iwpm_register_pid: Unable to send a nlmsg (client = 2) ====================================================== WARNING: possible circular locking dependency detected 6.12.0-syzkaller-10683-ge8e7be7d212d #0 Not tainted ------------------------------------------------------ syz-executor103/5851 is trying to acquire lock: ffff88807a7f3858 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1617 [inline] ffff88807a7f3858 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sock_set_reuseaddr+0x17/0x60 net/core/sock.c:781 but task is already holding lock: ffffffff8fa76008 (lock#7){+.+.}-{4:4}, 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: -> #3 (lock#7){+.+.}-{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+0x248/0x880 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 -> #2 (rtnl_mutex){+.+.}-{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 do_ipv6_setsockopt+0x9e8/0x3640 net/ipv6/ipv6_sockglue.c:566 ipv6_setsockopt+0x5d/0x170 net/ipv6/ipv6_sockglue.c:993 smc_setsockopt+0x275/0xe50 net/smc/af_smc.c:3064 do_sock_setsockopt+0x3af/0x720 net/socket.c:2313 __sys_setsockopt net/socket.c:2338 [inline] __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2341 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:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 smc_switch_to_fallback+0x35/0xdb0 net/smc/af_smc.c:902 smc_sendmsg+0x11f/0x530 net/smc/af_smc.c:2771 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:726 __sys_sendto+0x363/0x4c0 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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+0x1397/0x2100 kernel/locking/lockdep.c:5226 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 other info that might help us debug this: Chain exists of: sk_lock-AF_INET6 --> rtnl_mutex --> lock#7 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(lock#7); lock(rtnl_mutex); lock(lock#7); lock(sk_lock-AF_INET6); *** DEADLOCK *** 6 locks held by syz-executor103/5851: #0: ffffffff9a7e7f18 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:164 [inline] #0: ffffffff9a7e7f18 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] #0: ffffffff9a7e7f18 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv+0x32d/0x9e0 drivers/infiniband/core/netlink.c:259 #1: ffffffff8fa62050 (link_ops_rwsem){++++}-{4:4}, at: nldev_newlink+0x42a/0x640 drivers/infiniband/core/nldev.c:1785 #2: ffffffff8fa54bf0 (devices_rwsem){++++}-{4:4}, at: enable_device_and_get+0x12e/0x440 drivers/infiniband/core/device.c:1329 #3: ffffffff8fa54ef0 (clients_rwsem){++++}-{4:4}, at: enable_device_and_get+0x196/0x440 drivers/infiniband/core/device.c:1337 #4: ffff888024e4c5d8 (&device->client_data_rwsem){++++}-{4:4}, at: add_client_context+0x4f4/0x8b0 drivers/infiniband/core/device.c:726 #5: ffffffff8fa76008 (lock#7){+.+.}-{4:4}, at: cma_add_one+0x6bc/0xcd0 drivers/infiniband/core/cma.c:5354 stack backtrace: CPU: 0 UID: 0 PID: 5851 Comm: syz-executor103 Not tainted 6.12.0-syzkaller-10683-ge8e7be7d212d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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+0x1397/0x2100 kernel/locking/lockdep.c:5226 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 RIP: 0033:0x7fbf2551f659 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc1cb708f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fbf25566492 RCX: 00007fbf2551f659 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000005 RBP: 00007fbf25566470 R08: 0000000000000000 R09: 0000555500000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbf255663f5 R13: 0000000000000001 R14: 00007ffc1cb70940 R15: 0000000000000003 infiniband syz0: RDMA CMA: cma_listen_on_dev, error -98