[ 15.983984][ T361] ip (361) used greatest stack depth: 24192 bytes left [ 16.097865][ T368] br: port 1(veth1) entered blocking state [ 16.098341][ T368] br: port 1(veth1) entered disabled state [ 16.098749][ T368] veth1: entered allmulticast mode [ 16.100868][ T368] veth1: entered promiscuous mode [ 16.104528][ T40] br: port 1(veth1) entered blocking state [ 16.104934][ T40] br: port 1(veth1) entered forwarding state [ 16.226982][ T373] br: port 2(veth3) entered blocking state [ 16.227301][ T373] br: port 2(veth3) entered disabled state [ 16.227581][ T373] veth3: entered allmulticast mode [ 16.237711][ T373] veth3: entered promiscuous mode [ 16.239354][ T37] br: port 2(veth3) entered blocking state [ 16.239607][ T37] br: port 2(veth3) entered forwarding state [ 16.370817][ T378] br: port 3(veth4) entered blocking state [ 16.371280][ T378] br: port 3(veth4) entered disabled state [ 16.371713][ T378] veth4: entered allmulticast mode [ 16.375024][ T378] veth4: entered promiscuous mode [ 16.377362][ T38] br: port 3(veth4) entered blocking state [ 16.377763][ T38] br: port 3(veth4) entered forwarding state [ 17.065375][ T402] [ 17.065558][ T402] ============================================ [ 17.065798][ T402] WARNING: possible recursive locking detected [ 17.066037][ T402] 6.13.0-rc5-virtme #1 Not tainted [ 17.066213][ T402] -------------------------------------------- [ 17.066465][ T402] ip/402 is trying to acquire lock: [ 17.066636][ T402] ffffffffa19d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 17.067003][ T402] [ 17.067003][ T402] but task is already holding lock: [ 17.067276][ T402] ffffffffa19d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 17.067649][ T402] [ 17.067649][ T402] other info that might help us debug this: [ 17.067928][ T402] Possible unsafe locking scenario: [ 17.067928][ T402] [ 17.068197][ T402] CPU0 [ 17.068337][ T402] ---- [ 17.068477][ T402] lock((netdev_chain).rwsem); [ 17.068664][ T402] lock((netdev_chain).rwsem); [ 17.068851][ T402] [ 17.068851][ T402] *** DEADLOCK *** [ 17.068851][ T402] [ 17.069130][ T402] May be due to missing lock nesting notation [ 17.069130][ T402] [ 17.069398][ T402] 2 locks held by ip/402: [ 17.069563][ T402] #0: ffffffffa19e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x653/0xa70 [ 17.069899][ T402] #1: ffffffffa19d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 17.070283][ T402] [ 17.070283][ T402] stack backtrace: [ 17.070500][ T402] CPU: 2 UID: 0 PID: 402 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 17.070754][ T402] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 17.070967][ T402] Call Trace: [ 17.071096][ T402] [ 17.071187][ T402] dump_stack_lvl+0x82/0xd0 [ 17.071363][ T402] print_deadlock_bug+0x40a/0x650 [ 17.071536][ T402] validate_chain+0x5bf/0xae0 [ 17.071711][ T402] ? __pfx_validate_chain+0x10/0x10 [ 17.071884][ T402] ? hlock_class+0x4e/0x130 [ 17.072051][ T402] ? mark_lock+0x38/0x3e0 [ 17.072189][ T402] __lock_acquire+0xb9a/0x1680 [ 17.072358][ T402] ? rcu_read_lock_any_held+0x43/0xb0 [ 17.072530][ T402] lock_acquire.part.0+0xeb/0x330 [ 17.072700][ T402] ? blocking_notifier_call_chain+0x50/0x90 [ 17.072914][ T402] ? __pfx_validate_chain+0x10/0x10 [ 17.073086][ T402] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.073256][ T402] ? trace_lock_acquire+0x14c/0x1f0 [ 17.073429][ T402] ? lock_acquire+0x32/0xc0 [ 17.073616][ T402] ? blocking_notifier_call_chain+0x50/0x90 [ 17.073829][ T402] down_read+0x9f/0x340 [ 17.073958][ T402] ? blocking_notifier_call_chain+0x50/0x90 [ 17.074172][ T402] ? __pfx_down_read+0x10/0x10 [ 17.074341][ T402] ? find_held_lock+0x2c/0x110 [ 17.074516][ T402] blocking_notifier_call_chain+0x50/0x90 [ 17.074685][ T402] dev_set_mtu_ext+0x18c/0x510 [ 17.074857][ T402] ? __pfx_dev_set_mtu_ext+0x10/0x10 [ 17.075028][ T402] ? lockdep_hardirqs_on_prepare+0x12b/0x410 [ 17.075237][ T402] ? fib6_walk+0x28c/0x380 [ 17.075413][ T402] ? __local_bh_enable_ip+0xa6/0x120 [ 17.075585][ T402] ? __pfx_validate_chain+0x10/0x10 [ 17.075755][ T402] dev_set_mtu+0xa1/0x130 [ 17.075889][ T402] ? __pfx_dev_set_mtu+0x10/0x10 [ 17.076059][ T402] ? __lock_acquire+0xb9a/0x1680 [ 17.076231][ T402] ? __lock_release+0x103/0x460 [ 17.076399][ T402] ? packet_notifier+0x3a6/0x810 [ 17.076572][ T402] br_mtu_auto_adjust+0x189/0x270 [bridge] [ 17.076829][ T402] br_device_event+0x179/0x800 [bridge] [ 17.077036][ T402] ? __pfx_br_device_event+0x10/0x10 [bridge] [ 17.077278][ T402] ? packet_notifier+0x3b0/0x810 [ 17.077456][ T402] notifier_call_chain+0xcd/0x150 [ 17.077643][ T402] blocking_notifier_call_chain+0x66/0x90 [ 17.077813][ T402] dev_set_mtu_ext+0x2b6/0x510 [ 17.077981][ T402] ? __pfx_dev_set_mtu_ext+0x10/0x10 [ 17.078155][ T402] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 17.078368][ T402] ? __pfx_validate_chain+0x10/0x10 [ 17.078540][ T402] ? mark_lock+0x38/0x3e0 [ 17.078670][ T402] do_setlink.constprop.0+0x4b3/0x2300 [ 17.078846][ T402] ? __pfx_do_setlink.constprop.0+0x10/0x10 [ 17.079055][ T402] ? lock_acquire.part.0+0xeb/0x330 [ 17.079228][ T402] ? rtnl_newlink+0x653/0xa70 [ 17.079399][ T402] ? rtnl_newlink+0xb9/0xa70 [ 17.079567][ T402] ? rtnetlink_rcv_msg+0x712/0xc10 [ 17.079738][ T402] ? __mutex_trylock_common+0xfa/0x260 [ 17.079909][ T402] ? __pfx___mutex_trylock_common+0x10/0x10 [ 17.080122][ T402] ? lock_acquire+0x32/0xc0 [ 17.080304][ T402] ? trace_contention_end+0xef/0x150 [ 17.080480][ T402] ? __mutex_lock+0x190/0xbc0 [ 17.080648][ T402] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 17.080822][ T402] ? rtnl_newlink+0x653/0xa70 [ 17.080990][ T402] ? __pfx___mutex_lock+0x10/0x10 [ 17.081163][ T402] ? __rtnl_newlink+0x3f2/0xa80 [ 17.081333][ T402] rtnl_newlink+0x69c/0xa70 [ 17.081523][ T402] ? __pfx_rtnl_newlink+0x10/0x10 [ 17.081693][ T402] ? find_held_lock+0x2c/0x110 [ 17.081869][ T402] ? __pfx___lock_release+0x10/0x10 [ 17.082038][ T402] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.082210][ T402] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 17.082379][ T402] ? __pfx_rtnl_newlink+0x10/0x10 [ 17.082549][ T402] rtnetlink_rcv_msg+0x712/0xc10 [ 17.082718][ T402] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 17.082888][ T402] ? hlock_class+0x4e/0x130 [ 17.083061][ T402] ? mark_lock+0x38/0x3e0 [ 17.083191][ T402] ? __lock_acquire+0xb9a/0x1680 [ 17.083362][ T402] netlink_rcv_skb+0x130/0x360 [ 17.083533][ T402] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 17.083704][ T402] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 17.083876][ T402] ? netlink_deliver_tap+0x13e/0x340 [ 17.084047][ T402] ? netlink_deliver_tap+0xc3/0x340 [ 17.084226][ T402] netlink_unicast+0x44b/0x710 [ 17.084395][ T402] ? __pfx_netlink_unicast+0x10/0x10 [ 17.084565][ T402] ? find_held_lock+0x2c/0x110 [ 17.084735][ T402] netlink_sendmsg+0x723/0xbe0 [ 17.084908][ T402] ? __pfx_netlink_sendmsg+0x10/0x10 [ 17.085080][ T402] ____sys_sendmsg+0x7ac/0xa10 [ 17.085251][ T402] ? __pfx_____sys_sendmsg+0x10/0x10 [ 17.085425][ T402] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 17.085659][ T402] ___sys_sendmsg+0xee/0x170 [ 17.085832][ T402] ? __pfx____sys_sendmsg+0x10/0x10 [ 17.086001][ T402] ? kasan_save_stack+0x34/0x50 [ 17.086175][ T402] ? kasan_save_stack+0x24/0x50 [ 17.086344][ T402] ? __kasan_record_aux_stack+0x8e/0xa0 [ 17.086514][ T402] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 17.086732][ T402] ? __x64_sys_close+0x7c/0xd0 [ 17.086900][ T402] ? do_syscall_64+0xc1/0x1d0 [ 17.087069][ T402] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.087281][ T402] ? __lock_acquire+0xb9a/0x1680 [ 17.087451][ T402] ? find_held_lock+0x2c/0x110 [ 17.087622][ T402] ? __lock_release+0x103/0x460 [ 17.087791][ T402] ? __virt_addr_valid+0x22b/0x430 [ 17.087960][ T402] ? __pfx___lock_release+0x10/0x10 [ 17.088129][ T402] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.088301][ T402] __sys_sendmsg+0x109/0x1a0 [ 17.088469][ T402] ? __pfx___sys_sendmsg+0x10/0x10 [ 17.088636][ T402] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 17.088851][ T402] do_syscall_64+0xc1/0x1d0 [ 17.089024][ T402] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.089230][ T402] RIP: 0033:0x7f0ca98c29a7 [ 17.089415][ T402] 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 [ 17.090033][ T402] RSP: 002b:00007ffc16ef6f38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 17.090307][ T402] RAX: ffffffffffffffda RBX: 00007ffc16ef7660 RCX: 00007f0ca98c29a7 [ 17.090569][ T402] RDX: 0000000000000000 RSI: 00007ffc16ef6fa0 RDI: 0000000000000005 [ 17.090825][ T402] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000078 [ 17.091079][ T402] R10: 00007f0ca9780ef8 R11: 0000000000000246 R12: 0000000000000004 [ 17.091354][ T402] R13: 0000000067792cfc R14: 0000000000498600 R15: 0000000000000000 [ 17.091641][ T402] [ 17.097630][ T402] ip (402) used greatest stack depth: 23480 bytes left [ 103.644105][ T804] Mirror/redirect action on [ 137.260157][ T980] br: port 3(veth4) entered disabled state [ 137.260688][ T980] veth4: left allmulticast mode [ 137.260846][ T980] veth4: left promiscuous mode [ 137.261112][ T980] br: port 3(veth4) entered disabled state [ 137.348062][ T982] br: port 2(veth3) entered disabled state [ 137.348625][ T982] veth3: left allmulticast mode [ 137.348804][ T982] veth3: left promiscuous mode [ 137.349079][ T982] br: port 2(veth3) entered disabled state [ 137.418077][ T984] br: port 1(veth1) entered disabled state [ 137.418610][ T984] veth1: left allmulticast mode [ 137.418773][ T984] veth1: left promiscuous mode [ 137.419028][ T984] br: port 1(veth1) entered disabled state