============================= WARNING: suspicious RCU usage 4.14.307-syzkaller #0 Not tainted ----------------------------- net/sched/act_sample.c:95 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor.0/10286: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317 stack backtrace: CPU: 0 PID: 10286 Comm: syz-executor.0 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 tcf_sample_init+0x71c/0x8c0 net/sched/act_sample.c:95 tcf_action_init_1+0x51a/0x9e0 net/sched/act_api.c:691 tcf_action_init+0x26d/0x400 net/sched/act_api.c:760 tcf_action_add net/sched/act_api.c:1088 [inline] tc_ctl_action+0x2e3/0x510 net/sched/act_api.c:1140 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f80c70390f9 RSP: 002b:00007f80c55ab168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f80c7158f80 RCX: 00007f80c70390f9 RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 RBP: 00007f80c7094ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe7b2b843f R14: 00007f80c55ab300 R15: 0000000000022000 f2fs_msg: 2 callbacks suppressed F2FS-fs (loop1): Found nat_bits in checkpoint F2FS-fs (loop1): Mounted with checkpoint version = 48b305e5 Zero length message leads to an empty skb EXT4-fs warning (device sda1): verify_group_input:146: Cannot add at group 9 (only 16 groups) netlink: 176 bytes leftover after parsing attributes in process `syz-executor.4'. sch_tbf: peakrate 7 is lower than or equals to rate 8 ! (syz-executor.1,10415,0):dlmfs_mkdir:481 ERROR: invalid domain name for directory. sch_tbf: peakrate 7 is lower than or equals to rate 8 ! o2cb: This node has not been configured. o2cb: Cluster check failed. Fix errors before retrying. (syz-executor.1,10415,0):user_dlm_register:695 ERROR: status = -22 (syz-executor.1,10415,0):dlmfs_mkdir:497 ERROR: Error -22 could not register domain "file0" sch_tbf: peakrate 7 is lower than or equals to rate 8 ! (syz-executor.1,10435,1):dlmfs_mkdir:481 ERROR: invalid domain name for directory. o2cb: This node has not been configured. o2cb: Cluster check failed. Fix errors before retrying. (syz-executor.1,10439,1):user_dlm_register:695 ERROR: status = -22 (syz-executor.1,10439,1):dlmfs_mkdir:497 ERROR: Error -22 could not register domain "file0" sch_tbf: peakrate 7 is lower than or equals to rate 8 ! (syz-executor.1,10457,1):dlmfs_mkdir:481 ERROR: invalid domain name for directory. o2cb: This node has not been configured. o2cb: Cluster check failed. Fix errors before retrying. (syz-executor.1,10464,0):user_dlm_register:695 ERROR: status = -22 (syz-executor.1,10464,0):dlmfs_mkdir:497 ERROR: Error -22 could not register domain "file0" (syz-executor.1,10488,0):dlmfs_mkdir:481 ERROR: invalid domain name for directory. o2cb: This node has not been configured. o2cb: Cluster check failed. Fix errors before retrying. (syz-executor.1,10491,0):user_dlm_register:695 ERROR: status = -22 (syz-executor.1,10491,0):dlmfs_mkdir:497 ERROR: Error -22 could not register domain "file0" (syz-executor.1,10543,1):dlmfs_mkdir:481 ERROR: invalid domain name for directory. o2cb: This node has not been configured. unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 o2cb: Cluster check failed. Fix errors before retrying. (syz-executor.1,10546,0):user_dlm_register:695 ERROR: status = -22 (syz-executor.1,10546,0):dlmfs_mkdir:497 ERROR: Error -22 could not register domain "file0" (syz-executor.1,10573,1):dlmfs_mkdir:481 ERROR: invalid domain name for directory. o2cb: This node has not been configured. o2cb: Cluster check failed. Fix errors before retrying. (syz-executor.1,10576,1):user_dlm_register:695 ERROR: status = -22 (syz-executor.1,10576,1):dlmfs_mkdir:497 ERROR: Error -22 could not register domain "file0" audit: type=1400 audit(1677375415.109:3): apparmor="DENIED" operation="change_onexec" info="label not found" error=-2 profile="unconfined" name=3A5D28242A3A0A28 pid=10582 comm="syz-executor.0" (syz-executor.1,10592,0):dlmfs_mkdir:481 ERROR: invalid domain name for directory. o2cb: This node has not been configured. o2cb: Cluster check failed. Fix errors before retrying. (syz-executor.1,10594,0):user_dlm_register:695 ERROR: status = -22 (syz-executor.1,10594,0):dlmfs_mkdir:497 ERROR: Error -22 could not register domain "file0"