================================ WARNING: inconsistent lock state 5.5.0-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.2/12271 [HC0[0]:SC1[1]:HE1:SE0] takes: ffffffff8a8c9db8 (rxrpc_conn_id_lock){+.?.}, at: spin_lock include/linux/spinlock.h:338 [inline] ffffffff8a8c9db8 (rxrpc_conn_id_lock){+.?.}, at: rxrpc_put_client_connection_id net/rxrpc/conn_client.c:138 [inline] ffffffff8a8c9db8 (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: 4336 hardirqs last enabled at (4336): [] trace_hardirqs_on_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:41 hardirqs last disabled at (4335): [] trace_hardirqs_off_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:42 softirqs last enabled at (3418): [] __do_softirq+0x6cd/0x98c kernel/softirq.c:319 softirqs last disabled at (4311): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (4311): [] 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 *** 1 lock held by syz-executor.2/12271: #0: ffffffff89bac140 (rcu_callback){....}, at: rcu_do_batch kernel/rcu/tree.c:2176 [inline] #0: ffffffff89bac140 (rcu_callback){....}, at: rcu_core+0x562/0x1390 kernel/rcu/tree.c:2410 stack backtrace: CPU: 1 PID: 12271 Comm: syz-executor.2 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:check_kcov_mode kernel/kcov.c:153 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x50 kernel/kcov.c:187 Code: 8b 80 98 13 00 00 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 65 48 8b 04 25 c0 1e 02 00 65 8b 15 34 a7 8c 7e <81> e2 00 01 1f 00 48 8b 75 08 75 2b 8b 90 80 13 00 00 83 fa 02 75 RSP: 0018:ffffc90017607c00 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: ffff88804cb02000 RBX: ffffc90017607c90 RCX: 1ffffffff170fc6c RDX: 0000000080000002 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffffc90017607c00 R08: 1ffff11015d2707b R09: ffffed1015d2707c R10: ffffed1015d2707b R11: ffff8880ae9383db R12: ffff8880aa5f8a80 R13: ffffffff81c2fadf R14: 0000000000000282 R15: ffffc90017607df8 check_preemption_disabled lib/smp_processor_id.c:14 [inline] debug_smp_processor_id+0xc/0x18a lib/smp_processor_id.c:57 rcu_lockdep_current_cpu_online kernel/rcu/tree.c:967 [inline] rcu_lockdep_current_cpu_online+0x39/0x130 kernel/rcu/tree.c:958 rcu_read_lock_held_common kernel/rcu/update.c:108 [inline] rcu_read_lock_held_common+0xbd/0x130 kernel/rcu/update.c:98 rcu_read_lock_sched_held+0x5b/0xd0 kernel/rcu/update.c:119 trace_kmem_cache_free include/trace/events/kmem.h:145 [inline] kmem_cache_free+0x26b/0x320 mm/slab.c:3697 putname+0xef/0x130 fs/namei.c:259 do_sys_openat2+0x4c7/0x7e0 fs/open.c:1158 do_sys_open+0xf2/0x180 fs/open.c:1165 ksys_open include/linux/syscalls.h:1386 [inline] __do_sys_open fs/open.c:1171 [inline] __se_sys_open fs/open.c:1169 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1169 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x415131 Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f786ffe7bb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f786ffe86d4 RCX: 0000000000415131 RDX: 00007f786ffe7be3 RSI: 0000000000000002 RDI: 00007f786ffe7bd0 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000013 R10: 0000000000000008 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000be6 R14: 00000000004cccd7 R15: 000000000075bf2c