IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 ================================================================== BUG: KASAN: stack-out-of-bounds in memset include/linux/string.h:337 [inline] BUG: KASAN: stack-out-of-bounds in ax25_getname+0x58/0x790 net/ax25/af_ax25.c:1399 Write of size 72 at addr ffff888085c2fb80 by task syz-executor0/8369 CPU: 1 PID: 8369 Comm: syz-executor0 Not tainted 4.20.0-rc7-next-20181224 #189 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+0x1d3/0x2c6 lib/dump_stack.c:113 print_address_description.cold.5+0x9/0x1ff mm/kasan/report.c:187 kasan_report.cold.6+0x1b/0x39 mm/kasan/report.c:317 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/generic.c:191 memset+0x23/0x40 mm/kasan/common.c:113 memset include/linux/string.h:337 [inline] ax25_getname+0x58/0x790 net/ax25/af_ax25.c:1399 get_raw_socket drivers/vhost/net.c:1445 [inline] get_socket drivers/vhost/net.c:1501 [inline] vhost_net_set_backend drivers/vhost/net.c:1536 [inline] vhost_net_ioctl+0x139c/0x1bf0 drivers/vhost/net.c:1727 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4579b9 Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa611f32c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004579b9 RDX: 0000000020f1dff8 RSI: 000000004008af30 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa611f336d4 R13: 00000000004c2191 R14: 00000000004d4560 R15: 00000000ffffffff The buggy address belongs to the page: page:ffffea0002170bc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x1fffc0000000000() raw: 01fffc0000000000 0000000000000000 ffffffff02170101 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888085c2fa80: 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 ffff888085c2fb00: 00 f2 f2 f2 f2 f2 f2 f2 04 f2 f2 f2 f2 f2 f2 f2 >ffff888085c2fb80: 00 00 00 00 00 00 04 f2 00 00 00 00 00 00 00 00 ^ ffff888085c2fc00: 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 ffff888085c2fc80: f2 f2 f2 f2 f2 f2 00 00 00 f2 f2 f2 f2 f2 00 00 ==================================================================