last executing test programs: 677.290626ms ago: executing program 0: ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000)) 662.174878ms ago: executing program 2: setsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), 0x0) 647.04676ms ago: executing program 1: sendmsg(0xffffffffffffffff, &(0x7f0000000000), 0x0) 286.596316ms ago: executing program 2: getpeername(0xffffffffffffffff, &(0x7f0000000000), &(0x7f0000000000)) 256.202631ms ago: executing program 0: getsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), &(0x7f0000000000)) 228.581385ms ago: executing program 1: syz_init_net_socket$bt_sco(0x1f, 0x5, 0x2) 0s ago: executing program 0: socket$bt_bnep(0x1f, 0x3, 0x4) kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.225' (ED25519) to the list of known hosts. 2024/06/17 03:05:04 fuzzer started 2024/06/17 03:05:05 dialing manager at 10.128.0.163:30035 syzkaller login: [ 54.971824][ T5090] cgroup: Unknown subsys name 'net' [ 55.226093][ T5090] cgroup: Unknown subsys name 'rlimit' [ 56.371194][ T5113] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k 2024/06/17 03:05:12 starting 3 executor processes [ 62.962345][ T1106] [ 62.964883][ T1106] ============================= [ 62.970163][ T1106] WARNING: suspicious RCU usage [ 62.975031][ T1106] 6.10.0-rc3-syzkaller-00688-g934c29999b57 #0 Not tainted [ 62.982481][ T1106] ----------------------------- [ 62.987435][ T1106] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage! [ 62.997345][ T1106] [ 62.997345][ T1106] other info that might help us debug this: [ 62.997345][ T1106] [ 63.007640][ T1106] [ 63.007640][ T1106] rcu_scheduler_active = 2, debug_locks = 1 [ 63.015920][ T1106] 3 locks held by kworker/u8:5/1106: [ 63.021308][ T1106] #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 [ 63.032575][ T1106] #1: ffffc90004457d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 [ 63.043553][ T1106] #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 [ 63.053163][ T1106] [ 63.053163][ T1106] stack backtrace: [ 63.059456][ T1106] CPU: 0 PID: 1106 Comm: kworker/u8:5 Not tainted 6.10.0-rc3-syzkaller-00688-g934c29999b57 #0 [ 63.069901][ T1106] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 [ 63.080074][ T1106] Workqueue: netns cleanup_net [ 63.084892][ T1106] Call Trace: [ 63.088282][ T1106] [ 63.091236][ T1106] dump_stack_lvl+0x241/0x360 [ 63.096123][ T1106] ? __pfx_dump_stack_lvl+0x10/0x10 [ 63.101343][ T1106] ? __pfx__printk+0x10/0x10 [ 63.105971][ T1106] lockdep_rcu_suspicious+0x221/0x340 2024/06/17 03:05:13 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF [ 63.111368][ T1106] _destroy_all_sets+0x232/0x5f0 [ 63.116336][ T1106] ip_set_net_exit+0x20/0x50 [ 63.120948][ T1106] cleanup_net+0x802/0xcc0 [ 63.125485][ T1106] ? __pfx_cleanup_net+0x10/0x10 [ 63.130465][ T1106] ? process_scheduled_works+0x945/0x1830 [ 63.136208][ T1106] process_scheduled_works+0xa2c/0x1830 [ 63.141797][ T1106] ? __pfx_process_scheduled_works+0x10/0x10 [ 63.147801][ T1106] ? assign_work+0x364/0x3d0 [ 63.152496][ T1106] worker_thread+0x86d/0xd70 [ 63.157122][ T1106] ? __kthread_parkme+0x169/0x1d0 [ 63.162162][ T1106] ? __pfx_worker_thread+0x10/0x10 [ 63.167294][ T1106] kthread+0x2f0/0x390 [ 63.171358][ T1106] ? __pfx_worker_thread+0x10/0x10 [ 63.176459][ T1106] ? __pfx_kthread+0x10/0x10 [ 63.181043][ T1106] ret_from_fork+0x4b/0x80 [ 63.185453][ T1106] ? __pfx_kthread+0x10/0x10 [ 63.190378][ T1106] ret_from_fork_asm+0x1a/0x30 [ 63.195147][ T1106] [ 63.263705][ T1106] [ 63.266129][ T1106] ============================= [ 63.271312][ T1106] WARNING: suspicious RCU usage [ 63.276349][ T1106] 6.10.0-rc3-syzkaller-00688-g934c29999b57 #0 Not tainted [ 63.284010][ T1106] ----------------------------- [ 63.289168][ T1106] net/netfilter/ipset/ip_set_core.c:1211 suspicious rcu_dereference_protected() usage! [ 63.299214][ T1106] [ 63.299214][ T1106] other info that might help us debug this: [ 63.299214][ T1106] [ 63.309940][ T1106] [ 63.309940][ T1106