[0] skb 0xffff8881d13fe000 datalen 19671. hfa384x_int_rxmonitor, 3388 ================================================================== BUG: KASAN: use-after-free in memcpy include/linux/string.h:381 [inline] BUG: KASAN: use-after-free in skb_put_data+0x28/0x30 include/linux/skbuff.h:2284 Read of size 19671 at addr ffff8881c3fc653c by task systemd-udevd/154 CPU: 0 PID: 154 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: __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+0x28/0x30 include/linux/skbuff.h:2284 hfa384x_int_rxmonitor drivers/staging/wlan-ng/hfa384x_usb.c:3421 [inline] hfa384x_usbin_rx drivers/staging/wlan-ng/hfa384x_usb.c:3319 [inline] hfa384x_usbin_callback+0x1426/0x2120 drivers/staging/wlan-ng/hfa384x_usb.c:3032 __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 RIP: 0010:_raw_spin_unlock_irq+0x27/0x30 kernel/locking/spinlock.c:200 Code: 44 00 00 55 48 8b 74 24 08 48 89 fd 48 8d 7f 18 e8 5e e8 96 fb 48 89 ef e8 26 ca 97 fb e8 51 4e b5 fb fb 65 ff 0d 31 be 72 7a <5d> c3 0f 1f 80 00 00 00 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 RSP: 0018:ffff8881cf4bf930 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffffffff8712d1e0 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881d12851cc RBP: ffffffff871e1fe0 R08: ffff8881d1284980 R09: fffffbfff1266e92 R10: fffffbfff1266e91 R11: ffffffff8933748f R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff11039f55d09 R15: ffff8881cccdc400 spin_unlock_irq include/linux/spinlock.h:388 [inline] kernfs_get_open_node fs/kernfs/file.c:562 [inline] kernfs_fop_open+0x90a/0xdb0 fs/kernfs/file.c:717 do_dentry_open+0x494/0x1120 fs/open.c:797 do_last fs/namei.c:3490 [inline] path_openat+0x1222/0x32a0 fs/namei.c:3607 do_filp_open+0x192/0x260 fs/namei.c:3637 do_sys_openat2+0x54c/0x740 fs/open.c:1149 do_sys_open+0xc3/0x140 fs/open.c:1165 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f1ded2ee6f0 Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 19 30 2c 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe 9d 01 00 48 89 04 24 RSP: 002b:00007ffecce20548 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000558f33095dc0 RCX: 00007f1ded2ee6f0 RDX: 00000000000001b6 RSI: 0000000000080000 RDI: 0000558f33081050 RBP: 0000000000000008 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000080000 R11: 0000000000000246 R12: 0000558f318c068a R13: 0000000000000001 R14: 0000558f33080650 R15: 0000000000000001 The buggy address belongs to the page: page:ffffea00070ff000 refcount:32762 mapcount:0 mapping:0000000000000000 index:0x0 compound_mapcount: 0 flags: 0x200000000010000(head) raw: 0200000000010000 dead000000000100 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00007ffaffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881c3fc7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881c3fc7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881c3fc8000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881c3fc8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881c3fc8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================