usb 5-1: Using ep0 maxpacket: 16
usb 5-1: config 58 has an invalid interface number: 42 but max is 2
usb 5-1: config 58 has an invalid interface number: 146 but max is 2
usb 5-1: config 58 contains an unexpected descriptor of type 0x1, skipping
usb 5-1: config 58 contains an unexpected descriptor of type 0x1, skipping
usb 5-1: config 58 has 2 interfaces, different from the descriptor's value: 3
usb 5-1: config 58 has no interface number 0
usb 5-1: config 58 has no interface number 1
usb 5-1: config 58 interface 42 altsetting 8 endpoint 0xC has invalid maxpacket 1024, setting to 64
usb 5-1: config 58 interface 42 altsetting 8 has an invalid descriptor for endpoint zero, skipping
usb 5-1: config 58 interface 42 altsetting 8 has an invalid descriptor for endpoint zero, skipping
usb 5-1: config 58 interface 42 altsetting 8 endpoint 0xF has invalid maxpacket 1024, setting to 64
usb 5-1: config 58 interface 42 altsetting 8 endpoint 0x7 has invalid maxpacket 1024, setting to 64
usb 5-1: config 58 interface 42 altsetting 8 endpoint 0x3 has invalid maxpacket 1023, setting to 64
usb 5-1: config 58 interface 42 altsetting 8 endpoint 0x1 has invalid maxpacket 1040, setting to 64
usb 5-1: config 58 interface 42 altsetting 8 has a duplicate endpoint with address 0x1, skipping
usb 5-1: config 58 interface 42 altsetting 8 has a duplicate endpoint with address 0x3, skipping
usb 5-1: config 58 interface 42 altsetting 8 has an invalid descriptor for endpoint zero, skipping
usb 5-1: config 58 interface 42 altsetting 8 endpoint 0x8 has invalid maxpacket 1023, setting to 64
usb 5-1: config 58 interface 42 altsetting 8 has a duplicate endpoint with address 0xF, skipping
usb 5-1: config 58 interface 42 altsetting 8 has a duplicate endpoint with address 0x1, skipping
usb 5-1: config 58 interface 42 altsetting 8 has a duplicate endpoint with address 0xF, skipping
usb 5-1: too many endpoints for config 58 interface 146 altsetting 1: 197, using maximum allowed: 30
usb 5-1: config 58 interface 146 altsetting 1 has a duplicate endpoint with address 0x9, skipping
usb 5-1: config 58 interface 146 altsetting 1 has a duplicate endpoint with address 0xC, skipping
usb 5-1: config 58 interface 146 altsetting 1 has a duplicate endpoint with address 0x8, skipping
usb 5-1: config 58 interface 146 altsetting 1 has an invalid descriptor for endpoint zero, skipping
usb 5-1: config 58 interface 146 altsetting 1 has an invalid descriptor for endpoint zero, skipping
usb 5-1: config 58 interface 146 altsetting 1 has an invalid descriptor for endpoint zero, skipping
usb 5-1: config 58 interface 146 altsetting 1 endpoint 0xA has invalid maxpacket 512, setting to 64
usb 5-1: config 58 interface 146 altsetting 1 has a duplicate endpoint with address 0x8, skipping
usb 5-1: config 58 interface 146 altsetting 1 has an endpoint descriptor with address 0x1B, changing to 0xB
usb 5-1: config 58 interface 146 altsetting 1 endpoint 0xB has invalid maxpacket 43539, setting to 1024
usb 5-1: config 58 interface 146 altsetting 1 bulk endpoint 0xB has invalid maxpacket 1024
usb 5-1: config 58 interface 146 altsetting 1 has a duplicate endpoint with address 0x3, skipping
usb 5-1: config 58 interface 146 altsetting 1 has a duplicate endpoint with address 0x9, skipping
usb 5-1: config 58 interface 146 altsetting 1 endpoint 0x85 has invalid maxpacket 512, setting to 64
usb 5-1: config 58 interface 146 altsetting 1 has a duplicate endpoint with address 0xA, skipping
usb 5-1: config 58 interface 146 altsetting 1 has a duplicate endpoint with address 0x3, skipping
usb 5-1: config 58 interface 146 altsetting 1 endpoint 0x2 has invalid maxpacket 1023, setting to 64
usb 5-1: config 58 interface 146 altsetting 1 has 15 endpoint descriptors, different from the interface descriptor's value: 197
usb 5-1: config 58 interface 42 has no altsetting 0
usb 5-1: config 58 interface 146 has no altsetting 0
usb 5-1: New USB device found, idVendor=0424, idProduct=cf18, bcdDevice=a8.30
usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 5-1: Product: syz
usb 5-1: Manufacturer: syz
usb 5-1: SerialNumber: syz
usb 5-1: USB disconnect, device number 2
==================================================================
BUG: KASAN: slab-use-after-free in hdm_disconnect+0x10d/0x1c0 drivers/most/most_usb.c:1125
Read of size 8 at addr ffff8880442f9898 by task kworker/0:5/5314

CPU: 0 UID: 0 PID: 5314 Comm: kworker/0:5 Not tainted 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 hdm_disconnect+0x10d/0x1c0 drivers/most/most_usb.c:1125
 usb_unbind_interface+0x25b/0x940 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1273 [inline]
 device_release_driver_internal+0x503/0x7c0 drivers/base/dd.c:1296
 bus_remove_device+0x34f/0x420 drivers/base/bus.c:576
 device_del+0x57a/0x9b0 drivers/base/core.c:3854
 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1418
 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2304
 hub_port_connect drivers/usb/core/hub.c:5361 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
 port_event drivers/usb/core/hub.c:5821 [inline]
 hub_event+0x1ebc/0x5150 drivers/usb/core/hub.c:5903
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 5314:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4329
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 hdm_probe+0x98/0x13e0 drivers/most/most_usb.c:959
 usb_probe_interface+0x641/0xbb0 drivers/usb/core/driver.c:396
 really_probe+0x2b8/0xad0 drivers/base/dd.c:658
 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
 driver_probe_device+0x50/0x430 drivers/base/dd.c:830
 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:459
 __device_attach+0x333/0x520 drivers/base/dd.c:1030
 bus_probe_device+0x189/0x260 drivers/base/bus.c:534
 device_add+0x856/0xbf0 drivers/base/core.c:3665
 usb_set_configuration+0x1976/0x1fb0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x88/0x140 drivers/usb/core/generic.c:254
 usb_probe_device+0x1b8/0x380 drivers/usb/core/driver.c:291
 really_probe+0x2b8/0xad0 drivers/base/dd.c:658
 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
 driver_probe_device+0x50/0x430 drivers/base/dd.c:830
 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:459
 __device_attach+0x333/0x520 drivers/base/dd.c:1030
 bus_probe_device+0x189/0x260 drivers/base/bus.c:534
 device_add+0x856/0xbf0 drivers/base/core.c:3665
 usb_new_device+0x104a/0x19a0 drivers/usb/core/hub.c:2651
 hub_port_connect drivers/usb/core/hub.c:5521 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
 port_event drivers/usb/core/hub.c:5821 [inline]
 hub_event+0x2d6d/0x5150 drivers/usb/core/hub.c:5903
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 5314:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2353 [inline]
 slab_free mm/slub.c:4613 [inline]
 kfree+0x196/0x430 mm/slub.c:4761
 device_release+0x99/0x1c0
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x22f/0x480 lib/kobject.c:737
 hdm_disconnect+0xf3/0x1c0 drivers/most/most_usb.c:1123
 usb_unbind_interface+0x25b/0x940 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1273 [inline]
 device_release_driver_internal+0x503/0x7c0 drivers/base/dd.c:1296
 bus_remove_device+0x34f/0x420 drivers/base/bus.c:576
 device_del+0x57a/0x9b0 drivers/base/core.c:3854
 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1418
 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2304
 hub_port_connect drivers/usb/core/hub.c:5361 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
 port_event drivers/usb/core/hub.c:5821 [inline]
 hub_event+0x1ebc/0x5150 drivers/usb/core/hub.c:5903
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff8880442f8000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 6296 bytes inside of
 freed 8192-byte region [ffff8880442f8000, ffff8880442fa000)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x442f8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000040 ffff88801ac42280 ffffea0000cc1600 0000000000000002
raw: 0000000000000000 0000000000020002 00000001f5000000 0000000000000000
head: 04fff00000000040 ffff88801ac42280 ffffea0000cc1600 0000000000000002
head: 0000000000000000 0000000000020002 00000001f5000000 0000000000000000
head: 04fff00000000003 ffffea000110be01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5289, tgid 5289 (nohup), ts 55491583480, free_ts 55491165708
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
 prep_new_page mm/page_alloc.c:1564 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3474
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269
 alloc_slab_page+0x6a/0x110 mm/slub.c:2423
 allocate_slab+0x5a/0x2b0 mm/slub.c:2589
 new_slab mm/slub.c:2642 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3830
 __slab_alloc+0x58/0xa0 mm/slub.c:3920
 __slab_alloc_node mm/slub.c:3995 [inline]
 slab_alloc_node mm/slub.c:4156 [inline]
 __kmalloc_cache_noprof+0x27b/0x390 mm/slub.c:4324
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 tomoyo_print_bprm security/tomoyo/audit.c:26 [inline]
 tomoyo_init_log+0x11cd/0x2050 security/tomoyo/audit.c:264
 tomoyo_supervisor+0x38a/0x11f0 security/tomoyo/common.c:2089
 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline]
 tomoyo_env_perm+0x178/0x210 security/tomoyo/environ.c:63
 tomoyo_environ security/tomoyo/domain.c:672 [inline]
 tomoyo_find_next_domain+0x146e/0x1d40 security/tomoyo/domain.c:881
 tomoyo_bprm_check_security+0x117/0x180 security/tomoyo/tomoyo.c:102
 security_bprm_check+0x86/0x250 security/security.c:1296
 search_binary_handler fs/exec.c:1736 [inline]
 exec_binprm fs/exec.c:1790 [inline]
 bprm_execve+0xa53/0x17a0 fs/exec.c:1842
page last free pid 5289 tgid 5289 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2657
 discard_slab mm/slub.c:2688 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3157
 put_cpu_partial+0x17c/0x250 mm/slub.c:3232
 __slab_free+0x290/0x380 mm/slub.c:4483
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4119 [inline]
 slab_alloc_node mm/slub.c:4168 [inline]
 __do_kmalloc_node mm/slub.c:4297 [inline]
 __kmalloc_noprof+0x236/0x4c0 mm/slub.c:4310
 kmalloc_noprof include/linux/slab.h:905 [inline]
 tomoyo_add_entry security/tomoyo/common.c:2023 [inline]
 tomoyo_supervisor+0xe0d/0x11f0 security/tomoyo/common.c:2095
 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline]
 tomoyo_env_perm+0x178/0x210 security/tomoyo/environ.c:63
 tomoyo_environ security/tomoyo/domain.c:672 [inline]
 tomoyo_find_next_domain+0x146e/0x1d40 security/tomoyo/domain.c:881
 tomoyo_bprm_check_security+0x117/0x180 security/tomoyo/tomoyo.c:102
 security_bprm_check+0x86/0x250 security/security.c:1296
 search_binary_handler fs/exec.c:1736 [inline]
 exec_binprm fs/exec.c:1790 [inline]
 bprm_execve+0xa53/0x17a0 fs/exec.c:1842
 do_execveat_common+0x55f/0x6f0 fs/exec.c:1949
 do_execve fs/exec.c:2023 [inline]
 __do_sys_execve fs/exec.c:2099 [inline]
 __se_sys_execve fs/exec.c:2094 [inline]
 __x64_sys_execve+0x92/0xb0 fs/exec.c:2094

Memory state around the buggy address:
 ffff8880442f9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880442f9800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880442f9880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff8880442f9900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880442f9980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================