================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:447 [inline] BUG: KASAN: slab-out-of-bounds in skb_copy_from_linear_data_offset include/linux/skbuff.h:3676 [inline] BUG: KASAN: slab-out-of-bounds in skb_segment+0x14ba/0x37a0 net/core/skbuff.c:3996 Read of size 2324 at addr ffff888012acf2f7 by task syz-executor.5/16015 CPU: 1 PID: 16015 Comm: syz-executor.5 Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:230 __kasan_report mm/kasan/report.c:396 [inline] kasan_report.cold+0x79/0xd5 mm/kasan/report.c:413 check_memory_region_inline mm/kasan/generic.c:179 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:185 memcpy+0x20/0x60 mm/kasan/shadow.c:64 memcpy include/linux/string.h:447 [inline] skb_copy_from_linear_data_offset include/linux/skbuff.h:3676 [inline] skb_segment+0x14ba/0x37a0 net/core/skbuff.c:3996 udp4_ufo_fragment+0x4ae/0x700 net/ipv4/udp_offload.c:363 inet_gso_segment+0x502/0x1110 net/ipv4/af_inet.c:1378 skb_mac_gso_segment+0x26e/0x530 net/core/dev.c:3326 __skb_gso_segment+0x330/0x6e0 net/core/dev.c:3399 skb_gso_segment include/linux/netdevice.h:4708 [inline] validate_xmit_skb+0x69e/0xee0 net/core/dev.c:3644 __dev_queue_xmit+0x988/0x2dd0 net/core/dev.c:4142 packet_snd net/packet/af_packet.c:3006 [inline] packet_sendmsg+0x2406/0x52a0 net/packet/af_packet.c:3031 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 __sys_sendto+0x21c/0x320 net/socket.c:1975 __do_sys_sendto net/socket.c:1987 [inline] __se_sys_sendto net/socket.c:1983 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1983 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f0eb20acc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000045e219 RDX: 000000000000fc13 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 000000000119bfd8 R08: 0000000000000000 R09: 000000000000002f R10: 0000000000000800 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffffdd1cf8f R14: 00007f0eb20ad9c0 R15: 000000000119bf8c Allocated by task 8496: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:401 [inline] ____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:429 kasan_slab_alloc include/linux/kasan.h:205 [inline] slab_post_alloc_hook mm/slab.h:512 [inline] slab_alloc_node mm/slub.c:2891 [inline] slab_alloc mm/slub.c:2899 [inline] kmem_cache_alloc+0x1c6/0x440 mm/slub.c:2904 kmem_cache_zalloc include/linux/slab.h:672 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:626 kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:688 __kernfs_create_file+0x51/0x350 fs/kernfs/file.c:1002 sysfs_add_file_mode_ns+0x226/0x540 fs/sysfs/file.c:306 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x328/0xb20 fs/sysfs/group.c:149 internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:189 internal_create_groups fs/sysfs/group.c:185 [inline] sysfs_create_groups+0x25/0x50 fs/sysfs/group.c:215 device_add_groups drivers/base/core.c:2186 [inline] device_add_attrs drivers/base/core.c:2334 [inline] device_add+0x824/0x1d90 drivers/base/core.c:3042 netdev_register_kobject+0x181/0x430 net/core/net-sysfs.c:1939 register_netdevice+0xd67/0x1760 net/core/dev.c:10037 ipvlan_link_new+0x3a4/0xc10 drivers/net/ipvlan/ipvlan_main.c:586 __rtnl_newlink+0x108b/0x16e0 net/core/rtnetlink.c:3443 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3491 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5553 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 __sys_sendto+0x21c/0x320 net/socket.c:1975 __do_sys_sendto net/socket.c:1987 [inline] __se_sys_sendto net/socket.c:1983 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1983 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff888012acf2b8 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 63 bytes inside of 168-byte region [ffff888012acf2b8, ffff888012acf360) The buggy address belongs to the page: page:00000000f4df822e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12acf flags: 0xfff00000000200(slab) raw: 00fff00000000200 dead000000000100 dead000000000122 ffff8880101be780 raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888012acf200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ffff888012acf280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 >ffff888012acf300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ^ ffff888012acf380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ffff888012acf400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ==================================================================