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: use-after-free in __get_unaligned_cpu32 include/linux/unaligned/packed_struct.h:19 [inline] BUG: KASAN: use-after-free in mc_hash drivers/net/macvlan.c:255 [inline] BUG: KASAN: use-after-free in macvlan_broadcast+0x57c/0x660 drivers/net/macvlan.c:281 Read of size 4 at addr ffff88808ba4b041 by task syz-executor633/7939 CPU: 0 PID: 7939 Comm: syz-executor633 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 packet_direct_xmit+0xf9/0x170 net/packet/af_packet.c:246 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 __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: 0033:0x442bd9 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 RSP: 002b:00007ffc2ad49008 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442bd9 RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000404150 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the page: page:ffffea00022e92c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0xfffe0000000000() raw: 00fffe0000000000 0000000000000000 ffffffff022e0101 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808ba4af00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808ba4af80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88808ba4b000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88808ba4b080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808ba4b100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================