IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline] BUG: KASAN: slab-out-of-bounds in fbcon_get_font+0x288/0x550 drivers/video/fbdev/core/fbcon.c:2421 Read of size 5 at addr ffff8880a50a360c by task syz-executor128/7088 CPU: 0 PID: 7088 Comm: syz-executor128 Not tainted 4.14.158-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+0x142/0x197 lib/dump_stack.c:58 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x123/0x190 mm/kasan/kasan.c:267 memcpy+0x24/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:347 [inline] fbcon_get_font+0x288/0x550 drivers/video/fbdev/core/fbcon.c:2421 con_font_get drivers/tty/vt/vt.c:4078 [inline] con_font_op+0x1d5/0x1060 drivers/tty/vt/vt.c:4229 vt_ioctl+0xb80/0x2170 drivers/tty/vt/vt_ioctl.c:927 tty_ioctl+0x841/0x1320 drivers/tty/tty_io.c:2661 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x447f99 RSP: 002b:00007fc02c69fdb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006ddc48 RCX: 0000000000447f99 RDX: 0000000020000140 RSI: 0000000000004b60 RDI: 0000000000000003 RBP: 00000000006ddc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc4c R13: 00007ffcb45d497f R14: 00007fc02c6a09c0 R15: 00000000006ddc4c Allocated by task 7076: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529 __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x15d/0x7a0 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] fbcon_set_font+0x2f8/0x7b0 drivers/video/fbdev/core/fbcon.c:2618 con_font_set drivers/tty/vt/vt.c:4162 [inline] con_font_op+0xc0f/0x1060 drivers/tty/vt/vt.c:4227 vt_ioctl+0xb80/0x2170 drivers/tty/vt/vt_ioctl.c:927 tty_ioctl+0x841/0x1320 drivers/tty/tty_io.c:2661 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8880a50a3200 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 1036 bytes inside of 2048-byte region [ffff8880a50a3200, ffff8880a50a3a00) The buggy address belongs to the page: page:ffffea0002942880 count:1 mapcount:0 mapping:ffff8880a50a2100 index:0x0 compound_mapcount: 0 flags: 0xfffe0000008100(slab|head) raw: 00fffe0000008100 ffff8880a50a2100 0000000000000000 0000000100000003 raw: ffffea0002807620 ffffea0002838e20 ffff8880aa800c40 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a50a3500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a50a3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a50a3600: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a50a3680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a50a3700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================