==================================================================
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:927
Write of size 4 at addr ffff88806883e910 by task syz-executor.3/6423
CPU: 1 UID: 0 PID: 6423 Comm: syz-executor.3 Not tainted 6.16.0-rc6-syzkaller-g4871b7cb27f4 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x230 mm/kasan/report.c:480
kasan_report+0x118/0x150 mm/kasan/report.c:593
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189
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:927
__usb_hcd_giveback_urb+0x2c0/0x690 drivers/usb/core/hcd.c:1636
dummy_timer+0x862/0x4550 drivers/usb/gadget/udc/dummy_hcd.c:1995
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842
handle_softirqs+0x286/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:syscall_enter_from_user_mode_work include/linux/entry-common.h:169 [inline]
RIP: 0010:syscall_enter_from_user_mode include/linux/entry-common.h:200 [inline]
RIP: 0010:do_syscall_64+0xc3/0x3b0 arch/x86/entry/syscall_64.c:90
Code: 00 48 8b 7d 08 48 89 7b 18 e8 49 5a 00 00 0f 1f 44 00 00 0f 1f 44 00 00 90 e8 c9 94 5a f6 90 90 e8 72 94 5a f6 fb 49 8b 57 08 c2 3f 74 0e 4c 89 f7 4c 89 ee e8 cd ec 3d f6 49 89 c4 90 90 41
RSP: 0018:ffffc9000b2c7ef0 EFLAGS: 00000286
RAX: b4fe5cdce113f700 RBX: ffffc9000b2c7ef0 RCX: b4fe5cdce113f700
RDX: 0000000000000000 RSI: ffffffff8d9960d9 RDI: ffffffff8be28c00
RBP: ffffc9000b2c7f48 R08: ffffffff8fa1d6f7 R09: 1ffffffff1f43ade
R10: dffffc0000000000 R11: fffffbfff1f43adf R12: 0000000000000010
R13: 0000000000000010 R14: ffffc9000b2c7f58 R15: ffff888026fdbc00
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe63747dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe63818c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe6375abf80 RCX: 00007fe63747dda9
RDX: 0000000020000040 RSI: 00000000c0145b0e RDI: 0000000000000004
RBP: 00007fe6374ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fe6375abf80 R15: 00007ffdb59e7418
Allocated by task 6423:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4359
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
usbtmc_open+0x9c/0x8e0 drivers/usb/class/usbtmc.c:175
usb_open+0x153/0x1e0 drivers/usb/core/file.c:47
chrdev_open+0x4c9/0x5e0 fs/char_dev.c:414
do_dentry_open+0xdf0/0x1970 fs/open.c:964
vfs_open+0x3b/0x340 fs/open.c:1094
do_open fs/namei.c:3896 [inline]
path_openat+0x2ee5/0x3830 fs/namei.c:4055
do_filp_open+0x1fa/0x410 fs/namei.c:4082
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/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 6423:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kfree+0x18e/0x440 mm/slub.c:4842
usbtmc_release+0x246/0x280 drivers/usb/class/usbtmc.c:261
__fput+0x44c/0xa70 fs/file_table.c:465
task_work_run+0x1d1/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88806883e800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 272 bytes inside of
freed 1024-byte region [ffff88806883e800, ffff88806883ec00)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x68838
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 ffff88801a441dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801a441dc0 dead000000000122 0000000000000000
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0001a20e01 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 59, tgid 59 (kworker/u8:4), ts 116963256005, free_ts 26845362490
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab+0x8a/0x3b0 mm/slub.c:2619
new_slab mm/slub.c:2673 [inline]
___slab_alloc+0xbfc/0x1480 mm/slub.c:3859
__slab_alloc mm/slub.c:3949 [inline]
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
__do_kmalloc_node mm/slub.c:4327 [inline]
__kmalloc_noprof+0x305/0x4f0 mm/slub.c:4340
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
ieee802_11_parse_elems_full+0x152/0x2aa0 net/mac80211/parse.c:1011
ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2414 [inline]
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2421 [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:2367
cfg80211_inform_bss_data+0x1fb/0x3b20 net/wireless/scan.c:3222
cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3313
ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226
ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline]
ieee80211_ibss_rx_queued_mgmt+0xa36/0x2ae0 net/mac80211/ibss.c:1600
ieee80211_iface_process_skb net/mac80211/iface.c:1670 [inline]
ieee80211_iface_work+0x806/0xfe0 net/mac80211/iface.c:1724
cfg80211_wiphy_work+0x2df/0x460 net/wireless/core.c:435
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x1bd/0x4a0 mm/page_alloc.c:6927
destroy_args+0x7e/0x5d0 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x412/0x450 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x233/0x820 init/main.c:1274
do_initcall_level+0x137/0x1f0 init/main.c:1336
do_initcalls+0x69/0xd0 init/main.c:1352
kernel_init_freeable+0x3d9/0x570 init/main.c:1584
kernel_init+0x1d/0x1d0 init/main.c:1474
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff88806883e800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88806883e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88806883e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88806883e980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88806883ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 00 48 8b add %cl,-0x75(%rax)
3: 7d 08 jge 0xd
5: 48 89 7b 18 mov %rdi,0x18(%rbx)
9: e8 49 5a 00 00 call 0x5a57
e: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
13: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
18: 90 nop
19: e8 c9 94 5a f6 call 0xf65a94e7
1e: 90 nop
1f: 90 nop
20: e8 72 94 5a f6 call 0xf65a9497
25: fb sti
26: 49 8b 57 08 mov 0x8(%r15),%rdx
* 2a: f6 c2 3f test $0x3f,%dl <-- trapping instruction
2d: 74 0e je 0x3d
2f: 4c 89 f7 mov %r14,%rdi
32: 4c 89 ee mov %r13,%rsi
35: e8 cd ec 3d f6 call 0xf63ded07
3a: 49 89 c4 mov %rax,%r12
3d: 90 nop
3e: 90 nop
3f: 41 rex.B