lo speed is unknown, defaulting to 1000 lo speed is unknown, defaulting to 1000 lo speed is unknown, defaulting to 1000 iwpm_register_pid: Unable to send a nlmsg (client = 2) ====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc1-syzkaller-00301-g3bde70a2c827 #0 Not tainted ------------------------------------------------------ syz.0.705/8027 is trying to acquire lock: ffff88805fcbb558 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1651 [inline] ffff88805fcbb558 (sk_lock-AF_INET){+.+.}-{0:0}, at: sock_set_reuseaddr+0x17/0x60 net/core/sock.c:788 but task is already holding lock: ffffffff8fd91ee8 (lock#7){+.+.}-{4:4}, at: cma_add_one+0x67a/0xdd0 drivers/infiniband/core/cma.c:5384 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (lock#7){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x199/0xb90 kernel/locking/mutex.c:746 cma_init+0x1d/0x150 drivers/infiniband/core/cma.c:5468 do_one_initcall+0x120/0x6e0 init/main.c:1257 do_initcall_level init/main.c:1319 [inline] do_initcalls init/main.c:1335 [inline] do_basic_setup init/main.c:1354 [inline] kernel_init_freeable+0x5c2/0x900 init/main.c:1567 kernel_init+0x1c/0x2b0 init/main.c:1457 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #2 (rtnl_mutex){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x199/0xb90 kernel/locking/mutex.c:746 do_ip_setsockopt+0xf6/0x3240 net/ipv4/ip_sockglue.c:1077 ip_setsockopt+0x59/0xf0 net/ipv4/ip_sockglue.c:1417 tcp_setsockopt+0xa4/0x100 net/ipv4/tcp.c:4077 smc_setsockopt+0x1b3/0xa00 net/smc/af_smc.c:3081 do_sock_setsockopt+0x221/0x470 net/socket.c:2296 __sys_setsockopt+0x1a0/0x230 net/socket.c:2321 __do_sys_setsockopt net/socket.c:2327 [inline] __se_sys_setsockopt net/socket.c:2324 [inline] __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2324 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&smc->clcsock_release_lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x199/0xb90 kernel/locking/mutex.c:746 smc_switch_to_fallback+0x2d/0x9f0 net/smc/af_smc.c:903 smc_sendmsg+0x13d/0x520 net/smc/af_smc.c:2781 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg net/socket.c:727 [inline] __sys_sendto+0x495/0x510 net/socket.c:2180 __do_sys_sendto net/socket.c:2187 [inline] __se_sys_sendto net/socket.c:2183 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (sk_lock-AF_INET){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 lock_sock_nested+0x41/0xf0 net/core/sock.c:3702 lock_sock include/net/sock.h:1651 [inline] sock_set_reuseaddr+0x17/0x60 net/core/sock.c:788 siw_create_listen+0x9ea/0x1320 drivers/infiniband/sw/siw/siw_cm.c:1777 iw_cm_listen+0x16f/0x1f0 drivers/infiniband/core/iwcm.c:587 cma_iw_listen drivers/infiniband/core/cma.c:2698 [inline] rdma_listen+0x7ef/0xe30 drivers/infiniband/core/cma.c:3983 cma_listen_on_dev+0x4dc/0x810 drivers/infiniband/core/cma.c:2757 cma_add_one+0x790/0xdd0 drivers/infiniband/core/cma.c:5387 add_client_context+0x3db/0x590 drivers/infiniband/core/device.c:720 enable_device_and_get+0x1d4/0x3f0 drivers/infiniband/core/device.c:1331 ib_register_device drivers/infiniband/core/device.c:1447 [inline] ib_register_device+0x87f/0xe00 drivers/infiniband/core/device.c:1393 siw_device_register drivers/infiniband/sw/siw/siw_main.c:71 [inline] siw_newlink drivers/infiniband/sw/siw/siw_main.c:430 [inline] siw_newlink+0xb60/0xd70 drivers/infiniband/sw/siw/siw_main.c:412 nldev_newlink+0x3a3/0x680 drivers/infiniband/core/nldev.c:1796 rdma_nl_rcv_msg+0x387/0x6e0 drivers/infiniband/core/netlink.c:195 rdma_nl_rcv_skb.constprop.0.isra.0+0x2e5/0x450 drivers/infiniband/core/netlink.c:239 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg net/socket.c:727 [inline] ____sys_sendmsg+0xa95/0xc70 net/socket.c:2566 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620 __sys_sendmsg+0x16d/0x220 net/socket.c:2652 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: sk_lock-AF_INET --> rtnl_mutex --> lock#7 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(lock#7); lock(rtnl_mutex); lock(lock#7); lock(sk_lock-AF_INET); *** DEADLOCK *** 6 locks held by syz.0.705/8027: #0: ffffffff9aeb1dd8 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_msg+0x169/0x6e0 drivers/infiniband/core/netlink.c:164 #1: ffffffff8fd797f0 (link_ops_rwsem){++++}-{4:4}, at: nldev_newlink+0x2e6/0x680 drivers/infiniband/core/nldev.c:1786 #2: ffffffff8fd657b0 (devices_rwsem){++++}-{4:4}, at: enable_device_and_get+0x103/0x3f0 drivers/infiniband/core/device.c:1321 #3: ffffffff8fd65670 (clients_rwsem){++++}-{4:4}, at: enable_device_and_get+0x162/0x3f0 drivers/infiniband/core/device.c:1329 #4: ffff88802b9785f0 (&device->client_data_rwsem){++++}-{4:4}, at: add_client_context+0x3a7/0x590 drivers/infiniband/core/device.c:718 #5: ffffffff8fd91ee8 (lock#7){+.+.}-{4:4}, at: cma_add_one+0x67a/0xdd0 drivers/infiniband/core/cma.c:5384 stack backtrace: CPU: 1 UID: 0 PID: 8027 Comm: syz.0.705 Not tainted 6.15.0-rc1-syzkaller-00301-g3bde70a2c827 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2079 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 lock_sock_nested+0x41/0xf0 net/core/sock.c:3702 lock_sock include/net/sock.h:1651 [inline] sock_set_reuseaddr+0x17/0x60 net/core/sock.c:788 siw_create_listen+0x9ea/0x1320 drivers/infiniband/sw/siw/siw_cm.c:1777 iw_cm_listen+0x16f/0x1f0 drivers/infiniband/core/iwcm.c:587 cma_iw_listen drivers/infiniband/core/cma.c:2698 [inline] rdma_listen+0x7ef/0xe30 drivers/infiniband/core/cma.c:3983 cma_listen_on_dev+0x4dc/0x810 drivers/infiniband/core/cma.c:2757 cma_add_one+0x790/0xdd0 drivers/infiniband/core/cma.c:5387 add_client_context+0x3db/0x590 drivers/infiniband/core/device.c:720 enable_device_and_get+0x1d4/0x3f0 drivers/infiniband/core/device.c:1331 ib_register_device drivers/infiniband/core/device.c:1447 [inline] ib_register_device+0x87f/0xe00 drivers/infiniband/core/device.c:1393 siw_device_register drivers/infiniband/sw/siw/siw_main.c:71 [inline] siw_newlink drivers/infiniband/sw/siw/siw_main.c:430 [inline] siw_newlink+0xb60/0xd70 drivers/infiniband/sw/siw/siw_main.c:412 nldev_newlink+0x3a3/0x680 drivers/infiniband/core/nldev.c:1796 rdma_nl_rcv_msg+0x387/0x6e0 drivers/infiniband/core/netlink.c:195 rdma_nl_rcv_skb.constprop.0.isra.0+0x2e5/0x450 drivers/infiniband/core/netlink.c:239 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg net/socket.c:727 [inline] ____sys_sendmsg+0xa95/0xc70 net/socket.c:2566 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620 __sys_sendmsg+0x16d/0x220 net/socket.c:2652 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbf7458d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbf7538f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fbf747a6160 RCX: 00007fbf7458d169 RDX: 0000000000000000 RSI: 0000200000000300 RDI: 0000000000000006 RBP: 00007fbf7460e990 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbf747a6160 R15: 00007ffedbe0d878 infiniband syz0: RDMA CMA: cma_listen_on_dev, error -98 lo speed is unknown, defaulting to 1000 lo speed is unknown, defaulting to 1000 lo speed is unknown, defaulting to 1000 lo speed is unknown, defaulting to 1000 lo speed is unknown, defaulting to 1000