and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= ext4: Unknown parameter '' ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7125 at net/ipv4/ipmr.c:440 ipmr_rules_exit+0x13a/0x1c0 Modules linked in: CPU: 0 UID: 0 PID: 7125 Comm: syz-executor.5 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:ffff8880411ff8b8 EFLAGS: 00010212 RAX: 0000000000017a52 RBX: ffff88803f7b2e00 RCX: ffffc900045fa000 RDX: 0000000000040000 RSI: ffffffff8406ea09 RDI: 0000000000000005 RBP: ffff88803fd08000 R08: 0000000000000000 R09: ffffed1007ef65e9 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88803f7b3600 R14: ffff88803f7b2e00 R15: fffffbfff0c51178 FS: 00007ff6a1bc0700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f20bb493000 CR3: 000000001358a000 CR4: 0000000000350ef0 Call Trace: 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 __do_sys_clone3+0x1d9/0x260