[ 16.125831][ T370] br: port 1(veth1) entered blocking state [ 16.126272][ T370] br: port 1(veth1) entered disabled state [ 16.126621][ T370] veth1: entered allmulticast mode [ 16.129015][ T370] veth1: entered promiscuous mode [ 16.131521][ T37] br: port 1(veth1) entered blocking state [ 16.131894][ T37] br: port 1(veth1) entered forwarding state [ 16.269291][ T375] br: port 2(veth3) entered blocking state [ 16.269616][ T375] br: port 2(veth3) entered disabled state [ 16.270238][ T375] veth3: entered allmulticast mode [ 16.272176][ T375] veth3: entered promiscuous mode [ 16.273935][ T71] br: port 2(veth3) entered blocking state [ 16.274211][ T71] br: port 2(veth3) entered forwarding state [ 16.407330][ T380] br: port 3(veth4) entered blocking state [ 16.407629][ T380] br: port 3(veth4) entered disabled state [ 16.407929][ T380] veth4: entered allmulticast mode [ 16.410221][ T380] veth4: entered promiscuous mode [ 16.411621][ T37] br: port 3(veth4) entered blocking state [ 16.411921][ T37] br: port 3(veth4) entered forwarding state [ 17.073467][ T404] [ 17.073607][ T404] ============================================ [ 17.073817][ T404] WARNING: possible recursive locking detected [ 17.074035][ T404] 6.13.0-rc5-virtme #1 Not tainted [ 17.074211][ T404] -------------------------------------------- [ 17.074424][ T404] ip/404 is trying to acquire lock: [ 17.074592][ T404] ffffffff9d1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 17.074923][ T404] [ 17.074923][ T404] but task is already holding lock: [ 17.075158][ T404] ffffffff9d1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 17.075467][ T404] [ 17.075467][ T404] other info that might help us debug this: [ 17.075691][ T404] Possible unsafe locking scenario: [ 17.075691][ T404] [ 17.075934][ T404] CPU0 [ 17.076047][ T404] ---- [ 17.076169][ T404] lock((netdev_chain).rwsem); [ 17.076322][ T404] lock((netdev_chain).rwsem); [ 17.076473][ T404] [ 17.076473][ T404] *** DEADLOCK *** [ 17.076473][ T404] [ 17.076704][ T404] May be due to missing lock nesting notation [ 17.076704][ T404] [ 17.076970][ T404] 2 locks held by ip/404: [ 17.077112][ T404] #0: ffffffff9d1e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x653/0xa70 [ 17.077390][ T404] #1: ffffffff9d1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 17.077763][ T404] [ 17.077763][ T404] stack backtrace: [ 17.077966][ T404] CPU: 2 UID: 0 PID: 404 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 17.078314][ T404] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 17.078583][ T404] Call Trace: [ 17.078704][ T404] [ 17.078784][ T404] dump_stack_lvl+0x82/0xd0 [ 17.078954][ T404] print_deadlock_bug+0x40a/0x650 [ 17.079107][ T404] validate_chain+0x5bf/0xae0 [ 17.079262][ T404] ? __pfx_validate_chain+0x10/0x10 [ 17.079416][ T404] ? hlock_class+0x4e/0x130 [ 17.079570][ T404] ? mark_lock+0x38/0x3e0 [ 17.079687][ T404] __lock_acquire+0xb9a/0x1680 [ 17.079841][ T404] ? rcu_read_lock_any_held+0x43/0xb0 [ 17.080011][ T404] lock_acquire.part.0+0xeb/0x330 [ 17.080170][ T404] ? blocking_notifier_call_chain+0x50/0x90 [ 17.080360][ T404] ? __pfx_validate_chain+0x10/0x10 [ 17.080513][ T404] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.080680][ T404] ? trace_lock_acquire+0x14c/0x1f0 [ 17.080848][ T404] ? lock_acquire+0x32/0xc0 [ 17.081020][ T404] ? blocking_notifier_call_chain+0x50/0x90 [ 17.081227][ T404] down_read+0x9f/0x340 [ 17.081357][ T404] ? blocking_notifier_call_chain+0x50/0x90 [ 17.081562][ T404] ? __pfx_down_read+0x10/0x10 [ 17.081726][ T404] ? find_held_lock+0x2c/0x110 [ 17.081909][ T404] blocking_notifier_call_chain+0x50/0x90 [ 17.082074][ T404] dev_set_mtu_ext+0x18c/0x510 [ 17.082241][ T404] ? __pfx_dev_set_mtu_ext+0x10/0x10 [ 17.082408][ T404] ? lockdep_hardirqs_on_prepare+0x12b/0x410 [ 17.082619][ T404] ? fib6_walk+0x28c/0x380 [ 17.082787][ T404] ? __local_bh_enable_ip+0xa6/0x120 [ 17.082962][ T404] ? __pfx_validate_chain+0x10/0x10 [ 17.083131][ T404] dev_set_mtu+0xa1/0x130 [ 17.083258][ T404] ? __pfx_dev_set_mtu+0x10/0x10 [ 17.083424][ T404] ? __lock_acquire+0xb9a/0x1680 [ 17.083595][ T404] ? __lock_release+0x103/0x460 [ 17.083756][ T404] ? packet_notifier+0x3a6/0x810 [ 17.083924][ T404] br_mtu_auto_adjust+0x189/0x270 [bridge] [ 17.084152][ T404] br_device_event+0x179/0x800 [bridge] [ 17.084423][ T404] ? __pfx_br_device_event+0x10/0x10 [bridge] [ 17.084636][ T404] ? packet_notifier+0x3b0/0x810 [ 17.084790][ T404] notifier_call_chain+0xcd/0x150 [ 17.084958][ T404] blocking_notifier_call_chain+0x66/0x90 [ 17.085118][ T404] dev_set_mtu_ext+0x2b6/0x510 [ 17.085276][ T404] ? __pfx_dev_set_mtu_ext+0x10/0x10 [ 17.085428][ T404] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 17.085620][ T404] ? __pfx_validate_chain+0x10/0x10 [ 17.085776][ T404] ? mark_lock+0x38/0x3e0 [ 17.085904][ T404] do_setlink.constprop.0+0x4b3/0x2300 [ 17.086062][ T404] ? __pfx_do_setlink.constprop.0+0x10/0x10 [ 17.086256][ T404] ? lock_acquire.part.0+0xeb/0x330 [ 17.086421][ T404] ? rtnl_newlink+0x653/0xa70 [ 17.086605][ T404] ? rtnl_newlink+0xb9/0xa70 [ 17.086786][ T404] ? rtnetlink_rcv_msg+0x712/0xc10 [ 17.086984][ T404] ? __mutex_trylock_common+0xfa/0x260 [ 17.087202][ T404] ? __pfx___mutex_trylock_common+0x10/0x10 [ 17.087498][ T404] ? lock_acquire+0x32/0xc0 [ 17.087749][ T404] ? trace_contention_end+0xef/0x150 [ 17.087979][ T404] ? __mutex_lock+0x190/0xbc0 [ 17.088224][ T404] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 17.088461][ T404] ? rtnl_newlink+0x653/0xa70 [ 17.088700][ T404] ? __pfx___mutex_lock+0x10/0x10 [ 17.088945][ T404] ? __rtnl_newlink+0x3f2/0xa80 [ 17.089188][ T404] rtnl_newlink+0x69c/0xa70 [ 17.089432][ T404] ? __pfx_rtnl_newlink+0x10/0x10 [ 17.089680][ T404] ? find_held_lock+0x2c/0x110 [ 17.089923][ T404] ? __pfx___lock_release+0x10/0x10 [ 17.090164][ T404] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.090410][ T404] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 17.090657][ T404] ? __pfx_rtnl_newlink+0x10/0x10 [ 17.090894][ T404] rtnetlink_rcv_msg+0x712/0xc10 [ 17.091093][ T404] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 17.091249][ T404] ? hlock_class+0x4e/0x130 [ 17.091402][ T404] ? mark_lock+0x38/0x3e0 [ 17.091519][ T404] ? __lock_acquire+0xb9a/0x1680 [ 17.091703][ T404] netlink_rcv_skb+0x130/0x360 [ 17.091889][ T404] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 17.092042][ T404] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 17.092198][ T404] ? netlink_deliver_tap+0x13e/0x340 [ 17.092357][ T404] ? netlink_deliver_tap+0xc3/0x340 [ 17.092508][ T404] netlink_unicast+0x44b/0x710 [ 17.092657][ T404] ? __pfx_netlink_unicast+0x10/0x10 [ 17.092809][ T404] ? find_held_lock+0x2c/0x110 [ 17.093031][ T404] netlink_sendmsg+0x723/0xbe0 [ 17.093264][ T404] ? __pfx_netlink_sendmsg+0x10/0x10 [ 17.093509][ T404] ____sys_sendmsg+0x7ac/0xa10 [ 17.093764][ T404] ? __pfx_____sys_sendmsg+0x10/0x10 [ 17.094015][ T404] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 17.094322][ T404] ___sys_sendmsg+0xee/0x170 [ 17.094566][ T404] ? __pfx____sys_sendmsg+0x10/0x10 [ 17.094805][ T404] ? kasan_save_stack+0x34/0x50 [ 17.095028][ T404] ? kasan_save_stack+0x24/0x50 [ 17.095254][ T404] ? __kasan_record_aux_stack+0x8e/0xa0 [ 17.095485][ T404] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 17.095764][ T404] ? __x64_sys_close+0x7c/0xd0 [ 17.095990][ T404] ? do_syscall_64+0xc1/0x1d0 [ 17.096215][ T404] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.096493][ T404] ? __lock_acquire+0xb9a/0x1680 [ 17.096744][ T404] ? find_held_lock+0x2c/0x110 [ 17.096993][ T404] ? __lock_release+0x103/0x460 [ 17.097234][ T404] ? __virt_addr_valid+0x22b/0x430 [ 17.097479][ T404] ? __pfx___lock_release+0x10/0x10 [ 17.097715][ T404] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.097944][ T404] __sys_sendmsg+0x109/0x1a0 [ 17.098163][ T404] ? __pfx___sys_sendmsg+0x10/0x10 [ 17.098382][ T404] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 17.098683][ T404] do_syscall_64+0xc1/0x1d0 [ 17.098915][ T404] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.099192][ T404] RIP: 0033:0x7f77920859a7 [ 17.099442][ T404] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 17.100250][ T404] RSP: 002b:00007fffe47a2f18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 17.100609][ T404] RAX: ffffffffffffffda RBX: 00007fffe47a3640 RCX: 00007f77920859a7 [ 17.100971][ T404] RDX: 0000000000000000 RSI: 00007fffe47a2f80 RDI: 0000000000000005 [ 17.101331][ T404] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000078 [ 17.101670][ T404] R10: 00007f7791f43ef8 R11: 0000000000000246 R12: 0000000000000004 [ 17.102029][ T404] R13: 00000000677955a1 R14: 0000000000498600 R15: 0000000000000000 [ 17.102371][ T404] [ 17.117462][ T404] ip (404) used greatest stack depth: 23456 bytes left [ 103.381409][ T806] Mirror/redirect action on [ 137.138286][ T982] br: port 3(veth4) entered disabled state [ 137.138964][ T982] veth4: left allmulticast mode [ 137.139161][ T982] veth4: left promiscuous mode [ 137.139434][ T982] br: port 3(veth4) entered disabled state [ 137.224978][ T984] br: port 2(veth3) entered disabled state [ 137.225457][ T984] veth3: left allmulticast mode [ 137.225644][ T984] veth3: left promiscuous mode [ 137.225929][ T984] br: port 2(veth3) entered disabled state [ 137.293766][ T986] br: port 1(veth1) entered disabled state [ 137.294278][ T986] veth1: left allmulticast mode [ 137.294426][ T986] veth1: left promiscuous mode [ 137.294711][ T986] br: port 1(veth1) entered disabled state