====================================================== WARNING: possible circular locking dependency detected 6.14.0-rc7-syzkaller-ga2392f333575 #0 Not tainted ------------------------------------------------------ syz.1.265/7546 is trying to acquire lock: ffff800092e17068 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 but task is already holding lock: ffff0000cda50258 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1624 [inline] ffff0000cda50258 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_connect+0xc4/0xb30 net/smc/af_smc.c:1644 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sk_lock-AF_INET){+.+.}-{0:0}: lock_sock_nested net/core/sock.c:3662 [inline] lock_sock include/net/sock.h:1624 [inline] sock_set_reuseaddr+0x58/0x154 net/core/sock.c:788 siw_create_listen+0x164/0xe50 drivers/infiniband/sw/siw/siw_cm.c:1777 iw_cm_listen+0x14c/0x204 drivers/infiniband/core/iwcm.c:585 cma_iw_listen drivers/infiniband/core/cma.c:2684 [inline] rdma_listen+0x8d0/0xb64 drivers/infiniband/core/cma.c:3969 cma_listen_on_dev+0x31c/0x648 drivers/infiniband/core/cma.c:2743 cma_add_one+0x5ec/0xab4 drivers/infiniband/core/cma.c:5373 add_client_context+0x45c/0x7d0 drivers/infiniband/core/device.c:711 enable_device_and_get+0x1a8/0x3e8 drivers/infiniband/core/device.c:1322 ib_register_device+0xe84/0x110c drivers/infiniband/core/device.c:1433 siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline] siw_newlink+0x77c/0xb84 drivers/infiniband/sw/siw/siw_main.c:431 nldev_newlink+0x47c/0x54c 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+0x5c4/0x858 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x7b4/0xa9c net/netlink/af_netlink.c:1882 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:733 [inline] ____sys_sendmsg+0x570/0x87c net/socket.c:2573 ___sys_sendmsg net/socket.c:2627 [inline] __sys_sendmsg+0x238/0x304 net/socket.c:2659 __do_sys_sendmsg net/socket.c:2664 [inline] __se_sys_sendmsg net/socket.c:2662 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2662 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #1 (lock#7){+.+.}-{4:4}: __mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:730 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782 cma_init+0x2c/0x158 drivers/infiniband/core/cma.c:5454 do_one_initcall+0x254/0xaa4 init/main.c:1257 do_initcall_level+0x154/0x214 init/main.c:1319 do_initcalls+0x84/0xf4 init/main.c:1335 do_basic_setup+0x8c/0xa0 init/main.c:1354 kernel_init_freeable+0x324/0x478 init/main.c:1568 kernel_init+0x24/0x2a0 init/main.c:1457 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #0 (rtnl_mutex){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3163 [inline] check_prevs_add kernel/locking/lockdep.c:3282 [inline] validate_chain kernel/locking/lockdep.c:3906 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851 __mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:730 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 smc_vlan_by_tcpsk+0x32c/0x480 net/smc/smc_core.c:1908 __smc_connect+0x248/0x1914 net/smc/af_smc.c:1520 smc_connect+0x6bc/0xb30 net/smc/af_smc.c:1696 __sys_connect_file net/socket.c:2045 [inline] __sys_connect+0x260/0x294 net/socket.c:2064 __do_sys_connect net/socket.c:2070 [inline] __se_sys_connect net/socket.c:2067 [inline] __arm64_sys_connect+0x7c/0x94 net/socket.c:2067 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Chain exists of: rtnl_mutex --> lock#7 --> sk_lock-AF_INET Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET); lock(lock#7); lock(sk_lock-AF_INET); lock(rtnl_mutex); *** DEADLOCK *** 1 lock held by syz.1.265/7546: #0: ffff0000cda50258 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1624 [inline] #0: ffff0000cda50258 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_connect+0xc4/0xb30 net/smc/af_smc.c:1644 stack backtrace: CPU: 1 UID: 0 PID: 7546 Comm: syz.1.265 Not tainted 6.14.0-rc7-syzkaller-ga2392f333575 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2076 check_noncircular+0x310/0x404 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 kernel/locking/lockdep.c:3906 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851 __mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:730 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 smc_vlan_by_tcpsk+0x32c/0x480 net/smc/smc_core.c:1908 __smc_connect+0x248/0x1914 net/smc/af_smc.c:1520 smc_connect+0x6bc/0xb30 net/smc/af_smc.c:1696 __sys_connect_file net/socket.c:2045 [inline] __sys_connect+0x260/0x294 net/socket.c:2064 __do_sys_connect net/socket.c:2070 [inline] __se_sys_connect net/socket.c:2067 [inline] __arm64_sys_connect+0x7c/0x94 net/socket.c:2067 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600