last executing test programs: 472.292756ms ago: executing program 0: ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000)) 451.043159ms ago: executing program 2: getsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), &(0x7f0000000000)) 373.512991ms ago: executing program 1: write(0xffffffffffffffff, &(0x7f0000000000), 0x0) 109.691242ms ago: executing program 1: recvfrom(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0, 0x0, 0x0) 80.011127ms ago: executing program 0: accept(0xffffffffffffffff, 0x0, &(0x7f0000000000)) 0s ago: executing program 2: setsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), 0x0) kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.88' (ED25519) to the list of known hosts. 2024/06/18 03:19:39 fuzzer started 2024/06/18 03:19:39 dialing manager at 10.128.0.163:30035 [ 60.569077][ T5091] cgroup: Unknown subsys name 'net' [ 60.805148][ T5091] cgroup: Unknown subsys name 'rlimit' [ 61.931145][ T5102] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k 2024/06/18 03:19:47 starting 3 executor processes [ 68.832174][ T3820] [ 68.834714][ T3820] ============================= [ 68.839804][ T3820] WARNING: suspicious RCU usage [ 68.845100][ T3820] 6.10.0-rc3-syzkaller-00700-gefb459303dd5 #0 Not tainted [ 68.852504][ T3820] ----------------------------- [ 68.857379][ T3820] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage! [ 68.867340][ T3820] [ 68.867340][ T3820] other info that might help us debug this: [ 68.867340][ T3820] [ 68.877915][ T3820] [ 68.877915][ T3820] rcu_scheduler_active = 2, debug_locks = 1 [ 68.886093][ T3820] 3 locks held by kworker/u8:9/3820: [ 68.891400][ T3820] #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 [ 68.902904][ T3820] #1: ffffc9000c12fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 [ 68.913593][ T3820] #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 [ 68.923416][ T3820] [ 68.923416][ T3820] stack backtrace: [ 68.929431][ T3820] CPU: 1 PID: 3820 Comm: kworker/u8:9 Not tainted 6.10.0-rc3-syzkaller-00700-gefb459303dd5 #0 [ 68.939789][ T3820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 [ 68.949962][ T3820] Workqueue: netns cleanup_net [ 68.954792][ T3820] Call Trace: [ 68.958080][ T3820] [ 68.961016][ T3820] dump_stack_lvl+0x241/0x360 [ 68.965709][ T3820] ? __pfx_dump_stack_lvl+0x10/0x10 [ 68.970907][ T3820] ? __pfx__printk+0x10/0x10 [ 68.975619][ T3820] lockdep_rcu_suspicious+0x221/0x340 [ 68.980998][ T3820] _destroy_all_sets+0x232/0x5f0 [ 68.985939][ T3820] ip_set_net_exit+0x20/0x50 [ 68.990524][ T3820] cleanup_net+0x802/0xcc0 [ 68.994940][ T3820] ? __pfx_cleanup_net+0x10/0x10 [ 68.999967][ T3820] ? process_scheduled_works+0x945/0x1830 [ 69.005770][ T3820] process_scheduled_works+0xa2c/0x1830 [ 69.011444][ T3820] ? __pfx_process_scheduled_works+0x10/0x10 [ 69.017482][ T3820] ? assign_work+0x364/0x3d0 [ 69.022129][ T3820] worker_thread+0x86d/0xd70 [ 69.026757][ T3820] ? _raw_spin_unlock_irqrestore+0xdd/0x140 2024/06/18 03:19:48 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF [ 69.032671][ T3820] ? __kthread_parkme+0x169/0x1d0 [ 69.037886][ T3820] ? __pfx_worker_thread+0x10/0x10 [ 69.043010][ T3820] kthread+0x2f0/0x390 [ 69.047164][ T3820] ? __pfx_worker_thread+0x10/0x10 [ 69.052303][ T3820] ? __pfx_kthread+0x10/0x10 [ 69.057089][ T3820] ret_from_fork+0x4b/0x80 [ 69.061624][ T3820] ? __pfx_kthread+0x10/0x10 [ 69.066259][ T3820] ret_from_fork_asm+0x1a/0x30 [ 69.071508][ T3820] [ 69.183132][ T3820] [ 69.185532][ T3820] ============================= [ 69.190410][ T3820] WARNING: suspicious RCU usage [ 69.195417][ T3820] 6.10.0-rc3-syzkaller-00700-gefb459303dd5 #0 Not tainted [ 69.202667][ T3820] ----------------------------- [ 69.207540][ T3820] net/netfilter/ipset/ip_set_core.c:1211 suspicious rcu_dereference_protected() usage! [ 69.217531][ T3820] [ 69.217531][ T3820] other info that might help us debug this: [ 69.217531][ T3820] [ 69.227931][ T3820] [ 69.227931][ T3820] rcu_scheduler_active = 2, debug_locks = 1 [ 69.236250][ T3820] 3 locks held by kworker/u8:9/3820: [ 69.241734][ T3820] #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 [ 69.252716][ T3820] #1: ffffc9000c12fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 [ 69.263499][ T3820] #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 [ 69.273265][ T3820] [ 69.273265][ T3820] stack backtrace: [ 69.279193][ T3820] CPU: 1 PID: 3820 Comm: kworke