iwpm_register_pid: Unable to send a nlmsg (client = 2) ====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc1-syzkaller-00207-g0c49baf099ba #0 Not tainted ------------------------------------------------------ syz.2.778/7689 is trying to acquire lock: ffff88805a078f18 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1651 [inline] ffff88805a078f18 (sk_lock-AF_INET){+.+.}-{0:0}, at: sock_set_reuseaddr+0x17/0x60 net/core/sock.c:788 but task is already holding lock: ffffffff8fe85968 (lock#7){+.+.}-{4:4}, at: cma_add_one+0x6c1/0xce0 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}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x1a5/0x10c0 kernel/locking/mutex.c:746 cma_init+0x1e/0x140 drivers/infiniband/core/cma.c:5468 do_one_initcall+0x24a/0x940 init/main.c:1257 do_initcall_level+0x157/0x210 init/main.c:1319 do_initcalls+0x71/0xd0 init/main.c:1335 kernel_init_freeable+0x432/0x5d0 init/main.c:1567 kernel_init+0x1d/0x2b0 init/main.c:1457 ret_from_fork+0x4b/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}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x1a5/0x10c0 kernel/locking/mutex.c:746 start_sync_thread+0xde/0x2d60 net/netfilter/ipvs/ip_vs_sync.c:1761 do_ip_vs_set_ctl+0x48e/0xe50 net/netfilter/ipvs/ip_vs_ctl.c:2732 nf_setsockopt+0x295/0x2c0 net/netfilter/nf_sockopt.c:101 smc_setsockopt+0x25c/0xd50 net/smc/af_smc.c:3081 do_sock_setsockopt+0x3b1/0x710 net/socket.c:2296 __sys_setsockopt net/socket.c:2321 [inline] __do_sys_setsockopt net/socket.c:2327 [inline] __se_sys_setsockopt net/socket.c:2324 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2324 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&smc->clcsock_release_lock){+.+.}-{4:4}: lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 __mutex_lock_common kernel/locking/mutex.c:601 [inline] __mutex_lock+0x1a5/0x10c0 kernel/locking/mutex.c:746 smc_switch_to_fallback+0x35/0xda0 net/smc/af_smc.c:903 smc_sendmsg+0x11f/0x530 net/smc/af_smc.c:2781 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:727 __sys_sendto+0x365/0x4c0 net/socket.c:2180 __do_sys_sendto net/socket.c:2187 [inline] __se_sys_sendto net/socket.c:2183 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2183 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 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+0xa69/0x24e0 kernel/locking/lockdep.c:3909 __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 lock_sock_nested+0x48/0x100 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+0x19f/0x1250 drivers/infiniband/sw/siw/siw_cm.c:1777 iw_cm_listen+0x15e/0x230 drivers/infiniband/core/iwcm.c:587 cma_iw_listen drivers/infiniband/core/cma.c:2698 [inline] rdma_listen+0xb51/0xe40 drivers/infiniband/core/cma.c:3983 cma_listen_on_dev+0x3e0/0x6f0 drivers/infiniband/core/cma.c:2757 cma_add_one+0x7dc/0xce0 drivers/infiniband/core/cma.c:5387 add_client_context+0x53e/0x8b0 drivers/infiniband/core/device.c:720 enable_device_and_get+0x1de/0x450 drivers/infiniband/core/device.c:1331 ib_register_device+0x1138/0x1460 drivers/infiniband/core/device.c:1447 siw_device_register drivers/infiniband/sw/siw/siw_main.c:71 [inline] siw_newlink+0x938/0xda0 drivers/infiniband/sw/siw/siw_main.c:430 nldev_newlink+0x5ed/0x680 drivers/infiniband/core/nldev.c:1796 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x6e5/0x9e0 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x7f8/0x9a0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8c3/0xcd0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:727 ____sys_sendmsg+0x523/0x860 net/socket.c:2566 ___sys_sendmsg net/socket.c:2620 [inline] __sys_sendmsg+0x271/0x360 net/socket.c:2652 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 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.2.778/7689: #0: ffffffff9aafd058 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:164 [inline] #0: ffffffff9aafd058 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] #0: ffffffff9aafd058 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv+0x32f/0x9e0 drivers/infiniband/core/netlink.c:259 #1: ffffffff8fe71b30 (link_ops_rwsem){++++}-{4:4}, at: nldev_newlink+0x456/0x680 drivers/infiniband/core/nldev.c:1786 #2: ffffffff8fe645d0 (devices_rwsem){++++}-{4:4}, at: enable_device_and_get+0x130/0x450 drivers/infiniband/core/device.c:1321 #3: ffffffff8fe648d0 (clients_rwsem){++++}-{4:4}, at: enable_device_and_get+0x18e/0x450 drivers/infiniband/core/device.c:1329 #4: ffff88807a8745f0 (&device->client_data_rwsem){++++}-{4:4}, at: add_client_context+0x4fa/0x8b0 drivers/infiniband/core/device.c:718 #5: ffffffff8fe85968 (lock#7){+.+.}-{4:4}, at: cma_add_one+0x6c1/0xce0 drivers/infiniband/core/cma.c:5384 stack backtrace: CPU: 0 UID: 0 PID: 7689 Comm: syz.2.778 Not tainted 6.15.0-rc1-syzkaller-00207-g0c49baf099ba #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+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2079 check_noncircular+0x142/0x160 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+0xa69/0x24e0 kernel/locking/lockdep.c:3909 __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866 lock_sock_nested+0x48/0x100 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+0x19f/0x1250 drivers/infiniband/sw/siw/siw_cm.c:1777 iw_cm_listen+0x15e/0x230 drivers/infiniband/core/iwcm.c:587 cma_iw_listen drivers/infiniband/core/cma.c:2698 [inline] rdma_listen+0xb51/0xe40 drivers/infiniband/core/cma.c:3983 cma_listen_on_dev+0x3e0/0x6f0 drivers/infiniband/core/cma.c:2757 cma_add_one+0x7dc/0xce0 drivers/infiniband/core/cma.c:5387 add_client_context+0x53e/0x8b0 drivers/infiniband/core/device.c:720 enable_device_and_get+0x1de/0x450 drivers/infiniband/core/device.c:1331 ib_register_device+0x1138/0x1460 drivers/infiniband/core/device.c:1447 siw_device_register drivers/infiniband/sw/siw/siw_main.c:71 [inline] siw_newlink+0x938/0xda0 drivers/infiniband/sw/siw/siw_main.c:430 nldev_newlink+0x5ed/0x680 drivers/infiniband/core/nldev.c:1796 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x6e5/0x9e0 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x7f8/0x9a0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8c3/0xcd0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:727 ____sys_sendmsg+0x523/0x860 net/socket.c:2566 ___sys_sendmsg net/socket.c:2620 [inline] __sys_sendmsg+0x271/0x360 net/socket.c:2652 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1e38f8d169 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:00007f1e39de0038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f1e391a5fa0 RCX: 00007f1e38f8d169 RDX: 0000000020000000 RSI: 00002000000000c0 RDI: 0000000000000007 RBP: 00007f1e3900e990 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f1e391a5fa0 R15: 00007ffe21e39958 infiniband s9z1: RDMA CMA: cma_listen_on_dev, error -98