KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb

Status: upstream: reported on 2025/07/10 08:57
Reported-by: syzbot+4aedd796659b42864ece@syzkaller.appspotmail.com
First crash: 491d, last: 19m
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb usb 19 1 1181d 1180d 0/29 auto-obsoleted due to no activity on 2023/11/28 05:12
upstream KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb (2) prio:high usb 22 384 2d21h 966d 0/29 upstream: reported on 2024/03/22 17:26
linux-5.15 KASAN: use-after-free Read in __usb_hcd_giveback_urb 19 39 509d 1098d 0/3 auto-obsoleted due to no activity on 2025/09/30 06:38
upstream KASAN: use-after-free Read in __usb_hcd_giveback_urb (2) usb 19 1 1442d 1438d 0/29 auto-obsoleted due to no activity on 2023/03/31 19:51
linux-5.15 KASAN: use-after-free Read in __usb_hcd_giveback_urb (2) 19 49 10h48m 391d 0/3 upstream: reported on 2025/10/17 22:12
linux-6.1 KASAN: use-after-free Read in __usb_hcd_giveback_urb 19 syz error 44 16d 951d 0/3 upstream: reported syz repro on 2024/04/06 03:35

Sample crash report:
xpad 5-1:179.65: xpad_irq_in - usb_submit_urb failed with result -19
xpad 5-1:179.65: xpad_irq_out - usb_submit_urb failed with result -19
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x25d/0x2b0 kernel/locking/spinlock_debug.c:114
Read of size 4 at addr ffff888066bd885c by task ksoftirqd/0/16

CPU: 0 PID: 16 Comm: ksoftirqd/0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xa8/0x210 mm/kasan/report.c:468
 kasan_report+0x117/0x150 mm/kasan/report.c:581
 debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
 do_raw_spin_lock+0x25d/0x2b0 kernel/locking/spinlock_debug.c:114
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
 _raw_spin_lock_irqsave+0xc0/0x100 kernel/locking/spinlock.c:162
 __wake_up_common_lock kernel/sched/wait.c:137 [inline]
 __wake_up+0x10b/0x1a0 kernel/sched/wait.c:160
 __usb_hcd_giveback_urb+0x394/0x520 drivers/usb/core/hcd.c:1653
 dummy_timer+0xa55/0x35d0 drivers/usb/gadget/udc/dummy_hcd.c:2021
 __run_hrtimer kernel/time/hrtimer.c:1754 [inline]
 __hrtimer_run_queues+0x525/0xc10 kernel/time/hrtimer.c:1818
 hrtimer_run_softirq+0x177/0x290 kernel/time/hrtimer.c:1835
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 run_ksoftirqd+0xa8/0x100 kernel/softirq.c:950
 smpboot_thread_fn+0x651/0x9f0 kernel/smpboot.c:164
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>

Allocated by task 9665:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 xpad_probe+0x434/0x1e70 drivers/input/joystick/xpad.c:2094
 usb_probe_interface+0x6eb/0xcf0 drivers/usb/core/driver.c:395
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x24a/0xae0 drivers/base/dd.c:717
 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:879
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:909
 __device_attach_driver+0x2ca/0x510 drivers/base/dd.c:1037
 bus_for_each_drv+0x252/0x2e0 drivers/base/bus.c:459
 __device_attach+0x2c1/0x420 drivers/base/dd.c:1109
 bus_probe_device+0x180/0x260 drivers/base/bus.c:580
 device_add+0x87c/0xc40 drivers/base/core.c:3768
 usb_set_configuration+0x1bad/0x2220 drivers/usb/core/message.c:2271
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x12a/0x260 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x24a/0xae0 drivers/base/dd.c:717
 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:879
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:909
 __device_attach_driver+0x2ca/0x510 drivers/base/dd.c:1037
 bus_for_each_drv+0x252/0x2e0 drivers/base/bus.c:459
 __device_attach+0x2c1/0x420 drivers/base/dd.c:1109
 bus_probe_device+0x180/0x260 drivers/base/bus.c:580
 device_add+0x87c/0xc40 drivers/base/core.c:3768
 usb_new_device+0x995/0x1550 drivers/usb/core/hub.c:2670
 hub_port_connect drivers/usb/core/hub.c:5539 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5679 [inline]
 port_event drivers/usb/core/hub.c:5843 [inline]
 hub_event+0x29d5/0x4a80 drivers/usb/core/hub.c:5925
 process_one_work kernel/workqueue.c:2657 [inline]
 process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293

Freed by task 10434:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
 ____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
 kasan_slab_free include/linux/kasan.h:164 [inline]
 slab_free_hook mm/slub.c:1833 [inline]
 slab_free_freelist_hook+0x154/0x240 mm/slub.c:1859
 slab_free mm/slub.c:3853 [inline]
 __kmem_cache_free+0xba/0x1f0 mm/slub.c:3866
 xpad_disconnect+0x323/0x440 drivers/input/joystick/xpad.c:2275
 usb_unbind_interface+0x204/0x870 drivers/usb/core/driver.c:457
 device_remove drivers/base/dd.c:628 [inline]
 __device_release_driver drivers/base/dd.c:1351 [inline]
 device_release_driver_internal+0x458/0x6f0 drivers/base/dd.c:1374
 bus_remove_device+0x43b/0x520 drivers/base/bus.c:624
 device_del+0x51f/0x910 drivers/base/core.c:3957
 usb_disable_device+0x3ee/0x8a0 drivers/usb/core/message.c:1480
 usb_disconnect+0x340/0x8a0 drivers/usb/core/hub.c:2325
 hub_port_connect drivers/usb/core/hub.c:5379 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5679 [inline]
 port_event drivers/usb/core/hub.c:5843 [inline]
 hub_event+0x1d69/0x4a80 drivers/usb/core/hub.c:5925
 process_one_work kernel/workqueue.c:2657 [inline]
 process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293

The buggy address belongs to the object at ffff888066bd8800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 92 bytes inside of
 freed 1024-byte region [ffff888066bd8800, ffff888066bd8c00)

The buggy address belongs to the physical page:
page:ffffea00019af600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x66bd8
head:ffffea00019af600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888018c41dc0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000100010 00000001ffffffff 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 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 6505, tgid 6505 (kworker/u4:11), ts 691190210974, free_ts 688352183084
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1582
 prep_new_page mm/page_alloc.c:1589 [inline]
 get_page_from_freelist+0x2181/0x22a0 mm/page_alloc.c:3221
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4501
 alloc_slab_page+0x5d/0x180 mm/slub.c:1903
 allocate_slab mm/slub.c:2050 [inline]
 new_slab+0x87/0x2d0 mm/slub.c:2103
 ___slab_alloc+0xc5c/0x12f0 mm/slub.c:3275
 __slab_alloc mm/slub.c:3361 [inline]
 __slab_alloc_node mm/slub.c:3414 [inline]
 slab_alloc_node mm/slub.c:3508 [inline]
 __kmem_cache_alloc_node+0x122/0x260 mm/slub.c:3557
 __do_kmalloc_node mm/slab_common.c:1006 [inline]
 __kmalloc+0xa7/0x240 mm/slab_common.c:1020
 kmalloc include/linux/slab.h:604 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 ieee802_11_parse_elems_full+0xb9/0x20f0 net/mac80211/util.c:1616
 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2342 [inline]
 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2349 [inline]
 ieee80211_inform_bss+0x12a/0xfd0 net/mac80211/scan.c:79
 rdev_inform_bss+0x106/0x410 net/wireless/rdev-ops.h:418
 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:3005 [inline]
 cfg80211_inform_bss_frame_data+0xb22/0x1330 net/wireless/scan.c:3032
 ieee80211_bss_info_update+0x789/0x9f0 net/mac80211/scan.c:211
 ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1612 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x18f5/0x2dc0 net/mac80211/ibss.c:1641
 ieee80211_iface_process_skb net/mac80211/iface.c:1690 [inline]
 ieee80211_iface_work+0x730/0xc90 net/mac80211/iface.c:1744
 cfg80211_wiphy_work+0x228/0x260 net/wireless/core.c:444
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1182 [inline]
 free_unref_page_prepare+0x7d7/0x8f0 mm/page_alloc.c:2366
 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2459
 discard_slab mm/slub.c:2149 [inline]
 __unfreeze_partials+0x1cf/0x210 mm/slub.c:2689
 put_cpu_partial+0x17c/0x250 mm/slub.c:2765
 __slab_free+0x319/0x400 mm/slub.c:3723
 qlink_free mm/kasan/quarantine.c:166 [inline]
 qlist_free_all+0x75/0xd0 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:306
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x6a/0x4d0 mm/slab.h:770
 slab_alloc_node mm/slub.c:3518 [inline]
 __kmem_cache_alloc_node+0x197/0x260 mm/slub.c:3557
 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 tomoyo_dump_page+0xe9/0x670 security/tomoyo/domain.c:908
 tomoyo_scan_bprm security/tomoyo/condition.c:130 [inline]
 tomoyo_condition+0x25dc/0x32f0 security/tomoyo/condition.c:1120
 tomoyo_check_acl+0x17b/0x3f0 security/tomoyo/domain.c:177
 tomoyo_execute_permission+0x123/0x400 security/tomoyo/file.c:615
 tomoyo_find_next_domain+0x448/0x1a50 security/tomoyo/domain.c:755

Memory state around the buggy address:
 ffff888066bd8700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888066bd8780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888066bd8800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff888066bd8880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888066bd8900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (24):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/11/13 17:12 linux-6.6.y 5139929c698c be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/09/01 06:06 linux-6.6.y a4a971135a2f 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/07/30 12:35 linux-6.6.y a1153c0deb44 2377cd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/07/18 21:10 linux-6.6.y da47cbc25466 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/06/26 19:05 linux-6.6.y d1cfde2d5d15 fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/05/21 00:55 linux-6.6.y eac8889a3a1c 41b8c833 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/05/12 09:08 linux-6.6.y 3b9f64db0496 07aeade5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/05/09 03:01 linux-6.6.y 3b9f64db0496 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/02/25 07:38 linux-6.6.y 7a137e9bfa0e 787dfb7c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/02/23 13:53 linux-6.6.y 7a137e9bfa0e 6beca497 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/01/30 15:07 linux-6.6.y 2cf6f68313dc ae7dc18c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/01/28 04:03 linux-6.6.y cbb31f77b879 3029c699 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/01/19 12:03 linux-6.6.y cbb31f77b879 a9fc5226 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2026/01/04 22:20 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2025/11/17 15:49 linux-6.6.y 0a805b6ea8cd ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2025/11/15 19:10 linux-6.6.y 0a805b6ea8cd f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2025/10/23 21:58 linux-6.6.y 4a243110dc88 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2025/09/24 08:09 linux-6.6.y af1544b5d072 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2025/09/11 19:49 linux-6.6.y 60a9e718726f e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2025/08/29 23:18 linux-6.6.y cc1a1c5b404a 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2025/08/08 02:24 linux-6.6.y 3a8ababb8b6a 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2025/07/24 01:08 linux-6.6.y d96eb99e2f0e 0c1d6ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2025/07/14 21:46 linux-6.6.y 9247f4e6573a d8fc7335 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
2025/07/10 08:56 linux-6.6.y a5df3a702b2c 956bd956 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan KASAN: slab-use-after-free Read in __usb_hcd_giveback_urb
* Struck through repros no longer work on HEAD.