 Allocated by task 3839: stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x66 mm/kasan/common.c:57 kasan_save_track+0x16/0x28 mm/kasan/common.c:78 kasan_save_alloc_info+0x30/0x3e mm/kasan/generic.c:570 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xa0/0xa6 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x258/0x676 mm/slub.c:5489 _kmalloc_noprof include/linux/slab.h:988 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] snd_ump_endpoint_new+0x98/0x3fe sound/core/ump.c:169 create_midi2_ump+0x286/0x7f8 sound/usb/midi2.c:717 find_matching_ep_partner sound/usb/midi2.c:781 [inline] parse_midi_2_0 sound/usb/midi2.c:973 [inline] snd_usb_midi_v2_create+0x10be/0x3fce sound/usb/midi2.c:1129 snd_usb_create_stream.isra.0+0x334/0x4ee sound/usb/card.c:290 snd_usb_create_streams sound/usb/card.c:392 [inline] usb_audio_probe+0xf86/0x330e sound/usb/card.c:1031 usb_probe_interface+0x2bc/0x916 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x222/0xa8e drivers/base/dd.c:706 __driver_probe_device+0x1d6/0x43e drivers/base/dd.c:868 driver_probe_device+0x5e/0x162 drivers/base/dd.c:898 __device_attach_driver+0x1c2/0x30a drivers/base/dd.c:1026 bus_for_each_drv+0x142/0x1dc drivers/base/bus.c:500 __device_attach+0x1c4/0x490 drivers/base/dd.c:1098 device_initial_probe+0xb2/0xc8 drivers/base/dd.c:1153 bus_probe_device+0x50/0x146 drivers/base/bus.c:620 device_add+0x1150/0x1880 drivers/base/core.c:3772 usb_set_configuration+0xe92/0x196e drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x9e/0x11a drivers/usb/core/generic.c:250 usb_probe_device+0xd4/0x378 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x222/0xa8e drivers/base/dd.c:706 __driver_probe_device+0x1d6/0x43e drivers/base/dd.c:868 driver_probe_device+0x5e/0x162 drivers/base/dd.c:898 __device_attach_driver+0x1c2/0x30a drivers/base/dd.c:1026 bus_for_each_drv+0x142/0x1dc drivers/base/bus.c:500 __device_attach+0x1c4/0x490 drivers/base/dd.c:1098 device_initial_probe+0xb2/0xc8 drivers/base/dd.c:1153 bus_probe_device+0x50/0x146 drivers/base/bus.c:620 device_add+0x1150/0x1880 drivers/base/core.c:3772 usb_new_device+0x8e6/0x169a drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x2c1a/0x4a62 drivers/usb/core/hub.c:5953 process_one_work+0x90a/0x20a0 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x532/0xcaa kernel/workqueue.c:3486 kthread+0x312/0x438 kernel/kthread.c:436 ret_from_fork_kernel+0x94/0xef6 arch/riscv/kernel/process.c:230 ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:368 Freed by task 3943: stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x66 mm/kasan/common.c:57 kasan_save_track+0x16/0x28 mm/kasan/common.c:78 kasan_save_free_info+0x40/0x5a mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5e/0x7e mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2677 [inline] slab_free mm/slub.c:6377 [inline] kfree+0x298/0x76c mm/slub.c:6692 snd_rawmidi_free.part.0+0x328/0x456 sound/core/rawmidi.c:1936 snd_rawmidi_free sound/core/rawmidi.c:1923 [inline] snd_rawmidi_dev_free+0x3e/0x5c sound/core/rawmidi.c:1945 __snd_device_free+0x182/0x3b8 sound/core/device.c:76 snd_device_free_all+0xe0/0x1ec sound/core/device.c:233 snd_card_do_free sound/core/init.c:592 [inline] release_card_device+0x6c/0x1be sound/core/init.c:153 device_release+0xb4/0x24a drivers/base/core.c:2636 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x20a/0x5de lib/kobject.c:737 put_device+0x28/0x3a drivers/base/core.c:3880 snd_card_free_when_closed sound/core/init.c:626 [inline] snd_card_free_when_closed+0x30/0x42 sound/core/init.c:620 usb_audio_disconnect+0x1d8/0x5cc sound/usb/card.c:1159 usb_unbind_interface+0x18a/0x812 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:618 [inline] device_remove+0x11a/0x15c drivers/base/dd.c:610 __device_release_driver drivers/base/dd.c:1349 [inline] device_release_driver_internal+0x3ca/0x554 drivers/base/dd.c:1372 device_release_driver+0x1e/0x28 drivers/base/dd.c:1395 bus_remove_device+0x284/0x518 drivers/base/bus.c:664 device_del+0x312/0x870 drivers/base/core.c:3961 usb_disable_device+0x2d2/0x718 drivers/usb/core/message.c:1478 usb_disconnect+0x27c/0x89e drivers/usb/core/hub.c:2345 hub_quiesce+0x13e/0x2d6 drivers/usb/core/hub.c:1405 hub_disconnect+0xb0/0x48a drivers/usb/core/hub.c:1811 usb_unbind_interface+0x18a/0x812 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:618 [inline] device_remove+0x11a/0x15c drivers/base/dd.c:610 __device_release_driver drivers/base/dd.c:1349 [inline] device_release_driver_internal+0x3ca/0x554 drivers/base/dd.c:1372 device_release_driver+0x1e/0x28 drivers/base/dd.c:1395 usb_driver_release_interface+0x108/0x174 drivers/usb/core/driver.c:640 proc_ioctl+0x546/0x650 drivers/usb/core/devio.c:2359 proc_ioctl_default drivers/usb/core/devio.c:2402 [inline] usbdev_do_ioctl+0x28de/0x5002 drivers/usb/core/devio.c:2766 usbdev_ioctl+0x26/0x34 drivers/usb/core/devio.c:2826 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __riscv_sys_ioctl+0x17c/0x1e2 fs/ioctl.c:583 syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112 do_trap_ecall_u+0x3e4/0x636 arch/riscv/kernel/traps.c:345 handle_exception+0x168/0x174 arch/riscv/kernel/entry.S:237 The buggy address belongs to the object at ffffaf8015390000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 848 bytes inside of freed 4096-byte region [ffffaf8015390000, ffffaf8015391000) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95390 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x40(head|node=0|zone=0) page_type: f5(slab) raw: 0000000000000040 ffffaf8012002140 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800040004 00000000f5000000 0000000000000000 head: 0000000000000040 ffffaf8012002140 dead000000000100 dead000000000122 head: 0000000000000000 0000000800040004 00000000f5000000 0000000000000000 head: 0000000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3285, tgid 3285 (kworker/u8:3), ts 896197643300, free_ts 894561861200 __set_page_owner+0x92/0x4b0 mm/page_owner.c:341 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xe4/0x1a0 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0x914/0x395c mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x224/0x2e40 mm/page_alloc.c:5304 alloc_slab_page mm/slub.c:3266 [inline] allocate_slab mm/slub.c:3380 [inline] new_slab+0x94/0x6be mm/slub.c:3426 refill_objects+0x20a/0x3ba mm/slub.c:7310 refill_sheaf mm/slub.c:2804 [inline] __pcs_replace_empty_main+0x27e/0x5fa mm/slub.c:4675 alloc_from_pcs mm/slub.c:4773 [inline] slab_alloc_node mm/slub.c:4905 [inline] __do_kmalloc_node mm/slub.c:5333 [inline] __kmalloc_node_track_caller_noprof+0x5f0/0x8c0 mm/slub.c:5471 kmalloc_reserve+0xea/0x344 net/core/skbuff.c:637 __alloc_skb+0x1ba/0x768 net/core/skbuff.c:715 alloc_skb include/linux/skbuff.h:1384 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:819 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline] nsim_dev_trap_report_work+0x232/0xbe8 drivers/net/netdevsim/dev.c:922 process_one_work+0x90a/0x20a0 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x532/0xcaa kernel/workqueue.c:3486 kthread+0x312/0x438 kernel/kthread.c:436 ret_from_fork_kernel+0x94/0xef6 arch/riscv/kernel/process.c:230 ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:368 page last free pid 3780 tgid 3780 stack trace: __reset_page_owner+0x76/0x1bc mm/page_owner.c:320 reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0x6b0/0x136c mm/page_alloc.c:2950 free_frozen_pages+0xe/0x16 mm/page_alloc.c:2988 __free_slab+0xda/0x250 mm/slub.c:3441 free_slab+0x28/0x16c mm/slub.c:3475 discard_slab mm/slub.c:3481 [inline] __slab_free+0x23c/0x2f8 mm/slub.c:5741 ___cache_free+0x94/0xac mm/slub.c:6449 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x64/0x134 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x152/0x1b4 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x5c/0x82 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4584 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_noprof+0x202/0x67a mm/slub.c:4931 alloc_filename fs/namei.c:147 [inline] do_getname+0x4c/0x398 fs/namei.c:187 getname_flags+0x22/0x2e fs/namei.c:230 class_filename_flags_constructor include/linux/fs.h:2566 [inline] do_sys_openat2+0xc6/0x1ca fs/open.c:1367 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __riscv_sys_openat+0x122/0x1f2 fs/open.c:1385 syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112 Memory state around the buggy address: ffffaf8015390200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffffaf8015390280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffffaf8015390300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffffaf8015390380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffffaf8015390400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================