==================================================================
BUG: KASAN: slab-out-of-bounds in __hlist_del include/linux/list.h:791 [inline]
BUG: KASAN: slab-out-of-bounds in detach_timer kernel/time/timer.c:824 [inline]
BUG: KASAN: slab-out-of-bounds in expire_timers kernel/time/timer.c:1482 [inline]
BUG: KASAN: slab-out-of-bounds in __run_timers+0x7be/0xbe0 kernel/time/timer.c:1817
Write of size 8 at addr ffff8881e490b1c8 by task syz-executor.2/974

CPU: 1 PID: 974 Comm: syz-executor.2 Not tainted 5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 print_address_description+0x8c/0x600 mm/kasan/report.c:384
 __kasan_report+0xf3/0x120 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 __hlist_del include/linux/list.h:791 [inline]
 detach_timer kernel/time/timer.c:824 [inline]
 expire_timers kernel/time/timer.c:1482 [inline]
 __run_timers+0x7be/0xbe0 kernel/time/timer.c:1817
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x195/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:538 [inline]
 smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:unwind_next_frame+0x1869/0x1ea0 arch/x86/kernel/unwind_orc.c:613
Code: 01 84 c0 48 8b 9c 24 88 00 00 00 4c 8b 34 24 0f 85 a0 01 00 00 41 c7 06 00 00 00 00 31 c0 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <48> c7 03 00 00 00 00 48 c7 43 09 00 00 00 00 48 c7 43 11 00 00 00
RSP: 0018:ffff8881e8bbee20 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000080000001 RBX: ffffed103d177dd8 RCX: 0000000080000000
RDX: ffff8881e8bbf260 RSI: ffff8881e8bbeda0 RDI: 0000000000000001
RBP: ffff8881e8bbf110 R08: dffffc0000000000 R09: ffff8881e8bbf270
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff0cf60c6
R13: ffffffff867b0633 R14: ffff8881e8bbf2c0 R15: ffff8881e8bb8000
 __unwind_start+0x708/0x890 arch/x86/kernel/unwind_orc.c:691
 unwind_start arch/x86/include/asm/unwind.h:60 [inline]
 arch_stack_walk+0xdd/0x140 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x118/0x1c0 kernel/stacktrace.c:123
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2829 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0xd9/0x250 mm/slub.c:2842
 kmem_cache_zalloc include/linux/slab.h:680 [inline]
 lsm_file_alloc security/security.c:535 [inline]
 security_file_alloc+0x24/0x120 security/security.c:1405
 __alloc_file+0xb1/0x310 fs/file_table.c:106
 alloc_empty_file+0x92/0x180 fs/file_table.c:151
 alloc_file+0x56/0x4f0 fs/file_table.c:193
 alloc_file_pseudo+0x259/0x2f0 fs/file_table.c:233
 __anon_inode_getfile fs/anon_inodes.c:109 [inline]
 __anon_inode_getfd+0x2aa/0x430 fs/anon_inodes.c:165
 bpf_map_new_fd kernel/bpf/syscall.c:448 [inline]
 map_create kernel/bpf/syscall.c:620 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2873 [inline]
 __se_sys_bpf+0x7b21/0xbcb0 kernel/bpf/syscall.c:2849
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f7a4d4c8ea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7a4c8220c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f7a4d600050 RCX: 00007f7a4d4c8ea9
RDX: 0000000000000048 RSI: 0000000020000100 RDI: 0000000000000000
RBP: 00007f7a4d537ff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f7a4d600050 R15: 00007ffda6df3fe8

Allocated by task 916:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
 __kmalloc_node include/linux/slab.h:422 [inline]
 kmalloc_node include/linux/slab.h:599 [inline]
 kvmalloc_node+0x7e/0xf0 mm/util.c:596
 kvmalloc include/linux/mm.h:761 [inline]
 kvmalloc_array include/linux/mm.h:779 [inline]
 __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:470 [inline]
 ptr_ring_init include/linux/ptr_ring.h:488 [inline]
 skb_array_init include/linux/skb_array.h:182 [inline]
 pfifo_fast_init+0x240/0x760 net/sched/sch_generic.c:784
 qdisc_create_dflt+0x129/0x250 net/sched/sch_generic.c:944
 mq_init+0x2c8/0x6b0 net/sched/sch_mq.c:90
 qdisc_create_dflt+0x129/0x250 net/sched/sch_generic.c:944
 attach_default_qdiscs net/sched/sch_generic.c:1113 [inline]
 dev_activate+0x11f/0xc00 net/sched/sch_generic.c:1154
 __dev_open+0x302/0x420 net/core/dev.c:1335
 __dev_change_flags+0x1db/0x6e0 net/core/dev.c:7939
 dev_change_flags+0x87/0x190 net/core/dev.c:8010
 dev_ifsioc+0x104/0xa60 net/core/dev_ioctl.c:226
 dev_ioctl+0x505/0xb40 net/core/dev_ioctl.c:483
 sock_do_ioctl+0x295/0x3a0 net/socket.c:1081
 sock_ioctl+0x4a4/0x760 net/socket.c:1198
 do_vfs_ioctl+0x742/0x1720 fs/ioctl.c:47
 ksys_ioctl fs/ioctl.c:742 [inline]
 __do_sys_ioctl fs/ioctl.c:749 [inline]
 __se_sys_ioctl fs/ioctl.c:747 [inline]
 __x64_sys_ioctl+0xd4/0x110 fs/ioctl.c:747
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 914:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 kasan_set_free_info mm/kasan/common.c:345 [inline]
 __kasan_slab_free+0x1b5/0x270 mm/kasan/common.c:487
 slab_free_hook mm/slub.c:1455 [inline]
 slab_free_freelist_hook mm/slub.c:1494 [inline]
 slab_free mm/slub.c:3080 [inline]
 kfree+0x123/0x370 mm/slub.c:4071
 ptr_ring_cleanup include/linux/ptr_ring.h:670 [inline]
 pfifo_fast_destroy+0x82/0xd0 net/sched/sch_generic.c:810
 qdisc_destroy+0xd2/0x490 net/sched/sch_generic.c:1008
 qdisc_put net/sched/sch_generic.c:1035 [inline]
 shutdown_scheduler_queue net/sched/sch_generic.c:1372 [inline]
 netdev_for_each_tx_queue include/linux/netdevice.h:2194 [inline]
 dev_shutdown+0x18a/0x540 net/sched/sch_generic.c:1378
 rollback_registered_many+0x87d/0x1330 net/core/dev.c:8624
 rollback_registered net/core/dev.c:8673 [inline]
 unregister_netdevice_queue+0x333/0x500 net/core/dev.c:9767
 unregister_netdevice include/linux/netdevice.h:2726 [inline]
 __tun_detach+0x8de/0x1390 drivers/net/tun.c:747
 tun_detach drivers/net/tun.c:763 [inline]
 tun_chr_close+0x8f/0x130 drivers/net/tun.c:3558
 __fput+0x262/0x680 fs/file_table.c:281
 task_work_run+0x140/0x170 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x190/0x1a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

The buggy address belongs to the object at ffff8881e4908000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 4552 bytes to the right of
 8192-byte region [ffff8881e4908000, ffff8881e490a000)
The buggy address belongs to the page:
page:ffffea0007924200 refcount:1 mapcount:0 mapping:ffff8881f5c0c500 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5c0c500
raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
 alloc_slab_page+0x39/0x3c0 mm/slub.c:343
 allocate_slab mm/slub.c:1683 [inline]
 new_slab+0x97/0x440 mm/slub.c:1749
 new_slab_objects mm/slub.c:2505 [inline]
 ___slab_alloc+0x2fe/0x490 mm/slub.c:2667
 __slab_alloc+0x62/0xa0 mm/slub.c:2707
 slab_alloc_node mm/slub.c:2792 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 __kmalloc+0x19b/0x2e0 mm/slub.c:3909
 __kmalloc_node include/linux/slab.h:422 [inline]
 kmalloc_node include/linux/slab.h:599 [inline]
 kvmalloc_node+0x7e/0xf0 mm/util.c:596
 kvmalloc include/linux/mm.h:761 [inline]
 kvmalloc_array include/linux/mm.h:779 [inline]
 __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:470 [inline]
 ptr_ring_init include/linux/ptr_ring.h:488 [inline]
 skb_array_init include/linux/skb_array.h:182 [inline]
 pfifo_fast_init+0x240/0x760 net/sched/sch_generic.c:784
 qdisc_create_dflt+0x129/0x250 net/sched/sch_generic.c:944
 mq_init+0x2c8/0x6b0 net/sched/sch_mq.c:90
 qdisc_create_dflt+0x129/0x250 net/sched/sch_generic.c:944
 attach_default_qdiscs net/sched/sch_generic.c:1113 [inline]
 dev_activate+0x11f/0xc00 net/sched/sch_generic.c:1154
 __dev_open+0x302/0x420 net/core/dev.c:1335
 __dev_change_flags+0x1db/0x6e0 net/core/dev.c:7939
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 free_pcp_prepare mm/page_alloc.c:1233 [inline]
 free_unref_page_prepare+0x297/0x380 mm/page_alloc.c:3085
 free_unref_page mm/page_alloc.c:3134 [inline]
 free_the_page mm/page_alloc.c:4953 [inline]
 __free_pages+0xaf/0x140 mm/page_alloc.c:4961
 pcpu_free_pages mm/percpu-vm.c:64 [inline]
 pcpu_depopulate_chunk mm/percpu-vm.c:328 [inline]
 pcpu_balance_workfn+0x940/0x1450 mm/percpu.c:1865
 process_one_work+0x765/0xd20 kernel/workqueue.c:2290
 worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354

Memory state around the buggy address:
 ffff8881e490b080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881e490b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881e490b180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                              ^
 ffff8881e490b200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881e490b280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1e2b9f067 P4D 1e2b9f067 PUD 1ecf2e067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 974 Comm: syz-executor.2 Tainted: G    B             5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010206
RAX: ffffffff8154d7aa RBX: 0000000000000100 RCX: ffff8881de139f80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e490b1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffa118
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e490b1c0
FS:  00007f7a4c8226c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e00ee000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x36/0x390 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x879/0xbe0 kernel/time/timer.c:1817
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x195/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:538 [inline]
 smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:unwind_next_frame+0x1869/0x1ea0 arch/x86/kernel/unwind_orc.c:613
Code: 01 84 c0 48 8b 9c 24 88 00 00 00 4c 8b 34 24 0f 85 a0 01 00 00 41 c7 06 00 00 00 00 31 c0 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <48> c7 03 00 00 00 00 48 c7 43 09 00 00 00 00 48 c7 43 11 00 00 00
RSP: 0018:ffff8881e8bbee20 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000080000001 RBX: ffffed103d177dd8 RCX: 0000000080000000
RDX: ffff8881e8bbf260 RSI: ffff8881e8bbeda0 RDI: 0000000000000001
RBP: ffff8881e8bbf110 R08: dffffc0000000000 R09: ffff8881e8bbf270
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff0cf60c6
R13: ffffffff867b0633 R14: ffff8881e8bbf2c0 R15: ffff8881e8bb8000
 __unwind_start+0x708/0x890 arch/x86/kernel/unwind_orc.c:691
 unwind_start arch/x86/include/asm/unwind.h:60 [inline]
 arch_stack_walk+0xdd/0x140 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x118/0x1c0 kernel/stacktrace.c:123
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2829 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0xd9/0x250 mm/slub.c:2842
 kmem_cache_zalloc include/linux/slab.h:680 [inline]
 lsm_file_alloc security/security.c:535 [inline]
 security_file_alloc+0x24/0x120 security/security.c:1405
 __alloc_file+0xb1/0x310 fs/file_table.c:106
 alloc_empty_file+0x92/0x180 fs/file_table.c:151
 alloc_file+0x56/0x4f0 fs/file_table.c:193
 alloc_file_pseudo+0x259/0x2f0 fs/file_table.c:233
 __anon_inode_getfile fs/anon_inodes.c:109 [inline]
 __anon_inode_getfd+0x2aa/0x430 fs/anon_inodes.c:165
 bpf_map_new_fd kernel/bpf/syscall.c:448 [inline]
 map_create kernel/bpf/syscall.c:620 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2873 [inline]
 __se_sys_bpf+0x7b21/0xbcb0 kernel/bpf/syscall.c:2849
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f7a4d4c8ea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7a4c8220c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f7a4d600050 RCX: 00007f7a4d4c8ea9
RDX: 0000000000000048 RSI: 0000000020000100 RDI: 0000000000000000
RBP: 00007f7a4d537ff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f7a4d600050 R15: 00007ffda6df3fe8
Modules linked in:
CR2: 0000000000000000
---[ end trace c102c22f67a5cfda ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010206
RAX: ffffffff8154d7aa RBX: 0000000000000100 RCX: ffff8881de139f80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e490b1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffa118
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e490b1c0
FS:  00007f7a4c8226c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e00ee000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	01 84 c0 48 8b 9c 24 	add    %eax,0x249c8b48(%rax,%rax,8)
   7:	88 00                	mov    %al,(%rax)
   9:	00 00                	add    %al,(%rax)
   b:	4c 8b 34 24          	mov    (%rsp),%r14
   f:	0f 85 a0 01 00 00    	jne    0x1b5
  15:	41 c7 06 00 00 00 00 	movl   $0x0,(%r14)
  1c:	31 c0                	xor    %eax,%eax
  1e:	48 c7 84 24 a0 00 00 	movq   $0x45e0360e,0xa0(%rsp)
  25:	00 0e 36 e0 45
* 2a:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx) <-- trapping instruction
  31:	48 c7 43 09 00 00 00 	movq   $0x0,0x9(%rbx)
  38:	00
  39:	48                   	rex.W
  3a:	c7                   	.byte 0xc7
  3b:	43 11 00             	rex.XB adc %eax,(%r8)