vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(4) vhci_hcd: connection closed vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed) ================================================================== vhci_hcd: stop threads BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:376 [inline] BUG: KASAN: slab-out-of-bounds in usb_hcd_poll_rh_status+0x326/0x630 drivers/usb/core/hcd.c:782 Write of size 2 at addr ffff8880a9d21e40 by task syz-executor.3/7559 CPU: 0 PID: 7559 Comm: syz-executor.3 Not tainted 4.14.223-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 vhci_hcd: release socket kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report+0x6f/0x80 mm/kasan/report.c:409 memcpy+0x35/0x50 mm/kasan/kasan.c:303 memcpy include/linux/string.h:376 [inline] usb_hcd_poll_rh_status+0x326/0x630 drivers/usb/core/hcd.c:782 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:192 RSP: 0018:ffff88809ebbfb60 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff11e1251 RBX: 0000000000000286 RCX: 1ffff11009b81d24 RDX: dffffc0000000000 RSI: ffff88804dc0e900 RDI: 0000000000000286 RBP: ffff888237c8e0f0 R08: 000000000000003c R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 R13: ffff8880a9c6ca20 R14: ffff888237c8e0f0 R15: ffff8880a9c6ca28 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline] store_attach+0x42c/0x7c0 drivers/usb/usbip/vhci_sysfs.c:402 dev_attr_store+0x56/0x80 drivers/base/core.c:738 sysfs_kf_write+0x106/0x160 fs/sysfs/file.c:141 kernfs_fop_write+0x289/0x440 fs/kernfs/file.c:316 __vfs_write+0xe4/0x630 fs/read_write.c:480 vfs_write+0x17f/0x4d0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xf2/0x210 fs/read_write.c:582 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4190df RSP: 002b:00007ff9d7db0b90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00000000004190df RDX: 0000000000000008 RSI: 00007ff9d7db0be0 RDI: 0000000000000006 RBP: 0000000000000006 R08: 0000000000000000 R09: 00007ff9d7db0b30 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000004afb38 R13: 00007ff9d7db0be0 R14: 0000000000000000 R15: 0000000000022000 Allocated by task 7559: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x15a/0x400 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] proc_do_submiturb+0x280f/0x3610 drivers/usb/core/devio.c:1684 proc_submiturb drivers/usb/core/devio.c:1841 [inline] usbdev_do_ioctl+0x665/0x2b70 drivers/usb/core/devio.c:2495 usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2599 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb Freed by task 4632: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xc9/0x250 mm/slab.c:3815 aa_free_task_context+0xda/0x130 security/apparmor/context.c:54 apparmor_cred_free+0x34/0x70 security/apparmor/lsm.c:58 security_cred_free+0x71/0xb0 security/security.c:1003 put_cred_rcu+0xe3/0x300 kernel/cred.c:117 __put_cred+0x1a1/0x210 kernel/cred.c:151 put_cred include/linux/cred.h:271 [inline] SYSC_faccessat fs/open.c:444 [inline] SyS_faccessat+0x52a/0x680 fs/open.c:353 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb The buggy address belongs to the object at ffff8880a9d21e40 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880a9d21e40, ffff8880a9d21e60) The buggy address belongs to the page: page:ffffea0002a74840 count:1 mapcount:0 mapping:ffff8880a9d21000 index:0xffff8880a9d21fc1 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880a9d21000 ffff8880a9d21fc1 0000000100000035 raw: ffffea0002841e20 ffffea0002d16da0 ffff88813fe801c0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a9d21d00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a9d21d80: 05 fc fc fc fc fc fc fc 00 fc fc fc fc fc fc fc >ffff8880a9d21e00: 00 01 fc fc fc fc fc fc 01 fc fc fc fc fc fc fc ^ ffff8880a9d21e80: 05 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a9d21f00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================