================================================================== 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 ffff8880ab1cbb40 by task syz-executor.5/7892 CPU: 0 PID: 7892 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: 0033:0x7fc476d340a1 Code: ff 41 08 c5 0f 85 f7 01 00 00 41 83 c6 01 44 39 73 04 0f 86 b7 00 00 00 48 8b 04 24 44 89 f7 48 8b 53 28 4d 89 f8 48 03 14 f8 <80> 3d f0 0f 16 00 00 49 89 d7 89 d5 75 37 b8 00 00 00 80 48 01 d0 RSP: 002b:00007fff64231030 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 00007fc476afd008 RBX: 00007fc476e98ff8 RCX: 0000001b30120000 RDX: ffffffff83771e2c RSI: 0000001b301222d0 RDI: 000000000000f035 RBP: 00000000c2ee2f22 R08: ffffffff83771e05 R09: 00000000c2ee2f26 R10: 0000000000000000 R11: 0000000000000000 R12: 00007fc476e8d000 R13: 0000000000000001 R14: 000000000000f035 R15: ffffffff83771e05 Allocated by task 7905: __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 6523: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 kvfree+0x59/0x60 mm/util.c:452 memcg_destroy_list_lru_node mm/list_lru.c:388 [inline] memcg_destroy_list_lru mm/list_lru.c:477 [inline] list_lru_destroy mm/list_lru.c:649 [inline] list_lru_destroy+0x353/0x460 mm/list_lru.c:639 destroy_unused_super.part.0+0x2d/0x120 fs/super.c:179 destroy_unused_super fs/super.c:175 [inline] sget_userns+0xaed/0xcd0 fs/super.c:528 sget+0x102/0x140 fs/super.c:570 gfs2_mount_meta fs/gfs2/ops_fstype.c:1359 [inline] gfs2_mount_meta+0x18b/0x2c0 fs/gfs2/ops_fstype.c:1342 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880ab1cbb40 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880ab1cbb40, ffff8880ab1cbb60) The buggy address belongs to the page: page:ffffea0002ac72c0 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff8880ab1cbfc1 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea00023cd988 ffffea00023c3248 ffff88813bff01c0 raw: ffff8880ab1cbfc1 ffff8880ab1cb000 000000010000002d 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880ab1cba00: fb fb fb fb fc fc fc fc 05 fc fc fc fc fc fc fc ffff8880ab1cba80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880ab1cbb00: fb fb fb fb fc fc fc fc 01 fc fc fc fc fc fc fc ^ ffff8880ab1cbb80: 05 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ffff8880ab1cbc00: 00 01 fc fc fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================