============================= WARNING: suspicious RCU usage 4.19.0-rc2+ #221 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-executor2/17876: #0: 00000000780613bb (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1491 [inline] #0: 00000000780613bb (sk_lock-AF_INET6){+.+.}, at: inet_csk_accept+0xba/0xe70 net/ipv4/inet_connection_sock.c:442 stack backtrace: CPU: 1 PID: 17876 Comm: syz-executor2 Not tainted 4.19.0-rc2+ #221 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+0x1c9/0x2b4 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x14a/0x153 kernel/locking/lockdep.c:4537 ireq_opt_deref include/net/inet_sock.h:135 [inline] inet_csk_route_req+0x96b/0xdb0 net/ipv4/inet_connection_sock.c:547 dccp_v4_send_response+0xb4/0x6d0 net/dccp/ipv4.c:485 dccp_v4_conn_request+0xc66/0x1370 net/dccp/ipv4.c:634 dccp_v6_conn_request+0xdad/0x1650 net/dccp/ipv6.c:317 dccp_rcv_state_process+0x6f7/0x1a30 net/dccp/input.c:612 dccp_v4_do_rcv+0x102/0x180 net/dccp/ipv4.c:683 dccp_v6_do_rcv+0x946/0xb80 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+0x14c/0xa40 net/ipv4/af_inet.c:734 __sys_accept4+0x3b2/0x8a0 net/socket.c:1588 __do_sys_accept net/socket.c:1629 [inline] __se_sys_accept net/socket.c:1626 [inline] __x64_sys_accept+0x75/0xb0 net/socket.c:1626 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 Code: fd 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1603b30c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 00007f1603b316d4 RCX: 0000000000457099 RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 0000000000930280 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cb0e0 R14: 00000000004c2d44 R15: 0000000000000003 ============================= dccp_close: ABORT with 1061 bytes unread WARNING: suspicious RCU usage 4.19.0-rc2+ #221 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-executor2/17876: #0: 00000000780613bb (sk_lock-AF_INET6){+.+.}, at: lock_sock include/net/sock.h:1491 [inline] #0: 00000000780613bb (sk_lock-AF_INET6){+.+.}, at: inet_csk_accept+0xba/0xe70 net/ipv4/inet_connection_sock.c:442 stack backtrace: CPU: 1 PID: 17876 Comm: syz-executor2 Not tainted 4.19.0-rc2+ #221 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+0x1c9/0x2b4 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x14a/0x153 kernel/locking/lockdep.c:4537 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+0xc66/0x1370 net/dccp/ipv4.c:634 dccp_v6_conn_request+0xdad/0x1650 net/dccp/ipv6.c:317 dccp_rcv_state_process+0x6f7/0x1a30 net/dccp/input.c:612 dccp_v4_do_rcv+0x102/0x180 net/dccp/ipv4.c:683 dccp_v6_do_rcv+0x946/0xb80 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+0x14c/0xa40 net/ipv4/af_inet.c:734 __sys_accept4+0x3b2/0x8a0 net/socket.c:1588 __do_sys_accept net/socket.c:1629 [inline] __se_sys_accept net/socket.c:1626 [inline] __x64_sys_accept+0x75/0xb0 net/socket.c:1626 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 Code: fd 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1603b30c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 00007f1603b316d4 RCX: 0000000000457099 RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 0000000000930280 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cb0e0 R14: 00000000004c2d44 R15: 0000000000000003 print_req_error: I/O error, dev loop0, sector 128 Buffer I/O error on dev loop0, logical block 16, lost async page write netlink: 13 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 13 bytes leftover after parsing attributes in process `syz-executor1'. QAT: Invalid ioctl QAT: Invalid ioctl dccp_close: ABORT with 1061 bytes unread dccp_check_seqno: Step 6 failed for RESET packet, (LSWL(100812329382717) <= P.seqno(0) <= S.SWH(100812329382791)) and (P.ackno exists or LAWL(183762036142694) <= P.ackno(183762036142696) <= S.AWH(183762036142696), sending SYNC... Option 'D' to dns_resolver key: bad/missing value Option 'D' to dns_resolver key: bad/missing value QAT: Invalid ioctl QAT: Invalid ioctl hid-generic 0000:0000:0000.0006: hidraw0: HID v0.00 Device [syz0] on syz1 hid-generic 0000:0000:0000.0007: hidraw0: HID v0.00 Device [syz0] on syz1 netlink: 220 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 220 bytes leftover after parsing attributes in process `syz-executor0'.