IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 ================================================================== BUG: KASAN: slab-out-of-bounds in __get_unaligned_cpu32 include/linux/unaligned/packed_struct.h:19 [inline] BUG: KASAN: slab-out-of-bounds in mc_hash drivers/net/macvlan.c:255 [inline] BUG: KASAN: slab-out-of-bounds in macvlan_broadcast+0x57c/0x660 drivers/net/macvlan.c:281 Read of size 4 at addr ffff88808ec93a01 by task syz-executor042/8004 CPU: 0 PID: 8004 Comm: syz-executor042 Not tainted 4.19.93-syzkaller #0 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+0x197/0x210 lib/dump_stack.c:118 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report.c:443 __get_unaligned_cpu32 include/linux/unaligned/packed_struct.h:19 [inline] mc_hash drivers/net/macvlan.c:255 [inline] macvlan_broadcast+0x57c/0x660 drivers/net/macvlan.c:281 macvlan_queue_xmit drivers/net/macvlan.c:524 [inline] macvlan_start_xmit+0x408/0x785 drivers/net/macvlan.c:563 __netdev_start_xmit include/linux/netdevice.h:4308 [inline] netdev_start_xmit include/linux/netdevice.h:4317 [inline] dev_direct_xmit+0x34d/0x650 net/core/dev.c:3909 protocol 88fb is buggy, dev hsr_slave_0 packet_direct_xmit+0xf9/0x170 net/packet/af_packet.c:246 protocol 88fb is buggy, dev hsr_slave_1 packet_snd net/packet/af_packet.c:2958 [inline] packet_sendmsg+0x3bb2/0x6440 net/packet/af_packet.c:2983 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 __sys_sendto+0x262/0x380 net/socket.c:1787 IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready __do_sys_sendto net/socket.c:1799 [inline] __se_sys_sendto net/socket.c:1795 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1795 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x442529 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 5b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 protocol 88fb is buggy, dev hsr_slave_0 RSP: 002b:00007ffd950789f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442529 RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 protocol 88fb is buggy, dev hsr_slave_1 R13: 0000000000403aa0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 8004: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 __do_kmalloc mm/slab.c:3727 [inline] __kmalloc_track_caller+0x159/0x750 mm/slab.c:3742 kmemdup+0x27/0x60 mm/util.c:118 kmemdup include/linux/string.h:421 [inline] __addrconf_sysctl_register+0xae/0x430 net/ipv6/addrconf.c:6554 addrconf_sysctl_register net/ipv6/addrconf.c:6619 [inline] addrconf_sysctl_register+0x140/0x1e0 net/ipv6/addrconf.c:6608 ipv6_add_dev net/ipv6/addrconf.c:446 [inline] ipv6_add_dev+0x9d0/0x10a0 net/ipv6/addrconf.c:366 addrconf_notify+0x960/0x2160 net/ipv6/addrconf.c:3437 notifier_call_chain+0xc2/0x230 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1747 call_netdevice_notifiers net/core/dev.c:1765 [inline] register_netdevice+0xa4d/0xff0 net/core/dev.c:8576 rtnl_newlink+0x13de/0x1600 net/core/rtnetlink.c:3145 rtnetlink_rcv_msg+0x463/0xb00 net/core/rtnetlink.c:4768 netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4786 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x53a/0x730 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 __sys_sendto+0x262/0x380 net/socket.c:1787 __do_sys_sendto net/socket.c:1799 [inline] __se_sys_sendto net/socket.c:1795 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1795 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff88808ec92c40 which belongs to the cache kmalloc-4096 of size 4096 The buggy address is located 3521 bytes inside of 4096-byte region [ffff88808ec92c40, ffff88808ec93c40) The buggy address belongs to the page: page:ffffea00023b2480 count:1 mapcount:0 mapping:ffff88812c31cdc0 index:0x0 compound_mapcount: 0 flags: 0xfffe0000008100(slab|head) raw: 00fffe0000008100 ffffea00023d5108 ffffea00024a1a88 ffff88812c31cdc0 raw: 0000000000000000 ffff88808ec92c40 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808ec93900: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff88808ec93980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88808ec93a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88808ec93a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88808ec93b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================