==================================================================
BUG: KASAN: use-after-free in memcmp lib/string.c:942 [inline]
BUG: KASAN: use-after-free in bcmp+0xad/0xd0 lib/string.c:964
Read of size 1 at addr ffff8881047f1d62 by task kworker/1:1/25

CPU: 1 PID: 25 Comm: kworker/1:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306
 memcmp lib/string.c:942 [inline]
 bcmp+0xad/0xd0 lib/string.c:964
 sony_check_add_dev_list drivers/hid/hid-sony.c:2403 [inline]
 sony_check_add drivers/hid/hid-sony.c:2534 [inline]
 sony_input_configured+0x6a0/0x3980 drivers/hid/hid-sony.c:2613
 hidinput_connect+0x1e7b/0x2bf0 drivers/hid/hid-input.c:1983
 hid_connect+0x479/0xe30 drivers/hid/hid-core.c:2021
 hid_hw_start+0xaa/0x130 drivers/hid/hid-core.c:2128
 sony_probe+0x20a/0x330 drivers/hid/hid-sony.c:2885
 hid_device_probe+0x28d/0x390 drivers/hid/hid-core.c:2363
 really_probe+0x373/0xa60 drivers/base/dd.c:558
 driver_probe_device+0xe1/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:433
 __device_attach+0x2a8/0x410 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8ce/0xc00 drivers/base/core.c:3273
 hid_add_device+0x349/0x4b0 drivers/hid/hid-core.c:2515
 usbhid_probe+0xb93/0xf30 drivers/hid/usbhid/hid-core.c:1436
 usb_probe_interface+0x60f/0xb20 drivers/usb/core/driver.c:397
 really_probe+0x3bf/0xa60 drivers/base/dd.c:562
 driver_probe_device+0xe1/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:433
 __device_attach+0x2a8/0x410 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8ce/0xc00 drivers/base/core.c:3273
 usb_set_configuration+0x1a76/0x1fe0 drivers/usb/core/message.c:2219
 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x143/0x250 drivers/usb/core/driver.c:294
 really_probe+0x3bf/0xa60 drivers/base/dd.c:562
 driver_probe_device+0xe1/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:433
 __device_attach+0x2a8/0x410 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8ce/0xc00 drivers/base/core.c:3273
 usb_new_device+0x9ba/0x1460 drivers/usb/core/hub.c:2659
 hub_port_connect drivers/usb/core/hub.c:5504 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5644 [inline]
 port_event drivers/usb/core/hub.c:5810 [inline]
 hub_event+0x2790/0x4220 drivers/usb/core/hub.c:5892
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Allocated by task 0:
(stack is not available)

Freed by task 25:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kfree+0xc0/0x270 mm/slub.c:4196
 release_nodes+0x7ca/0x840 drivers/base/devres.c:524
 devres_release_all+0x7c/0xa0 drivers/base/devres.c:545
 really_probe+0x447/0xa60 drivers/base/dd.c:630
 driver_probe_device+0xe1/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:433
 __device_attach+0x2a8/0x410 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8ce/0xc00 drivers/base/core.c:3273
 hid_add_device+0x349/0x4b0 drivers/hid/hid-core.c:2515
 usbhid_probe+0xb93/0xf30 drivers/hid/usbhid/hid-core.c:1436
 usb_probe_interface+0x60f/0xb20 drivers/usb/core/driver.c:397
 really_probe+0x3bf/0xa60 drivers/base/dd.c:562
 driver_probe_device+0xe1/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:433
 __device_attach+0x2a8/0x410 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8ce/0xc00 drivers/base/core.c:3273
 usb_set_configuration+0x1a76/0x1fe0 drivers/usb/core/message.c:2219
 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x143/0x250 drivers/usb/core/driver.c:294
 really_probe+0x3bf/0xa60 drivers/base/dd.c:562
 driver_probe_device+0xe1/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:433
 __device_attach+0x2a8/0x410 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8ce/0xc00 drivers/base/core.c:3273
 usb_new_device+0x9ba/0x1460 drivers/usb/core/hub.c:2659
 hub_port_connect drivers/usb/core/hub.c:5504 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5644 [inline]
 port_event drivers/usb/core/hub.c:5810 [inline]
 hub_event+0x2790/0x4220 drivers/usb/core/hub.c:5892
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff8881047f1c00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 354 bytes inside of
 512-byte region [ffff8881047f1c00, ffff8881047f1e00)
The buggy address belongs to the page:
page:ffffea000411fc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1047f0
head:ffffea000411fc00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 293, ts 20140024903, free_ts 17218748334
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 __kmalloc_track_caller+0x1e4/0x310 mm/slub.c:4541
 __kmalloc_reserve net/core/skbuff.c:144 [inline]
 __alloc_skb+0xdc/0x520 net/core/skbuff.c:212
 alloc_skb include/linux/skbuff.h:1126 [inline]
 alloc_skb_with_frags+0xa3/0x560 net/core/skbuff.c:6058
 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2392
 unix_stream_sendmsg+0x4c9/0xbe0 net/unix/af_unix.c:1924
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 sock_write_iter+0x2a6/0x3a0 net/socket.c:1019
 call_write_iter include/linux/fs.h:2072 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x770/0xd70 fs/read_write.c:605
 ksys_write+0x14a/0x260 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 __free_pages_ok+0x80b/0x830 mm/page_alloc.c:1629
 free_the_page mm/page_alloc.c:5445 [inline]
 __free_pages+0xd8/0x390 mm/page_alloc.c:5454
 __free_slab+0xcf/0x190 mm/slub.c:1899
 free_slab mm/slub.c:1914 [inline]
 discard_slab mm/slub.c:1920 [inline]
 unfreeze_partials+0x150/0x180 mm/slub.c:2415
 put_cpu_partial+0xc1/0x180 mm/slub.c:2451
 __slab_free+0x2c9/0x3a0 mm/slub.c:3100
 do_slab_free mm/slub.c:3196 [inline]
 ___cache_free+0x10e/0x130 mm/slub.c:3215
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x15a/0x2d0 mm/slub.c:2965
 kmem_cache_alloc_node include/linux/slab.h:426 [inline]
 __alloc_skb+0x9e/0x520 net/core/skbuff.c:200
 alloc_skb include/linux/skbuff.h:1126 [inline]
 alloc_skb_with_frags+0xa3/0x560 net/core/skbuff.c:6058
 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2392

Memory state around the buggy address:
 ffff8881047f1c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881047f1c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881047f1d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff8881047f1d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881047f1e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
sony 0003:054C:042F.0002: can't set operational mode: step 3, ignoring
sony 0003:054C:042F.0002: No inputs registered, leaving
sony 0003:054C:042F.0002: hidraw0: USB HID v0.00 Joystick [HID 054c:042f] on usb-dummy_hcd.0-1/input0
sony 0003:054C:042F.0002: failed to claim input
usb 1-1: USB disconnect, device number 3
usb 1-1: new high-speed USB device number 4 using dummy_hcd
usb 1-1: config 0 interface 0 altsetting 12 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 1-1: config 0 interface 0 altsetting 12 endpoint 0x81 has invalid wMaxPacketSize 0
usb 1-1: config 0 interface 0 altsetting 12 has 1 endpoint descriptor, different from the interface descriptor's value: 2
usb 1-1: config 0 interface 0 has no altsetting 0
usb 1-1: New USB device found, idVendor=054c, idProduct=042f, bcdDevice= 0.00
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
sony 0003:054C:042F.0003: can't set operational mode: step 3, ignoring
sony 0003:054C:042F.0003: No inputs registered, leaving
sony 0003:054C:042F.0003: hidraw0: USB HID v0.00 Joystick [HID 054c:042f] on usb-dummy_hcd.0-1/input0
sony 0003:054C:042F.0003: failed to claim input
usb 1-1: USB disconnect, device number 4
usb 1-1: new high-speed USB device number 5 using dummy_hcd
usb 1-1: config 0 interface 0 altsetting 12 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 1-1: config 0 interface 0 altsetting 12 endpoint 0x81 has invalid wMaxPacketSize 0
usb 1-1: config 0 interface 0 altsetting 12 has 1 endpoint descriptor, different from the interface descriptor's value: 2
usb 1-1: config 0 interface 0 has no altsetting 0
usb 1-1: New USB device found, idVendor=054c, idProduct=042f, bcdDevice= 0.00
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
sony 0003:054C:042F.0004: can't set operational mode: step 3, ignoring
sony 0003:054C:042F.0004: No inputs registered, leaving
sony 0003:054C:042F.0004: hidraw0: USB HID v0.00 Joystick [HID 054c:042f] on usb-dummy_hcd.0-1/input0
sony 0003:054C:042F.0004: failed to claim input
usb 1-1: USB disconnect, device number 5
usb 1-1: new high-speed USB device number 6 using dummy_hcd
usb 1-1: config 0 interface 0 altsetting 12 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 1-1: config 0 interface 0 altsetting 12 endpoint 0x81 has invalid wMaxPacketSize 0
usb 1-1: config 0 interface 0 altsetting 12 has 1 endpoint descriptor, different from the interface descriptor's value: 2
usb 1-1: config 0 interface 0 has no altsetting 0
usb 1-1: New USB device found, idVendor=054c, idProduct=042f, bcdDevice= 0.00
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
sony 0003:054C:042F.0005: can't set operational mode: step 3, ignoring
sony 0003:054C:042F.0005: No inputs registered, leaving
sony 0003:054C:042F.0005: hidraw0: USB HID v0.00 Joystick [HID 054c:042f] on usb-dummy_hcd.0-1/input0
sony 0003:054C:042F.0005: failed to claim input
usb 1-1: USB disconnect, device number 6
usb 1-1: new high-speed USB device number 7 using dummy_hcd
usb 1-1: config 0 interface 0 altsetting 12 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 1-1: config 0 interface 0 altsetting 12 endpoint 0x81 has invalid wMaxPacketSize 0
usb 1-1: config 0 interface 0 altsetting 12 has 1 endpoint descriptor, different from the interface descriptor's value: 2
usb 1-1: config 0 interface 0 has no altsetting 0
usb 1-1: New USB device found, idVendor=054c, idProduct=042f, bcdDevice= 0.00
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
sony 0003:054C:042F.0006: can't set operational mode: step 3, ignoring
sony 0003:054C:042F.0006: No inputs registered, leaving
sony 0003:054C:042F.0006: hidraw0: USB HID v0.00 Joystick [HID 054c:042f] on usb-dummy_hcd.0-1/input0
sony 0003:054C:042F.0006: failed to claim input