netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
==================================================================
BUG: KASAN: use-after-free in is_multicast_ether_addr include/linux/etherdevice.h:119 [inline]
BUG: KASAN: use-after-free in ipvlan_xmit_mode_l2 drivers/net/ipvlan/ipvlan_core.c:622 [inline]
BUG: KASAN: use-after-free in ipvlan_queue_xmit+0xdbd/0x1010 drivers/net/ipvlan/ipvlan_core.c:645
Read of size 4 at addr ffff8881417567ff by task syz-executor102/8359

CPU: 0 PID: 8359 Comm: syz-executor102 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x176/0x24e lib/dump_stack.c:120
 print_address_description+0x5f/0x3a0 mm/kasan/report.c:232
 __kasan_report mm/kasan/report.c:399 [inline]
 kasan_report+0x15c/0x200 mm/kasan/report.c:416
 is_multicast_ether_addr include/linux/etherdevice.h:119 [inline]
 ipvlan_xmit_mode_l2 drivers/net/ipvlan/ipvlan_core.c:622 [inline]
 ipvlan_queue_xmit+0xdbd/0x1010 drivers/net/ipvlan/ipvlan_core.c:645
 ipvlan_start_xmit+0x45/0x170 drivers/net/ipvlan/ipvlan_main.c:222
 __netdev_start_xmit include/linux/netdevice.h:4825 [inline]
 netdev_start_xmit include/linux/netdevice.h:4839 [inline]
 __dev_direct_xmit+0x49b/0x700 net/core/dev.c:4262
 dev_direct_xmit include/linux/netdevice.h:2873 [inline]
 packet_direct_xmit+0x163/0x290 net/packet/af_packet.c:244
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x4cd8/0x6650 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg net/socket.c:674 [inline]
 __sys_sendto+0x438/0x5c0 net/socket.c:1977
 __do_sys_sendto net/socket.c:1989 [inline]
 __se_sys_sendto net/socket.c:1985 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:1985
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x449d49
Code: 28 c3 e8 aa 15 00 00 66 2e 0f 1f 84 00 00 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd54a19f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007ffd54a19f60 RCX: 0000000000449d49
RDX: 000000000000000e RSI: 0000000020000000 RDI: 0000000000000004
RBP: 0000000000000003 R08: 0000000000000000 R09: ffffffffffffff09
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd54a19f70
R13: 00007ffd54a19f58 R14: 00007ffd54a19f90 R15: 0000000000000003

The buggy address belongs to the page:
page:ffffea000505d580 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x141756
flags: 0x57ff00000000000()
raw: 057ff00000000000 0000000000000000 ffffea000505d588 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888141756680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888141756700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888141756780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                                ^
 ffff888141756800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888141756880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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