Warning: Permanently added '10.128.0.66' (ED25519) to the list of known hosts. executing program [ 51.187498][ T3487] [ 51.189847][ T3487] ===================================================== [ 51.196765][ T3487] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 51.204204][ T3487] 5.15.126-syzkaller #0 Not tainted [ 51.209382][ T3487] ----------------------------------------------------- [ 51.216294][ T3487] syz-executor273/3487 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 51.224349][ T3487] ffffffff8c9dfba0 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook+0x22/0xc0 [ 51.233313][ T3487] [ 51.233313][ T3487] and this task is already holding: [ 51.240660][ T3487] ffffffff8da20808 (noop_qdisc.q.lock){+.-.}-{2:2}, at: netem_change+0x257/0x20c0 [ 51.249868][ T3487] which would create a new lock dependency: [ 51.255739][ T3487] (noop_qdisc.q.lock){+.-.}-{2:2} -> (fs_reclaim){+.+.}-{0:0} [ 51.263297][ T3487] [ 51.263297][ T3487] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 51.272728][ T3487] (noop_qdisc.q.lock){+.-.}-{2:2} [ 51.272746][ T3487] [ 51.272746][ T3487] ... which became SOFTIRQ-irq-safe at: [ 51.285530][ T3487] lock_acquire+0x1db/0x4f0 [ 51.290115][ T3487] _raw_spin_lock+0x2a/0x40 [ 51.294694][ T3487] net_tx_action+0x6c5/0x8e0 [ 51.299446][ T3487] __do_softirq+0x3b3/0x93a [ 51.304044][ T3487] do_softirq+0x162/0x240 [ 51.308460][ T3487] __local_bh_enable_ip+0x1b1/0x1f0 [ 51.313753][ T3487] dev_deactivate_many+0x524/0xbf0 [ 51.318947][ T3487] dev_deactivate+0x177/0x270 [ 51.323699][ T3487] linkwatch_do_dev+0x104/0x160 [ 51.328625][ T3487] __linkwatch_run_queue+0x4ca/0x7f0 [ 51.333984][ T3487] linkwatch_event+0x48/0x50 [ 51.338645][ T3487] process_one_work+0x8a1/0x10c0 [ 51.343656][ T3487] worker_thread+0xaca/0x1280 [ 51.348492][ T3487] kthread+0x3f6/0x4f0 [ 51.352656][ T3487] ret_from_fork+0x1f/0x30 [ 51.357149][ T3487] [ 51.357149][ T3487] to a SOFTIRQ-irq-unsafe lock: [ 51.364148][ T3487] (fs_reclaim){+.+.}-{0:0} [ 51.364169][ T3487] [ 51.364169][ T3487] ... which became SOFTIRQ-irq-unsafe at: [ 51.376629][ T3487] ... [ 51.376635][ T3487] lock_acquire+0x1db/0x4f0 [ 51.383924][ T3487] fs_reclaim_acquire+0x83/0x120 [ 51.388941][ T3487] slab_pre_alloc_hook+0x22/0xc0 [ 51.393953][ T3487] kmem_cache_alloc_trace+0x49/0x290 [ 51.399312][ T3487] wq_numa_init+0x122/0x49f [ 51.403892][ T3487] workqueue_init+0x18/0x5e1 [ 51.408553][ T3487] kernel_init_freeable+0x40a/0x5c5 [ 51.413824][ T3487] kernel_init+0x19/0x290 [ 51.418235][ T3487] ret_from_fork+0x1f/0x30 [ 51.422739][ T3487] [ 51.422739][ T3487] other info that might help us debug this: [ 51.422739][ T3487] [ 51.433065][ T3487] Possible interrupt unsafe locking scenario: [ 51.433065][ T3487] [ 51.441387][ T3487] CPU0 CPU1 [ 51.446742][ T3487] ---- ---- [ 51.452102][ T3487] lock(fs_reclaim); [ 51.456089][ T3487] local_irq_disable(); [ 51.462897][ T3487] lock(noop_qdisc.q.lock); [ 51.470010][ T3487] lock(fs_reclaim); [ 51.476503][ T3487] [ 51.479945][ T3487] lock(noop_qdisc.q.lock); [ 51.484708][ T3487] [ 51.484708][ T3487] *** DEADLOCK *** [ 51.484708][ T3487] [ 51.492854][ T3487] 2 locks held by syz-executor273/3487: [ 51.498401][ T3487] #0: ffffffff8d9e1148 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 [ 51.507796][ T3487] #1: ffffffff8da20808 (noop_qdisc.q.lock){+.-.}-{2:2}, at: netem_change+0x257/0x20c0 [ 51.518919][ T3487] [ 51.518919][ T3487] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 51.529310][ T3487] -> (noop_qdisc.q.lock){+.-.}-{2:2} { [ 51.534774][ T3487] HARDIRQ-ON-W at: [ 51.538742][ T3487] lock_acquire+0x1db/0x4f0 [ 51.544889][ T3487] _raw_spin_lock+0x2a/0x40 [ 51.551041][ T3487] __dev_queue_xmit+0xad6/0x3230 [ 51.557633][ T3487] tx+0x64/0x100 [ 51.562835][ T3487] kthread+0x234/0x440 [ 51.568568][ T3487] kthread+0x3f6/0x4f0 [ 51.574279][ T3487] ret_from_fork+0x1f/0x30 [ 51.580340][ T3487] IN-SOFTIRQ-W at: [ 51.584318][ T3487] lock_acquire+0x1db/0x4f0 [ 51.590549][ T3487] _raw_spin_lock+0x2a/0x40 [ 51.596698][ T3487] net_tx_action+0x6c5/0x8e0 [ 51.602928][ T3487] __do_softirq+0x3b3/0x93a [ 51.609074][ T3487] do_softirq+0x162/0x240 [ 51.615050][ T3487] __local_bh_enable_ip+0x1b1/0x1f0 [ 51.621901][ T3487] dev_deactivate_many+0x524/0xbf0 [ 51.628744][ T3487] dev_deactivate+0x177/0x270 [ 51.635065][ T3487] linkwatch_do_dev+0x104/0x160 [ 51.641555][ T3487] __linkwatch_run_queue+0x4ca/0x7f0 [ 51.648566][ T3487] linkwatch_event+0x48/0x50 [ 51.654795][ T3487] process_one_work+0x8a1/0x10c0 [ 51.662374][ T3487] worker_thread+0xaca/0x1280 [ 51.668720][ T3487] kthread+0x3f6/0x4f0 [ 51.674508][ T3487] ret_from_fork+0x1f/0x30 [ 51.680571][ T3487] INITIAL USE at: [ 51.684457][ T3487] lock_acquire+0x1db/0x4f0 [ 51.690526][ T3487] _raw_spin_lock+0x2a/0x40 [ 51.696669][ T3487] __dev_queue_xmit+0xad6/0x3230 [ 51.703334][ T3487] tx+0x64/0x100 [ 51.708435][ T3487] kthread+0x234/0x440 [ 51.714057][ T3487] kthread+0x3f6/0x4f0 [ 51.719763][ T3487] ret_from_fork+0x1f/0x30 [ 51.725733][ T3487] } [ 51.728216][ T3487] ... key at: [] noop_qdisc+0x108/0x320 [ 51.735850][ T3487] [ 51.735850][ T3487] the dependencies between the lock to be acquired [ 51.735857][ T3487] and SOFTIRQ-irq-unsafe lock: [ 51.749349][ T3487] -> (fs_reclaim){+.+.}-{0:0} { [ 51.754201][ T3487] HARDIRQ-ON-W at: [ 51.758167][ T3487] lock_acquire+0x1db/0x4f0 [ 51.764412][ T3487] fs_reclaim_acquire+0x83/0x120 [ 51.770990][ T3487] slab_pre_alloc_hook+0x22/0xc0 [ 51.777569][ T3487] kmem_cache_alloc_trace+0x49/0x290 [ 51.784664][ T3487] wq_numa_init+0x122/0x49f [ 51.791127][ T3487] workqueue_init+0x18/0x5e1 [ 51.797376][ T3487] kernel_init_freeable+0x40a/0x5c5 [ 51.804331][ T3487] kernel_init+0x19/0x290 [ 51.810338][ T3487] ret_from_fork+0x1f/0x30 [ 51.816407][ T3487] SOFTIRQ-ON-W at: [ 51.820380][ T3487] lock_acquire+0x1db/0x4f0 [ 51.826527][ T3487] fs_reclaim_acquire+0x83/0x120 [ 51.833108][ T3487] slab_pre_alloc_hook+0x22/0xc0 [ 51.839684][ T3487] kmem_cache_alloc_trace+0x49/0x290 [ 51.846608][ T3487] wq_numa_init+0x122/0x49f [ 51.852753][ T3487] workqueue_init+0x18/0x5e1 [ 51.859073][ T3487] kernel_init_freeable+0x40a/0x5c5 [ 51.865913][ T3487] kernel_init+0x19/0x290 [ 51.871881][ T3487] ret_from_fork+0x1f/0x30 [ 51.877935][ T3487] INITIAL USE at: [ 51.881837][ T3487] lock_acquire+0x1db/0x4f0 [ 51.887895][ T3487] fs_reclaim_acquire+0x83/0x120 [ 51.894389][ T3487] slab_pre_alloc_hook+0x22/0xc0 [ 51.900977][ T3487] kmem_cache_alloc_trace+0x49/0x290 [ 51.907815][ T3487] wq_numa_init+0x122/0x49f [ 51.913873][ T3487] workqueue_init+0x18/0x5e1 [ 51.920203][ T3487] kernel_init_freeable+0x40a/0x5c5 [ 51.926953][ T3487] kernel_init+0x19/0x290 [ 51.932838][ T3487] ret_from_fork+0x1f/0x30 [ 51.938822][ T3487] } [ 51.941307][ T3487] ... key at: [] __fs_reclaim_map+0x0/0x160 [ 51.949274][ T3487] ... acquired at: [ 51.953065][ T3487] lock_acquire+0x1db/0x4f0 [ 51.957733][ T3487] fs_reclaim_acquire+0x83/0x120 [ 51.962854][ T3487] slab_pre_alloc_hook+0x22/0xc0 [ 51.967965][ T3487] __kmalloc_node+0x71/0x390 [ 51.972722][ T3487] kvmalloc_node+0x80/0x140 [ 51.977475][ T3487] get_dist_table+0x83/0x2c0 [ 51.982230][ T3487] netem_change+0xa05/0x20c0 [ 51.986984][ T3487] netem_init+0x58/0xb0 [ 51.991300][ T3487] qdisc_create+0x8ae/0x1390 [ 51.996054][ T3487] tc_modify_qdisc+0xac5/0x1710 [ 52.001069][ T3487] rtnetlink_rcv_msg+0x993/0xee0 [ 52.006169][ T3487] netlink_rcv_skb+0x1cf/0x410 [ 52.011096][ T3487] netlink_unicast+0x7b6/0x980 [ 52.016044][ T3487] netlink_sendmsg+0xa30/0xd60 [ 52.020975][ T3487] ____sys_sendmsg+0x59e/0x8f0 [ 52.025989][ T3487] ___sys_sendmsg+0x252/0x2e0 [ 52.030827][ T3487] __se_sys_sendmsg+0x19a/0x260 [ 52.035837][ T3487] do_syscall_64+0x3d/0xb0 [ 52.040417][ T3487] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 52.046495][ T3487] [ 52.048812][ T3487] [ 52.048812][ T3487] stack backtrace: [ 52.054707][ T3487] CPU: 0 PID: 3487 Comm: syz-executor273 Not tainted 5.15.126-syzkaller #0 [ 52.063376][ T3487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 [ 52.073431][ T3487] Call Trace: [ 52.076795][ T3487] [ 52.079731][ T3487] dump_stack_lvl+0x1e3/0x2cb [ 52.084406][ T3487] ? io_uring_drop_tctx_refs+0x19d/0x19d [ 52.090136][ T3487] ? panic+0x84d/0x84d [ 52.094199][ T3487] ? print_shortest_lock_dependencies+0xee/0x150 [ 52.100522][ T3487] validate_chain+0x4cfe/0x58b0 [ 52.105373][ T3487] ? reacquire_held_locks+0x660/0x660 [ 52.110736][ T3487] ? validate_chain+0x112/0x58b0 [ 52.115668][ T3487] ? reacquire_held_locks+0x660/0x660 [ 52.121033][ T3487] ? mark_lock+0x98/0x340 [ 52.125357][ T3487] __lock_acquire+0x1295/0x1ff0 [ 52.130204][ T3487] lock_acquire+0x1db/0x4f0 [ 52.134700][ T3487] ? slab_pre_alloc_hook+0x22/0xc0 [ 52.139805][ T3487] ? read_lock_is_recursive+0x10/0x10 [ 52.145177][ T3487] fs_reclaim_acquire+0x83/0x120 [ 52.150112][ T3487] ? slab_pre_alloc_hook+0x22/0xc0 [ 52.155213][ T3487] slab_pre_alloc_hook+0x22/0xc0 [ 52.160231][ T3487] __kmalloc_node+0x71/0x390 [ 52.164813][ T3487] ? kvmalloc_node+0x80/0x140 [ 52.169481][ T3487] ? __bpf_trace_softirq+0x10/0x10 [ 52.174580][ T3487] kvmalloc_node+0x80/0x140 [ 52.179076][ T3487] get_dist_table+0x83/0x2c0 [ 52.183660][ T3487] netem_change+0xa05/0x20c0 [ 52.188244][ T3487] ? netem_destroy+0xb0/0xb0 [ 52.192824][ T3487] ? debug_object_init+0x10/0x10 [ 52.197773][ T3487] ? memset+0x1f/0x40 [ 52.201743][ T3487] ? lockdep_init_map_type+0x9d/0x8d0 [ 52.207111][ T3487] ? memset+0x1f/0x40 [ 52.211080][ T3487] ? __hrtimer_init+0x181/0x260 [ 52.215923][ T3487] netem_init+0x58/0xb0 [ 52.220192][ T3487] ? qdisc_peek_dequeued+0x220/0x220 [ 52.225466][ T3487] qdisc_create+0x8ae/0x1390 [ 52.230052][ T3487] ? qdisc_notify+0x380/0x380 [ 52.234743][ T3487] ? apparmor_capable+0x12e/0x190 [ 52.239763][ T3487] tc_modify_qdisc+0xac5/0x1710 [ 52.244610][ T3487] ? rcu_lock_release+0x20/0x20 [ 52.249459][ T3487] ? rcu_lock_release+0x20/0x20 [ 52.254306][ T3487] rtnetlink_rcv_msg+0x993/0xee0 [ 52.259234][ T3487] ? reacquire_held_locks+0x660/0x660 [ 52.264595][ T3487] ? rtnetlink_bind+0x80/0x80 [ 52.269272][ T3487] ? is_bpf_text_address+0x24f/0x260 [ 52.274636][ T3487] ? stack_trace_save+0x1c0/0x1c0 [ 52.279655][ T3487] ? __kernel_text_address+0x94/0x100 [ 52.285019][ T3487] ? unwind_get_return_address+0x49/0x80 [ 52.290731][ T3487] ? arch_stack_walk+0xf3/0x140 [ 52.295573][ T3487] ? mark_lock+0x98/0x340 [ 52.299893][ T3487] ? mark_lock+0x98/0x340 [ 52.304214][ T3487] ? __lock_acquire+0x1295/0x1ff0 [ 52.309268][ T3487] netlink_rcv_skb+0x1cf/0x410 [ 52.314030][ T3487] ? rtnetlink_bind+0x80/0x80 [ 52.318712][ T3487] ? netlink_ack+0xb10/0xb10 [ 52.323298][ T3487] netlink_unicast+0x7b6/0x980 [ 52.328073][ T3487] ? netlink_detachskb+0x90/0x90 [ 52.333003][ T3487] ? 0xffffffff81000000 [ 52.337206][ T3487] ? __check_object_size+0x300/0x410 [ 52.342481][ T3487] ? bpf_lsm_netlink_send+0x5/0x10 [ 52.347696][ T3487] netlink_sendmsg+0xa30/0xd60 [ 52.352460][ T3487] ? netlink_getsockopt+0x5b0/0x5b0 [ 52.357651][ T3487] ? aa_sock_msg_perm+0x91/0x150 [ 52.362580][ T3487] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 52.367854][ T3487] ? security_socket_sendmsg+0x7d/0xa0 [ 52.373308][ T3487] ? netlink_getsockopt+0x5b0/0x5b0 [ 52.378502][ T3487] ____sys_sendmsg+0x59e/0x8f0 [ 52.383257][ T3487] ? iovec_from_user+0x300/0x390 [ 52.388186][ T3487] ? __sys_sendmsg_sock+0x30/0x30 [ 52.393203][ T3487] ___sys_sendmsg+0x252/0x2e0 [ 52.397900][ T3487] ? __sys_sendmsg+0x260/0x260 [ 52.402659][ T3487] ? __lock_acquire+0x1295/0x1ff0 [ 52.407686][ T3487] ? read_lock_is_recursive+0x10/0x10 [ 52.413154][ T3487] ? __context_tracking_exit+0x4c/0x80 [ 52.418734][ T3487] ? __fdget+0x158/0x220 [ 52.422982][ T3487] __se_sys_sendmsg+0x19a/0x260 [ 52.427831][ T3487] ? __x64_sys_sendmsg+0x80/0x80 [ 52.432884][ T3487] ? syscall_enter_from_user_mode+0x2e/0x230 [ 52.438893][ T3487] ? lockdep_hardirqs_on+0x94/0x130 [ 52.444268][ T3487] ? syscall_enter_from_user_mode+0x2e/0x230 [ 52.450257][ T3487] do_syscall_64+0x3d/0xb0 [ 52.454812][ T3487] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 52.460714][ T3487] RIP: 0033:0x7f9ce3f57879 [ 52.465127][ T3487] Code: 48 83 c4 28 c3 e8 27 18 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 [ 52.489466][ T3487] RSP: 002b:00007ffddbec1718 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 52.498142][ T3487] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9ce3f57879 [ 52.506110][ T3487] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003 [ 52.514071][ T3487] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffddbec1790 [ 52.522035][ T3487] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 52.529995][ T3487] R13: 00007ffddbec1918 R14: 0000000000000001 R15: 0000000000000001 [ 52.537964][ T3487] [ 52.541047][ T3487] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:209 [ 52.550534][ T3487] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3487, name: syz-executor273 [ 52.560035][ T3487] INFO: lockdep is turned off. [ 52.564819][ T3487] Preemption disabled at: [ 52.564827][ T3487] [<0000000000000000>] 0x0 [ 52.573566][ T3487] CPU: 0 PID: 3487 Comm: syz-executor273 Not tainted 5.15.126-syzkaller #0 [ 52.582244][ T3487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 [ 52.592423][ T3487] Call Trace: [ 52.595702][ T3487] [ 52.598641][ T3487] dump_stack_lvl+0x1e3/0x2cb [ 52.603323][ T3487] ? io_uring_drop_tctx_refs+0x19d/0x19d [ 52.608973][ T3487] ? panic+0x84d/0x84d [ 52.613036][ T3487] ? rcu_is_watching+0x11/0xa0 [ 52.617804][ T3487] ? rcu_is_watching+0x11/0xa0 [ 52.622569][ T3487] ___might_sleep+0x547/0x6a0 [ 52.627248][ T3487] ? __might_sleep+0xc0/0xc0 [ 52.631844][ T3487] slab_pre_alloc_hook+0x44/0xc0 [ 52.637073][ T3487] __kmalloc_node+0x71/0x390 [ 52.641664][ T3487] ? kvmalloc_node+0x80/0x140 [ 52.646334][ T3487] ? __bpf_trace_softirq+0x10/0x10 [ 52.651441][ T3487] kvmalloc_node+0x80/0x140 [ 52.656029][ T3487] get_dist_table+0x83/0x2c0 [ 52.660617][ T3487] netem_change+0xa05/0x20c0 [ 52.665204][ T3487] ? netem_destroy+0xb0/0xb0 [ 52.669784][ T3487] ? debug_object_init+0x10/0x10 [ 52.674834][ T3487] ? memset+0x1f/0x40 [ 52.678808][ T3487] ? lockdep_init_map_type+0x9d/0x8d0 [ 52.684483][ T3487] ? memset+0x1f/0x40 [ 52.688457][ T3487] ? __hrtimer_init+0x181/0x260 [ 52.693304][ T3487] netem_init+0x58/0xb0 [ 52.697449][ T3487] ? qdisc_peek_dequeued+0x220/0x220 [ 52.702744][ T3487] qdisc_create+0x8ae/0x1390 [ 52.707327][ T3487] ? qdisc_notify+0x380/0x380 [ 52.711989][ T3487] ? apparmor_capable+0x12e/0x190 [ 52.717006][ T3487] tc_modify_qdisc+0xac5/0x1710 [ 52.721945][ T3487] ? rcu_lock_release+0x20/0x20 [ 52.726800][ T3487] ? rcu_lock_release+0x20/0x20 [ 52.731646][ T3487] rtnetlink_rcv_msg+0x993/0xee0 [ 52.736575][ T3487] ? reacquire_held_locks+0x660/0x660 [ 52.741938][ T3487] ? rtnetlink_bind+0x80/0x80 [ 52.746603][ T3487] ? is_bpf_text_address+0x24f/0x260 [ 52.751879][ T3487] ? stack_trace_save+0x1c0/0x1c0 [ 52.756895][ T3487] ? __kernel_text_address+0x94/0x100 [ 52.762258][ T3487] ? unwind_get_return_address+0x49/0x80 [ 52.767968][ T3487] ? arch_stack_walk+0xf3/0x140 [ 52.772809][ T3487] ? mark_lock+0x98/0x340 [ 52.777139][ T3487] ? mark_lock+0x98/0x340 [ 52.781459][ T3487] ? __lock_acquire+0x1295/0x1ff0 [ 52.787026][ T3487] netlink_rcv_skb+0x1cf/0x410 [ 52.791783][ T3487] ? rtnetlink_bind+0x80/0x80 [ 52.796456][ T3487] ? netlink_ack+0xb10/0xb10 [ 52.801311][ T3487] netlink_unicast+0x7b6/0x980 [ 52.806109][ T3487] ? netlink_detachskb+0x90/0x90 [ 52.811155][ T3487] ? 0xffffffff81000000 [ 52.815299][ T3487] ? __check_object_size+0x300/0x410 [ 52.820602][ T3487] ? bpf_lsm_netlink_send+0x5/0x10 [ 52.825705][ T3487] netlink_sendmsg+0xa30/0xd60 [ 52.830469][ T3487] ? netlink_getsockopt+0x5b0/0x5b0 [ 52.835666][ T3487] ? aa_sock_msg_perm+0x91/0x150 [ 52.840600][ T3487] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 52.845909][ T3487] ? security_socket_sendmsg+0x7d/0xa0 [ 52.851374][ T3487] ? netlink_getsockopt+0x5b0/0x5b0 [ 52.856565][ T3487] ____sys_sendmsg+0x59e/0x8f0 [ 52.861340][ T3487] ? iovec_from_user+0x300/0x390 [ 52.866269][ T3487] ? __sys_sendmsg_sock+0x30/0x30 [ 52.871290][ T3487] ___sys_sendmsg+0x252/0x2e0 [ 52.875960][ T3487] ? __sys_sendmsg+0x260/0x260 [ 52.880716][ T3487] ? __lock_acquire+0x1295/0x1ff0 [ 52.885742][ T3487] ? read_lock_is_recursive+0x10/0x10 [ 52.891111][ T3487] ? __context_tracking_exit+0x4c/0x80 [ 52.896564][ T3487] ? __fdget+0x158/0x220 [ 52.900799][ T3487] __se_sys_sendmsg+0x19a/0x260 [ 52.905651][ T3487] ? __x64_sys_sendmsg+0x80/0x80 [ 52.910581][ T3487] ? syscall_enter_from_user_mode+0x2e/0x230 [ 52.916561][ T3487] ? lockdep_hardirqs_on+0x94/0x130 [ 52.921753][ T3487] ? syscall_enter_from_user_mode+0x2e/0x230 [ 52.927725][ T3487] do_syscall_64+0x3d/0xb0 [ 52.932132][ T3487] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 52.938049][ T3487] RIP: 0033:0x7f9ce3f57879 [ 52.942457][ T3487] Code: 48 83 c4 28 c3 e8 27 18 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 [ 52.962050][ T3487] RSP: 002b:00007ffddbec1718 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 52.970562][ T3487] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9ce3f57879 [ 52.978708][ T3487] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003 [ 52.986769][ T3487] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffddbec1790 [ 52.994754][ T3487] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 53.002732][ T3487] R13: 00007ffddbec1918 R14: 0000000000000001 R15: 0000000000000001 [ 53.010717][ T3487]