iwpm_register_pid: Unable to send a nlmsg (client = 2) infiniband syz1: RDMA CMA: cma_listen_on_dev, error -19 ====================================================== WARNING: possible circular locking dependency detected 5.6.0-rc2-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/8065 is trying to acquire lock: ffffffff8a74d740 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 but task is already holding lock: ffffffff8a5d27a0 (lock#3){+.+.}, at: cma_add_one+0x62f/0xbf0 drivers/infiniband/core/cma.c:4663 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (lock#3){+.+.}: __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x156/0x13c0 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 cma_netdev_callback+0xc6/0x380 drivers/infiniband/core/cma.c:4605 notifier_call_chain+0xc2/0x230 kernel/notifier.c:83 __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:1948 [inline] call_netdevice_notifiers_info+0xba/0x130 net/core/dev.c:1933 call_netdevice_notifiers_extack net/core/dev.c:1960 [inline] call_netdevice_notifiers+0x79/0xa0 net/core/dev.c:1974 bond_change_active_slave+0x8a8/0x2050 drivers/net/bonding/bond_main.c:944 bond_select_active_slave+0x276/0xae0 drivers/net/bonding/bond_main.c:986 bond_enslave+0x44ef/0x4af0 drivers/net/bonding/bond_main.c:1823 do_set_master net/core/rtnetlink.c:2468 [inline] do_set_master+0x1dd/0x240 net/core/rtnetlink.c:2441 __rtnl_newlink+0x13a3/0x1790 net/core/rtnetlink.c:3346 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3377 rtnetlink_rcv_msg+0x45e/0xaf0 net/core/rtnetlink.c:5440 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2478 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5458 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x59e/0x7e0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:672 ____sys_sendmsg+0x753/0x880 net/socket.c:2343 ___sys_sendmsg+0x100/0x170 net/socket.c:2397 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (rtnl_mutex){+.+.}: check_prev_add kernel/locking/lockdep.c:2475 [inline] check_prevs_add kernel/locking/lockdep.c:2580 [inline] validate_chain kernel/locking/lockdep.c:2970 [inline] __lock_acquire+0x2596/0x4a00 kernel/locking/lockdep.c:3954 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484 __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x156/0x13c0 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 siw_create_listen+0x9c8/0xed0 drivers/infiniband/sw/siw/siw_cm.c:1977 iw_cm_listen+0x16e/0x1f0 drivers/infiniband/core/iwcm.c:582 cma_iw_listen drivers/infiniband/core/cma.c:2450 [inline] rdma_listen+0x613/0x970 drivers/infiniband/core/cma.c:3614 cma_listen_on_dev+0x530/0x6a0 drivers/infiniband/core/cma.c:2501 cma_add_one+0x6fe/0xbf0 drivers/infiniband/core/cma.c:4666 add_client_context+0x3dd/0x550 drivers/infiniband/core/device.c:681 enable_device_and_get+0x1df/0x3c0 drivers/infiniband/core/device.c:1316 ib_register_device drivers/infiniband/core/device.c:1382 [inline] ib_register_device+0xa89/0xe40 drivers/infiniband/core/device.c:1343 siw_device_register drivers/infiniband/sw/siw/siw_main.c:70 [inline] siw_newlink drivers/infiniband/sw/siw/siw_main.c:565 [inline] siw_newlink+0xdef/0x1310 drivers/infiniband/sw/siw/siw_main.c:542 nldev_newlink+0x28a/0x430 drivers/infiniband/core/nldev.c:1538 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:195 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x5d9/0x980 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x59e/0x7e0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:672 ____sys_sendmsg+0x753/0x880 net/socket.c:2343 ___sys_sendmsg+0x100/0x170 net/socket.c:2397 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(lock#3); lock(rtnl_mutex); lock(lock#3); lock(rtnl_mutex); *** DEADLOCK *** 6 locks held by syz-executor.1/8065: #0: ffffffff8c3d4640 (&rdma_nl_types[idx].sem){.+.+}, at: rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:164 [inline] #0: ffffffff8c3d4640 (&rdma_nl_types[idx].sem){.+.+}, at: rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] #0: ffffffff8c3d4640 (&rdma_nl_types[idx].sem){.+.+}, at: rdma_nl_rcv+0x411/0x980 drivers/infiniband/core/netlink.c:259 #1: ffffffff8a5c8168 (link_ops_rwsem){++++}, at: nldev_newlink+0x248/0x430 drivers/infiniband/core/nldev.c:1528 #2: ffffffff8a5bbc88 (devices_rwsem){++++}, at: enable_device_and_get+0x110/0x3c0 drivers/infiniband/core/device.c:1306 #3: ffffffff8a5bbb48 (clients_rwsem){++++}, at: enable_device_and_get+0x173/0x3c0 drivers/infiniband/core/device.c:1314 #4: ffff88805b150538 (&device->client_data_rwsem){++++}, at: add_client_context+0x3ab/0x550 drivers/infiniband/core/device.c:679 #5: ffffffff8a5d27a0 (lock#3){+.+.}, at: cma_add_one+0x62f/0xbf0 drivers/infiniband/core/cma.c:4663 stack backtrace: CPU: 1 PID: 8065 Comm: syz-executor.1 Not tainted 5.6.0-rc2-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_circular_bug.isra.0.cold+0x163/0x172 kernel/locking/lockdep.c:1684 check_noncircular+0x32e/0x3e0 kernel/locking/lockdep.c:1808 check_prev_add kernel/locking/lockdep.c:2475 [inline] check_prevs_add kernel/locking/lockdep.c:2580 [inline] validate_chain kernel/locking/lockdep.c:2970 [inline] __lock_acquire+0x2596/0x4a00 kernel/locking/lockdep.c:3954 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484 __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x156/0x13c0 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 siw_create_listen+0x9c8/0xed0 drivers/infiniband/sw/siw/siw_cm.c:1977 iw_cm_listen+0x16e/0x1f0 drivers/infiniband/core/iwcm.c:582 cma_iw_listen drivers/infiniband/core/cma.c:2450 [inline] rdma_listen+0x613/0x970 drivers/infiniband/core/cma.c:3614 cma_listen_on_dev+0x530/0x6a0 drivers/infiniband/core/cma.c:2501 cma_add_one+0x6fe/0xbf0 drivers/infiniband/core/cma.c:4666 add_client_context+0x3dd/0x550 drivers/infiniband/core/device.c:681 enable_device_and_get+0x1df/0x3c0 drivers/infiniband/core/device.c:1316 ib_register_device drivers/infiniband/core/device.c:1382 [inline] ib_register_device+0xa89/0xe40 drivers/infiniband/core/device.c:1343 siw_device_register drivers/infiniband/sw/siw/siw_main.c:70 [inline] siw_newlink drivers/infiniband/sw/siw/siw_main.c:565 [inline] siw_newlink+0xdef/0x1310 drivers/infiniband/sw/siw/siw_main.c:542 nldev_newlink+0x28a/0x430 drivers/infiniband/core/nldev.c:1538 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:195 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x5d9/0x980 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x59e/0x7e0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:672 ____sys_sendmsg+0x753/0x880 net/socket.c:2343 ___sys_sendmsg+0x100/0x170 net/socket.c:2397 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c479 Code: ad b6 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa6669d5c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa6669d66d4 RCX: 000000000045c479 RDX: 0000000000000000 RSI: 00000000200031c0 RDI: 0000000000000005 RBP: 000000000076bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000009a3 R14: 00000000004d56e8 R15: 000000000076bfcc infiniband syz1: RDMA CMA: cma_listen_on_dev, error -22