iwpm_register_pid: Unable to send a nlmsg (client = 2) ====================================================== WARNING: possible circular locking dependency detected 6.14.0-rc1-syzkaller-00187-g7bca2b2d5fcc #0 Not tainted ------------------------------------------------------ syz.2.391/7155 is trying to acquire lock: ffff88801b789bd8 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1624 [inline] ffff88801b789bd8 (sk_lock-AF_INET){+.+.}-{0:0}, at: sock_set_reuseaddr+0x17/0x60 net/core/sock.c:788 but task is already holding lock: ffffffff8fa5a368 (lock#7){+.+.}-{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#7){+.+.}-{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+0x248/0x870 init/main.c:1257 do_initcall_level+0x157/0x210 init/main.c:1319 do_initcalls+0x3f/0x80 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 ip_mroute_setsockopt+0x15b/0x1190 net/ipv4/ipmr.c:1396 do_ip_setsockopt+0x129f/0x3cd0 net/ipv4/ip_sockglue.c:948 ip_setsockopt+0x63/0x100 net/ipv4/ip_sockglue.c:1417 smc_setsockopt+0x275/0xe50 net/smc/af_smc.c:3081 do_sock_setsockopt+0x3af/0x720 net/socket.c:2298 __sys_setsockopt net/socket.c:2323 [inline] __do_sys_setsockopt net/socket.c:2329 [inline] __se_sys_setsockopt net/socket.c:2326 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2326 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:713 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:728 __sys_sendto+0x363/0x4c0 net/socket.c:2182 __do_sys_sendto net/socket.c:2189 [inline] __se_sys_sendto net/socket.c:2185 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2185 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:3645 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+0x941/0xd60 drivers/infiniband/core/cma.c:3969 cma_listen_on_dev+0x3e3/0x6f0 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+0x10d4/0x13e0 drivers/infiniband/core/device.c:1433 siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline] siw_newlink+0x905/0xd60 drivers/infiniband/sw/siw/siw_main.c:431 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:1322 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:713 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:728 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2568 ___sys_sendmsg net/socket.c:2622 [inline] __sys_sendmsg+0x269/0x350 net/socket.c:2654 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#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.2.391/7155: #0: ffffffff9a7bea38 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:164 [inline] #0: ffffffff9a7bea38 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] #0: ffffffff9a7bea38 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv+0x32d/0x9e0 drivers/infiniband/core/netlink.c:259 #1: ffffffff8fa46530 (link_ops_rwsem){++++}-{4:4}, at: nldev_newlink+0x42a/0x640 drivers/infiniband/core/nldev.c:1785 #2: ffffffff8fa39290 (devices_rwsem){++++}-{4:4}, at: enable_device_and_get+0x12e/0x440 drivers/infiniband/core/device.c:1312 #3: ffffffff8fa39590 (clients_rwsem){++++}-{4:4}, at: enable_device_and_get+0x196/0x440 drivers/infiniband/core/device.c:1320 #4: ffff888021f045e0 (&device->client_data_rwsem){++++}-{4:4}, at: add_client_context+0x4f4/0x8b0 drivers/infiniband/core/device.c:709 #5: ffffffff8fa5a368 (lock#7){+.+.}-{4:4}, at: cma_add_one+0x6bc/0xcd0 drivers/infiniband/core/cma.c:5370 stack backtrace: CPU: 1 UID: 0 PID: 7155 Comm: syz.2.391 Not tainted 6.14.0-rc1-syzkaller-00187-g7bca2b2d5fcc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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: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:3645 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+0x941/0xd60 drivers/infiniband/core/cma.c:3969 cma_listen_on_dev+0x3e3/0x6f0 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+0x10d4/0x13e0 drivers/infiniband/core/device.c:1433 siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline] siw_newlink+0x905/0xd60 drivers/infiniband/sw/siw/siw_main.c:431 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:1322 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:713 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:728 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2568 ___sys_sendmsg net/socket.c:2622 [inline] __sys_sendmsg+0x269/0x350 net/socket.c:2654 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: 0033:0x7f6fa778cde9 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:00007f6fa55f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f6fa79a5fa0 RCX: 00007f6fa778cde9 RDX: 0000000000008000 RSI: 0000200000000340 RDI: 0000000000000003 RBP: 00007f6fa780e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6fa79a5fa0 R15: 00007ffec15cf968 infiniband syz1: RDMA CMA: cma_listen_on_dev, error -98