============================= WARNING: suspicious RCU usage 4.19.0-rc5+ #260 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-executor3/8801: #0: 0000000058c1fdb3 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1491 [inline] #0: 0000000058c1fdb3 (sk_lock-AF_INET6){+.+.}, at: inet_csk_accept+0xba/0xe70 net/ipv4/inet_connection_sock.c:442 stack backtrace: CPU: 0 PID: 8801 Comm: syz-executor3 Not tainted 4.19.0-rc5+ #260 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:931 [inline] __release_sock+0x12f/0x3a0 net/core/sock.c:2336 release_sock+0xad/0x2c0 net/core/sock.c:2849 inet_csk_wait_for_connect net/ipv4/inet_connection_sock.c:409 [inline] inet_csk_accept+0x4f8/0xe70 net/ipv4/inet_connection_sock.c:460 inet_accept+0x14b/0x9e0 net/ipv4/af_inet.c:734 __sys_accept4+0x3b2/0x8a0 net/socket.c:1590 __do_sys_accept net/socket.c:1631 [inline] __se_sys_accept net/socket.c:1628 [inline] __x64_sys_accept+0x75/0xb0 net/socket.c:1628 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:00007ffb7dc0ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579 RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffb7dc0f6d4 R13: 00000000004bd53a R14: 00000000004cbc20 R15: 00000000ffffffff ============================= WARNING: suspicious RCU usage 4.19.0-rc5+ #260 Not tainted netlink: 20 bytes leftover after parsing attributes in process `syz-executor1'. ----------------------------- 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-executor3/8801: #0: 0000000058c1fdb3 (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1491 [inline] #0: 0000000058c1fdb3 (sk_lock-AF_INET6){+.+.}, at: inet_csk_accept+0xba/0xe70 net/ipv4/inet_connection_sock.c:442 stack backtrace: CPU: 0 PID: 8801 Comm: syz-executor3 Not tainted 4.19.0-rc5+ #260 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:931 [inline] __release_sock+0x12f/0x3a0 net/core/sock.c:2336 release_sock+0xad/0x2c0 net/core/sock.c:2849 inet_csk_wait_for_connect net/ipv4/inet_connection_sock.c:409 [inline] inet_csk_accept+0x4f8/0xe70 net/ipv4/inet_connection_sock.c:460 inet_accept+0x14b/0x9e0 net/ipv4/af_inet.c:734 __sys_accept4+0x3b2/0x8a0 net/socket.c:1590 __do_sys_accept net/socket.c:1631 [inline] __se_sys_accept net/socket.c:1628 [inline] __x64_sys_accept+0x75/0xb0 net/socket.c:1628 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:00007ffb7dc0ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579 RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffb7dc0f6d4 R13: 00000000004bd53a R14: 00000000004cbc20 R15: 00000000ffffffff bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state bridge0: port 1(bridge_slave_0) entered blocking state dccp_close: ABORT with 4096 bytes unread bridge0: port 1(bridge_slave_0) entered forwarding state device bridge0 entered promiscuous mode dccp_close: ABORT with 4096 bytes unread IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state device bridge0 left promiscuous mode bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered forwarding state device bridge0 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready 9pnet: Insufficient options for proto=fd sd 0:0:1:0: [sg0] tag#7596 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#7596 CDB: opcode=0xc2 (vendor) sd 0:0:1:0: [sg0] tag#7596 CDB[00]: c2 b7 01 e1 66 11 0e 93 14 c7 e7 51 e4 14 c1 29 sd 0:0:1:0: [sg0] tag#7596 CDB[10]: 37 49 8b ad 70 2b 12 50 89 1d a9 ea 83 2e e5 22 sd 0:0:1:0: [sg0] tag#7596 CDB[20]: b8 IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd syz-executor0 (8939) used greatest stack depth: 9416 bytes left EXT4-fs warning (device sda1): ext4_resize_fs:1917: can't read last block, resize aborted EXT4-fs warning (device sda1): ext4_resize_fs:1917: can't read last block, resize aborted netlink: 'syz-executor1': attribute type 29 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 'syz-executor1': attribute type 29 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 'syz-executor1': attribute type 29 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 'syz-executor1': attribute type 29 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 'syz-executor1': attribute type 1 has an invalid length. netlink: 'syz-executor1': attribute type 1 has an invalid length. EXT4-fs (sda1): Ignoring removed mblk_io_submit option EXT4-fs (sda1): re-mounted. Opts: mblk_io_submit, device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state