UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list
iwpm_register_pid: Unable to send a nlmsg (client = 2)
infiniband Syz1: RDMA CMA: cma_listen_on_dev, error -98
======================================================
WARNING: possible circular locking dependency detected
6.13.0-rc3-syzkaller-00193-ge9b8ffafd20a #0 Not tainted
------------------------------------------------------
syz.0.0/5319 is trying to acquire lock:
ffffffff8fcb2b88 (rtnl_mutex){+.+.}-{4:4}, at: smc_vlan_by_tcpsk+0x399/0x4e0 net/smc/smc_core.c:1903

but task is already holding lock:
ffff888050e58258 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1617 [inline]
ffff888050e58258 (sk_lock-AF_INET6){+.+.}-{0:0}, at: smc_connect+0xb7/0xde0 net/smc/af_smc.c:1641

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (sk_lock-AF_INET6){+.+.}-{0:0}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       lock_sock_nested+0x48/0x100 net/core/sock.c:3622
       lock_sock include/net/sock.h:1617 [inline]
       sock_set_reuseaddr+0x17/0x60 net/core/sock.c:781
       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:728
       enable_device_and_get+0x1e6/0x440 drivers/infiniband/core/device.c:1339
       ib_register_device+0x10d4/0x13e0 drivers/infiniband/core/device.c:1450
       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:1321 [inline]
       netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347
       netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891
       sock_sendmsg_nosec net/socket.c:711 [inline]
       __sock_sendmsg+0x221/0x270 net/socket.c:726
       ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2583
       ___sys_sendmsg net/socket.c:2637 [inline]
       __sys_sendmsg+0x269/0x350 net/socket.c:2669
       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

-> #1 (lock#8){+.+.}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       __mutex_lock_common kernel/locking/mutex.c:585 [inline]
       __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735
       cma_init+0x1e/0x140 drivers/infiniband/core/cma.c:5438
       do_one_initcall+0x248/0x870 init/main.c:1266
       do_initcall_level+0x157/0x210 init/main.c:1328
       do_initcalls+0x3f/0x80 init/main.c:1344
       kernel_init_freeable+0x435/0x5d0 init/main.c:1577
       kernel_init+0x1d/0x2b0 init/main.c:1466
       ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

-> #0 (rtnl_mutex){+.+.}-{4:4}:
       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+0x1397/0x2100 kernel/locking/lockdep.c:5226
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
       __mutex_lock_common kernel/locking/mutex.c:585 [inline]
       __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735
       smc_vlan_by_tcpsk+0x399/0x4e0 net/smc/smc_core.c:1903
       __smc_connect+0x292/0x1850 net/smc/af_smc.c:1517
       smc_connect+0x868/0xde0 net/smc/af_smc.c:1693
       __sys_connect_file net/socket.c:2055 [inline]
       __sys_connect+0x288/0x2d0 net/socket.c:2074
       __do_sys_connect net/socket.c:2080 [inline]
       __se_sys_connect net/socket.c:2077 [inline]
       __x64_sys_connect+0x7a/0x90 net/socket.c:2077
       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:
  rtnl_mutex --> lock#8 --> sk_lock-AF_INET6

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(sk_lock-AF_INET6);
                               lock(lock#8);
                               lock(sk_lock-AF_INET6);
  lock(rtnl_mutex);

 *** DEADLOCK ***

1 lock held by syz.0.0/5319:
 #0: ffff888050e58258 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1617 [inline]
 #0: ffff888050e58258 (sk_lock-AF_INET6){+.+.}-{0:0}, at: smc_connect+0xb7/0xde0 net/smc/af_smc.c:1641

stack backtrace:
CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted 6.13.0-rc3-syzkaller-00193-ge9b8ffafd20a #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:
 <TASK>
 __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+0x1397/0x2100 kernel/locking/lockdep.c:5226
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
 __mutex_lock_common kernel/locking/mutex.c:585 [inline]
 __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735
 smc_vlan_by_tcpsk+0x399/0x4e0 net/smc/smc_core.c:1903
 __smc_connect+0x292/0x1850 net/smc/af_smc.c:1517
 smc_connect+0x868/0xde0 net/smc/af_smc.c:1693
 __sys_connect_file net/socket.c:2055 [inline]
 __sys_connect+0x288/0x2d0 net/socket.c:2074
 __do_sys_connect net/socket.c:2080 [inline]
 __se_sys_connect net/socket.c:2077 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:2077
 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: 0033:0x7f6243f85d29
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:00007f62439fe038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f6244175fa0 RCX: 00007f6243f85d29
RDX: 000000000000001c RSI: 0000000020000000 RDI: 000000000000000b
RBP: 00007f6244001aa8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6244175fa0 R15: 00007ffc30f03ca8
 </TASK>