[ 142.468380][ T1344] netdevsim netdevsim1337 eni1337np1: renamed from eth0 [ 142.778457][ T1349] [ 142.778578][ T1349] ====================================================== [ 142.778755][ T1349] WARNING: possible circular locking dependency detected [ 142.778928][ T1349] 6.12.0-rc5-virtme #1 Not tainted [ 142.779081][ T1349] ------------------------------------------------------ [ 142.779258][ T1349] ip/1349 is trying to acquire lock: [ 142.779406][ T1349] ffffffffbd9d3948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_newlink+0x64b/0xa30 [ 142.779629][ T1349] [ 142.779629][ T1349] but task is already holding lock: [ 142.779848][ T1349] ffffffffbdb67b00 (&ops->srcu){.+.+}-{0:0}, at: rtnl_link_ops_get+0xe7/0x220 [ 142.780095][ T1349] [ 142.780095][ T1349] which lock already depends on the new lock. [ 142.780095][ T1349] [ 142.780371][ T1349] [ 142.780371][ T1349] the existing dependency chain (in reverse order) is: [ 142.780610][ T1349] [ 142.780610][ T1349] -> #1 (&ops->srcu){.+.+}-{0:0}: [ 142.780828][ T1349] __lock_acquire+0xb3f/0x1580 [ 142.780981][ T1349] lock_sync+0xd7/0x180 [ 142.781141][ T1349] __synchronize_srcu+0x9e/0x2b0 [ 142.781285][ T1349] __rtnl_link_unregister+0x14a/0x380 [ 142.781503][ T1349] rtnl_link_unregister+0x14c/0x1c0 [ 142.781639][ T1349] nsim_module_exit+0x10/0x1a [netdevsim] [ 142.781841][ T1349] __do_sys_delete_module+0x2bd/0x470 [ 142.782012][ T1349] do_syscall_64+0xc1/0x1d0 [ 142.782180][ T1349] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 142.782347][ T1349] [ 142.782347][ T1349] -> #0 (rtnl_mutex){+.+.}-{3:3}: [ 142.782556][ T1349] check_prev_add+0x182/0xce0 [ 142.782704][ T1349] validate_chain+0x71d/0x9b0 [ 142.782837][ T1349] __lock_acquire+0xb3f/0x1580 [ 142.782970][ T1349] lock_acquire.part.0+0xeb/0x330 [ 142.783103][ T1349] __mutex_lock+0x149/0xac0 [ 142.783237][ T1349] rtnl_newlink+0x64b/0xa30 [ 142.783373][ T1349] rtnetlink_rcv_msg+0x712/0xc10 [ 142.783517][ T1349] netlink_rcv_skb+0x130/0x360 [ 142.783666][ T1349] netlink_unicast+0x44b/0x710 [ 142.783799][ T1349] netlink_sendmsg+0x723/0xbe0 [ 142.783938][ T1349] ____sys_sendmsg+0x7ac/0xa10 [ 142.784084][ T1349] ___sys_sendmsg+0xee/0x170 [ 142.784224][ T1349] __sys_sendmsg+0xcd/0x170 [ 142.784362][ T1349] do_syscall_64+0xc1/0x1d0 [ 142.784497][ T1349] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 142.784664][ T1349] [ 142.784664][ T1349] other info that might help us debug this: [ 142.784664][ T1349] [ 142.784930][ T1349] Possible unsafe locking scenario: [ 142.784930][ T1349] [ 142.785129][ T1349] CPU0 CPU1 [ 142.785276][ T1349] ---- ---- [ 142.785409][ T1349] rlock(&ops->srcu); [ 142.785511][ T1349] lock(rtnl_mutex); [ 142.785681][ T1349] lock(&ops->srcu); [ 142.785853][ T1349] lock(rtnl_mutex); [ 142.785959][ T1349] [ 142.785959][ T1349] *** DEADLOCK *** [ 142.785959][ T1349] [ 142.786150][ T1349] 1 lock held by ip/1349: [ 142.786256][ T1349] #0: ffffffffbdb67b00 (&ops->srcu){.+.+}-{0:0}, at: rtnl_link_ops_get+0xe7/0x220 [ 142.786492][ T1349] [ 142.786492][ T1349] stack backtrace: [ 142.786661][ T1349] CPU: 0 UID: 0 PID: 1349 Comm: ip Not tainted 6.12.0-rc5-virtme #1 [ 142.786868][ T1349] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 142.787167][ T1349] Call Trace: [ 142.787279][ T1349] [ 142.787353][ T1349] dump_stack_lvl+0x82/0xd0 [ 142.787499][ T1349] print_circular_bug+0x2e2/0x4b0 [ 142.787634][ T1349] check_noncircular+0x2f9/0x3e0 [ 142.787864][ T1349] ? __pfx_check_noncircular+0x10/0x10 [ 142.788012][ T1349] ? get_reg+0x119/0x190 [ 142.788122][ T1349] ? alloc_chain_hlocks+0x4e0/0x720 [ 142.788262][ T1349] check_prev_add+0x182/0xce0 [ 142.788402][ T1349] validate_chain+0x71d/0x9b0 [ 142.788539][ T1349] ? __pfx_validate_chain+0x10/0x10 [ 142.788676][ T1349] ? hlock_class+0x4e/0x130 [ 142.788811][ T1349] ? mark_lock+0x38/0x3e0 [ 142.788913][ T1349] ? validate_chain+0x506/0x9b0 [ 142.789054][ T1349] __lock_acquire+0xb3f/0x1580 [ 142.789191][ T1349] ? check_prev_add+0xca0/0xce0 [ 142.789329][ T1349] lock_acquire.part.0+0xeb/0x330 [ 142.789463][ T1349] ? rtnl_newlink+0x64b/0xa30 [ 142.789598][ T1349] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 142.789729][ T1349] ? trace_lock_acquire+0x14d/0x1f0 [ 142.789865][ T1349] ? rtnl_newlink+0x64b/0xa30 [ 142.789994][ T1349] ? lock_acquire+0x32/0xc0 [ 142.790127][ T1349] ? rtnl_newlink+0x64b/0xa30 [ 142.790265][ T1349] __mutex_lock+0x149/0xac0 [ 142.790402][ T1349] ? rtnl_newlink+0x64b/0xa30 [ 142.790543][ T1349] ? __lock_release+0x21c/0x460 [ 142.790684][ T1349] ? rtnl_newlink+0x64b/0xa30 [ 142.790822][ T1349] ? __pfx___mutex_lock+0x10/0x10 [ 142.790963][ T1349] ? trace_lock_acquire+0x14d/0x1f0 [ 142.791104][ T1349] ? rtnl_newlink+0x64b/0xa30 [ 142.791242][ T1349] rtnl_newlink+0x64b/0xa30 [ 142.791377][ T1349] ? __pfx_rtnl_newlink+0x10/0x10 [ 142.791520][ T1349] ? find_held_lock+0x2c/0x110 [ 142.791662][ T1349] ? __pfx___lock_release+0x10/0x10 [ 142.791801][ T1349] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 142.791938][ T1349] ? __pfx_rtnl_newlink+0x10/0x10 [ 142.792090][ T1349] rtnetlink_rcv_msg+0x712/0xc10 [ 142.792233][ T1349] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 142.792368][ T1349] ? hlock_class+0x4e/0x130 [ 142.792514][ T1349] ? mark_lock+0x38/0x3e0 [ 142.792626][ T1349] ? __lock_acquire+0xb3f/0x1580 [ 142.792780][ T1349] netlink_rcv_skb+0x130/0x360 [ 142.792922][ T1349] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 142.793061][ T1349] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 142.793202][ T1349] ? netlink_deliver_tap+0x13e/0x340 [ 142.793342][ T1349] ? netlink_deliver_tap+0xc3/0x340 [ 142.793483][ T1349] netlink_unicast+0x44b/0x710 [ 142.793623][ T1349] ? __pfx_netlink_unicast+0x10/0x10 [ 142.793762][ T1349] ? find_held_lock+0x2c/0x110 [ 142.793899][ T1349] netlink_sendmsg+0x723/0xbe0 [ 142.794122][ T1349] ? __pfx_netlink_sendmsg+0x10/0x10 [ 142.794261][ T1349] ____sys_sendmsg+0x7ac/0xa10 [ 142.794409][ T1349] ? __pfx_____sys_sendmsg+0x10/0x10 [ 142.794545][ T1349] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 142.794799][ T1349] ___sys_sendmsg+0xee/0x170 [ 142.794940][ T1349] ? __pfx____sys_sendmsg+0x10/0x10 [ 142.795075][ T1349] ? __lock_acquire+0xb3f/0x1580 [ 142.795208][ T1349] ? usage_skip+0x102/0x190 [ 142.795423][ T1349] ? reacquire_held_locks+0x22f/0x4f0 [ 142.795554][ T1349] ? do_user_addr_fault+0x8fd/0xe30 [ 142.795693][ T1349] ? fdget+0x52/0x1e0 [ 142.795799][ T1349] __sys_sendmsg+0xcd/0x170 [ 142.795960][ T1349] ? __pfx___sys_sendmsg+0x10/0x10 [ 142.796171][ T1349] ? __pfx___up_read+0x10/0x10 [ 142.796311][ T1349] do_syscall_64+0xc1/0x1d0 [ 142.796447][ T1349] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 142.796611][ T1349] RIP: 0033:0x7fd0928d57b7 [ 142.796844][ T1349] 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 [ 142.797502][ T1349] RSP: 002b:00007ffe46a4b918 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 142.797704][ T1349] RAX: ffffffffffffffda RBX: 00007ffe46a4c050 RCX: 00007fd0928d57b7 [ 142.797909][ T1349] RDX: 0000000000000000 RSI: 00007ffe46a4b980 RDI: 0000000000000005 [ 142.798188][ T1349] RBP: 0000000000000000 R08: 000000000000003c R09: 0000000000403418 [ 142.798394][ T1349] R10: 00007fd09278e708 R11: 0000000000000246 R12: 00007ffe46a4c078 [ 142.798608][ T1349] R13: 000000006729bd85 R14: 0000000000496600 R15: 0000000000000000 [ 142.798887][ T1349] [ 443.172818][ T2235] netdevsim: Exceeded number of supported nexthops [ 445.863479][ T2282] netdevsim: Failed to replace nexthop bucket [ 445.863775][ T2282] netdevsim: Failed to replace nexthop bucket [ 448.717465][ T2337] Failed to register nexthop notifier