================================ WARNING: inconsistent lock state 4.14.172-syzkaller #0 Not tainted binder: 21058:21059 ioctl c0306201 20000080 returned -14 -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. udevd/21686 [HC0[0]:SC1[1]:HE1:SE0] takes: (rxrpc_conn_id_lock){+.?.}, at: [] spin_lock include/linux/spinlock.h:317 [inline] (rxrpc_conn_id_lock){+.?.}, at: [] rxrpc_put_client_connection_id.part.0+0x15/0x70 net/rxrpc/conn_client.c:143 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3994 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] rxrpc_get_client_connection_id net/rxrpc/conn_client.c:114 [inline] rxrpc_alloc_client_connection net/rxrpc/conn_client.c:198 [inline] rxrpc_get_client_conn net/rxrpc/conn_client.c:342 [inline] rxrpc_connect_call+0x7eb/0x3e50 net/rxrpc/conn_client.c:692 rxrpc_new_client_call+0x8d2/0x1410 net/rxrpc/call_object.c:276 rxrpc_new_client_call_for_sendmsg net/rxrpc/sendmsg.c:525 [inline] rxrpc_do_sendmsg+0x8a1/0x1019 net/rxrpc/sendmsg.c:577 rxrpc_sendmsg+0x47d/0x5a0 net/rxrpc/af_rxrpc.c:543 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xc5/0x100 net/socket.c:656 ___sys_sendmsg+0x349/0x840 net/socket.c:2062 __sys_sendmmsg+0x129/0x330 net/socket.c:2152 SYSC_sendmmsg net/socket.c:2183 [inline] SyS_sendmmsg+0x2f/0x50 net/socket.c:2178 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 irq event stamp: 16099652 hardirqs last enabled at (16099652): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (16099652): [] _raw_spin_unlock_irqrestore+0x67/0xe0 kernel/locking/spinlock.c:192 hardirqs last disabled at (16099651): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (16099651): [] _raw_spin_lock_irqsave+0x66/0xbf kernel/locking/spinlock.c:160 softirqs last enabled at (16097410): [] __do_softirq+0x664/0x9bf kernel/softirq.c:314 binder: 21062:21064 ioctl c0306201 20000080 returned -14 softirqs last disabled at (16099625): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (16099625): [] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 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 udevd/21686: #0: (rcu_callback){....}, at: [] __rcu_reclaim kernel/rcu/rcu.h:185 [inline] #0: (rcu_callback){....}, at: [] rcu_do_batch kernel/rcu/tree.c:2699 [inline] #0: (rcu_callback){....}, at: [] invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline] #0: (rcu_callback){....}, at: [] __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline] #0: (rcu_callback){....}, at: [] rcu_process_callbacks+0x866/0x1190 kernel/rcu/tree.c:2946 stack backtrace: CPU: 0 PID: 21686 Comm: udevd Not tainted 4.14.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 print_usage_bug.cold+0x327/0x425 kernel/locking/lockdep.c:2585 valid_state kernel/locking/lockdep.c:2598 [inline] mark_lock_irq kernel/locking/lockdep.c:2792 [inline] mark_lock+0xd21/0x10b0 kernel/locking/lockdep.c:3190 mark_irqflags kernel/locking/lockdep.c:3068 [inline] __lock_acquire+0xb57/0x4620 kernel/locking/lockdep.c:3444 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3994 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 binder: 21069:21071 ioctl c0306201 20000080 returned -14 spin_lock include/linux/spinlock.h:317 [inline] rxrpc_put_client_connection_id.part.0+0x15/0x70 net/rxrpc/conn_client.c:143 rxrpc_put_client_connection_id include/linux/spinlock.h:358 [inline] rxrpc_put_one_client_conn net/rxrpc/conn_client.c:912 [inline] rxrpc_put_client_conn+0x550/0xa80 net/rxrpc/conn_client.c:957 rxrpc_put_connection net/rxrpc/ar-internal.h:862 [inline] rxrpc_rcu_destroy_call+0x83/0x190 net/rxrpc/call_object.c:642 __rcu_reclaim kernel/rcu/rcu.h:195 [inline] rcu_do_batch kernel/rcu/tree.c:2699 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline] rcu_process_callbacks+0x792/0x1190 kernel/rcu/tree.c:2946 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_release+0x41e/0x7f0 kernel/locking/lockdep.c:4016 RSP: 0018:ffff88802535f788 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2ce1 RBX: 1ffff11004a6bef5 RCX: 1ffff11009a6e126 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffff88804d3700c0 R08: 0000000000000001 R09: 0000000000000000 R10: ffffed1004a6bf25 R11: 0000000000000003 R12: ffffffff82c31ab0 R13: 0000000000000003 R14: ffff88804d3700c0 R15: 0000000000000001 rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:685 [inline] avc_has_perm_noaudit+0x297/0x400 security/selinux/avc.c:1118 selinux_inode_permission+0x2db/0x4a0 security/selinux/hooks.c:3106 security_inode_permission+0xaa/0xf0 security/security.c:698 __inode_permission fs/namei.c:434 [inline] __inode_permission+0xd6/0x300 fs/namei.c:406 inode_permission+0x23/0x100 fs/namei.c:476 may_lookup fs/namei.c:1717 [inline] link_path_walk+0x75d/0xed0 fs/namei.c:2097 path_lookupat.isra.0+0xcb/0x7b0 fs/namei.c:2342 filename_lookup+0x18e/0x380 fs/namei.c:2377 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xd1/0x160 fs/stat.c:185 vfs_stat include/linux/fs.h:3060 [inline] SYSC_newstat+0x83/0xe0 fs/stat.c:337 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7fd640853c65 RSP: 002b:00007ffe9501bb38 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 00000000006e17d8 RCX: 00007fd640853c65 RDX: 00007ffe9501bbb0 RSI: 00007ffe9501bbb0 RDI: 00007ffe9501c040 RBP: 0000000000826ce0 R08: 00007ffe9501c440 R09: 00007ffe9501c060 R10: 7269762f73656369 R11: 0000000000000246 R12: 00000000006cea00 R13: 0000000000625500 R14: 0000000000696030 R15: 00000000006cea00 binder: 21078:21082 ioctl c0306201 20000080 returned -14 binder: 21207:21209 ioctl c0306201 0 returned -14 binder: 21219:21232 ioctl c0306201 0 returned -14 binder: 21243:21245 ioctl c0306201 0 returned -14