IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
batman_adv: batadv0: Interface activated: batadv_slave_1
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
==================================================================
BUG: KASAN: use-after-free in vgem_gem_dumb_create+0x200/0x210 drivers/gpu/drm/vgem/vgem_drv.c:215
Read of size 8 at addr ffff8880a5e56e40 by task syz-executor.5/10746

CPU: 0 PID: 10746 Comm: syz-executor.5 Not tainted 4.14.229-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 vgem_gem_dumb_create+0x200/0x210 drivers/gpu/drm/vgem/vgem_drv.c:215
 drm_mode_create_dumb_ioctl+0x221/0x2b0 drivers/gpu/drm/drm_dumb_buffers.c:92
 drm_ioctl_kernel+0x14c/0x200 drivers/gpu/drm/drm_ioctl.c:736
 drm_ioctl+0x419/0x870 drivers/gpu/drm/drm_ioctl.c:836