WARNING: CPU: 1 PID: 24855 at net/core/dev.c:1961 call_netdevice_notifiers_info+0x107/0x130 net/core/dev.c:1961 Modules linked in: CPU: 1 PID: 24855 Comm: syz-executor.5 Not tainted 6.5.0-rc7-next-20230823-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:call_netdevice_notifiers_info+0x107/0x130 net/core/dev.c:1961 Code: f9 40 84 ed 75 8d e8 98 fb 55 f9 ba a9 07 00 00 48 c7 c6 a0 ef a2 8b 48 c7 c7 e0 ef a2 8b c6 05 45 48 86 06 01 e8 09 1a 1c f9 <0f> 0b e9 62 ff ff ff 48 89 df e8 2a 9e ab f9 e9 15 ff ff ff e8 20 RSP: 0018:ffffc9000ea8f298 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffc9000ea8f300 RCX: ffffc900045fa000 RDX: 0000000000040000 RSI: ffffffff814df276 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 205d353538343254 R12: 0000000000000018 R13: ffff88801abad7c0 R14: ffff888037f800e8 R15: 0000000000000001 FS: 00007f4091f7c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555587e8f8 CR3: 0000000029285000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: call_netdevice_notifiers_extack net/core/dev.c:2008 [inline] call_netdevice_notifiers net/core/dev.c:2022 [inline] dev_set_mtu_ext+0x1e8/0x5d0 net/core/dev.c:8728 dev_set_mtu+0xb1/0x160 net/core/dev.c:8758 batadv_update_min_mtu+0x6e/0x90 net/batman-adv/hard-interface.c:646 batadv_netlink_set_mesh+0x7dc/0x1660 net/batman-adv/netlink.c:498 genl_family_rcv_msg_doit+0x1fc/0x2e0 net/netlink/genetlink.c:971 genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline] genl_rcv_msg+0x55c/0x800 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1075 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:753 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2540 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2594 __sys_sendmsg+0x117/0x1e0 net/socket.c:2623 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f409127cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4091f7c0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f409139bf80 RCX: 00007f409127cae9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007f40912c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f409139bf80 R15: 00007ffe4cd2ccb8