usbtmc 3-1:16.0: usbtmc_read_bulk_cb - nonzero read bulk status received: -71
usbtmc 3-1:16.0: usbtmc_read_bulk_cb - nonzero read bulk status received: -71
usbtmc 3-1:16.0: 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 ffff88807da21110 by task syz.2.957/8873
CPU: 1 UID: 0 PID: 8873 Comm: syz.2.957 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:191 [inline]
RIP: 0010:__futex_hash+0x416/0x760 kernel/futex/core.c:423
Code: 00 e8 ee d9 0c 00 eb 05 e8 e7 d9 0c 00 4d 85 f6 0f 84 04 01 00 00 e8 d9 d9 0c 00 4d 8d 6e 04 4c 89 e8 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 97 02 00 00 45 8b 6d 00 31 ff 44 89 ee e8 f4 dd 0c 00
RSP: 0018:ffffc9000a7c7b30 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff88802a223c80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff81b36370
R10: ffffc9000a7c7c20 R11: fffff520014f8f87 R12: 1ffff920014f8f86
R13: ffff8880285ac004 R14: ffff8880285ac000 R15: ffffc9000a7c7c20
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_time32 kernel/futex/syscalls.c:515 [inline]
__se_sys_futex_time32+0x360/0x3e0 kernel/futex/syscalls.c:498
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0xb6/0x2b0 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f55539
Code: 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f544661c EFLAGS: 00000206 ORIG_RAX: 00000000000000f0
RAX: ffffffffffffffda RBX: 00000000f7414f8c RCX: 0000000000000081
RDX: 00000000000f4240 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 8873:
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_compat_sys_openat fs/open.c:1514 [inline]
__se_compat_sys_openat fs/open.c:1512 [inline]
__ia32_compat_sys_openat+0x131/0x160 fs/open.c:1512
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0xb6/0x2b0 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Freed by task 8873:
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_fast_syscall_32+0x1f4/0x2b0 arch/x86/entry/syscall_32.c:309
do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
The buggy address belongs to the object at ffff88807da21000
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 272 bytes inside of
freed 1024-byte region [ffff88807da21000, ffff88807da21400)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807da21800 pfn:0x7da20
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88813ffa6dc0 ffffea0001585c10 ffffea00016ddc10
raw: ffff88807da21800 000000000010000e 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88813ffa6dc0 ffffea0001585c10 ffffea00016ddc10
head: ffff88807da21800 000000000010000e 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0001f68801 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5559, tgid 5559 (dhcpcd), ts 60838158421, free_ts 60772203255
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]
load_elf_phdrs fs/binfmt_elf.c:540 [inline]
load_elf_binary+0x326/0x2740 fs/binfmt_elf.c:869
search_binary_handler fs/exec.c:1670 [inline]
exec_binprm fs/exec.c:1702 [inline]
bprm_execve+0x99c/0x1450 fs/exec.c:1754
do_execveat_common+0x510/0x6a0 fs/exec.c:1860
do_execve fs/exec.c:1934 [inline]
__do_sys_execve fs/exec.c:2010 [inline]
__se_sys_execve fs/exec.c:2005 [inline]
__x64_sys_execve+0x94/0xb0 fs/exec.c:2005
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
page last free pid 5557 tgid 5557 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
discard_slab mm/slub.c:3310 [inline]
__put_partials+0x146/0x170 mm/slub.c:3857
put_cpu_partial+0x1f2/0x2e0 mm/slub.c:3932
__slab_free+0x2b9/0x390 mm/slub.c:5906
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
getname include/linux/fs.h:2922 [inline]
do_sys_openat2+0xbc/0x1c0 fs/open.c:1431
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
Memory state around the buggy address:
ffff88807da21000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807da21080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807da21100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807da21180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807da21200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 00 e8 add %ch,%al
2: ee out %al,(%dx)
3: d9 0c 00 (bad) (%rax,%rax,1)
6: eb 05 jmp 0xd
8: e8 e7 d9 0c 00 call 0xcd9f4
d: 4d 85 f6 test %r14,%r14
10: 0f 84 04 01 00 00 je 0x11a
16: e8 d9 d9 0c 00 call 0xcd9f4
1b: 4d 8d 6e 04 lea 0x4(%r14),%r13
1f: 4c 89 e8 mov %r13,%rax
22: 48 c1 e8 03 shr $0x3,%rax
26: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 97 02 00 00 jne 0x2c9
32: 45 8b 6d 00 mov 0x0(%r13),%r13d
36: 31 ff xor %edi,%edi
38: 44 89 ee mov %r13d,%esi
3b: e8 f4 dd 0c 00 call 0xcde34