[ 135.591042][ T892] [ 135.591218][ T892] ============================================ [ 135.591505][ T892] WARNING: possible recursive locking detected [ 135.591784][ T892] 6.14.0-rc7-virtme #1 Not tainted [ 135.592015][ T892] -------------------------------------------- [ 135.592297][ T892] ip/892 is trying to acquire lock: [ 135.592514][ T892] ffff88800a046580 (&nh->lock){+...}-{3:3}, at: fib6_purge_rt+0x14a/0x910 [ 135.592880][ T892] [ 135.592880][ T892] but task is already holding lock: [ 135.593225][ T892] ffff888002150780 (&nh->lock){+...}-{3:3}, at: fib6_add+0x177/0xb00 [ 135.593601][ T892] [ 135.593601][ T892] other info that might help us debug this: [ 135.593949][ T892] Possible unsafe locking scenario: [ 135.593949][ T892] [ 135.594297][ T892] CPU0 [ 135.594485][ T892] ---- [ 135.594666][ T892] lock(&nh->lock); [ 135.594853][ T892] lock(&nh->lock); [ 135.595032][ T892] [ 135.595032][ T892] *** DEADLOCK *** [ 135.595032][ T892] [ 135.595396][ T892] May be due to missing lock nesting notation [ 135.595396][ T892] [ 135.595755][ T892] 3 locks held by ip/892: [ 135.595937][ T892] #0: ffffffff9b75b620 (rcu_read_lock){....}-{1:3}, at: ip6_route_add+0x3e/0x250 [ 135.596387][ T892] #1: ffff8880056fd030 (&tb->tb6_lock){+...}-{3:3}, at: ip6_route_add+0xdb/0x250 [ 135.596824][ T892] #2: ffff888002150780 (&nh->lock){+...}-{3:3}, at: fib6_add+0x177/0xb00 [ 135.597207][ T892] [ 135.597207][ T892] stack backtrace: [ 135.597508][ T892] CPU: 3 UID: 0 PID: 892 Comm: ip Not tainted 6.14.0-rc7-virtme #1 [ 135.597515][ T892] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 135.597518][ T892] Call Trace: [ 135.597521][ T892] [ 135.597524][ T892] dump_stack_lvl+0x82/0xd0 [ 135.597533][ T892] print_deadlock_bug+0x2e9/0x410 [ 135.597542][ T892] validate_chain+0x5bf/0xae0 [ 135.597552][ T892] ? __pfx_validate_chain+0x10/0x10 [ 135.597558][ T892] ? hlock_class+0x4e/0x130 [ 135.597563][ T892] ? mark_lock+0x38/0x3e0 [ 135.597571][ T892] __lock_acquire+0xb9a/0x1680 [ 135.597582][ T892] lock_acquire.part.0+0xeb/0x330 [ 135.597587][ T892] ? fib6_purge_rt+0x14a/0x910 [ 135.597595][ T892] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 135.597601][ T892] ? trace_lock_acquire+0x14c/0x1f0 [ 135.597608][ T892] ? lock_acquire+0x32/0xc0 [ 135.597613][ T892] ? fib6_purge_rt+0x14a/0x910 [ 135.597621][ T892] _raw_spin_lock+0x30/0x40 [ 135.597626][ T892] ? fib6_purge_rt+0x14a/0x910 [ 135.597631][ T892] fib6_purge_rt+0x14a/0x910 [ 135.597639][ T892] ? __pfx_fib6_purge_rt+0x10/0x10 [ 135.597647][ T892] ? nlmsg_notify+0x6e/0x1e0 [ 135.597655][ T892] fib6_add_rt2node+0x1425/0x2ab0 [ 135.597668][ T892] ? __pfx_fib6_add_rt2node+0x10/0x10 [ 135.597673][ T892] ? do_raw_spin_lock+0x131/0x270 [ 135.597679][ T892] ? lock_acquire+0x32/0xc0 [ 135.597684][ T892] ? fib6_add+0x177/0xb00 [ 135.597693][ T892] fib6_add+0x305/0xb00 [ 135.597701][ T892] ip6_route_add+0xed/0x250 [ 135.597706][ T892] ? __pfx_inet6_rtm_newroute+0x10/0x10 [ 135.597711][ T892] inet6_rtm_newroute+0x104/0x110 [ 135.597716][ T892] ? __pfx_inet6_rtm_newroute+0x10/0x10 [ 135.597731][ T892] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 135.597739][ T892] rtnetlink_rcv_msg+0x712/0xc10 [ 135.597745][ T892] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 135.597750][ T892] ? hlock_class+0x4e/0x130 [ 135.597754][ T892] ? mark_lock+0x38/0x3e0 [ 135.597763][ T892] ? __lock_acquire+0xb9a/0x1680 [ 135.597771][ T892] netlink_rcv_skb+0x130/0x360 [ 135.597776][ T892] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 135.597782][ T892] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 135.597796][ T892] ? netlink_deliver_tap+0x13e/0x340 [ 135.597802][ T892] ? netlink_deliver_tap+0xc3/0x340 [ 135.597808][ T892] netlink_unicast+0x44b/0x710 [ 135.597816][ T892] ? __pfx_netlink_unicast+0x10/0x10 [ 135.597821][ T892] ? find_held_lock+0x2c/0x110 [ 135.597829][ T892] netlink_sendmsg+0x723/0xbe0 [ 135.597837][ T892] ? __pfx_netlink_sendmsg+0x10/0x10 [ 135.597849][ T892] ____sys_sendmsg+0x7ac/0xa10 [ 135.597858][ T892] ? __pfx_____sys_sendmsg+0x10/0x10 [ 135.597864][ T892] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 135.597877][ T892] ___sys_sendmsg+0xee/0x170 [ 135.597883][ T892] ? __pfx____sys_sendmsg+0x10/0x10 [ 135.597891][ T892] ? ___sys_recvmsg+0xe0/0x150 [ 135.597897][ T892] ? __pfx____sys_recvmsg+0x10/0x10 [ 135.597904][ T892] ? do_user_addr_fault+0x8fd/0xe30 [ 135.597910][ T892] ? do_user_addr_fault+0x8fd/0xe30 [ 135.597918][ T892] ? find_held_lock+0x2c/0x110 [ 135.597925][ T892] ? __lock_release+0x103/0x460 [ 135.597932][ T892] __sys_sendmsg+0x109/0x1a0 [ 135.597938][ T892] ? __pfx___sys_sendmsg+0x10/0x10 [ 135.597947][ T892] ? do_user_addr_fault+0x97c/0xe30 [ 135.597956][ T892] do_syscall_64+0xc1/0x1d0 [ 135.597964][ T892] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 135.597970][ T892] RIP: 0033:0x7f2c4f4e89a7 [ 135.597977][ T892] 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 [ 135.597982][ T892] RSP: 002b:00007ffd40376a88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 135.597987][ T892] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2c4f4e89a7 [ 135.597991][ T892] RDX: 0000000000000000 RSI: 00007ffd40376af0 RDI: 0000000000000005 [ 135.597994][ T892] RBP: 00007ffd40379028 R08: 0000000000000004 R09: 0000000000000000 [ 135.597997][ T892] R10: 00007f2c4f537ac0 R11: 0000000000000246 R12: 00007ffd40377e00 [ 135.598000][ T892] R13: 0000000067dd5999 R14: 0000000000498600 R15: 0000000000000001 [ 135.598010][ T892]