==================================================================
BUG: KASAN: use-after-free in __hlist_del include/linux/list.h:791 [inline]
BUG: KASAN: use-after-free in detach_timer kernel/time/timer.c:824 [inline]
BUG: KASAN: use-after-free in expire_timers kernel/time/timer.c:1482 [inline]
BUG: KASAN: use-after-free in __run_timers+0x7be/0xbe0 kernel/time/timer.c:1817
Write of size 8 at addr ffff8881da05f1c8 by task syz.6.1080/4737

CPU: 1 PID: 4737 Comm: syz.6.1080 Not tainted 5.4.290-syzkaller-00017-g6b07fcd94a6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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:539 [inline]
 smp_apic_timer_interrupt+0x11a/0x490 arch/x86/kernel/apic/apic.c:1161
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:zap_pte_range mm/memory.c:1155 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1222 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1251 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1272 [inline]
RIP: 0010:unmap_page_range+0xb36/0x2620 mm/memory.c:1293
Code: 08 4c 8b 6c 24 20 48 8b 5c 24 10 4c 39 b4 24 58 01 00 00 0f 84 c6 0b 00 00 4c 8b ac 24 98 00 00 00 49 83 c5 08 e8 ba 71 d9 ff <48> 83 c3 08 49 81 c6 00 10 00 00 4c 89 74 24 08 49 89 de 49 c1 ee
RSP: 0018:ffff8881db67f5a0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff818ad946 RBX: ffff8881dc3b23b0 RCX: ffff8881ec542f40
RDX: 0000000000000000 RSI: 00000000000001fe RDI: 000000000000006f
RBP: ffff8881db67f790 R08: ffffffff818d6489 R09: fffff94000ed3397
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881dc3b23b8 R14: 00007f3aaac76000 R15: ffffea0007699c80
 unmap_single_vma mm/memory.c:1338 [inline]
 unmap_vmas+0x355/0x4b0 mm/memory.c:1370
 exit_mmap+0x2bc/0x520 mm/mmap.c:3191
 __mmput+0x8e/0x2c0 kernel/fork.c:1101
 exit_mm kernel/exit.c:538 [inline]
 do_exit+0xc08/0x2bc0 kernel/exit.c:848
 do_group_exit+0x138/0x300 kernel/exit.c:984
 get_signal+0xdb1/0x1440 kernel/signal.c:2738
 do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f3aab820169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3aa9e690e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f3aaba39088 RCX: 00007f3aab820169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3aaba39088
RBP: 00007f3aaba39080 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3aaba3908c
R13: 0000000000000000 R14: 00007ffdbea05670 R15: 00007ffdbea05758

The buggy address belongs to the page:
page:ffffea00076817c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 ffffea00077aa608 ffffea0007681788 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+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_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+0x1bb/0xd00 mm/percpu-vm.c:284
 pcpu_alloc+0x79e/0x1050 mm/percpu.c:1714
 prealloc_init+0x238/0x800 kernel/bpf/hashtab.c:154
 htab_map_alloc+0x638/0x930 kernel/bpf/hashtab.c:385
 find_and_alloc_map kernel/bpf/syscall.c:122 [inline]
 map_create kernel/bpf/syscall.c:573 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2873 [inline]
 __se_sys_bpf+0x3291/0xbcb0 kernel/bpf/syscall.c:2849
 do_syscall_64+0xca/0x1c0 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+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:
 ffff8881da05f080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881da05f100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881da05f180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff8881da05f200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881da05f280: 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 1ef73d067 P4D 1ef73d067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4737 Comm: syz.6.1080 Tainted: G    B             5.4.290-syzkaller-00017-g6b07fcd94a6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010202
RAX: ffffffff8154e8ca RBX: 0000000000000101 RCX: ffff8881ec542f40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881da05f1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154e50e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000fffff708
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881da05f1c0
FS:  00007f3aa9e696c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001f41cd000 CR4: 00000000003406a0
DR0: 0000400000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
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:539 [inline]
 smp_apic_timer_interrupt+0x11a/0x490 arch/x86/kernel/apic/apic.c:1161
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:zap_pte_range mm/memory.c:1155 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1222 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1251 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1272 [inline]
RIP: 0010:unmap_page_range+0xb36/0x2620 mm/memory.c:1293
Code: 08 4c 8b 6c 24 20 48 8b 5c 24 10 4c 39 b4 24 58 01 00 00 0f 84 c6 0b 00 00 4c 8b ac 24 98 00 00 00 49 83 c5 08 e8 ba 71 d9 ff <48> 83 c3 08 49 81 c6 00 10 00 00 4c 89 74 24 08 49 89 de 49 c1 ee
RSP: 0018:ffff8881db67f5a0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff818ad946 RBX: ffff8881dc3b23b0 RCX: ffff8881ec542f40
RDX: 0000000000000000 RSI: 00000000000001fe RDI: 000000000000006f
RBP: ffff8881db67f790 R08: ffffffff818d6489 R09: fffff94000ed3397
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881dc3b23b8 R14: 00007f3aaac76000 R15: ffffea0007699c80
 unmap_single_vma mm/memory.c:1338 [inline]
 unmap_vmas+0x355/0x4b0 mm/memory.c:1370
 exit_mmap+0x2bc/0x520 mm/mmap.c:3191
 __mmput+0x8e/0x2c0 kernel/fork.c:1101
 exit_mm kernel/exit.c:538 [inline]
 do_exit+0xc08/0x2bc0 kernel/exit.c:848
 do_group_exit+0x138/0x300 kernel/exit.c:984
 get_signal+0xdb1/0x1440 kernel/signal.c:2738
 do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f3aab820169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3aa9e690e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f3aaba39088 RCX: 00007f3aab820169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3aaba39088
RBP: 00007f3aaba39080 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3aaba3908c
R13: 0000000000000000 R14: 00007ffdbea05670 R15: 00007ffdbea05758
Modules linked in:
CR2: 0000000000000000
---[ end trace c8214134f6ae1a6b ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010202
RAX: ffffffff8154e8ca RBX: 0000000000000101 RCX: ffff8881ec542f40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881da05f1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154e50e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000fffff708
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881da05f1c0
FS:  00007f3aa9e696c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001f41cd000 CR4: 00000000003406a0
DR0: 0000400000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	08 4c 8b 6c          	or     %cl,0x6c(%rbx,%rcx,4)
   4:	24 20                	and    $0x20,%al
   6:	48 8b 5c 24 10       	mov    0x10(%rsp),%rbx
   b:	4c 39 b4 24 58 01 00 	cmp    %r14,0x158(%rsp)
  12:	00
  13:	0f 84 c6 0b 00 00    	je     0xbdf
  19:	4c 8b ac 24 98 00 00 	mov    0x98(%rsp),%r13
  20:	00
  21:	49 83 c5 08          	add    $0x8,%r13
  25:	e8 ba 71 d9 ff       	call   0xffd971e4
* 2a:	48 83 c3 08          	add    $0x8,%rbx <-- trapping instruction
  2e:	49 81 c6 00 10 00 00 	add    $0x1000,%r14
  35:	4c 89 74 24 08       	mov    %r14,0x8(%rsp)
  3a:	49 89 de             	mov    %rbx,%r14
  3d:	49                   	rex.WB
  3e:	c1                   	.byte 0xc1
  3f:	ee                   	out    %al,(%dx)