------------[ cut here ]------------
sysfs group 'gids' not found for kobject '1'
WARNING: CPU: 0 PID: 7 at fs/sysfs/group.c:279 sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279
Modules linked in:
CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279
Code: 48 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 37 48 8b 33 48 c7 c7 e0 70 5b 89 e8 1a 76 c4 06 <0f> 0b eb 98 e8 81 7e ca ff e9 01 ff ff ff 48 89 df e8 74 7e ca ff
RSP: 0018:ffffc90000cc7ad8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880148c9450 RCX: 0000000000000000
RDX: ffff888010d23480 RSI: ffffffff8158ce35 RDI: fffff52000198f4d
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8880b9e309e7
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880148c9400
R13: ffffffff8a24f0c0 R14: ffff8880148c9408 R15: ffff888028a33508
FS:  0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559f31cbcd17 CR3: 0000000012adf000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ib_free_port_attrs+0x31f/0x5b0 drivers/infiniband/core/sysfs.c:1343
 remove_one_compat_dev drivers/infiniband/core/device.c:950 [inline]
 rdma_dev_exit_net+0x2fe/0x540 drivers/infiniband/core/device.c:1088
 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:187
 cleanup_net+0x4ea/0xa00 net/core/net_namespace.c:604
 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
 kthread+0x3af/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296