================================ WARNING: inconsistent lock state 5.5.0-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. blkid/11743 [HC0[0]:SC1[1]:HE1:SE0] takes: ffffffff8a8c8538 (rxrpc_conn_id_lock){+.?.}, at: spin_lock include/linux/spinlock.h:338 [inline] ffffffff8a8c8538 (rxrpc_conn_id_lock){+.?.}, at: rxrpc_put_client_connection_id net/rxrpc/conn_client.c:138 [inline] ffffffff8a8c8538 (rxrpc_conn_id_lock){+.?.}, at: rxrpc_put_client_connection_id+0x73/0xe0 net/rxrpc/conn_client.c:135 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] rxrpc_get_client_connection_id net/rxrpc/conn_client.c:109 [inline] rxrpc_alloc_client_connection net/rxrpc/conn_client.c:193 [inline] rxrpc_get_client_conn net/rxrpc/conn_client.c:340 [inline] rxrpc_connect_call+0x954/0x4e30 net/rxrpc/conn_client.c:701 rxrpc_new_client_call+0x9c0/0x1ad0 net/rxrpc/call_object.c:290 rxrpc_new_client_call_for_sendmsg net/rxrpc/sendmsg.c:595 [inline] rxrpc_do_sendmsg+0xffa/0x1d5f net/rxrpc/sendmsg.c:652 rxrpc_sendmsg+0x4d6/0x5f0 net/rxrpc/af_rxrpc.c:586 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:672 ____sys_sendmsg+0x358/0x880 net/socket.c:2343 ___sys_sendmsg+0x100/0x170 net/socket.c:2397 __sys_sendmmsg+0x1bf/0x4d0 net/socket.c:2487 __do_sys_sendmmsg net/socket.c:2516 [inline] __se_sys_sendmmsg net/socket.c:2513 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2513 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 1616 hardirqs last enabled at (1616): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (1616): [] _raw_spin_unlock_irqrestore+0x66/0xe0 kernel/locking/spinlock.c:191 hardirqs last disabled at (1615): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1615): [] _raw_spin_lock_irqsave+0x6f/0xcd kernel/locking/spinlock.c:159 softirqs last enabled at (1058): [] copy_init_fpstate_to_fpregs arch/x86/kernel/fpu/core.c:308 [inline] softirqs last enabled at (1058): [] fpu__clear+0x17c/0x440 arch/x86/kernel/fpu/core.c:332 softirqs last disabled at (1583): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (1583): [] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(rxrpc_conn_id_lock); lock(rxrpc_conn_id_lock); *** DEADLOCK *** 2 locks held by blkid/11743: #0: ffff88809579b658 (&mm->mmap_sem#2){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1383 [inline] #0: ffff88809579b658 (&mm->mmap_sem#2){++++}, at: do_page_fault+0x34b/0x12e1 arch/x86/mm/fault.c:1517 #1: ffffffff89babac0 (rcu_callback){....}, at: rcu_do_batch kernel/rcu/tree.c:2176 [inline] #1: ffffffff89babac0 (rcu_callback){....}, at: rcu_core+0x562/0x1390 kernel/rcu/tree.c:2410 stack backtrace: CPU: 1 PID: 11743 Comm: blkid Not tainted 5.5.0-syzkaller #0 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+0x197/0x210 lib/dump_stack.c:118 print_usage_bug.cold+0x327/0x378 kernel/locking/lockdep.c:3100 valid_state kernel/locking/lockdep.c:3111 [inline] mark_lock_irq kernel/locking/lockdep.c:3308 [inline] mark_lock+0xbb4/0x1220 kernel/locking/lockdep.c:3665 mark_usage kernel/locking/lockdep.c:3565 [inline] __lock_acquire+0x1e8e/0x4a00 kernel/locking/lockdep.c:3908 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] rxrpc_put_client_connection_id net/rxrpc/conn_client.c:138 [inline] rxrpc_put_client_connection_id+0x73/0xe0 net/rxrpc/conn_client.c:135 rxrpc_put_one_client_conn net/rxrpc/conn_client.c:955 [inline] rxrpc_put_client_conn+0x243/0xc90 net/rxrpc/conn_client.c:1001 rxrpc_put_connection net/rxrpc/ar-internal.h:965 [inline] rxrpc_rcu_destroy_call+0xbd/0x200 net/rxrpc/call_object.c:572 rcu_do_batch kernel/rcu/tree.c:2186 [inline] rcu_core+0x5e1/0x1390 kernel/rcu/tree.c:2410 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2419 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:atomic64_read include/asm-generic/atomic-instrumented.h:836 [inline] RIP: 0010:atomic_long_read include/asm-generic/atomic-long.h:28 [inline] RIP: 0010:rwsem_owner kernel/locking/rwsem.c:288 [inline] RIP: 0010:__up_write kernel/locking/rwsem.c:1458 [inline] RIP: 0010:up_write+0x90/0x490 kernel/locking/rwsem.c:1587 Code: 8d 6c 24 60 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 52 02 00 00 4d 3b 64 24 60 0f 85 e0 00 00 00 08 00 00 00 4c 89 f7 e8 23 1a 5a 00 4c 89 f2 48 b8 00 00 00 00 RSP: 0000:ffffc90005397c78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff88809579b540 RCX: 1ffff1100ba30d71 RDX: 1ffff11014e85357 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffffc90005397cb8 R08: 0000000000000002 R09: ffff88805d186b90 R10: fffffbfff154a148 R11: ffffffff8aa50a47 R12: ffff8880a7429a58 R13: ffff8880a7429ab8 R14: ffff8880a7429a60 R15: ffffffff8aa53c30 anon_vma_unlock_write include/linux/rmap.h:125 [inline] __anon_vma_prepare+0x184/0x3c0 mm/rmap.c:209 anon_vma_prepare include/linux/rmap.h:153 [inline] do_cow_fault mm/memory.c:3689 [inline] do_fault mm/memory.c:3804 [inline] handle_pte_fault mm/memory.c:4033 [inline] __handle_mm_fault+0x28c6/0x3cc0 mm/memory.c:4163 handle_mm_fault+0x3b2/0xa50 mm/memory.c:4200 do_user_addr_fault arch/x86/mm/fault.c:1442 [inline] do_page_fault+0x545/0x12e1 arch/x86/mm/fault.c:1517 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1203 RIP: 0033:0x7f73cc57b2d6 Code: ff ff 48 89 57 80 48 89 57 88 48 89 57 90 48 89 57 98 48 89 57 a0 48 89 57 a8 48 89 57 b0 48 89 57 b8 48 89 57 c0 48 89 57 c8 <48> 89 57 d0 48 89 57 d8 48 89 57 e0 48 89 57 e8 48 89 57 f0 48 89 RSP: 002b:00007fffa28c75a8 EFLAGS: 00010202 RAX: 00007f73cc563878 RBX: 00007f73cc7824c8 RCX: 000000000000008a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f73cc5638a8 RBP: 00007fffa28c7870 R08: 0000000000000030 R09: 0101010101010101 R10: 00007f73cc5638a8 R11: 00007f73cc57b2d6 R12: 00007fffa28c7958 R13: 0000000000000002 R14: 00007fffa28c7620 R15: 00007fffa28c75f0 TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters.