IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KASAN: slab-out-of-bounds in ipv6_addr_equal include/net/ipv6.h:507 [inline] BUG: KASAN: slab-out-of-bounds in __sctp_v6_cmp_addr+0x4c7/0x530 net/sctp/ipv6.c:580 Read of size 8 at addr ffff8801d661ad10 by task syz-executor0/4792 CPU: 1 PID: 4792 Comm: syz-executor0 Not tainted 4.17.0-rc2+ #48 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+0x1b9/0x294 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 ipv6_addr_equal include/net/ipv6.h:507 [inline] __sctp_v6_cmp_addr+0x4c7/0x530 net/sctp/ipv6.c:580 sctp_inet6_cmp_addr+0x169/0x1a0 net/sctp/ipv6.c:898 sctp_bind_addr_conflict+0x28c/0x470 net/sctp/bind_addr.c:368 sctp_get_port_local+0x9fc/0x1540 net/sctp/socket.c:7515 sctp_do_bind+0x21c/0x5f0 net/sctp/socket.c:435 sctp_bindx_add+0x90/0x1a0 net/sctp/socket.c:529 sctp_setsockopt_bindx+0x2ad/0x320 net/sctp/socket.c:1058 sctp_setsockopt+0x12c4/0x7000 net/sctp/socket.c:4227 compat_sock_common_setsockopt+0x10c/0x150 net/core/sock.c:3052 __compat_sys_setsockopt+0x1ab/0x7c0 net/compat.c:403 __do_compat_sys_setsockopt net/compat.c:416 [inline] __se_compat_sys_setsockopt net/compat.c:413 [inline] __ia32_compat_sys_setsockopt+0xbd/0x150 net/compat.c:413 do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline] do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff2cb9 RSP: 002b:00000000f7fee0ac EFLAGS: 00000282 ORIG_RAX: 000000000000016e RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000084 RDX: 0000000000000064 RSI: 0000000020223fd4 RDI: 0000000000000010 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 4792: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node+0x47/0x70 mm/slab.c:3689 kmalloc_node include/linux/slab.h:554 [inline] kvmalloc_node+0x6b/0x100 mm/util.c:421 kvmalloc include/linux/mm.h:550 [inline] vmemdup_user+0x2d/0xa0 mm/util.c:186 sctp_setsockopt_bindx+0x5d/0x320 net/sctp/socket.c:1022 sctp_setsockopt+0x12c4/0x7000 net/sctp/socket.c:4227 compat_sock_common_setsockopt+0x10c/0x150 net/core/sock.c:3052 __compat_sys_setsockopt+0x1ab/0x7c0 net/compat.c:403 __do_compat_sys_setsockopt net/compat.c:416 [inline] __se_compat_sys_setsockopt net/compat.c:413 [inline] __ia32_compat_sys_setsockopt+0xbd/0x150 net/compat.c:413 do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline] do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Freed by task 3165: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x260 mm/slab.c:3813 free_bprm+0x1a4/0x210 fs/exec.c:1428 do_execveat_common.isra.34+0x1cd2/0x2590 fs/exec.c:1827 do_execve fs/exec.c:1862 [inline] __do_sys_execve fs/exec.c:1943 [inline] __se_sys_execve fs/exec.c:1938 [inline] __x64_sys_execve+0x8d/0xb0 fs/exec.c:1938 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801d661ad00 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 16 bytes inside of 32-byte region [ffff8801d661ad00, ffff8801d661ad20) The buggy address belongs to the page: page:ffffea0007598680 count:1 mapcount:0 mapping:ffff8801d661a000 index:0xffff8801d661afc1 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801d661a000 ffff8801d661afc1 000000010000000a raw: ffffea000758eee0 ffffea00075911a0 ffff8801da8001c0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d661ac00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8801d661ac80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8801d661ad00: 00 00 fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff8801d661ad80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8801d661ae00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================