wlan1 speed is unknown, defaulting to 1000 wlan1 speed is unknown, defaulting to 1000 wlan1 speed is unknown, defaulting to 1000 iwpm_register_pid: Unable to send a nlmsg (client = 2) infiniband syz1: RDMA CMA: cma_listen_on_dev, error -98 ============================================ WARNING: possible recursive locking detected 5.10.0-rc5-next-20201126-syzkaller #0 Not tainted -------------------------------------------- syz-executor.0/4379 is trying to acquire lock: ffffffff8c695668 (lock#6){+.+.}-{3:3}, at: cma_release_dev drivers/infiniband/core/cma.c:476 [inline] ffffffff8c695668 (lock#6){+.+.}-{3:3}, at: _destroy_id+0x299/0xa00 drivers/infiniband/core/cma.c:1852 but task is already holding lock: ffffffff8c695668 (lock#6){+.+.}-{3:3}, at: cma_add_one+0x556/0xcd0 drivers/infiniband/core/cma.c:4902 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(lock#6); lock(lock#6); *** DEADLOCK *** May be due to missing lock nesting notation 6 locks held by syz-executor.0/4379: #0: ffffffff8fad8d38 (&rdma_nl_types[idx].sem){.+.+}-{3:3}, at: rdma_nl_rcv_msg+0x15b/0x690 drivers/infiniband/core/netlink.c:164 #1: ffffffff8c67d310 (link_ops_rwsem){++++}-{3:3}, at: nldev_newlink+0x261/0x540 drivers/infiniband/core/nldev.c:1545 #2: ffffffff8c66cbd0 (devices_rwsem){++++}-{3:3}, at: enable_device_and_get+0xfc/0x3c0 drivers/infiniband/core/device.c:1302 #3: ffffffff8c66ca90 (clients_rwsem){++++}-{3:3}, at: enable_device_and_get+0x163/0x3c0 drivers/infiniband/core/device.c:1312 #4: ffff8880776a4598 (&device->client_data_rwsem){++++}-{3:3}, at: add_client_context+0x3d0/0x5e0 drivers/infiniband/core/device.c:710 #5: ffffffff8c695668 (lock#6){+.+.}-{3:3}, at: cma_add_one+0x556/0xcd0 drivers/infiniband/core/cma.c:4902 stack backtrace: CPU: 1 PID: 4379 Comm: syz-executor.0 Not tainted 5.10.0-rc5-next-20201126-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 print_deadlock_bug kernel/locking/lockdep.c:2761 [inline] check_deadlock kernel/locking/lockdep.c:2804 [inline] validate_chain kernel/locking/lockdep.c:3595 [inline] __lock_acquire.cold+0x15e/0x3b0 kernel/locking/lockdep.c:4832 lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x134/0x1110 kernel/locking/mutex.c:1103 cma_release_dev drivers/infiniband/core/cma.c:476 [inline] _destroy_id+0x299/0xa00 drivers/infiniband/core/cma.c:1852 cma_listen_on_dev.cold+0x168/0x16d drivers/infiniband/core/cma.c:2535 cma_add_one+0x661/0xcd0 drivers/infiniband/core/cma.c:4905 add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:712 enable_device_and_get+0x1d5/0x3c0 drivers/infiniband/core/device.c:1314 ib_register_device drivers/infiniband/core/device.c:1396 [inline] ib_register_device+0x7c7/0xa10 drivers/infiniband/core/device.c:1348 siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline] siw_newlink drivers/infiniband/sw/siw/siw_main.c:538 [inline] siw_newlink+0xc83/0x1230 drivers/infiniband/sw/siw/siw_main.c:515 nldev_newlink+0x30e/0x540 drivers/infiniband/core/nldev.c:1555 rdma_nl_rcv_msg+0x367/0x690 drivers/infiniband/core/netlink.c:195 rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x2f2/0x440 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2340 ___sys_sendmsg+0xf3/0x170 net/socket.c:2394 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2427 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45deb9 Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f177bcefc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002d040 RCX: 000000000045deb9 RDX: 0000000000000000 RSI: 0000000020001400 RDI: 0000000000000003 RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffc7de2273f R14: 00007f177bcf09c0 R15: 000000000118bf2c