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BUG: KASAN: slab-use-after-free in __update_min_deadline kernel/sched/fair.c:803 [inline]
BUG: KASAN: slab-use-after-free in min_deadline_update kernel/sched/fair.c:819 [inline]
BUG: KASAN: slab-use-after-free in min_deadline_cb_propagate kernel/sched/fair.c:825 [inline]
BUG: KASAN: slab-use-after-free in reweight_entity+0x248/0x2b8 kernel/sched/fair.c:3660
Read at addr fcff000006829070 by task syz-executor.0/20694
Pointer tag: [fc], memory tag: [fe]

CPU: 0 PID: 20694 Comm: syz-executor.0 Not tainted 6.6.0-rc6-syzkaller-00312-g4d7b04c0cda3 #0
Hardware name: linux,dummy-virt (DT)
Call trace:
 dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:233
 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:240
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x48/0x60 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x108/0x618 mm/kasan/report.c:475
 kasan_report+0x88/0xac mm/kasan/report.c:588
 report_tag_fault arch/arm64/mm/fault.c:334 [inline]
 do_tag_recovery arch/arm64/mm/fault.c:346 [inline]
 __do_kernel_fault+0x17c/0x1e8 arch/arm64/mm/fault.c:393
 do_bad_area arch/arm64/mm/fault.c:493 [inline]
 do_tag_check_fault+0x78/0x8c arch/arm64/mm/fault.c:770
 do_mem_abort+0x44/0x94 arch/arm64/mm/fault.c:846
 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:398
 el1h_64_sync_handler+0xd8/0xe4 arch/arm64/kernel/entry-common.c:458
 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:590
 __update_min_deadline kernel/sched/fair.c:803 [inline]
 min_deadline_update kernel/sched/fair.c:819 [inline]
 min_deadline_cb_propagate kernel/sched/fair.c:825 [inline]
 reweight_entity+0x248/0x2b8 kernel/sched/fair.c:3660
 update_cfs_group+0x80/0x98 kernel/sched/fair.c:3826
 entity_tick kernel/sched/fair.c:5317 [inline]
 task_tick_fair+0x64/0x280 kernel/sched/fair.c:12392
 scheduler_tick+0xcc/0x170 kernel/sched/core.c:5657
 update_process_times+0xa0/0xb4 kernel/time/timer.c:2076
 tick_sched_handle+0x34/0x58 kernel/time/tick-sched.c:254
 tick_sched_timer+0x50/0xa8 kernel/time/tick-sched.c:1492
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x138/0x1d8 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0xe8/0x244 kernel/time/hrtimer.c:1814
 timer_handler drivers/clocksource/arm_arch_timer.c:674 [inline]
 arch_timer_handler_phys+0x2c/0x44 drivers/clocksource/arm_arch_timer.c:692
 handle_percpu_devid_irq+0x84/0x130 kernel/irq/chip.c:942
 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
 handle_irq_desc kernel/irq/irqdesc.c:672 [inline]
 generic_handle_domain_irq+0x2c/0x44 kernel/irq/irqdesc.c:728
 gic_handle_irq+0x44/0xc8 drivers/irqchip/irq-gic.c:373
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:886
 do_interrupt_handler+0x80/0x84 arch/arm64/kernel/entry-common.c:276
 __el1_irq arch/arm64/kernel/entry-common.c:502 [inline]
 el1_interrupt+0x34/0x64 arch/arm64/kernel/entry-common.c:517
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:522
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:591
 save_stack_info+0x0/0x118 mm/kasan/report_hw_tags.c:71
 __kasan_slab_alloc+0x94/0xcc mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook mm/slab.h:762 [inline]
 slab_alloc_node mm/slub.c:3478 [inline]
 slab_alloc mm/slub.c:3486 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
 kmem_cache_alloc+0x144/0x290 mm/slub.c:3502
 kmem_cache_zalloc include/linux/slab.h:710 [inline]
 __kernfs_new_node+0x6c/0x234 fs/kernfs/dir.c:615
 kernfs_new_node+0x48/0x70 fs/kernfs/dir.c:679
 __kernfs_create_file+0x30/0xf0 fs/kernfs/file.c:1047
 sysfs_add_file_mode_ns+0x70/0x134 fs/sysfs/file.c:294
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0xf8/0x39c fs/sysfs/group.c:152
 sysfs_create_group+0x18/0x24 fs/sysfs/group.c:178
 netdev_queue_add_kobject net/core/net-sysfs.c:1701 [inline]
 netdev_queue_update_kobjects+0xe0/0x210 net/core/net-sysfs.c:1747
 register_queue_kobjects net/core/net-sysfs.c:1808 [inline]
 netdev_register_kobject+0xe8/0x178 net/core/net-sysfs.c:2048
 register_netdevice+0x2bc/0x500 net/core/dev.c:10165
 __ip_tunnel_create+0x128/0x1a8 net/ipv4/ip_tunnel.c:267
 ip_tunnel_init_net+0xbc/0x180 net/ipv4/ip_tunnel.c:1091
 ipgre_tap_init_net+0x28/0x34 net/ipv4/ip_gre.c:1694
 ops_init+0x40/0x148 net/core/net_namespace.c:136
 setup_net+0x178/0x3a0 net/core/net_namespace.c:339
 copy_net_ns+0x130/0x380 net/core/net_namespace.c:491
 create_new_namespaces+0x114/0x348 kernel/nsproxy.c:110
 copy_namespaces+0xd0/0x128 kernel/nsproxy.c:179
 copy_process+0xae0/0x147c kernel/fork.c:2504
 kernel_clone+0x64/0x360 kernel/fork.c:2909
 __do_sys_clone+0x70/0xa8 kernel/fork.c:3052
 __se_sys_clone kernel/fork.c:3020 [inline]
 __arm64_sys_clone+0x20/0x2c kernel/fork.c:3020
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:51
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:155
 el0_svc+0x40/0x114 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:595

Allocated by task 2914:
 kasan_save_stack+0x3c/0x64 mm/kasan/common.c:45
 save_stack_info+0x38/0x118 mm/kasan/tags.c:104
 kasan_save_alloc_info+0x14/0x20 mm/kasan/tags.c:138
 __kasan_slab_alloc+0x94/0xcc mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook mm/slab.h:762 [inline]
 slab_alloc_node mm/slub.c:3478 [inline]
 kmem_cache_alloc_node+0x150/0x2b8 mm/slub.c:3523
 alloc_task_struct_node kernel/fork.c:173 [inline]
 dup_task_struct kernel/fork.c:1110 [inline]
 copy_process+0x1b4/0x147c kernel/fork.c:2327
 kernel_clone+0x64/0x360 kernel/fork.c:2909
 __do_sys_clone+0x70/0xa8 kernel/fork.c:3052
 __se_sys_clone kernel/fork.c:3020 [inline]
 __arm64_sys_clone+0x20/0x2c kernel/fork.c:3020
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:51
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:155
 el0_svc+0x40/0x114 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:595

Freed by task 22:
 kasan_save_stack+0x3c/0x64 mm/kasan/common.c:45
 save_stack_info+0x38/0x118 mm/kasan/tags.c:104
 kasan_save_free_info+0x18/0x24 mm/kasan/tags.c:143
 ____kasan_slab_free.constprop.0+0x180/0x1c8 mm/kasan/common.c:236
 __kasan_slab_free+0x10/0x1c mm/kasan/common.c:244
 kasan_slab_free include/linux/kasan.h:164 [inline]
 slab_free_hook mm/slub.c:1800 [inline]
 slab_free_freelist_hook+0xac/0x1c4 mm/slub.c:1826
 slab_free mm/slub.c:3809 [inline]
 kmem_cache_free+0x18c/0x314 mm/slub.c:3831
 free_task_struct kernel/fork.c:178 [inline]
 free_task+0x54/0x80 kernel/fork.c:627
 __put_task_struct+0x100/0x154 kernel/fork.c:981
 put_task_struct include/linux/sched/task.h:136 [inline]
 delayed_put_task_struct+0x7c/0xa8 kernel/exit.c:226
 rcu_do_batch kernel/rcu/tree.c:2139 [inline]
 rcu_core+0x250/0x638 kernel/rcu/tree.c:2403
 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2420
 __do_softirq+0x10c/0x284 kernel/softirq.c:553

The buggy address belongs to the object at ffff000006828fc0
 which belongs to the cache task_struct of size 4032
The buggy address is located 176 bytes inside of
 4032-byte region [ffff000006828fc0, ffff000006829f80)

The buggy address belongs to the physical page:
page:0000000072fcc8c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xfcff000006828fc0 pfn:0x46828
head:0000000072fcc8c0 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:f5ff0000414c7d81
flags: 0x1ffc00000000840(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0)
page_type: 0xffffffff()
raw: 01ffc00000000840 f7ff000002c0cf00 fffffc0000f07000 dead000000000006
raw: fcff000006828fc0 0000000080080006 00000001ffffffff f5ff0000414c7d81
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff000006828e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
 ffff000006828f00: fa fa fa fa fa fa fa fa fa fa fa fa fe fe fe fe
>ffff000006829000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
                                        ^
 ffff000006829100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 ffff000006829200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
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