last executing test programs: 247.191443ms ago: executing program 3: syz_init_net_socket$netrom(0x6, 0x5, 0x0) 197.211481ms ago: executing program 4: vmsplice(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0) 194.785162ms ago: executing program 3: socket(0x1e, 0x2, 0x0) 181.041627ms ago: executing program 1: listen(0xffffffffffffffff, 0x0) 178.703818ms ago: executing program 4: mkdirat(0xffffffffffffffff, &(0x7f0000000000), 0x0) 174.780405ms ago: executing program 0: epoll_create1(0x0) 161.005279ms ago: executing program 3: syz_init_net_socket$bt_sco(0x1f, 0x5, 0x2) 158.421338ms ago: executing program 4: ppoll(&(0x7f0000000000), 0x0, &(0x7f0000000000), &(0x7f0000000000), 0x0) 152.147003ms ago: executing program 2: pselect6(0x0, &(0x7f0000000000), &(0x7f0000000000), &(0x7f0000000000), &(0x7f0000000000), &(0x7f0000000000)) 147.998716ms ago: executing program 0: socket$can_j1939(0x1d, 0x2, 0x7) 144.068388ms ago: executing program 1: getuid() 134.206804ms ago: executing program 2: openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/ppp', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/ppp', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/ppp', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/ppp', 0x800, 0x0) 125.475375ms ago: executing program 1: epoll_pwait(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0, &(0x7f0000000000), 0x0) 124.535525ms ago: executing program 4: socket$caif_seqpacket(0x25, 0x5, 0x0) 116.893113ms ago: executing program 3: socket$phonet(0x23, 0x2, 0x1) 103.379933ms ago: executing program 1: pipe(&(0x7f0000000000)) 99.201086ms ago: executing program 0: unshare(0x0) 96.653955ms ago: executing program 2: epoll_create(0x0) 82.333995ms ago: executing program 0: syz_init_net_socket$802154_raw(0x24, 0x3, 0x0) 76.066455ms ago: executing program 2: socket$tipc(0x1e, 0x2, 0x0) 74.305553ms ago: executing program 3: socket$nl_generic(0x10, 0x3, 0x10) 71.561166ms ago: executing program 1: socket$kcm(0x29, 0x2, 0x0) 62.674655ms ago: executing program 4: pread64(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0) 59.381433ms ago: executing program 3: socket$key(0xf, 0x3, 0x2) 47.853788ms ago: executing program 1: select(0x0, &(0x7f0000000000), &(0x7f0000000000), &(0x7f0000000000), &(0x7f0000000000)) 47.288032ms ago: executing program 2: socket$bt_hidp(0x1f, 0x3, 0x6) 32.201536ms ago: executing program 0: socket$nl_xfrm(0x10, 0x3, 0x6) 30.602126ms ago: executing program 4: socket$inet6_dccp(0xa, 0x6, 0x0) 22.237835ms ago: executing program 2: socket$inet6_tcp(0xa, 0x1, 0x0) 0s ago: executing program 0: socket$can_raw(0x1d, 0x3, 0x1) kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.0.46' (ED25519) to the list of known hosts. 2024/06/17 13:05:55 fuzzer started 2024/06/17 13:05:55 dialing manager at 10.128.0.169:30017 [ 58.524849][ T5090] cgroup: Unknown subsys name 'net' [ 58.803150][ T5090] cgroup: Unknown subsys name 'rlimit' 2024/06/17 13:05:57 starting 5 executor processes [ 59.911821][ T5108] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 60.768858][ T5176] UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list [ 61.154498][ T5230] UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list [ 61.984487][ T62] [ 61.986999][ T62] ============================= [ 61.991943][ T62] WARNING: suspicious RCU usage [ 61.996893][ T62] 6.10.0-rc3-syzkaller-00126-g0b9130247f3b #0 Not tainted [ 62.004132][ T62] ----------------------------- [ 62.009092][ T62] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage! [ 62.019246][ T62] [ 62.019246][ T62] other info that might help us debug this: [ 62.019246][ T62] [ 62.029530][ T62] 2024/06/17 13:05:59 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF [ 62.029530][ T62] rcu_scheduler_active = 2, debug_locks = 1 [ 62.038154][ T62] 3 locks held by kworker/u8:4/62: [ 62.043402][ T62] #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 [ 62.054515][ T62] #1: ffffc900015d7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 [ 62.065227][ T62] #2: ffffffff8f5db250 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 [ 62.074773][ T62] [ 62.074773][ T62] stack backtrace: [ 62.080728][ T62] CPU: 0 PID: 62 Comm: kworker/u8:4 Not tainted 6.10.0-rc3-syzkaller-00126-g0b9130247f3b #0 [ 62.090827][ T62] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 [ 62.100911][ T62] Workqueue: netns cleanup_net [ 62.105787][ T62] Call Trace: [ 62.109231][ T62] [ 62.112152][ T62] dump_stack_lvl+0x241/0x360 [ 62.116830][ T62] ? __pfx_dump_stack_lvl+0x10/0x10 [ 62.122109][ T62] ? __pfx__printk+0x10/0x10 [ 62.126701][ T62] lockdep_rcu_suspicious+0x221/0x340 [ 62.132074][ T62] _destroy_all_sets+0x232/0x5f0 [ 62.137008][ T62] ip_set_net_exit+0x20/0x50 [ 62.141648][ T62] cleanup_net+0x802/0xcc0 [ 62.146240][ T62] ? __pfx_cleanup_net+0x10/0x10 [ 62.151182][ T62] ? process_scheduled_works+0x945/0x1830 [ 62.156894][ T62] process_scheduled_works+0xa2c/0x1830 [ 62.162456][ T62] ? __pfx_process_scheduled_works+0x10/0x10 [ 62.168655][ T62] ? assign_work+0x364/0x3d0 [ 62.173241][ T62] worker_thread+0x86d/0xd70 [ 62.178002][ T62] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 62.183892][ T62] ? __kthread_parkme+0x169/0x1d0 [ 62.188941][ T62] ? __pfx_worker_thread+0x10/0x10 [ 62.194064][ T62] kthread+0x2f0/0x390 [ 62.198161][ T62] ? __pfx_worker_thread+0x10/0x10 [ 62.203281][ T62] ? __pfx_kthread+0x10/0x10 [ 62.207869][ T62] ret_from_fork+0x4b/0x80 [ 62.212282][ T62] ? __pfx_kthread+0x10/0x10 [ 62.216865][ T62] ret_from_fork_asm+0x1a/0x30 [ 62.221654][ T62] [ 62.311123][ T62] [ 62.313507][ T62] ============================= [ 62.318727][ T62] WARNING: suspicious RCU usage [ 62.323586][ T62] 6.10.0-rc3-syzkaller-00126-g0b9130247f3b #0 Not tainted [ 62.330877][ T62] ----------------------------- [ 62.335733][ T62] net/netfilter/ipset/ip_set_core.c:1211 suspicious rcu_dereference_protected() usage! [ 62.345443][ T62] [ 62.345443][ T62] other info that might help us debug this: [ 62.345443][ T62] [ 62.355749][ T62] [ 62.355749][ T62] rcu_scheduler_act