============================= WARNING: suspicious RCU usage 4.19.0-rc5+ #241 Not tainted ----------------------------- include/net/inet_sock.h:136 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor5/12178: #0: 0000000068c0c2d6 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1492 [inline] #0: 0000000068c0c2d6 (sk_lock-AF_INET6){+.+.}, at: inet_dccp_listen+0x45/0x230 net/dccp/proto.c:941 stack backtrace: CPU: 0 PID: 12178 Comm: syz-executor5 Not tainted 4.19.0-rc5+ #241 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x14a/0x153 kernel/locking/lockdep.c:4536 ireq_opt_deref include/net/inet_sock.h:135 [inline] inet_csk_route_req+0x977/0xde0 net/ipv4/inet_connection_sock.c:547 dccp_v4_send_response+0xb4/0x6d0 net/dccp/ipv4.c:485 dccp_v4_conn_request+0xc81/0x1390 net/dccp/ipv4.c:634 dccp_v6_conn_request+0xdb9/0x1660 net/dccp/ipv6.c:317 dccp_rcv_state_process+0x6f7/0x1a32 net/dccp/input.c:612 dccp_v4_do_rcv+0x102/0x180 net/dccp/ipv4.c:683 dccp_v6_do_rcv+0x99d/0xbf0 net/dccp/ipv6.c:579 sk_backlog_rcv include/net/sock.h:932 [inline] __release_sock+0x12f/0x3a0 net/core/sock.c:2336 release_sock+0xad/0x2c0 net/core/sock.c:2849 inet_dccp_listen+0x153/0x230 net/dccp/proto.c:967 __sys_listen+0x1d6/0x380 net/socket.c:1517 __do_sys_listen net/socket.c:1526 [inline] __se_sys_listen net/socket.c:1524 [inline] __x64_sys_listen+0x54/0x80 net/socket.c:1524 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f00d97f3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000032 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f00d97f46d4 R13: 00000000004c26e0 R14: 00000000004d3858 R15: 00000000ffffffff ============================= WARNING: suspicious RCU usage 4.19.0-rc5+ #241 Not tainted ----------------------------- include/net/inet_sock.h:136 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor5/12178: #0: 0000000068c0c2d6 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1492 [inline] #0: 0000000068c0c2d6 (sk_lock-AF_INET6){+.+.}, at: inet_dccp_listen+0x45/0x230 net/dccp/proto.c:941 stack backtrace: CPU: 0 PID: 12178 Comm: syz-executor5 Not tainted 4.19.0-rc5+ #241 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x14a/0x153 kernel/locking/lockdep.c:4536 ireq_opt_deref include/net/inet_sock.h:135 [inline] dccp_v4_send_response+0x537/0x6d0 net/dccp/ipv4.c:496 dccp_v4_conn_request+0xc81/0x1390 net/dccp/ipv4.c:634 dccp_v6_conn_request+0xdb9/0x1660 net/dccp/ipv6.c:317 dccp_rcv_state_process+0x6f7/0x1a32 net/dccp/input.c:612 dccp_v4_do_rcv+0x102/0x180 net/dccp/ipv4.c:683 dccp_v6_do_rcv+0x99d/0xbf0 net/dccp/ipv6.c:579 sk_backlog_rcv include/net/sock.h:932 [inline] __release_sock+0x12f/0x3a0 net/core/sock.c:2336 release_sock+0xad/0x2c0 net/core/sock.c:2849 inet_dccp_listen+0x153/0x230 net/dccp/proto.c:967 __sys_listen+0x1d6/0x380 net/socket.c:1517 __do_sys_listen net/socket.c:1526 [inline] __se_sys_listen net/socket.c:1524 [inline] __x64_sys_listen+0x54/0x80 net/socket.c:1524 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f00d97f3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000032 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f00d97f46d4 R13: 00000000004c26e0 R14: 00000000004d3858 R15: 00000000ffffffff device veth0_to_bridge entered promiscuous mode device veth0_to_bridge left promiscuous mode device veth0_to_bridge entered promiscuous mode device veth0_to_bridge left promiscuous mode x_tables: eb_tables: physdev.0 match: invalid size 72 (kernel) != (user) 112 netlink: 28 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor4'. EXT4-fs warning (device sda1): ext4_group_extend:1762: can't shrink FS - resize aborted netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor4'. EXT4-fs warning (device sda1): ext4_group_extend:1762: can't shrink FS - resize aborted EXT4-fs warning (device sda1): ext4_group_extend:1762: can't shrink FS - resize aborted nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. netlink: 20 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 'syz-executor5': attribute type 4 has an invalid length. netlink: 'syz-executor5': attribute type 4 has an invalid length. ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:0000:00bb with DS=0x3 sctp: [Deprecated]: syz-executor3 (pid 12741) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:0000:00bb with DS=0x3 sctp: [Deprecated]: syz-executor3 (pid 12741) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead 8021q: adding VLAN 0 to HW filter on device team0 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 netlink: 'syz-executor3': attribute type 39 has an invalid length. netlink: 'syz-executor3': attribute type 16 has an invalid length.