last executing test programs: 632.04765ms ago: executing program 2: ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000)) 608.835635ms ago: executing program 0: write(0xffffffffffffffff, &(0x7f0000000000), 0x0) 408.712305ms ago: executing program 1: setsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), 0x0) 282.358965ms ago: executing program 2: mmap(0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0) 274.661396ms ago: executing program 0: sendto(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0, 0x0, 0x0) 90.441825ms ago: executing program 1: sendmsg(0xffffffffffffffff, &(0x7f0000000000), 0x0) 0s ago: executing program 0: socket(0x10, 0x3, 0x10) kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.80' (ED25519) to the list of known hosts. 2024/06/18 08:20:09 fuzzer started 2024/06/18 08:20:09 dialing manager at 10.128.0.163:30035 [ 58.542607][ T5089] cgroup: Unknown subsys name 'net' [ 58.760072][ T5089] cgroup: Unknown subsys name 'rlimit' [ 59.903538][ T5088] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 59.916237][ T5088] syz-executor (5088) used greatest stack depth: 18832 bytes left 2024/06/18 08:20:16 starting 3 executor processes [ 65.753686][ T29] [ 65.756199][ T29] ============================= [ 65.761153][ T29] WARNING: suspicious RCU usage [ 65.766013][ T29] 6.10.0-rc3-syzkaller-00700-gefb459303dd5 #0 Not tainted [ 65.773275][ T29] ----------------------------- [ 65.778145][ T29] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage! [ 65.788044][ T29] [ 65.788044][ T29] other info that might help us debug this: [ 65.788044][ T29] [ 65.798379][ T29] 2024/06/18 08:20:17 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF [ 65.798379][ T29] rcu_scheduler_active = 2, debug_locks = 1 [ 65.806535][ T29] 3 locks held by kworker/u8:2/29: [ 65.811752][ T29] #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 [ 65.822804][ T29] #1: ffffc90000a57d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 [ 65.833480][ T29] #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 [ 65.843052][ T29] [ 65.843052][ T29] stack backtrace: [ 65.848970][ T29] CPU: 0 PID: 29 Comm: kworker/u8:2 Not tainted 6.10.0-rc3-syzkaller-00700-gefb459303dd5 #0 [ 65.859230][ T29] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 [ 65.869471][ T29] Workqueue: netns cleanup_net [ 65.874371][ T29] Call Trace: [ 65.877665][ T29] [ 65.880600][ T29] dump_stack_lvl+0x241/0x360 [ 65.885314][ T29] ? __pfx_dump_stack_lvl+0x10/0x10 [ 65.890537][ T29] ? __pfx__printk+0x10/0x10 [ 65.895178][ T29] lockdep_rcu_suspicious+0x221/0x340 [ 65.900579][ T29] _destroy_all_sets+0x232/0x5f0 [ 65.905550][ T29] ip_set_net_exit+0x20/0x50 [ 65.910604][ T29] cleanup_net+0x802/0xcc0 [ 65.915146][ T29] ? __pfx_cleanup_net+0x10/0x10 [ 65.920114][ T29] ? process_scheduled_works+0x945/0x1830 [ 65.925876][ T29] process_scheduled_works+0xa2c/0x1830 [ 65.931469][ T29] ? __pfx_process_scheduled_works+0x10/0x10 [ 65.937467][ T29] ? assign_work+0x364/0x3d0 [ 65.942077][ T29] worker_thread+0x86d/0xd70 [ 65.946696][ T29] ? __kthread_parkme+0x169/0x1d0 [ 65.951732][ T29] ? __pfx_worker_thread+0x10/0x10 [ 65.956943][ T29] kthread+0x2f0/0x390 [ 65.961023][ T29] ? __pfx_worker_thread+0x10/0x10 [ 65.966136][ T29] ? __pfx_kthread+0x10/0x10 [ 65.970737][ T29] ret_from_fork+0x4b/0x80 [ 65.975166][ T29] ? __pfx_kthread+0x10/0x10 [ 65.979766][ T29] ret_from_fork_asm+0x1a/0x30 [ 65.984558][ T29] [ 66.011278][ T29] [ 66.013662][ T29] ============================= [ 66.018528][ T29] WARNING: suspicious RCU usage [ 66.023713][ T29] 6.10.0-rc3-syzkaller-00700-gefb459303dd5 #0 Not tainted [ 66.030852][ T29] ----------------------------- [ 66.035830][ T29] net/netfilter/ipset/ip_set_core.c:1211 suspicious rcu_dereference_protected() usage! [ 66.045532][ T29] [ 66.045532][ T29] other info that might help us debug this: [ 66.045532][ T29] [ 66.056088][ T29] [ 66.056088][ T29] rcu_scheduler_a