usb 1-1: USB disconnect, device number 2
==================================================================
BUG: KASAN: use-after-free in hdm_disconnect+0xf8/0x190 drivers/most/most_usb.c:1125
Read of size 8 at addr ffff0000dced9978 by task kworker/1:0/21
CPU: 1 PID: 21 Comm: kworker/1:0 Not tainted 5.15.165-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: usb_hub_wq hub_event
Call trace:
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x174/0x1e4 mm/kasan/report.c:451
__asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309
hdm_disconnect+0xf8/0x190 drivers/most/most_usb.c:1125
usb_unbind_interface+0x1a4/0x758 drivers/usb/core/driver.c:458
__device_release_driver drivers/base/dd.c:1229 [inline]
device_release_driver_internal+0x464/0x6ac drivers/base/dd.c:1262
device_release_driver+0x28/0x38 drivers/base/dd.c:1285
bus_remove_device+0x298/0x38c drivers/base/bus.c:529
device_del+0x57c/0x9b4 drivers/base/core.c:3603
usb_disable_device+0x354/0x760 drivers/usb/core/message.c:1414
usb_disconnect+0x290/0x7e8 drivers/usb/core/hub.c:2248
hub_port_connect drivers/usb/core/hub.c:5299 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5595 [inline]
port_event drivers/usb/core/hub.c:5741 [inline]
hub_event+0x1718/0x46b8 drivers/usb/core/hub.c:5823
process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
worker_thread+0x910/0x1034 kernel/workqueue.c:2457
kthread+0x37c/0x45c kernel/kthread.c:334
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
Allocated by task 1534:
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_kmalloc+0xbc/0xfc mm/kasan/common.c:513
__kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522
kasan_kmalloc include/linux/kasan.h:264 [inline]
kmem_cache_alloc_trace+0x27c/0x47c mm/slub.c:3247
kmalloc include/linux/slab.h:591 [inline]
kzalloc include/linux/slab.h:721 [inline]
hdm_probe+0xa4/0x1044 drivers/most/most_usb.c:959
usb_probe_interface+0x500/0x984 drivers/usb/core/driver.c:396
really_probe+0x26c/0xaec drivers/base/dd.c:595
__driver_probe_device+0x194/0x3b4 drivers/base/dd.c:755
driver_probe_device+0x78/0x34c drivers/base/dd.c:785
__device_attach_driver+0x28c/0x4d8 drivers/base/dd.c:907
bus_for_each_drv+0x158/0x1e0 drivers/base/bus.c:427
__device_attach+0x2f0/0x480 drivers/base/dd.c:979
device_initial_probe+0x24/0x34 drivers/base/dd.c:1028
bus_probe_device+0xbc/0x1c8 drivers/base/bus.c:487
device_add+0xae0/0xef4 drivers/base/core.c:3415
usb_set_configuration+0x15e0/0x1b60 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x8c/0x148 drivers/usb/core/generic.c:238
usb_probe_device+0x120/0x25c drivers/usb/core/driver.c:293
really_probe+0x26c/0xaec drivers/base/dd.c:595
__driver_probe_device+0x194/0x3b4 drivers/base/dd.c:755
driver_probe_device+0x78/0x34c drivers/base/dd.c:785
__device_attach_driver+0x28c/0x4d8 drivers/base/dd.c:907
bus_for_each_drv+0x158/0x1e0 drivers/base/bus.c:427
__device_attach+0x2f0/0x480 drivers/base/dd.c:979
device_initial_probe+0x24/0x34 drivers/base/dd.c:1028
bus_probe_device+0xbc/0x1c8 drivers/base/bus.c:487
device_add+0xae0/0xef4 drivers/base/core.c:3415
usb_new_device+0x900/0x145c drivers/usb/core/hub.c:2593
hub_port_connect drivers/usb/core/hub.c:5455 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5595 [inline]
port_event drivers/usb/core/hub.c:5741 [inline]
hub_event+0x236c/0x46b8 drivers/usb/core/hub.c:5823
process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
worker_thread+0x910/0x1034 kernel/workqueue.c:2457
kthread+0x37c/0x45c kernel/kthread.c:334
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
Freed by task 21:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4c/0x84 mm/kasan/common.c:46
kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360
____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366
__kasan_slab_free+0x18/0x28 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0x128/0x1ec mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0x178/0x410 mm/slub.c:4559
release_mdev+0x20/0x30 drivers/most/most_usb.c:932
device_release+0x8c/0x1ac
kobject_cleanup lib/kobject.c:713 [inline]
kobject_release lib/kobject.c:744 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x2c4/0x438 lib/kobject.c:761
put_device drivers/base/core.c:3523 [inline]
device_unregister+0x3c/0xcc drivers/base/core.c:3637
most_deregister_interface+0x3e0/0x42c drivers/most/core.c:1402
hdm_disconnect+0xe0/0x190 drivers/most/most_usb.c:1123
usb_unbind_interface+0x1a4/0x758 drivers/usb/core/driver.c:458
__device_release_driver drivers/base/dd.c:1229 [inline]
device_release_driver_internal+0x464/0x6ac drivers/base/dd.c:1262
device_release_driver+0x28/0x38 drivers/base/dd.c:1285
bus_remove_device+0x298/0x38c drivers/base/bus.c:529
device_del+0x57c/0x9b4 drivers/base/core.c:3603
usb_disable_device+0x354/0x760 drivers/usb/core/message.c:1414
usb_disconnect+0x290/0x7e8 drivers/usb/core/hub.c:2248
hub_port_connect drivers/usb/core/hub.c:5299 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5595 [inline]
port_event drivers/usb/core/hub.c:5741 [inline]
hub_event+0x1718/0x46b8 drivers/usb/core/hub.c:5823
process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
worker_thread+0x910/0x1034 kernel/workqueue.c:2457
kthread+0x37c/0x45c kernel/kthread.c:334
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
The buggy address belongs to the object at ffff0000dced8000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 6520 bytes inside of
8192-byte region [ffff0000dced8000, ffff0000dceda000)
The buggy address belongs to the page:
page:00000000b12d2f03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11ced8
head:00000000b12d2f03 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c0002c00
raw: 0000000000000000 0000000080020002 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000dced9800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff0000dced9880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000dced9900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000dced9980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff0000dced9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 21 at lib/refcount.c:28 refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 21 Comm: kworker/1:0 Tainted: G B 5.15.165-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: usb_hub_wq hub_event
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
lr : refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
sp : ffff800018be72f0
x29: ffff800018be72f0 x28: ffff800016a10240 x27: ffff0000d8dec000
x26: 1fffe0001b1bdc07 x25: dfff800000000000 x24: ffff0000d8ded030
x23: 1fffe0001b9db0bb x22: ffff0000d8dee03c x21: 0000000000000003
x20: ffff0000d8dee038 x19: ffff800016f0e000 x18: 0000000000000001
x17: 0000000000000000 x16: ffff800011abb7f8 x15: 00000000ffffffff
x14: ffff0000c0a81b40 x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : d39cb44495939300
x8 : d39cb44495939300 x7 : 0000000000000000 x6 : ffff800011b7ebf4
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80000804605c
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026
Call trace:
refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
kref_put include/linux/kref.h:64 [inline]
kobject_put+0x1a8/0x438 lib/kobject.c:761
put_device+0x28/0x40 drivers/base/core.c:3523
hdm_disconnect+0x170/0x190 drivers/most/most_usb.c:1129
usb_unbind_interface+0x1a4/0x758 drivers/usb/core/driver.c:458
__device_release_driver drivers/base/dd.c:1229 [inline]
device_release_driver_internal+0x464/0x6ac drivers/base/dd.c:1262
device_release_driver+0x28/0x38 drivers/base/dd.c:1285
bus_remove_device+0x298/0x38c drivers/base/bus.c:529
device_del+0x57c/0x9b4 drivers/base/core.c:3603
usb_disable_device+0x354/0x760 drivers/usb/core/message.c:1414
usb_disconnect+0x290/0x7e8 drivers/usb/core/hub.c:2248
hub_port_connect drivers/usb/core/hub.c:5299 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5595 [inline]
port_event drivers/usb/core/hub.c:5741 [inline]
hub_event+0x1718/0x46b8 drivers/usb/core/hub.c:5823
process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
worker_thread+0x910/0x1034 kernel/workqueue.c:2457
kthread+0x37c/0x45c kernel/kthread.c:334
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
irq event stamp: 23204
hardirqs last enabled at (23203): [<ffff8000088d52d4>] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:231
hardirqs last disabled at (23204): [<ffff800011b92b00>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (23204): [<ffff800011b92b00>] _raw_spin_lock_irqsave+0xfc/0x14c kernel/locking/spinlock.c:162
softirqs last enabled at (22614): [<ffff80000a98d520>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (22608): [<ffff80000a98d4ec>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace 24072950f25a4612 ]---
usb 1-1: new high-speed USB device number 3 using dummy_hcd
usb 1-1: Using ep0 maxpacket: 32
usb 1-1: config 0 has an invalid interface number: 237 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=0424, idProduct=cf19, bcdDevice=55.89
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
usb 1-1: config 0 descriptor??
usb 1-1: USB disconnect, device number 3
usb 1-1: new high-speed USB device number 4 using dummy_hcd
usb 1-1: Using ep0 maxpacket: 32
usb 1-1: config 0 has an invalid interface number: 237 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=0424, idProduct=cf19, bcdDevice=55.89
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
usb 1-1: config 0 descriptor??
usb 1-1: USB disconnect, device number 5
usb 1-1: new high-speed USB device number 6 using dummy_hcd
usb 1-1: Using ep0 maxpacket: 32
usb 1-1: config 0 has an invalid interface number: 237 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=0424, idProduct=cf19, bcdDevice=55.89
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
usb 1-1: config 0 descriptor??
usb 1-1: USB disconnect, device number 6
usb 1-1: new high-speed USB device number 7 using dummy_hcd
usb 1-1: Using ep0 maxpacket: 32
usb 1-1: config 0 has an invalid interface number: 237 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=0424, idProduct=cf19, bcdDevice=55.89
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
usb 1-1: config 0 descriptor??
usb 1-1: USB disconnect, device number 7
usb 1-1: new high-speed USB device number 8 using dummy_hcd
usb 1-1: Using ep0 maxpacket: 32
usb 1-1: config 0 has an invalid interface number: 237 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=0424, idProduct=cf19, bcdDevice=55.89
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
usb 1-1: config 0 descriptor??
usb 1-1: USB disconnect, device number 8
usb 1-1: new high-speed USB device number 9 using dummy_hcd
usb 1-1: Using ep0 maxpacket: 32
usb 1-1: config 0 has an invalid interface number: 237 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=0424, idProduct=cf19, bcdDevice=55.89
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
usb 1-1: config 0 descriptor??
usb 1-1: USB disconnect, device number 9
usb 1-1: new high-speed USB device number 10 using dummy_hcd
usb 1-1: Using ep0 maxpacket: 32
usb 1-1: config 0 has an invalid interface number: 237 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=0424, idProduct=cf19, bcdDevice=55.89
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
usb 1-1: config 0 descriptor??
usb 1-1: USB disconnect, device number 10
usb 1-1: new high-speed USB device number 11 using dummy_hcd