last executing test programs: 480.439086ms ago: executing program 0: sendmsg(0xffffffffffffffff, &(0x7f0000000000), 0x0) 312.186162ms ago: executing program 2: getsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), &(0x7f0000000000)) 243.841203ms ago: executing program 1: ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000)) 129.90725ms ago: executing program 0: write(0xffffffffffffffff, &(0x7f0000000000), 0x0) 26.509726ms ago: executing program 2: setsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), 0x0) 0s ago: executing program 1: connect(0xffffffffffffffff, &(0x7f0000000000), 0x0) kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.160' (ED25519) to the list of known hosts. 2024/06/16 14:18:45 fuzzer started 2024/06/16 14:18:45 dialing manager at 10.128.0.163:30035 [ 59.776075][ T5089] cgroup: Unknown subsys name 'net' [ 60.061664][ T5089] cgroup: Unknown subsys name 'rlimit' [ 61.274134][ T5115] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 61.286930][ T5115] syz-executor (5115) used greatest stack depth: 18800 bytes left 2024/06/16 14:18:53 starting 3 executor processes [ 67.800741][ T11] [ 67.803726][ T11] ============================= [ 67.809012][ T11] WARNING: suspicious RCU usage [ 67.813884][ T11] 6.10.0-rc3-syzkaller-00688-g934c29999b57 #0 Not tainted [ 67.821365][ T11] ----------------------------- [ 67.826239][ T11] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage! [ 67.835956][ T11] [ 67.835956][ T11] other info that might help us debug this: [ 67.835956][ T11] [ 67.846350][ T11] 2024/06/16 14:18:54 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF [ 67.846350][ T11] rcu_scheduler_active = 2, debug_locks = 1 [ 67.854570][ T11] 3 locks held by kworker/u8:0/11: [ 67.859718][ T11] #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 [ 67.871008][ T11] #1: ffffc90000107d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 [ 67.881997][ T11] #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 [ 67.891543][ T11] [ 67.891543][ T11] stack backtrace: [ 67.897547][ T11] CPU: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.10.0-rc3-syzkaller-00688-g934c29999b57 #0 [ 67.907737][ T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 [ 67.917914][ T11] Workqueue: netns cleanup_net [ 67.923219][ T11] Call Trace: [ 67.926697][ T11] [ 67.929658][ T11] dump_stack_lvl+0x241/0x360 [ 67.934368][ T11] ? __pfx_dump_stack_lvl+0x10/0x10 [ 67.939677][ T11] ? __pfx__printk+0x10/0x10 [ 67.944395][ T11] lockdep_rcu_suspicious+0x221/0x340 [ 67.949807][ T11] _destroy_all_sets+0x232/0x5f0 [ 67.954788][ T11] ip_set_net_exit+0x20/0x50 [ 67.959413][ T11] cleanup_net+0x802/0xcc0 [ 67.963859][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 67.968831][ T11] ? process_scheduled_works+0x945/0x1830 [ 67.974566][ T11] process_scheduled_works+0xa2c/0x1830 [ 67.980169][ T11] ? __pfx_process_scheduled_works+0x10/0x10 [ 67.986180][ T11] ? assign_work+0x364/0x3d0 [ 67.990884][ T11] worker_thread+0x86d/0xd70 [ 67.995514][ T11] ? __kthread_parkme+0x169/0x1d0 [ 68.000726][ T11] ? __pfx_worker_thread+0x10/0x10 [ 68.005832][ T11] kthread+0x2f0/0x390 [ 68.010536][ T11] ? __pfx_worker_thread+0x10/0x10 [ 68.015735][ T11] ? __pfx_kthread+0x10/0x10 [ 68.020418][ T11] ret_from_fork+0x4b/0x80 [ 68.024834][ T11] ? __pfx_kthread+0x10/0x10 [ 68.029676][ T11] ret_from_fork_asm+0x1a/0x30 [ 68.034661][ T11] [ 68.088215][ T11] [ 68.090597][ T11] ============================= [ 68.095455][ T11] WARNING: suspicious RCU usage [ 68.100405][ T11] 6.10.0-rc3-syzkaller-00688-g934c29999b57 #0 Not tainted [ 68.107544][ T11] ----------------------------- [ 68.112474][ T11] net/netfilter/ipset/ip_set_core.c:1211 suspicious rcu_dereference_protected() usage! [ 68.122880][ T11] [ 68.122880][ T11] other info that might help us debug this: [ 68.122880][ T11] [ 68.133294][ T11] [ 68.133294][ T11] rcu_schedule