program: r0 = openat$tun(0xffffffffffffff9c, &(0x7f0000000040), 0x0, 0x0) ioctl$TUNSETIFF(r0, 0x400454ca, &(0x7f00000000c0)={'syzkaller0\x00', 0x84aebfbd6349b7f2}) r1 = socket$netlink(0x10, 0x3, 0x14) sendmsg$RDMA_NLDEV_CMD_NEWLINK(r1, &(0x7f00000002c0)={0x0, 0x4, &(0x7f0000001200)={&(0x7f0000001080)=ANY=[@ANYBLOB="380000000314010000000000000000000900020053797a310000000808004100736977001400330073797a6b616c6c657230"], 0x38}}, 0x0) r2 = socket$nl_rdma(0x10, 0x3, 0x14) sendmsg$RDMA_NLDEV_CMD_STAT_GET(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000140)={&(0x7f0000000100)={0x30, 0x1411, 0x1, 0x0, 0x0, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8}, @RDMA_NLDEV_ATTR_PORT_INDEX={0x8, 0x3, 0x1}, @RDMA_NLDEV_ATTR_STAT_RES={0x8, 0x4b, 0x13}, @RDMA_NLDEV_ATTR_STAT_MODE={0x8}]}, 0x30}}, 0x0) r3 = socket$inet6(0xa, 0x1, 0x100) bind$inet6(r3, &(0x7f00000000c0)={0xa, 0x4e21, 0xb, @empty}, 0x1c) connect$inet6(r3, &(0x7f0000000000)={0xa, 0x4e21, 0x0, @ipv4={'\x00', '\xff\xff', @dev={0xac, 0x14, 0x14, 0x39}}}, 0x1c) [ 57.773920][ T5321] iwpm_register_pid: Unable to send a nlmsg (client = 2) [ 57.805549][ T5321] infiniband Syz1: RDMA CMA: cma_listen_on_dev, error -98 [ 57.829767][ T5322] [ 57.830752][ T5322] ====================================================== [ 57.833220][ T5322] WARNING: possible circular locking dependency detected [ 57.835965][ T5322] 6.14.0-syzkaller-10167-g93d52288679e #0 Not tainted [ 57.838732][ T5322] ------------------------------------------------------ [ 57.841663][ T5322] syz.0.0/5322 is trying to acquire lock: [ 57.843953][ T5322] ffffffff900f2fc8 (rtnl_mutex){+.+.}-{4:4}, at: smc_vlan_by_tcpsk+0x39b/0x4f0 [ 57.847794][ T5322] [ 57.847794][ T5322] but task is already holding lock: [ 57.850654][ T5322] ffff8880438d0258 (sk_lock-AF_INET6){+.+.}-{0:0}, at: smc_connect+0xb7/0xde0 [ 57.854131][ T5322] [ 57.854131][ T5322] which lock already depends on the new lock. [ 57.854131][ T5322] [ 57.858201][ T5322] [ 57.858201][ T5322] the existing dependency chain (in reverse order) is: [ 57.861503][ T5322] [ 57.861503][ T5322] -> #2 (sk_lock-AF_INET6){+.+.}-{0:0}: [ 57.864546][ T5322] lock_acquire+0x116/0x2f0 [ 57.866450][ T5322] lock_sock_nested+0x48/0x100 [ 57.868407][ T5322] sock_set_reuseaddr+0x17/0x60 [ 57.870314][ T5322] siw_create_listen+0x19f/0x1250 [ 57.872511][ T5322] iw_cm_listen+0x15e/0x230 [ 57.874404][ T5322] rdma_listen+0xb51/0xe40 [ 57.876337][ T5322] cma_listen_on_dev+0x3e0/0x6f0 [ 57.878366][ T5322] cma_add_one+0x7dc/0xce0 [ 57.880270][ T5322] add_client_context+0x53e/0x8b0 [ 57.882366][ T5322] enable_device_and_get+0x1de/0x450 [ 57.884603][ T5322] ib_register_device+0x1138/0x1460 [ 57.886881][ T5322] siw_newlink+0x938/0xda0 [ 57.888778][ T5322] nldev_newlink+0x5ed/0x680 [ 57.890721][ T5322] rdma_nl_rcv+0x6e5/0x9e0 [ 57.892605][ T5322] netlink_unicast+0x7f8/0x9a0 [ 57.894589][ T5322] netlink_sendmsg+0x8c3/0xcd0 [ 57.896580][ T5322] __sock_sendmsg+0x221/0x270 [ 57.898867][ T5322] ____sys_sendmsg+0x523/0x860 [ 57.900905][ T5322] __sys_sendmsg+0x271/0x360 [ 57.902880][ T5322] do_syscall_64+0xf3/0x230 [ 57.904735][ T5322] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 57.907217][ T5322] [ 57.907217][ T5322] -> #1 (lock#8){+.+.}-{4:4}: [ 57.909940][ T5322] lock_acquire+0x116/0x2f0 [ 57.911936][ T5322] __mutex_lock+0x1a5/0x10c0 [ 57.913926][ T5322] cma_init+0x1e/0x140 [ 57.915776][ T5322] do_one_initcall+0x24a/0x940 [ 57.917913][ T5322] do_initcall_level+0x157/0x210 [ 57.919949][ T5322] do_initcalls+0x71/0xd0 [ 57.921864][ T5322] kernel_init_freeable+0x432/0x5d0 [ 57.924106][ T5322] kernel_init+0x1d/0x2b0 [ 57.926030][ T5322] ret_from_fork+0x4b/0x80 [ 57.927998][ T5322] ret_from_fork_asm+0x1a/0x30 [ 57.930069][ T5322] [ 57.930069][ T5322] -> #0 (rtnl_mutex){+.+.}-{4:4}: [ 57.932927][ T5322] validate_chain+0xa69/0x24e0 [ 57.935002][ T5322] __lock_acquire+0xad5/0xd80 [ 57.937101][ T5322] lock_acquire+0x116/0x2f0 [ 57.939012][ T5322] __mutex_lock+0x1a5/0x10c0 [ 57.941066][ T5322] smc_vlan_by_tcpsk+0x39b/0x4f0 [ 57.943228][ T5322] __smc_connect+0x296/0x1920 [ 57.945253][ T5322] smc_connect+0x868/0xde0 [ 57.947228][ T5322] __sys_connect+0x28c/0x2d0 [ 57.949278][ T5322] __x64_sys_connect+0x7a/0x90 [ 57.951468][ T5322] do_syscall_64+0xf3/0x230 [ 57.953472][ T5322] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 57.956095][ T5322] [ 57.956095][ T5322] other info that might help us debug this: [ 57.956095][ T5322] [ 57.960331][ T5322] Chain exists of: [ 57.960331][ T5322] rtnl_mutex --> lock#8 --> sk_lock-AF_INET6 [ 57.960331][ T5322] [ 57.964962][ T5322] Possible unsafe locking scenario: [ 57.964962][ T5322] [ 57.967972][ T5322] CPU0 CPU1 [ 57.970093][ T5322] ---- ---- [ 57.972206][ T5322] lock(sk_lock-AF_INET6); [ 57.974017][ T5322] lock(lock#8); [ 57.976506][ T5322] lock(sk_lock-AF_INET6); [ 57.979248][ T5322] lock(rtnl_mutex); [ 57.980878][ T5322] [ 57.980878][ T5322] *** DEADLOCK *** [ 57.980878][ T5322] [ 57.983913][ T5322] 1 lock held by syz.0.0/5322: [ 57.985763][ T5322] #0: ffff8880438d0258 (sk_lock-AF_INET6){+.+.}-{0:0}, at: smc_connect+0xb7/0xde0 [ 57.989449][ T5322] [ 57.989449][ T5322] stack backtrace: [ 57.991828][ T5322] CPU: 0 UID: 0 PID: 5322 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-10167-g93d52288679e #0 PREEMPT(full) [ 57.991843][ T5322] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 57.991850][ T5322] Call Trace: [ 57.991857][ T5322] [ 57.991862][ T5322] dump_stack_lvl+0x241/0x360 [ 57.991883][ T5322] ? __pfx_dump_stack_lvl+0x10/0x10 [ 57.991897][ T5322] ? __pfx__printk+0x10/0x10 [ 57.991911][ T5322] ? print_lock+0x171/0x1a0 [ 57.991924][ T5322] print_circular_bug+0x2e1/0x300 [ 57.991937][ T5322] check_noncircular+0x142/0x160 [ 57.991949][ T5322] validate_chain+0xa69/0x24e0 [ 57.991965][ T5322] __lock_acquire+0xad5/0xd80 [ 57.991977][ T5322] lock_acquire+0x116/0x2f0 [ 57.991993][ T5322] ? smc_vlan_by_tcpsk+0x39b/0x4f0 [ 57.992012][ T5322] ? kasan_save_track+0x51/0x80 [ 57.992081][ T5322] __mutex_lock+0x1a5/0x10c0 [ 57.992098][ T5322] ? smc_vlan_by_tcpsk+0x39b/0x4f0 [ 57.992116][ T5322] ? smc_vlan_by_tcpsk+0x39b/0x4f0 [ 57.992133][ T5322] ? __pfx___mutex_lock+0x10/0x10 [ 57.992150][ T5322] smc_vlan_by_tcpsk+0x39b/0x4f0 [ 57.992168][ T5322] ? __pfx_smc_vlan_by_tcpsk+0x10/0x10 [ 57.992192][ T5322] ? __kmalloc_cache_noprof+0x236/0x370 [ 57.992208][ T5322] ? __smc_connect+0x1c7/0x1920 [ 57.992224][ T5322] __smc_connect+0x296/0x1920 [ 57.992243][ T5322] ? do_raw_spin_unlock+0x58/0x8b0 [ 57.992259][ T5322] smc_connect+0x868/0xde0 [ 57.992274][ T5322] __sys_connect+0x28c/0x2d0 [ 57.992289][ T5322] ? __pfx___sys_connect+0x10/0x10 [ 57.992305][ T5322] __x64_sys_connect+0x7a/0x90 [ 57.992318][ T5322] do_syscall_64+0xf3/0x230 [ 57.992334][ T5322] ? clear_bhb_loop+0x45/0xa0 [ 57.992347][ T5322] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 57.992358][ T5322] RIP: 0033:0x7f6baef8d169 [ 57.992376][ T5322] 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 [ 57.992387][ T5322] RSP: 002b:00007f6bab3f5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 57.992400][ T5322] RAX: ffffffffffffffda RBX: 00007f6baf1a6080 RCX: 00007f6baef8d169 [ 57.992410][ T5322] RDX: 000000000000001c RSI: 0000200000000000 RDI: 0000000000000006 [ 57.992417][ T5322] RBP: 00007f6baf00e2a0 R08: 0000000000000000 R09: 0000000000000000 [ 57.992424][ T5322] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 57.992431][ T5322] R13: 0000000000000000 R14: 00007f6baf1a6080 R15: 00007fff20f21e48 [ 57.992442][ T5322] [ 58.089500][ T4669] Bluetooth: hci0: command tx timeout