usb usb9: usbfs: process 25047 (syz-executor.5) did not claim interface 0 before use usb usb9: usbfs: process 25062 (syz-executor.5) did not claim interface 0 before use ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:377 [inline] BUG: KASAN: slab-out-of-bounds in usb_hcd_poll_rh_status+0x387/0x6f0 drivers/usb/core/hcd.c:771 Write of size 2 at addr ffff8880ab602dc0 by task syz-executor.5/25060 CPU: 0 PID: 25060 Comm: syz-executor.5 Not tainted 4.19.211-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+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report+0x8f/0xa0 mm/kasan/report.c:412 memcpy+0x35/0x50 mm/kasan/kasan.c:303 memcpy include/linux/string.h:377 [inline] usb_hcd_poll_rh_status+0x387/0x6f0 drivers/usb/core/hcd.c:771 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0033:0x7f641ba75ee1 Code: 49 89 0e 49 89 7e 08 49 8b 50 f8 48 89 ee 4c 89 e3 4c 89 c0 0f 1f 44 00 00 49 89 dd 48 39 cf 72 2f 48 83 e8 08 48 39 d1 73 14 <0f> 1f 80 00 00 00 00 48 8b 50 f8 48 83 e8 08 48 39 ca 77 f3 48 39 RSP: 002b:00007ffcfbb291e0 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13 RAX: 00007f641b8b6fc0 RBX: 00007f641b8675a0 RCX: ffffffff83771e2c RDX: ffffffff83771e31 RSI: 00007f641b8675a8 RDI: ffffffff83771e2c RBP: 00007f641b8660e8 R08: 00007f641b8b9658 R09: 00000000ee5a3a10 R10: 00007ffcfbb29470 R11: 0000000000000246 R12: 00007f641b8660e0 R13: 00007f641b8675a0 R14: 00007f641b8660d8 R15: 000000000000001c Allocated by task 25062: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] proc_do_submiturb+0x2d17/0x3b00 drivers/usb/core/devio.c:1673 proc_submiturb drivers/usb/core/devio.c:1827 [inline] usbdev_do_ioctl+0x773/0x3030 drivers/usb/core/devio.c:2481 usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2585 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 1757: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 batadv_mcast_mla_list_free net/batman-adv/multicast.c:315 [inline] __batadv_mcast_mla_update net/batman-adv/multicast.c:631 [inline] batadv_mcast_mla_update+0x8d9/0x1bf0 net/batman-adv/multicast.c:654 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 The buggy address belongs to the object at ffff8880ab602dc0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880ab602dc0, ffff8880ab602de0) The buggy address belongs to the page: page:ffffea0002ad8080 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff8880ab602fc1 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002a36b08 ffffea00027d0a48 ffff88813bff01c0 raw: ffff8880ab602fc1 ffff8880ab602000 0000000100000032 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880ab602c80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880ab602d00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880ab602d80: fb fb fb fb fc fc fc fc 01 fc fc fc fc fc fc fc ^ ffff8880ab602e00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880ab602e80: fb fb fb fb fc fc fc fc 06 fc fc fc fc fc fc fc ==================================================================