==================================================================
BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:870 [inline]
BUG: KASAN: use-after-free in __collect_expired_timers kernel/time/timer.c:1514 [inline]
BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1749 [inline]
BUG: KASAN: use-after-free in __run_timers+0x4f5/0xb60 kernel/time/timer.c:1813
Write of size 8 at addr ffff8881ef36f1c8 by task syz.7.7599/20476

CPU: 0 PID: 20476 Comm: syz.7.7599 Tainted: G        W         5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <IRQ>
 __dump_stack+0x1e/0x20 lib/dump_stack.c:77
 dump_stack+0x15b/0x1b8 lib/dump_stack.c:118
 print_address_description+0x8d/0x4c0 mm/kasan/report.c:384
 __kasan_report+0xef/0x120 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 __asan_report_store8_noabort+0x17/0x20 mm/kasan/generic_report.c:137
 hlist_move_list include/linux/list.h:870 [inline]
 __collect_expired_timers kernel/time/timer.c:1514 [inline]
 collect_expired_timers kernel/time/timer.c:1749 [inline]
 __run_timers+0x4f5/0xb60 kernel/time/timer.c:1813
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x236/0x660 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x197/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0033:0x7fd81570cda5
Code: 72 f3 48 83 e8 08 48 39 f2 73 17 66 2e 0f 1f 84 00 00 00 00 00 48 8b 70 f8 48 83 e8 08 48 39 f2 72 f3 48 39 c3 73 3e 48 89 33 <48> 83 c3 08 48 8b 70 f8 48 89 08 48 8b 0b 49 8b 14 24 eb bf 48 39
RSP: 002b:00007ffddc9886f0 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13
RAX: 00007fd814fa1500 RBX: 00007fd814fa11d8 RCX: ffffffff82209b0e
RDX: ffffffff82209b0e RSI: ffffffff82209b0e RDI: 00007fd814fa1788
RBP: 00007fd814fa0f58 R08: 00007fd814fa1368 R09: 00007fd815a47000
R10: 00007fd814ea4008 R11: 0000000000000009 R12: 00007fd814fa0f50
R13: 0000000000000018 R14: 000000000006b680 R15: 00007fd814ea4008

The buggy address belongs to the page:
page:ffffea0007bcdbc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 ffffea00076dc308 ffffea0007bcdb88 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102cc2(GFP_HIGHUSER|__GFP_NOWARN)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x35e/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x1296/0x1310 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x202/0x4b0 mm/page_alloc.c:4894
 __alloc_pages include/linux/gfp.h:503 [inline]
 __alloc_pages_node include/linux/gfp.h:516 [inline]
 alloc_pages_node include/linux/gfp.h:530 [inline]
 pcpu_alloc_pages mm/percpu-vm.c:94 [inline]
 pcpu_populate_chunk+0x1b6/0xce0 mm/percpu-vm.c:284
 pcpu_alloc+0x8ec/0x1120 mm/percpu.c:1714
 __alloc_percpu_gfp+0x25/0x30 mm/percpu.c:1783
 prealloc_init+0x24b/0x810 kernel/bpf/hashtab.c:154
 htab_map_alloc+0x65f/0x940 kernel/bpf/hashtab.c:385
 find_and_alloc_map kernel/bpf/syscall.c:122 [inline]
 map_create+0x2d8/0x980 kernel/bpf/syscall.c:573
 __do_sys_bpf kernel/bpf/syscall.c:2873 [inline]
 __se_sys_bpf+0x2dc/0x570 kernel/bpf/syscall.c:2849
 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:2849
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
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+0x2a9/0x3a0 mm/page_alloc.c:3085
 free_unref_page mm/page_alloc.c:3134 [inline]
 free_the_page mm/page_alloc.c:4954 [inline]
 __free_pages+0xaa/0x110 mm/page_alloc.c:4962
 pcpu_free_pages mm/percpu-vm.c:64 [inline]
 pcpu_depopulate_chunk mm/percpu-vm.c:328 [inline]
 pcpu_balance_workfn+0x8c7/0x14b0 mm/percpu.c:1865
 process_one_work+0x73b/0xcc0 kernel/workqueue.c:2290
 worker_thread+0xa5c/0x13b0 kernel/workqueue.c:2436
 kthread+0x31e/0x3a0 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354

Memory state around the buggy address:
 ffff8881ef36f080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881ef36f100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881ef36f180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff8881ef36f200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881ef36f280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1d4728067 P4D 1d4728067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 20476 Comm: syz.7.7599 Tainted: G    B   W         5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0000:ffff8881f6e09cf0 EFLAGS: 00010206
RAX: ffffffff8150a590 RBX: 0000000000000100 RCX: ffff8881e7ee4ec0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881ef36f1c0
RBP: ffff8881f6e09d30 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0ca7a5c R11: 1ffffffff0ca7a5c R12: 0000000100003658
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ef36f1c0
FS:  0000555579c2b500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001d1860000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x81d/0xb60 kernel/time/timer.c:1817
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x236/0x660 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x197/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0033:0x7fd81570cda5
Code: 72 f3 48 83 e8 08 48 39 f2 73 17 66 2e 0f 1f 84 00 00 00 00 00 48 8b 70 f8 48 83 e8 08 48 39 f2 72 f3 48 39 c3 73 3e 48 89 33 <48> 83 c3 08 48 8b 70 f8 48 89 08 48 8b 0b 49 8b 14 24 eb bf 48 39
RSP: 002b:00007ffddc9886f0 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13
RAX: 00007fd814fa1500 RBX: 00007fd814fa11d8 RCX: ffffffff82209b0e
RDX: ffffffff82209b0e RSI: ffffffff82209b0e RDI: 00007fd814fa1788
RBP: 00007fd814fa0f58 R08: 00007fd814fa1368 R09: 00007fd815a47000
R10: 00007fd814ea4008 R11: 0000000000000009 R12: 00007fd814fa0f50
R13: 0000000000000018 R14: 000000000006b680 R15: 00007fd814ea4008
Modules linked in:
CR2: 0000000000000000
---[ end trace a2dfb927f079f171 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0000:ffff8881f6e09cf0 EFLAGS: 00010206
RAX: ffffffff8150a590 RBX: 0000000000000100 RCX: ffff8881e7ee4ec0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881ef36f1c0
RBP: ffff8881f6e09d30 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0ca7a5c R11: 1ffffffff0ca7a5c R12: 0000000100003658
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ef36f1c0
FS:  0000555579c2b500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001d1860000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600