------------[ cut here ]------------
WARNING: CPU: 1 PID: 10780 at net/ipv4/ipmr.c:440 ipmr_rules_exit+0x13a/0x1c0
Modules linked in:
CPU: 1 UID: 0 PID: 10780 Comm: syz-executor.4 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:ffff888041847c20 EFLAGS: 00010212
RAX: 000000000001831a RBX: ffff888031c40000 RCX: ffffc90008248000
RDX: 0000000000040000 RSI: ffffffff8406ea09 RDI: 0000000000000005
RBP: ffff888035e82000 R08: 0000000000000000 R09: ffffed1006388029
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffff888031c40800 R14: ffff888031c40000 R15: fffffbfff0c51178
FS:  00007f72e5b70700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9db916b008 CR3: 0000000038104000 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
 unshare_nsproxy_namespaces+0xc0/0x200
 ksys_unshare+0x46a/0xa10
 __x64_sys_unshare+0x31/0x40
 do_syscall_64+0xbf/0x1d0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f72e861bb19
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:00007f72e5b70188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f72e872f020 RCX: 00007f72e861bb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000048040080
RBP: 00007f72e8675f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffce0ac38cf R14: 00007f72e5b70300 R15: 0000000000022000
 </TASK>
irq event stamp: 6073
hardirqs last  enabled at (6083): [<ffffffff81528b38>] __up_console_sem+0x78/0x80
hardirqs last disabled at (6094): [<ffffffff81528b1d>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (5418): [<ffffffff813a9e4c>] handle_softirqs+0x50c/0x770
softirqs last disabled at (5403): [<ffffffff813aa1e4>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'.
loop4: detected capacity change from 0 to 512
EXT4-fs (loop4): Invalid log block size: 1634433657
loop4: detected capacity change from 0 to 512
EXT4-fs (loop4): Invalid log block size: 1634433657