Warning: Permanently added '10.128.1.190' (ED25519) to the list of known hosts. executing program [ 43.061816][ T3965] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:209 [ 43.064426][ T3965] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3965, name: syz-executor289 [ 43.066787][ T3965] 2 locks held by syz-executor289/3965: [ 43.068263][ T3965] #0: ffff8000169e74a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa2c/0xdac [ 43.070803][ T3965] #1: ffff0000da54f108 (&sch->q.lock){+...}-{2:2}, at: netem_change+0x22c/0x1a90 [ 43.073208][ T3965] Preemption disabled at: [ 43.073220][ T3965] [] netem_change+0x22c/0x1a90 [ 43.075871][ T3965] CPU: 0 PID: 3965 Comm: syz-executor289 Not tainted 5.15.126-syzkaller-00092-g24c4de4069cb #0 [ 43.078461][ T3965] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 [ 43.080982][ T3965] Call trace: [ 43.081778][ T3965] dump_backtrace+0x0/0x530 [ 43.082933][ T3965] show_stack+0x2c/0x3c [ 43.084018][ T3965] dump_stack_lvl+0x108/0x170 [ 43.085243][ T3965] dump_stack+0x1c/0x58 [ 43.086300][ T3965] ___might_sleep+0x380/0x4dc [ 43.087515][ T3965] __might_sleep+0x98/0xf0 [ 43.088651][ T3965] slab_pre_alloc_hook+0x58/0xe8 [ 43.089942][ T3965] __kmalloc_node+0xbc/0x5b8 [ 43.091122][ T3965] kvmalloc_node+0x88/0x204 [ 43.092286][ T3965] get_dist_table+0x9c/0x2a4 [ 43.093455][ T3965] netem_change+0x7cc/0x1a90 [ 43.094662][ T3965] netem_init+0x54/0xb8 [ 43.095712][ T3965] qdisc_create+0x6fc/0xf44 [ 43.096874][ T3965] tc_modify_qdisc+0x8dc/0x1344 [ 43.098144][ T3965] rtnetlink_rcv_msg+0xa74/0xdac [ 43.099418][ T3965] netlink_rcv_skb+0x20c/0x3b8 [ 43.100737][ T3965] rtnetlink_rcv+0x28/0x38 [ 43.101853][ T3965] netlink_unicast+0x664/0x938 [ 43.103106][ T3965] netlink_sendmsg+0x844/0xb38 [ 43.104384][ T3965] ____sys_sendmsg+0x584/0x870 [ 43.105645][ T3965] ___sys_sendmsg+0x214/0x294 [ 43.106857][ T3965] __arm64_sys_sendmsg+0x1ac/0x25c [ 43.108104][ T3965] invoke_syscall+0x98/0x2b8 [ 43.109310][ T3965] el0_svc_common+0x138/0x258 [ 43.110561][ T3965] do_el0_svc+0x58/0x14c [ 43.111701][ T3965] el0_svc+0x7c/0x1f0 [ 43.112762][ T3965] el0t_64_sync_handler+0x84/0xe4 [ 43.114077][ T3965] el0t_64_sync+0x1a0/0x1a4 [ 43.115391][ T3965] [ 43.115946][ T3965] ============================================ [ 43.117435][ T3965] WARNING: possible recursive locking detected [ 43.118661][ T3965] 5.15.126-syzkaller-00092-g24c4de4069cb #0 Tainted: G W [ 43.120835][ T3965] -------------------------------------------- [ 43.122592][ T3965] syz-executor289/3965 is trying to acquire lock: [ 43.124220][ T3965] ffff0000da54f108 (&sch->q.lock){+...}-{2:2}, at: get_dist_table+0x1f0/0x2a4 [ 43.126580][ T3965] [ 43.126580][ T3965] but task is already holding lock: [ 43.128482][ T3965] ffff0000da54f108 (&sch->q.lock){+...}-{2:2}, at: netem_change+0x22c/0x1a90 [ 43.130766][ T3965] [ 43.130766][ T3965] other info that might help us debug this: [ 43.132842][ T3965] Possible unsafe locking scenario: [ 43.132842][ T3965] [ 43.134799][ T3965] CPU0 [ 43.135641][ T3965] ---- [ 43.136517][ T3965] lock(&sch->q.lock); [ 43.137584][ T3965] lock(&sch->q.lock); [ 43.138651][ T3965] [ 43.138651][ T3965] *** DEADLOCK *** [ 43.138651][ T3965] [ 43.140733][ T3965] May be due to missing lock nesting notation [ 43.140733][ T3965] [ 43.142852][ T3965] 2 locks held by syz-executor289/3965: [ 43.144268][ T3965] #0: ffff8000169e74a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa2c/0xdac [ 43.146719][ T3965] #1: ffff0000da54f108 (&sch->q.lock){+...}-{2:2}, at: netem_change+0x22c/0x1a90 [ 43.149168][ T3965] [ 43.149168][ T3965] stack backtrace: [ 43.150680][ T3965] CPU: 0 PID: 3965 Comm: syz-executor289 Tainted: G W 5.15.126-syzkaller-00092-g24c4de4069cb #0 [ 43.153721][ T3965] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 [ 43.156285][ T3965] Call trace: [ 43.157115][ T3965] dump_backtrace+0x0/0x530 [ 43.158287][ T3965] show_stack+0x2c/0x3c [ 43.159351][ T3965] dump_stack_lvl+0x108/0x170 [ 43.160583][ T3965] dump_stack+0x1c/0x58 [ 43.161645][ T3965] __lock_acquire+0x62b4/0x7620 [ 43.162928][ T3965] lock_acquire+0x240/0x77c [ 43.164084][ T3965] _raw_spin_lock_bh+0x124/0x1c4 [ 43.165405][ T3965] get_dist_table+0x1f0/0x2a4 [ 43.166625][ T3965] netem_change+0x7cc/0x1a90 [ 43.167808][ T3965] netem_init+0x54/0xb8 [ 43.168874][ T3965] qdisc_create+0x6fc/0xf44 [ 43.170070][ T3965] tc_modify_qdisc+0x8dc/0x1344 [ 43.171381][ T3965] rtnetlink_rcv_msg+0xa74/0xdac [ 43.172655][ T3965] netlink_rcv_skb+0x20c/0x3b8 [ 43.173905][ T3965] rtnetlink_rcv+0x28/0x38 [ 43.175032][ T3965] netlink_unicast+0x664/0x938 [ 43.176305][ T3965] netlink_sendmsg+0x844/0xb38 [ 43.177506][ T3965] ____sys_sendmsg+0x584/0x870 [ 43.178741][ T3965] ___sys_sendmsg+0x214/0x294 [ 43.179978][ T3965] __arm64_sys_sendmsg+0x1ac/0x25c [ 43.181307][ T3965] invoke_syscall+0x98/0x2b8 [ 43.182481][ T3965] el0_svc_common+0x138/0x258 [ 43.183688][ T3965] do_el0_svc+0x58/0x14c [ 43.184798][ T3965] el0_svc+0x7c/0x1f0 [ 43.185804][ T3965] el0t_64_sync_handler+0x84/0xe4 [ 43.187104][ T3965] el0t_64_sync+0x1a0/0x1a4