===================================== WARNING: bad unlock balance detected! 5.0.0-rc4-next-20190201 #25 Not tainted ------------------------------------- syz-executor4/7764 is trying to release lock (sk_lock-AF_RXRPC) at: [] rxrpc_recvmsg+0x6d3/0x3099 net/rxrpc/recvmsg.c:598 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz-executor4/7764: #0: 00000000a0e9e22a (slock-AF_RXRPC){+...}, at: spin_lock_bh include/linux/spinlock.h:334 [inline] #0: 00000000a0e9e22a (slock-AF_RXRPC){+...}, at: release_sock+0x20/0x1c0 net/core/sock.c:2823 stack backtrace: CPU: 0 PID: 7764 Comm: syz-executor4 Not tainted 5.0.0-rc4-next-20190201 #25 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+0x172/0x1f0 lib/dump_stack.c:113 print_unlock_imbalance_bug kernel/locking/lockdep.c:3373 [inline] print_unlock_imbalance_bug.cold+0x114/0x123 kernel/locking/lockdep.c:3350 __lock_release kernel/locking/lockdep.c:3586 [inline] lock_release+0x67e/0xa00 kernel/locking/lockdep.c:3845 sock_release_ownership include/net/sock.h:1471 [inline] release_sock+0x183/0x1c0 net/core/sock.c:2833 rxrpc_recvmsg+0x6d3/0x3099 net/rxrpc/recvmsg.c:598 sock_recvmsg_nosec net/socket.c:794 [inline] sock_recvmsg net/socket.c:801 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:797 __sys_recvfrom+0x1ff/0x350 net/socket.c:1843 __do_sys_recvfrom net/socket.c:1861 [inline] __se_sys_recvfrom net/socket.c:1857 [inline] __x64_sys_recvfrom+0xe1/0x1a0 net/socket.c:1857 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e39 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f17bed75c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002d RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457e39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f17bed766d4 R13: 00000000004c4ac2 R14: 00000000004d8450 R15: 00000000ffffffff