netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. ===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 6.1.38-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor.2/10827 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: ffffffff8d0023a0 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:271 [inline] ffffffff8d0023a0 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook+0x2a/0x2a0 mm/slab.h:710 and this task is already holding: ffff88804bb71108 (&sch->q.lock){+.-.}-{2:2}, at: netem_change+0x17e/0x1ea0 net/sched/sch_netem.c:969 which would create a new lock dependency: (&sch->q.lock){+.-.}-{2:2} -> (fs_reclaim){+.+.}-{0:0} but this new dependency connects a SOFTIRQ-irq-safe lock: (&sch->q.lock){+.-.}-{2:2} ... which became SOFTIRQ-irq-safe at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] __dev_xmit_skb net/core/dev.c:3854 [inline] __dev_queue_xmit+0xd50/0x3c90 net/core/dev.c:4227 dev_queue_xmit include/linux/netdevice.h:3021 [inline] neigh_hh_output include/net/neighbour.h:528 [inline] neigh_output include/net/neighbour.h:542 [inline] ip_finish_output2+0xd7f/0x1280 net/ipv4/ip_output.c:228 iptunnel_xmit+0x50c/0x930 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x230/0x350 net/ipv4/udp_tunnel_core.c:172 geneve_xmit_skb drivers/net/geneve.c:996 [inline] geneve_xmit+0x1918/0x3a40 drivers/net/geneve.c:1108 __netdev_start_xmit include/linux/netdevice.h:4853 [inline] netdev_start_xmit include/linux/netdevice.h:4867 [inline] xmit_one net/core/dev.c:3595 [inline] dev_hard_start_xmit+0x261/0x8c0 net/core/dev.c:3611 __dev_queue_xmit+0x1b97/0x3c90 net/core/dev.c:4261 neigh_output include/net/neighbour.h:544 [inline] ip6_finish_output2+0xf9f/0x15b0 net/ipv6/ip6_output.c:134 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x6ac/0xa80 net/ipv6/ip6_output.c:206 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xb04/0x1380 net/ipv6/ndisc.c:508 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3936 call_timer_fn+0x19e/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers+0x67c/0x890 kernel/time/timer.c:1790 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803 __do_softirq+0x2e9/0xa4c kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 kasan_check_range+0x8/0x290 mm/kasan/generic.c:188 instrument_atomic_read include/linux/instrumented.h:72 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] cpumask_test_cpu include/linux/cpumask.h:444 [inline] cpu_online include/linux/cpumask.h:1030 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0xeb/0x5a0 kernel/locking/lockdep.c:5640 rcu_lock_acquire+0x20/0x30 include/linux/rcupdate.h:306 rcu_read_lock include/linux/rcupdate.h:747 [inline] folio_memcg_lock+0x83/0x360 mm/memcontrol.c:2098 page_remove_rmap+0x2e/0xed0 mm/rmap.c:1426 zap_pte_range mm/memory.c:1443 [inline] zap_pmd_range mm/memory.c:1564 [inline] zap_pud_range mm/memory.c:1593 [inline] zap_p4d_range mm/memory.c:1614 [inline] unmap_page_range+0x1217/0x2740 mm/memory.c:1635 unmap_vmas+0x3c4/0x560 mm/memory.c:1720 exit_mmap+0x252/0x9f0 mm/mmap.c:3213 __mmput+0x115/0x3c0 kernel/fork.c:1191 exit_mm+0x226/0x300 kernel/exit.c:563 do_exit+0x67e/0x2300 kernel/exit.c:856 do_group_exit+0x202/0x2b0 kernel/exit.c:1019 get_signal+0x16f7/0x17d0 kernel/signal.c:2858 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd to a SOFTIRQ-irq-unsafe lock: (fs_reclaim){+.+.}-{0:0} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __fs_reclaim_acquire mm/page_alloc.c:4683 [inline] fs_reclaim_acquire+0x83/0x120 mm/page_alloc.c:4697 might_alloc include/linux/sched/mm.h:271 [inline] slab_pre_alloc_hook+0x2a/0x2a0 mm/slab.h:710 slab_alloc_node mm/slub.c:3318 [inline] __kmem_cache_alloc_node+0x47/0x260 mm/slub.c:3437 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1045 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] alloc_workqueue_attrs+0x46/0xc0 kernel/workqueue.c:3394 wq_numa_init+0x122/0x4b0 kernel/workqueue.c:5959 workqueue_init+0x22/0x59d kernel/workqueue.c:6086 kernel_init_freeable+0x40a/0x61f init/main.c:1614 kernel_init+0x19/0x290 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(fs_reclaim); local_irq_disable(); lock(&sch->q.lock); lock(fs_reclaim); lock(&sch->q.lock); *** DEADLOCK *** 2 locks held by syz-executor.2/10827: #0: ffffffff8e096b28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffffffff8e096b28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x720/0xf00 net/core/rtnetlink.c:6094 #1: ffff88804bb71108 (&sch->q.lock){+.-.}-{2:2}, at: netem_change+0x17e/0x1ea0 net/sched/sch_netem.c:969 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&sch->q.lock){+.-.}-{2:2} { HARDIRQ-ON-W at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:355 [inline] dev_reset_queue+0x131/0x1a0 net/sched/sch_generic.c:1291 netdev_for_each_tx_queue include/linux/netdevice.h:2453 [inline] dev_deactivate_many+0x525/0xaf0 net/sched/sch_generic.c:1359 dev_deactivate+0x177/0x270 net/sched/sch_generic.c:1382 linkwatch_do_dev+0x104/0x160 net/core/link_watch.c:166 __linkwatch_run_queue+0x448/0x6b0 net/core/link_watch.c:221 linkwatch_event+0x48/0x50 net/core/link_watch.c:264 process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2289 worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436 kthread+0x26e/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 IN-SOFTIRQ-W at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] __dev_xmit_skb net/core/dev.c:3854 [inline] __dev_queue_xmit+0xd50/0x3c90 net/core/dev.c:4227 dev_queue_xmit include/linux/netdevice.h:3021 [inline] neigh_hh_output include/net/neighbour.h:528 [inline] neigh_output include/net/neighbour.h:542 [inline] ip_finish_output2+0xd7f/0x1280 net/ipv4/ip_output.c:228 iptunnel_xmit+0x50c/0x930 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x230/0x350 net/ipv4/udp_tunnel_core.c:172 geneve_xmit_skb drivers/net/geneve.c:996 [inline] geneve_xmit+0x1918/0x3a40 drivers/net/geneve.c:1108 __netdev_start_xmit include/linux/netdevice.h:4853 [inline] netdev_start_xmit include/linux/netdevice.h:4867 [inline] xmit_one net/core/dev.c:3595 [inline] dev_hard_start_xmit+0x261/0x8c0 net/core/dev.c:3611 __dev_queue_xmit+0x1b97/0x3c90 net/core/dev.c:4261 neigh_output include/net/neighbour.h:544 [inline] ip6_finish_output2+0xf9f/0x15b0 net/ipv6/ip6_output.c:134 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x6ac/0xa80 net/ipv6/ip6_output.c:206 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xb04/0x1380 net/ipv6/ndisc.c:508 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3936 call_timer_fn+0x19e/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers+0x67c/0x890 kernel/time/timer.c:1790 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803 __do_softirq+0x2e9/0xa4c kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 kasan_check_range+0x8/0x290 mm/kasan/generic.c:188 instrument_atomic_read include/linux/instrumented.h:72 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] cpumask_test_cpu include/linux/cpumask.h:444 [inline] cpu_online include/linux/cpumask.h:1030 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0xeb/0x5a0 kernel/locking/lockdep.c:5640 rcu_lock_acquire+0x20/0x30 include/linux/rcupdate.h:306 rcu_read_lock include/linux/rcupdate.h:747 [inline] folio_memcg_lock+0x83/0x360 mm/memcontrol.c:2098 page_remove_rmap+0x2e/0xed0 mm/rmap.c:1426 zap_pte_range mm/memory.c:1443 [inline] zap_pmd_range mm/memory.c:1564 [inline] zap_pud_range mm/memory.c:1593 [inline] zap_p4d_range mm/memory.c:1614 [inline] unmap_page_range+0x1217/0x2740 mm/memory.c:1635 unmap_vmas+0x3c4/0x560 mm/memory.c:1720 exit_mmap+0x252/0x9f0 mm/mmap.c:3213 __mmput+0x115/0x3c0 kernel/fork.c:1191 exit_mm+0x226/0x300 kernel/exit.c:563 do_exit+0x67e/0x2300 kernel/exit.c:856 do_group_exit+0x202/0x2b0 kernel/exit.c:1019 get_signal+0x16f7/0x17d0 kernel/signal.c:2858 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd INITIAL USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:355 [inline] dev_reset_queue+0x131/0x1a0 net/sched/sch_generic.c:1291 netdev_for_each_tx_queue include/linux/netdevice.h:2453 [inline] dev_deactivate_many+0x525/0xaf0 net/sched/sch_generic.c:1359 dev_deactivate+0x177/0x270 net/sched/sch_generic.c:1382 linkwatch_do_dev+0x104/0x160 net/core/link_watch.c:166 __linkwatch_run_queue+0x448/0x6b0 net/core/link_watch.c:221 linkwatch_event+0x48/0x50 net/core/link_watch.c:264 process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2289 worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436 kthread+0x26e/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 } ... key at: [] qdisc_alloc.__key+0x0/0x20 the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (fs_reclaim){+.+.}-{0:0} { HARDIRQ-ON-W at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __fs_reclaim_acquire mm/page_alloc.c:4683 [inline] fs_reclaim_acquire+0x83/0x120 mm/page_alloc.c:4697 might_alloc include/linux/sched/mm.h:271 [inline] slab_pre_alloc_hook+0x2a/0x2a0 mm/slab.h:710 slab_alloc_node mm/slub.c:3318 [inline] __kmem_cache_alloc_node+0x47/0x260 mm/slub.c:3437 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1045 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] alloc_workqueue_attrs+0x46/0xc0 kernel/workqueue.c:3394 wq_numa_init+0x122/0x4b0 kernel/workqueue.c:5959 workqueue_init+0x22/0x59d kernel/workqueue.c:6086 kernel_init_freeable+0x40a/0x61f init/main.c:1614 kernel_init+0x19/0x290 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 SOFTIRQ-ON-W at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __fs_reclaim_acquire mm/page_alloc.c:4683 [inline] fs_reclaim_acquire+0x83/0x120 mm/page_alloc.c:4697 might_alloc include/linux/sched/mm.h:271 [inline] slab_pre_alloc_hook+0x2a/0x2a0 mm/slab.h:710 slab_alloc_node mm/slub.c:3318 [inline] __kmem_cache_alloc_node+0x47/0x260 mm/slub.c:3437 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1045 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] alloc_workqueue_attrs+0x46/0xc0 kernel/workqueue.c:3394 wq_numa_init+0x122/0x4b0 kernel/workqueue.c:5959 workqueue_init+0x22/0x59d kernel/workqueue.c:6086 kernel_init_freeable+0x40a/0x61f init/main.c:1614 kernel_init+0x19/0x290 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 INITIAL USE at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __fs_reclaim_acquire mm/page_alloc.c:4683 [inline] fs_reclaim_acquire+0x83/0x120 mm/page_alloc.c:4697 might_alloc include/linux/sched/mm.h:271 [inline] slab_pre_alloc_hook+0x2a/0x2a0 mm/slab.h:710 slab_alloc_node mm/slub.c:3318 [inline] __kmem_cache_alloc_node+0x47/0x260 mm/slub.c:3437 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1045 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] alloc_workqueue_attrs+0x46/0xc0 kernel/workqueue.c:3394 wq_numa_init+0x122/0x4b0 kernel/workqueue.c:5959 workqueue_init+0x22/0x59d kernel/workqueue.c:6086 kernel_init_freeable+0x40a/0x61f init/main.c:1614 kernel_init+0x19/0x290 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 } ... key at: [] __fs_reclaim_map+0x0/0xe0 ... acquired at: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __fs_reclaim_acquire mm/page_alloc.c:4683 [inline] fs_reclaim_acquire+0x83/0x120 mm/page_alloc.c:4697 might_alloc include/linux/sched/mm.h:271 [inline] slab_pre_alloc_hook+0x2a/0x2a0 mm/slab.h:710 slab_alloc_node mm/slub.c:3318 [inline] __kmem_cache_alloc_node+0x47/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node+0xa2/0x230 mm/slab_common.c:962 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0x6e/0x180 mm/util.c:581 kvmalloc include/linux/slab.h:706 [inline] get_dist_table+0x91/0x380 net/sched/sch_netem.c:788 netem_change+0x9a0/0x1ea0 net/sched/sch_netem.c:992 netem_init+0x58/0xb0 net/sched/sch_netem.c:1072 qdisc_create+0x8a1/0x1220 net/sched/sch_api.c:1314 tc_modify_qdisc+0x9e0/0x1da0 net/sched/sch_api.c:1723 rtnetlink_rcv_msg+0x776/0xf00 net/core/rtnetlink.c:6097 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2524 netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline] netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1354 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1902 sock_sendmsg_nosec net/socket.c:716 [inline] sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmsg+0x2a9/0x390 net/socket.c:2565 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd stack backtrace: CPU: 1 PID: 10827 Comm: syz-executor.2 Not tainted 6.1.38-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2612 [inline] check_irq_usage kernel/locking/lockdep.c:2851 [inline] check_prev_add kernel/locking/lockdep.c:3102 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x4d2e/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 __fs_reclaim_acquire mm/page_alloc.c:4683 [inline] fs_reclaim_acquire+0x83/0x120 mm/page_alloc.c:4697 might_alloc include/linux/sched/mm.h:271 [inline] slab_pre_alloc_hook+0x2a/0x2a0 mm/slab.h:710 slab_alloc_node mm/slub.c:3318 [inline] __kmem_cache_alloc_node+0x47/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node+0xa2/0x230 mm/slab_common.c:962 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0x6e/0x180 mm/util.c:581 kvmalloc include/linux/slab.h:706 [inline] get_dist_table+0x91/0x380 net/sched/sch_netem.c:788 netem_change+0x9a0/0x1ea0 net/sched/sch_netem.c:992 netem_init+0x58/0xb0 net/sched/sch_netem.c:1072 qdisc_create+0x8a1/0x1220 net/sched/sch_api.c:1314 tc_modify_qdisc+0x9e0/0x1da0 net/sched/sch_api.c:1723 rtnetlink_rcv_msg+0x776/0xf00 net/core/rtnetlink.c:6097 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2524 netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline] netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1354 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1902 sock_sendmsg_nosec net/socket.c:716 [inline] sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmsg+0x2a9/0x390 net/socket.c:2565 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fbb5a08c389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 RSP: 002b:00007fbb5aea3168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fbb5a1abf80 RCX: 00007fbb5a08c389 RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003 RBP: 00007fbb5a0d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc3e73859f R14: 00007fbb5aea3300 R15: 0000000000022000 BUG: sleeping function called from invalid context at include/linux/sched/mm.h:274 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 10827, name: syz-executor.2 preempt_count: 201, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [<0000000000000000>] 0x0 CPU: 1 PID: 10827 Comm: syz-executor.2 Not tainted 6.1.38-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 __might_resched+0x5cb/0x780 kernel/sched/core.c:9941 might_alloc include/linux/sched/mm.h:274 [inline] slab_pre_alloc_hook+0x4a/0x2a0 mm/slab.h:710 slab_alloc_node mm/slub.c:3318 [inline] __kmem_cache_alloc_node+0x47/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node+0xa2/0x230 mm/slab_common.c:962 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0x6e/0x180 mm/util.c:581 kvmalloc include/linux/slab.h:706 [inline] get_dist_table+0x91/0x380 net/sched/sch_netem.c:788 netem_change+0x9a0/0x1ea0 net/sched/sch_netem.c:992 netem_init+0x58/0xb0 net/sched/sch_netem.c:1072 qdisc_create+0x8a1/0x1220 net/sched/sch_api.c:1314 tc_modify_qdisc+0x9e0/0x1da0 net/sched/sch_api.c:1723 rtnetlink_rcv_msg+0x776/0xf00 net/core/rtnetlink.c:6097 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2524 netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline] netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1354 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1902 sock_sendmsg_nosec net/socket.c:716 [inline] sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmsg+0x2a9/0x390 net/socket.c:2565 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fbb5a08c389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 RSP: 002b:00007fbb5aea3168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fbb5a1abf80 RCX: 00007fbb5a08c389 RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003 RBP: 00007fbb5a0d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc3e73859f R14: 00007fbb5aea3300 R15: 0000000000022000