iwpm_register_pid: Unable to send a nlmsg (client = 2) ====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc4-syzkaller-00261-g850925a8133c #0 Not tainted ------------------------------------------------------ syz.0.0/5327 is trying to acquire lock: ffff88803f6cd358 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1611 [inline] ffff88803f6cd358 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sock_set_reuseaddr+0x17/0x60 net/core/sock.c:783 but task is already holding lock: ffffffff8fa63408 (lock#8){+.+.}-{3:3}, at: cma_add_one+0x6bc/0xcd0 drivers/infiniband/core/cma.c:5354 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (lock#8){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 cma_init+0x1e/0x140 drivers/infiniband/core/cma.c:5438 do_one_initcall+0x248/0x880 init/main.c:1269 do_initcall_level+0x157/0x210 init/main.c:1331 do_initcalls+0x3f/0x80 init/main.c:1347 kernel_init_freeable+0x435/0x5d0 init/main.c:1580 kernel_init+0x1d/0x2b0 init/main.c:1469 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #1 (rtnl_mutex){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 smc_vlan_by_tcpsk+0x399/0x4e0 net/smc/smc_core.c:1898 __smc_connect+0x292/0x1850 net/smc/af_smc.c:1518 smc_connect+0x868/0xde0 net/smc/af_smc.c:1694 __sys_connect_file net/socket.c:2071 [inline] __sys_connect+0x2d1/0x300 net/socket.c:2088 __do_sys_connect net/socket.c:2098 [inline] __se_sys_connect net/socket.c:2095 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2095 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (sk_lock-AF_INET6){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 lock_sock_nested+0x48/0x100 net/core/sock.c:3611 lock_sock include/net/sock.h:1611 [inline] sock_set_reuseaddr+0x17/0x60 net/core/sock.c:783 siw_create_listen+0x196/0xfe0 drivers/infiniband/sw/siw/siw_cm.c:1776 iw_cm_listen+0x15e/0x230 drivers/infiniband/core/iwcm.c:585 cma_iw_listen drivers/infiniband/core/cma.c:2668 [inline] rdma_listen+0x941/0xd60 drivers/infiniband/core/cma.c:3953 cma_listen_on_dev+0x3e3/0x6f0 drivers/infiniband/core/cma.c:2727 cma_add_one+0x7d7/0xcd0 drivers/infiniband/core/cma.c:5357 add_client_context+0x536/0x8b0 drivers/infiniband/core/device.c:727 enable_device_and_get+0x1e6/0x440 drivers/infiniband/core/device.c:1338 ib_register_device+0x10d4/0x13e0 drivers/infiniband/core/device.c:1449 siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline] siw_newlink+0x9d9/0xe50 drivers/infiniband/sw/siw/siw_main.c:452 nldev_newlink+0x5c0/0x640 drivers/infiniband/core/nldev.c:1795 rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x6dd/0x9e0 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607 ___sys_sendmsg net/socket.c:2661 [inline] __sys_sendmsg+0x292/0x380 net/socket.c:2690 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: sk_lock-AF_INET6 --> rtnl_mutex --> lock#8 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(lock#8); lock(rtnl_mutex); lock(lock#8); lock(sk_lock-AF_INET6); *** DEADLOCK *** 6 locks held by syz.0.0/5327: #0: ffffffff9a7913d8 (&rdma_nl_types[idx].sem){.+.+}-{3:3}, at: rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:164 [inline] #0: ffffffff9a7913d8 (&rdma_nl_types[idx].sem){.+.+}-{3:3}, at: rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] #0: ffffffff9a7913d8 (&rdma_nl_types[idx].sem){.+.+}-{3:3}, at: rdma_nl_rcv+0x32d/0x9e0 drivers/infiniband/core/netlink.c:259 #1: ffffffff8fa4f670 (link_ops_rwsem){++++}-{3:3}, at: nldev_newlink+0x42a/0x640 drivers/infiniband/core/nldev.c:1785 #2: ffffffff8fa42290 (devices_rwsem){++++}-{3:3}, at: enable_device_and_get+0x12e/0x440 drivers/infiniband/core/device.c:1328 #3: ffffffff8fa42590 (clients_rwsem){++++}-{3:3}, at: enable_device_and_get+0x196/0x440 drivers/infiniband/core/device.c:1336 #4: ffff8880407585d0 (&device->client_data_rwsem){++++}-{3:3}, at: add_client_context+0x4f4/0x8b0 drivers/infiniband/core/device.c:725 #5: ffffffff8fa63408 (lock#8){+.+.}-{3:3}, at: cma_add_one+0x6bc/0xcd0 drivers/infiniband/core/cma.c:5354 stack backtrace: CPU: 0 UID: 0 PID: 5327 Comm: syz.0.0 Not tainted 6.12.0-rc4-syzkaller-00261-g850925a8133c #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 lock_sock_nested+0x48/0x100 net/core/sock.c:3611 lock_sock include/net/sock.h:1611 [inline] sock_set_reuseaddr+0x17/0x60 net/core/sock.c:783 siw_create_listen+0x196/0xfe0 drivers/infiniband/sw/siw/siw_cm.c:1776 iw_cm_listen+0x15e/0x230 drivers/infiniband/core/iwcm.c:585 cma_iw_listen drivers/infiniband/core/cma.c:2668 [inline] rdma_listen+0x941/0xd60 drivers/infiniband/core/cma.c:3953 cma_listen_on_dev+0x3e3/0x6f0 drivers/infiniband/core/cma.c:2727 cma_add_one+0x7d7/0xcd0 drivers/infiniband/core/cma.c:5357 add_client_context+0x536/0x8b0 drivers/infiniband/core/device.c:727 enable_device_and_get+0x1e6/0x440 drivers/infiniband/core/device.c:1338 ib_register_device+0x10d4/0x13e0 drivers/infiniband/core/device.c:1449 siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline] siw_newlink+0x9d9/0xe50 drivers/infiniband/sw/siw/siw_main.c:452 nldev_newlink+0x5c0/0x640 drivers/infiniband/core/nldev.c:1795 rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x6dd/0x9e0 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607 ___sys_sendmsg net/socket.c:2661 [inline] __sys_sendmsg+0x292/0x380 net/socket.c:2690 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f895b17e719 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:00007f895afff038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f895b335f80 RCX: 00007f895b17e719 RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000004 RBP: 00007f895b1f132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f895b335f80 R15: 00007ffe2b99aeb8 infiniband syz1: RDMA CMA: cma_listen_on_dev, error -98