syzbot

iwpm_register_pid: Unable to send a nlmsg (client = 2)
======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc6-syzkaller-00212-geb88e6bfbc0a #0 Not tainted
------------------------------------------------------
syz-executor870/5312 is trying to acquire lock:
ffff888043e45b98 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1624 [inline]
ffff888043e45b98 (sk_lock-AF_INET){+.+.}-{0:0}, at: sock_set_reuseaddr+0x17/0x60 net/core/sock.c:788

but task is already holding lock:
ffffffff8fc6da68 (lock#8){+.+.}-{4:4}, at: cma_add_one+0x6bc/0xcd0 drivers/infiniband/core/cma.c:5370

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (lock#8){+.+.}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       __mutex_lock_common kernel/locking/mutex.c:585 [inline]
       __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
       cma_init+0x1e/0x140 drivers/infiniband/core/cma.c:5454
       do_one_initcall+0x248/0x930 init/main.c:1257
       do_initcall_level+0x157/0x210 init/main.c:1319
       do_initcalls+0x71/0xd0 init/main.c:1335
       kernel_init_freeable+0x435/0x5d0 init/main.c:1568
       kernel_init+0x1d/0x2b0 init/main.c:1457
       ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

-> #2 (rtnl_mutex){+.+.}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       __mutex_lock_common kernel/locking/mutex.c:585 [inline]
       __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
       do_ip_setsockopt+0x11ef/0x3ae0 net/ipv4/ip_sockglue.c:1077
       ip_setsockopt+0x63/0x100 net/ipv4/ip_sockglue.c:1417
       smc_setsockopt+0x275/0xd10 net/smc/af_smc.c:3081
       do_sock_setsockopt+0x3af/0x720 net/socket.c:2303
       __sys_setsockopt net/socket.c:2328 [inline]
       __do_sys_setsockopt net/socket.c:2334 [inline]
       __se_sys_setsockopt net/socket.c:2331 [inline]
       __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2331
       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 (&smc->clcsock_release_lock){+.+.}-{4:4}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       __mutex_lock_common kernel/locking/mutex.c:585 [inline]
       __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
       smc_switch_to_fallback+0x35/0xd90 net/smc/af_smc.c:903
       smc_sendmsg+0x11f/0x530 net/smc/af_smc.c:2781
       sock_sendmsg_nosec net/socket.c:718 [inline]
       __sock_sendmsg+0x221/0x270 net/socket.c:733
       __sys_sendto+0x363/0x4c0 net/socket.c:2187
       __do_sys_sendto net/socket.c:2194 [inline]
       __se_sys_sendto net/socket.c:2190 [inline]
       __x64_sys_sendto+0xde/0x100 net/socket.c:2190
       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_INET){+.+.}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3163 [inline]
       check_prevs_add kernel/locking/lockdep.c:3282 [inline]
       validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
       __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
       lock_sock_nested+0x48/0x100 net/core/sock.c:3662
       lock_sock include/net/sock.h:1624 [inline]
       sock_set_reuseaddr+0x17/0x60 net/core/sock.c:788
       siw_create_listen+0x19d/0x11d0 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+0xac8/0xdd0 drivers/infiniband/core/cma.c:3969
       cma_listen_on_dev+0x3e0/0x6f0 drivers/infiniband/core/cma.c:2743
       cma_add_one+0x7d7/0xcd0 drivers/infiniband/core/cma.c:5373
       add_client_context+0x536/0x8b0 drivers/infiniband/core/device.c:711
       enable_device_and_get+0x1e6/0x440 drivers/infiniband/core/device.c:1322
       ib_register_device+0x1120/0x1460 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+0x5ea/0x680 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:1312 [inline]
       netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1338
       netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1882
       sock_sendmsg_nosec net/socket.c:718 [inline]
       __sock_sendmsg+0x221/0x270 net/socket.c:733
       ____sys_sendmsg+0x53a/0x860 net/socket.c:2573
       ___sys_sendmsg net/socket.c:2627 [inline]
       __sys_sendmsg+0x269/0x350 net/socket.c:2659
       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_INET --> rtnl_mutex --> lock#8

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

6 locks held by syz-executor870/5312:
 #0: ffffffff9aa11b98 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:164 [inline]
 #0: ffffffff9aa11b98 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
 #0: ffffffff9aa11b98 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv+0x32d/0x9e0 drivers/infiniband/core/netlink.c:259
 #1: ffffffff8fc59c30 (link_ops_rwsem){++++}-{4:4}, at: nldev_newlink+0x454/0x680 drivers/infiniband/core/nldev.c:1785
 #2: ffffffff8fc4c8d0 (devices_rwsem){++++}-{4:4}, at: enable_device_and_get+0x12e/0x440 drivers/infiniband/core/device.c:1312
 #3: ffffffff8fc4cbd0 (clients_rwsem){++++}-{4:4}, at: enable_device_and_get+0x196/0x440 drivers/infiniband/core/device.c:1320
 #4: ffff888048e2c5e0 (&device->client_data_rwsem){++++}-{4:4}, at: add_client_context+0x4f4/0x8b0 drivers/infiniband/core/device.c:709
 #5: ffffffff8fc6da68 (lock#8){+.+.}-{4:4}, at: cma_add_one+0x6bc/0xcd0 drivers/infiniband/core/cma.c:5370

stack backtrace:
CPU: 0 UID: 0 PID: 5312 Comm: syz-executor870 Not tainted 6.14.0-rc6-syzkaller-00212-geb88e6bfbc0a #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:2076
 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2208
 check_prev_add kernel/locking/lockdep.c:3163 [inline]
 check_prevs_add kernel/locking/lockdep.c:3282 [inline]
 validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 lock_sock_nested+0x48/0x100 net/core/sock.c:3662
 lock_sock include/net/sock.h:1624 [inline]
 sock_set_reuseaddr+0x17/0x60 net/core/sock.c:788
 siw_create_listen+0x19d/0x11d0 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+0xac8/0xdd0 drivers/infiniband/core/cma.c:3969
 cma_listen_on_dev+0x3e0/0x6f0 drivers/infiniband/core/cma.c:2743
 cma_add_one+0x7d7/0xcd0 drivers/infiniband/core/cma.c:5373
 add_client_context+0x536/0x8b0 drivers/infiniband/core/device.c:711
 enable_device_and_get+0x1e6/0x440 drivers/infiniband/core/device.c:1322
 ib_register_device+0x1120/0x1460 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+0x5ea/0x680 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:1312 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1338
 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1882
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:733
 ____sys_sendmsg+0x53a/0x860 net/socket.c:2573
 ___sys_sendmsg net/socket.c:2627 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2659
 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: 0033:0x7f0d470a2ee9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1a 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd6d99e648 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f0d470a2ee9
RDX: 00000000200040c0 RSI: 00004000000004c0 RDI: 0000000000000005
RBP: 00000000000f4240 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffd6d99e6a0
R13: 00007f0d470f03fe R14: 0000000000000003 R15: 00007ffd6d99e680
 </TASK>
infiniband syz2: RDMA CMA: cma_listen_on_dev, error -98