------------[ cut here ]------------ WARNING: CPU: 1 PID: 10 at fs/kernfs/dir.c:496 kernfs_get.part.0+0x69/0x80 fs/kernfs/dir.c:496 Modules linked in: CPU: 1 PID: 10 Comm: kworker/u4:1 Not tainted 5.16.0-rc2-next-20211125-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:kernfs_get.part.0+0x69/0x80 fs/kernfs/dir.c:496 Code: 31 ff 89 ee e8 c8 a4 7d ff 85 ed 74 18 e8 9f a2 7d ff be 04 00 00 00 48 89 df e8 02 35 c8 ff f0 ff 03 5b 5d c3 e8 87 a2 7d ff <0f> 0b eb df 48 89 df e8 6b 31 c8 ff eb c6 66 0f 1f 84 00 00 00 00 RSP: 0018:ffffc90000cf7918 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888000103d98 RCX: 0000000000000000 RDX: ffff888011921d40 RSI: ffffffff81fa4259 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888000103d9b R10: ffffffff81fa4238 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888000103d98 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f07269d4004 CR3: 000000007a8bf000 CR4: 00000000003506e0 Call Trace: <TASK> kernfs_get fs/kernfs/dir.c:495 [inline] __kernfs_remove+0x2a8/0xab0 fs/kernfs/dir.c:1342 kernfs_remove_by_name_ns+0x4f/0xa0 fs/kernfs/dir.c:1544 kernfs_remove_by_name include/linux/kernfs.h:570 [inline] remove_files+0x96/0x1c0 fs/sysfs/group.c:28 sysfs_remove_group+0x87/0x170 fs/sysfs/group.c:288 sysfs_remove_groups fs/sysfs/group.c:312 [inline] sysfs_remove_groups+0x5c/0xa0 fs/sysfs/group.c:304 destroy_gid_attrs drivers/infiniband/core/sysfs.c:1188 [inline] ib_free_port_attrs+0x1dd/0x460 drivers/infiniband/core/sysfs.c:1408 remove_one_compat_dev drivers/infiniband/core/device.c:1001 [inline] rdma_dev_exit_net+0x2b2/0x550 drivers/infiniband/core/device.c:1139 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:593 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2299 worker_thread+0x658/0x11f0 kernel/workqueue.c:2446 kthread+0x405/0x4f0 kernel/kthread.c:345 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK>