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BUG: KASAN: use-after-free in memcpy include/linux/string.h:381 [inline]
BUG: KASAN: use-after-free in skb_put_data include/linux/skbuff.h:2284 [inline]
BUG: KASAN: use-after-free in hfa384x_int_rxmonitor drivers/staging/wlan-ng/hfa384x_usb.c:3414 [inline]
BUG: KASAN: use-after-free in hfa384x_usbin_rx drivers/staging/wlan-ng/hfa384x_usb.c:3312 [inline]
BUG: KASAN: use-after-free in hfa384x_usbin_callback+0x17ad/0x2380 drivers/staging/wlan-ng/hfa384x_usb.c:3026
Read of size 19671 at addr ffff8881cad3733c by task systemd-udevd/3246

CPU: 1 PID: 3246 Comm: systemd-udevd Not tainted 5.6.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xef/0x16e lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x314 mm/kasan/report.c:374
 __kasan_report.cold+0x37/0x77 mm/kasan/report.c:506
 kasan_report+0xe/0x20 mm/kasan/common.c:641
 check_memory_region_inline mm/kasan/generic.c:185 [inline]
 check_memory_region+0x152/0x1c0 mm/kasan/generic.c:192
 memcpy+0x20/0x50 mm/kasan/common.c:127
 memcpy include/linux/string.h:381 [inline]
 skb_put_data include/linux/skbuff.h:2284 [inline]
 hfa384x_int_rxmonitor drivers/staging/wlan-ng/hfa384x_usb.c:3414 [inline]
 hfa384x_usbin_rx drivers/staging/wlan-ng/hfa384x_usb.c:3312 [inline]
 hfa384x_usbin_callback+0x17ad/0x2380 drivers/staging/wlan-ng/hfa384x_usb.c:3026
 __usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716
 dummy_timer+0x1258/0x32ae drivers/usb/gadget/udc/dummy_hcd.c:1966
 call_timer_fn+0x195/0x6f0 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x5f9/0x1500 kernel/time/timer.c:1786
 __do_softirq+0x21e/0x950 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x178/0x1a0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x141/0x540 arch/x86/kernel/apic/apic.c:1146
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:stack_trace_consume_entry+0xb/0x160 kernel/stacktrace.c:83
Code: 28 3b 08 48 c7 c7 00 75 e8 85 e8 e9 1f fa ff e9 1d e5 ff ff cc cc cc cc cc cc cc cc cc cc cc 48 b8 00 00 00 00 00 fc ff df 55 <53> 48 89 fb 48 83 c7 10 48 89 fa 48 83 ec 08 48 c1 ea 03 0f b6 04
RSP: 0018:ffff8881c48d7898 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffffffff812f4150 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8167cbcb RDI: ffff8881c48d7958
RBP: ffff8881c48d7928 R08: 0000000000000001 R09: 0000000000000001
R10: 000000000001cf99 R11: 0000000000000001 R12: ffff8881c48d7958
R13: 0000000000000000 R14: ffff8881cbf10000 R15: ffff8881be2bb400
 arch_stack_walk+0x67/0xd0 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:337 [inline]
 __kasan_slab_free+0x117/0x160 mm/kasan/common.c:476
 slab_free_hook mm/slub.c:1444 [inline]
 slab_free_freelist_hook mm/slub.c:1477 [inline]
 slab_free mm/slub.c:3024 [inline]
 kmem_cache_free+0x9b/0x360 mm/slub.c:3040
 remove_vma+0x137/0x170 mm/mmap.c:181
 exit_mmap+0x31b/0x4d0 mm/mmap.c:3137
 __mmput kernel/fork.c:1082 [inline]
 mmput+0xce/0x3d0 kernel/fork.c:1103
 exit_mm kernel/exit.c:485 [inline]
 do_exit+0xa83/0x2c80 kernel/exit.c:788
 do_group_exit+0x125/0x340 kernel/exit.c:899
 __do_sys_exit_group kernel/exit.c:910 [inline]
 __se_sys_exit_group kernel/exit.c:908 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:908
 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f32aa993618
Code: Bad RIP value.
RSP: 002b:00007ffd676c61d8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007ffd676c62a0 RCX: 00007f32aa993618
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00007ffd676c6350 R08: 00000000000000e7 R09: fffffffffffffe50
R10: 00000000ffffffff R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 000000000000000e

The buggy address belongs to the page:
page:ffffea00072b4c00 refcount:32769 mapcount:0 mapping:0000000000000000 index:0x0 compound_mapcount: 0
flags: 0x200000000010000(head)
raw: 0200000000010000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00008001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881cad3bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881cad3bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881cad3c000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8881cad3c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881cad3c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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