loop0: detected capacity change from 0 to 16127 vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(6) vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed) ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/fortify-string.h:225 [inline] BUG: KASAN: slab-out-of-bounds in usb_hcd_poll_rh_status+0x376/0x780 drivers/usb/core/hcd.c:774 Write of size 2 at addr ffff88801e1be200 by task syz-executor.0/5509 CPU: 1 PID: 5509 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x6c/0x2d9 mm/kasan/report.c:256 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 memcpy+0x39/0x60 mm/kasan/shadow.c:66 memcpy include/linux/fortify-string.h:225 [inline] usb_hcd_poll_rh_status+0x376/0x780 drivers/usb/core/hcd.c:774 attach_store.cold+0x29b/0x399 drivers/usb/usbip/vhci_sysfs.c:436 dev_attr_store+0x50/0x80 drivers/base/core.c:2111 sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:136 kernfs_fop_write_iter+0x342/0x500 fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:2162 [inline] new_sync_write+0x429/0x660 fs/read_write.c:503 vfs_write+0x7cd/0xae0 fs/read_write.c:590 ksys_write+0x12d/0x250 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f7255a9f5ff Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48 RSP: 002b:00007f7253040b90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f7255a9f5ff RDX: 0000000000000007 RSI: 00007f7253040be0 RDI: 0000000000000008 RBP: 0000000000000008 R08: 0000000000000000 R09: 00007f7253040b30 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f7255b36948 R13: 00007f7253040be0 R14: 0000000000000000 R15: 0000000000022000 Allocated by task 23353: kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:269 [inline] __do_kmalloc mm/slab.c:3702 [inline] __kmalloc+0x209/0x4d0 mm/slab.c:3711 kmalloc include/linux/slab.h:595 [inline] proc_do_submiturb+0x2a49/0x35f0 drivers/usb/core/devio.c:1816 proc_submiturb drivers/usb/core/devio.c:1975 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2671 [inline] usbdev_ioctl+0x692/0x36c0 drivers/usb/core/devio.c:2791 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff88801e1be200 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff88801e1be200, ffff88801e1be220) The buggy address belongs to the page: page:ffffea0000786f80 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801e1befc1 pfn:0x1e1be flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000475d08 ffffea0001fac308 ffff888010c40100 raw: ffff88801e1befc1 ffff88801e1be000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 6624, ts 169475790598, free_ts 169434463374 prep_new_page mm/page_alloc.c:2418 [inline] get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369 __alloc_pages_node include/linux/gfp.h:570 [inline] kmem_getpages mm/slab.c:1377 [inline] cache_grow_begin+0x75/0x470 mm/slab.c:2593 cache_alloc_refill+0x27f/0x380 mm/slab.c:2965 ____cache_alloc mm/slab.c:3048 [inline] ____cache_alloc mm/slab.c:3031 [inline] slab_alloc_node mm/slab.c:3249 [inline] kmem_cache_alloc_node_trace+0x49c/0x5b0 mm/slab.c:3617 __do_kmalloc_node mm/slab.c:3639 [inline] __kmalloc_node+0x38/0x60 mm/slab.c:3647 kmalloc_node include/linux/slab.h:613 [inline] kvmalloc_node+0x61/0x120 mm/util.c:587 kvmalloc include/linux/slab.h:741 [inline] kvmalloc_array include/linux/slab.h:759 [inline] kvcalloc include/linux/slab.h:764 [inline] xt_alloc_entry_offsets+0x3b/0x50 net/netfilter/x_tables.c:968 translate_table+0x234/0x1750 net/ipv6/netfilter/ip6_tables.c:697 ip6t_register_table+0x10c/0x360 net/ipv6/netfilter/ip6_tables.c:1746 ip6table_nat_table_init+0x47/0x470 net/ipv6/netfilter/ip6table_nat.c:116 xt_find_table_lock+0x39e/0x680 net/netfilter/x_tables.c:1259 xt_request_find_table_lock+0x27/0xf0 net/netfilter/x_tables.c:1284 get_info+0x16a/0x740 net/ipv6/netfilter/ip6_tables.c:981 do_ip6t_get_ctl+0x152/0xa10 net/ipv6/netfilter/ip6_tables.c:1663 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x373/0x870 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3309 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3388 slab_destroy mm/slab.c:1627 [inline] slabs_destroy+0x89/0xc0 mm/slab.c:1647 cache_flusharray mm/slab.c:3418 [inline] ___cache_free+0x4cc/0x610 mm/slab.c:3480 qlink_free mm/kasan/quarantine.c:146 [inline] qlist_free_all+0x4e/0x110 mm/kasan/quarantine.c:165 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272 __kasan_slab_alloc+0x97/0xb0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc mm/slab.c:3323 [inline] __do_kmalloc mm/slab.c:3700 [inline] __kmalloc+0x27a/0x4d0 mm/slab.c:3711 kmalloc include/linux/slab.h:595 [inline] kzalloc include/linux/slab.h:724 [inline] ipt_alloc_initial_table+0x66/0x6c0 net/ipv4/netfilter/ip_tables.c:38 iptable_security_table_init+0x17/0x60 net/ipv4/netfilter/iptable_security.c:43 xt_find_table_lock+0x39e/0x680 net/netfilter/x_tables.c:1259 xt_request_find_table_lock+0x27/0xf0 net/netfilter/x_tables.c:1284 get_info+0x16a/0x740 net/ipv6/netfilter/ip6_tables.c:981 do_ipt_get_ctl+0x152/0x9d0 net/ipv4/netfilter/ip_tables.c:1654 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ip_getsockopt net/ipv4/ip_sockglue.c:1786 [inline] ip_getsockopt+0x164/0x1c0 net/ipv4/ip_sockglue.c:1765 Memory state around the buggy address: ffff88801e1be100: 05 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc ffff88801e1be180: 05 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc >ffff88801e1be200: 01 fc fc fc fc fc fc fc 00 00 00 00 fc fc fc fc ^ ffff88801e1be280: 05 fc fc fc fc fc fc fc 07 fc fc fc fc fc fc fc ffff88801e1be300: fa fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc ==================================================================