------------[ cut here ]------------ WARNING: CPU: 1 PID: 8723 at net/ipv4/ipmr.c:440 ipmr_rules_exit+0x13a/0x1c0 Modules linked in: CPU: 1 UID: 0 PID: 8723 Comm: syz-executor.1 Not tainted 6.13.0-rc3-next-20241220 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:ipmr_rules_exit+0x13a/0x1c0 Code: ff df 48 c1 ea 03 80 3c 02 00 75 7d 48 c7 83 00 08 00 00 00 00 00 00 5b 5d 41 5c 41 5d 41 5e e9 5c 80 a3 00 e8 47 df 6a fd 90 <0f> 0b 90 eb 93 e8 3c df 6a fd 0f b6 2d 1d 26 36 02 31 ff 89 ee e8 RSP: 0018:ffff88803dc6f8b8 EFLAGS: 00010216 RAX: 0000000000019f06 RBX: ffff88803240ae00 RCX: ffffc900027e1000 RDX: 0000000000040000 RSI: ffffffff8406ea09 RDI: 0000000000000005 RBP: ffff88800ec9a000 R08: 0000000000000000 R09: ffffed10064815e9 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88803240b600 R14: ffff88803240ae00 R15: fffffbfff0c51178 FS: 00007f9417316700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ab69908748 CR3: 000000003c0c2000 CR4: 0000000000350ef0 Call Trace: <TASK> ipmr_net_exit_batch+0x53/0xa0 ops_exit_list+0x12b/0x180 setup_net+0x492/0x7a0 copy_net_ns+0x2e3/0x700 create_new_namespaces+0x3f6/0xaf0 copy_namespaces+0x45c/0x580 copy_process+0x26c0/0x70e0 kernel_clone+0xeb/0x850 9pnet_fd: Insufficient options for proto=fd __do_sys_clone3+0x1d9/0x260 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9419dc1b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9417316188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f9419ed5020 RCX: 00007f9419dc1b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020001540 RBP: 00007f9419e1bf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef4dce21f R14: 00007f9417316300 R15: 0000000000022000 </TASK> irq event stamp: 9695 hardirqs last enabled at (9701): [<ffffffff8153304f>] vprintk_emit.part.0+0x57f/0x5c0 hardirqs last disabled at (9706): [<ffffffff81532fe0>] vprintk_emit.part.0+0x510/0x5c0 softirqs last enabled at (9436): [<ffffffff813a9e4c>] handle_softirqs+0x50c/0x770 softirqs last disabled at (9431): [<ffffffff813aa1e4>] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- netlink: 'syz-executor.0': attribute type 7 has an invalid length. loop4: detected capacity change from 0 to 264192 loop4: detected capacity change from 0 to 264192 netlink: 'syz-executor.0': attribute type 7 has an invalid length. Zero length message leads to an empty skb