usbtmc 5-1:16.0: usbtmc_read_bulk_cb - nonzero read bulk status received: -71
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline]
BUG: KASAN: slab-use-after-free in usb_anchor_suspend_wakeups+0x28/0x50 drivers/usb/core/urb.c:910
Write of size 4 at addr ffff888066c47110 by task syz.4.4624/24167
CPU: 1 UID: 0 PID: 24167 Comm: syz.4.4624 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline]
usb_anchor_suspend_wakeups+0x28/0x50 drivers/usb/core/urb.c:910
__usb_hcd_giveback_urb+0x260/0x540 drivers/usb/core/hcd.c:1648
dummy_timer+0x85f/0x44c0 drivers/usb/gadget/udc/dummy_hcd.c:1995
__run_hrtimer kernel/time/hrtimer.c:1777 [inline]
__hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1841
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1858
handle_softirqs+0x286/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__futex_hash_private kernel/futex/core.c:190 [inline]
RIP: 0010:__futex_hash+0x3bd/0x760 kernel/futex/core.c:423
Code: 08 4c 89 ff e8 64 8a 72 00 41 be e0 02 00 00 4d 03 37 4c 89 f0 48 c1 e8 03 80 3c 28 00 74 08 4c 89 f7 e8 46 8a 72 00 4d 8b 36 fe ae 98 09 41 89 c5 31 ff 89 c6 e8 52 de 0c 00 45 85 ed 74 21
RSP: 0018:ffffc9000e677b50 EFLAGS: 00000246
RAX: 1ffff1100500c9c4 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: ffff888033f53c80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff81b36370
R10: ffffc9000e677c40 R11: fffff52001ccef8b R12: 1ffff92001ccef8a
R13: 0000000000000000 R14: ffff888048ab8000 R15: ffffc9000e677c40
futex_hash+0xe5/0x2d0 kernel/futex/core.c:309
class_hb_constructor kernel/futex/futex.h:240 [inline]
futex_wake+0x161/0x560 kernel/futex/waitwake.c:172
do_futex+0x395/0x420 kernel/futex/syscalls.c:135
__do_sys_futex kernel/futex/syscalls.c:207 [inline]
__se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:188
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f20f858eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f20f947a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f20f87e5fa8 RCX: 00007f20f858eec9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f20f87e5fac
RBP: 00007f20f87e5fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f20f87e6038 R14: 00007f20f890f940 R15: 00007f20f890fa28
Allocated by task 24167:
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
poison_kmalloc_redzone mm/kasan/common.c:400 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:417
kasan_kmalloc include/linux/kasan.h:262 [inline]
__kmalloc_cache_noprof+0x3d5/0x6f0 mm/slub.c:5748
kmalloc_noprof include/linux/slab.h:957 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
usbtmc_open+0x9c/0x8e0 drivers/usb/class/usbtmc.c:175
usb_open+0x156/0x1e0 drivers/usb/core/file.c:47
chrdev_open+0x4cc/0x5e0 fs/char_dev.c:414
do_dentry_open+0x953/0x13f0 fs/open.c:965
vfs_open+0x3b/0x340 fs/open.c:1097
do_open fs/namei.c:3975 [inline]
path_openat+0x2ee5/0x3830 fs/namei.c:4134
do_filp_open+0x1fa/0x410 fs/namei.c:4161
do_sys_openat2+0x121/0x1c0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 24167:
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
__kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kfree+0x19a/0x6d0 mm/slub.c:6818
usbtmc_release+0x246/0x280 drivers/usb/class/usbtmc.c:261
__fput+0x44c/0xa70 fs/file_table.c:468
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888066c47000
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 272 bytes inside of
freed 1024-byte region [ffff888066c47000, ffff888066c47400)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888066c42000 pfn:0x66c40
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88813ffa6dc0 ffffea000083cc00 dead000000000002
raw: ffff888066c42000 000000008010000e 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88813ffa6dc0 ffffea000083cc00 dead000000000002
head: ffff888066c42000 000000008010000e 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea00019b1001 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 8097, tgid 8097 (kworker/u8:10), ts 1093959030086, free_ts 1093930662475
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3039 [inline]
allocate_slab+0x96/0x3a0 mm/slub.c:3212
new_slab mm/slub.c:3266 [inline]
___slab_alloc+0xe94/0x18a0 mm/slub.c:4636
__slab_alloc+0x65/0x100 mm/slub.c:4755
__slab_alloc_node mm/slub.c:4831 [inline]
slab_alloc_node mm/slub.c:5253 [inline]
__do_kmalloc_node mm/slub.c:5626 [inline]
__kmalloc_noprof+0x471/0x7f0 mm/slub.c:5639
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
ieee802_11_parse_elems_full+0x152/0x2ab0 net/mac80211/parse.c:1011
ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2470 [inline]
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2477 [inline]
ieee80211_inform_bss+0x10c/0x10a0 net/mac80211/scan.c:79
rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
cfg80211_inform_single_bss_data+0xd05/0x1ac0 net/wireless/scan.c:2385
cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3240
cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3331
ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:226
ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355
__ieee80211_rx_handle_packet net/mac80211/rx.c:5194 [inline]
ieee80211_rx_list+0x210c/0x2b90 net/mac80211/rx.c:5447
page last free pid 9168 tgid 9168 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2906
__slab_free+0x2e7/0x390 mm/slub.c:5947
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5272
getname_flags+0xb8/0x540 fs/namei.c:146
user_path_at+0x24/0x60 fs/namei.c:3214
ksys_umount fs/namespace.c:2061 [inline]
__do_sys_umount fs/namespace.c:2069 [inline]
__se_sys_umount fs/namespace.c:2067 [inline]
__x64_sys_umount+0xee/0x160 fs/namespace.c:2067
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888066c47000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888066c47080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888066c47100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888066c47180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888066c47200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 08 4c 89 ff or %cl,-0x1(%rcx,%rcx,4)
4: e8 64 8a 72 00 call 0x728a6d
9: 41 be e0 02 00 00 mov $0x2e0,%r14d
f: 4d 03 37 add (%r15),%r14
12: 4c 89 f0 mov %r14,%rax
15: 48 c1 e8 03 shr $0x3,%rax
19: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1)
1d: 74 08 je 0x27
1f: 4c 89 f7 mov %r14,%rdi
22: e8 46 8a 72 00 call 0x728a6d
27: 4d 8b 36 mov (%r14),%r14
* 2a: e8 fe ae 98 09 call 0x998af2d <-- trapping instruction
2f: 41 89 c5 mov %eax,%r13d
32: 31 ff xor %edi,%edi
34: 89 c6 mov %eax,%esi
36: e8 52 de 0c 00 call 0xcde8d
3b: 45 85 ed test %r13d,%r13d
3e: 74 21 je 0x61