iwpm_register_pid: Unable to send a nlmsg (client = 2)
======================================================
WARNING: possible circular locking dependency detected
6.14.0-syzkaller-05877-g1a9239bb4253 #0 Not tainted
------------------------------------------------------
syz.3.71/6181 is trying to acquire lock:
ffff88805a97c218 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1615 [inline]
ffff88805a97c218 (sk_lock-AF_INET){+.+.}-{0:0}, at: sock_set_reuseaddr+0x17/0x60 net/core/sock.c:788

but task is already holding lock:
ffffffff8fe6e248 (lock#7){+.+.}-{4:4}, at: cma_add_one+0x6c1/0xce0 drivers/infiniband/core/cma.c:5370

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:587 [inline]
       __mutex_lock+0x1bf/0x1000 kernel/locking/mutex.c:732
       cma_init+0x1e/0x140 drivers/infiniband/core/cma.c:5454
       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:587 [inline]
       __mutex_lock+0x1bf/0x1000 kernel/locking/mutex.c:732
       ip_mroute_setsockopt+0x161/0x11f0 net/ipv4/ipmr.c:1396
       do_ip_setsockopt+0x1114/0x39c0 net/ipv4/ip_sockglue.c:948
       ip_setsockopt+0x63/0x100 net/ipv4/ip_sockglue.c:1417
       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:587 [inline]
       __mutex_lock+0x1bf/0x1000 kernel/locking/mutex.c:732
       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:3697
       lock_sock include/net/sock.h:1615 [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:585
       cma_iw_listen drivers/infiniband/core/cma.c:2684 [inline]
       rdma_listen+0xb51/0xe40 drivers/infiniband/core/cma.c:3969
       cma_listen_on_dev+0x3e0/0x6f0 drivers/infiniband/core/cma.c:2743
       cma_add_one+0x7dc/0xce0 drivers/infiniband/core/cma.c:5373
       add_client_context+0x53e/0x8b0 drivers/infiniband/core/device.c:711
       enable_device_and_get+0x1de/0x450 drivers/infiniband/core/device.c:1322
       ib_register_device+0x1138/0x1460 drivers/infiniband/core/device.c:1433
       siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline]
       siw_newlink+0x938/0xda0 drivers/infiniband/sw/siw/siw_main.c:431
       nldev_newlink+0x5ee/0x680 drivers/infiniband/core/nldev.c:1795
       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.3.71/6181:
 #0: ffffffff9aaa62b8 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:164 [inline]
 #0: ffffffff9aaa62b8 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
 #0: ffffffff9aaa62b8 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv+0x32f/0x9e0 drivers/infiniband/core/netlink.c:259
 #1: ffffffff8fe5a410 (link_ops_rwsem){++++}-{4:4}, at: nldev_newlink+0x458/0x680 drivers/infiniband/core/nldev.c:1785
 #2: ffffffff8fe4d0b0 (devices_rwsem){++++}-{4:4}, at: enable_device_and_get+0x130/0x450 drivers/infiniband/core/device.c:1312
 #3: ffffffff8fe4d3b0 (clients_rwsem){++++}-{4:4}, at: enable_device_and_get+0x18e/0x450 drivers/infiniband/core/device.c:1320
 #4: ffff8880313685e0 (&device->client_data_rwsem){++++}-{4:4}, at: add_client_context+0x4fa/0x8b0 drivers/infiniband/core/device.c:709
 #5: ffffffff8fe6e248 (lock#7){+.+.}-{4:4}, at: cma_add_one+0x6c1/0xce0 drivers/infiniband/core/cma.c:5370

stack backtrace:
CPU: 1 UID: 0 PID: 6181 Comm: syz.3.71 Not tainted 6.14.0-syzkaller-05877-g1a9239bb4253 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __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:3697
 lock_sock include/net/sock.h:1615 [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:585
 cma_iw_listen drivers/infiniband/core/cma.c:2684 [inline]
 rdma_listen+0xb51/0xe40 drivers/infiniband/core/cma.c:3969
 cma_listen_on_dev+0x3e0/0x6f0 drivers/infiniband/core/cma.c:2743
 cma_add_one+0x7dc/0xce0 drivers/infiniband/core/cma.c:5373
 add_client_context+0x53e/0x8b0 drivers/infiniband/core/device.c:711
 enable_device_and_get+0x1de/0x450 drivers/infiniband/core/device.c:1322
 ib_register_device+0x1138/0x1460 drivers/infiniband/core/device.c:1433
 siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline]
 siw_newlink+0x938/0xda0 drivers/infiniband/sw/siw/siw_main.c:431
 nldev_newlink+0x5ee/0x680 drivers/infiniband/core/nldev.c:1795
 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: 0033:0x7fb99a78d169
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:00007fb99b5db038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb99a9a5fa0 RCX: 00007fb99a78d169
RDX: 0000000020000000 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007fb99a80e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb99a9a5fa0 R15: 00007ffe396e9408
 </TASK>
infiniband s9z1: RDMA CMA: cma_listen_on_dev, error -98
netlink: 12 bytes leftover after parsing attributes in process `syz.3.71'.