==================================================================
BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:852 [inline]
BUG: KASAN: use-after-free in __collect_expired_timers kernel/time/timer.c:1484 [inline]
BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1719 [inline]
BUG: KASAN: use-after-free in __run_timers+0x4a8/0x6b0 kernel/time/timer.c:1783
Write of size 8 at addr ffff8881ca7c71c8 by task syz-executor.2/2069

CPU: 0 PID: 2069 Comm: syz-executor.2 Not tainted 5.4.210-syzkaller-00005-g8c70a830a157 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18e/0x1d5 lib/dump_stack.c:118
 print_address_description+0x8c/0x630 mm/kasan/report.c:384
 __kasan_report+0xf6/0x130 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 hlist_move_list include/linux/list.h:852 [inline]
 __collect_expired_timers kernel/time/timer.c:1484 [inline]
 collect_expired_timers kernel/time/timer.c:1719 [inline]
 __run_timers+0x4a8/0x6b0 kernel/time/timer.c:1783
 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800
 __do_softirq+0x23e/0x643 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+0x113/0x440 arch/x86/kernel/apic/apic.c:1150
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x45/0x60 kernel/locking/spinlock.c:199
Code: 08 00 74 0c 48 c7 c7 d0 cd aa 85 e8 55 15 6d fd 48 83 3d 2d d8 8a 01 00 74 29 48 89 df e8 43 87 29 fd 66 90 fb bf 01 00 00 00 <e8> 66 f9 22 fd 65 8b 05 cb 97 e2 7b 85 c0 74 02 5b c3 e8 34 4c e0
RSP: 0000:ffff8881f4fe7178 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881c1941bf0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8881c1941c48 R08: ffffffff821d1134 R09: ffffed103e9fce2a
R10: ffffed103e9fce2a R11: 1ffff1103e9fce29 R12: 0000000000000cc0
R13: ffff8881f4fe71e8 R14: 0000000000000cc0 R15: ffffea0007488480
 spin_unlock_irq include/linux/spinlock.h:388 [inline]
 __add_to_page_cache_locked+0x49b/0x820 mm/filemap.c:915
 add_to_page_cache_lru+0xcf/0x260 mm/filemap.c:962
 pagecache_get_page+0x539/0x760 mm/filemap.c:1701
 grab_cache_page_write_begin+0x50/0x90 mm/filemap.c:3261
 ext4_da_write_begin+0x52b/0xef0 fs/ext4/inode.c:3137
 generic_perform_write+0x290/0x510 mm/filemap.c:3311
 __generic_file_write_iter+0x239/0x490 mm/filemap.c:3440
 ext4_file_write_iter+0x46e/0x1040 fs/ext4/file.c:270
 call_write_iter include/linux/fs.h:1976 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x4f9/0x6a0 fs/read_write.c:496
 __kernel_write+0x12c/0x340 fs/read_write.c:515
 dump_emit+0x1cc/0x2d0 fs/coredump.c:838
 elf_core_dump+0x39f1/0x42a0 fs/binfmt_elf.c:2352
 do_coredump+0x1d70/0x2ca0 fs/coredump.c:801
 get_signal+0xd5b/0x13f0 kernel/signal.c:2729
 do_signal+0x41/0x10a0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xdd/0x1d0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x17c/0x1d0 arch/x86/entry/common.c:194
 retint_user+0x8/0x8
RIP: 0033:0x7f0c0e9e25b1
Code: 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 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:00002a452cb9d000 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f0c0eb03050 RCX: 00007f0c0e9e25a9
RDX: 0000000000000000 RSI: 00002a452cb9d000 RDI: 0000000050000000
RBP: 00007f0c0ea3d580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffd082b685f R14: 00007f0c0db35300 R15: 0000000000022000

The buggy address belongs to the page:
page:ffffea000729f1c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 ffffea0007ad7fc8 ffffea00071414c8 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+0x194/0x380 mm/page_alloc.c:2171
 get_page_from_freelist+0x524/0x560 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x2ab/0x6f0 mm/page_alloc.c:4857
 __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+0x121/0xca0 mm/percpu-vm.c:284
 pcpu_alloc+0x7dc/0x1060 mm/percpu.c:1714
 prealloc_init kernel/bpf/hashtab.c:154 [inline]
 htab_map_alloc+0x88c/0x11f0 kernel/bpf/hashtab.c:378
 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:2871 [inline]
 __se_sys_bpf+0x301e/0xba40 kernel/bpf/syscall.c:2847
 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
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+0x1a4/0x290 mm/page_alloc.c:1233
 free_unref_page_prepare mm/page_alloc.c:3085 [inline]
 free_unref_page mm/page_alloc.c:3134 [inline]
 free_the_page mm/page_alloc.c:4917 [inline]
 __free_pages+0x52/0x1e0 mm/page_alloc.c:4925
 pcpu_free_pages mm/percpu-vm.c:64 [inline]
 pcpu_depopulate_chunk mm/percpu-vm.c:328 [inline]
 pcpu_balance_workfn+0x934/0x1270 mm/percpu.c:1865
 process_one_work+0x6ca/0xc40 kernel/workqueue.c:2287
 worker_thread+0xae0/0x1440 kernel/workqueue.c:2433
 kthread+0x2d8/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Memory state around the buggy address:
 ffff8881ca7c7080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881ca7c7100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881ca7c7180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff8881ca7c7200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881ca7c7280: 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 1d135b067 P4D 1d135b067 PUD 1c4d4c067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2069 Comm: syz-executor.2 Tainted: G    B             5.4.210-syzkaller-00005-g8c70a830a157 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0000:ffff8881f6e09d30 EFLAGS: 00010202
RAX: ffffffff8151cbb9 RBX: 0000000000000101 RCX: ffff8881ed552f40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881ca7c71c0
RBP: ffff8881ca7c71e0 R08: ffffffff8151c992 R09: fffffbfff0d7370d
R10: fffffbfff0d7370d R11: 1ffffffff0d7370c R12: 00000000ffffa4a0
R13: 1ffff1103edc92f1 R14: 0000000000000000 R15: ffff8881ca7c71c0
FS:  00007f0c0db35700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ca4ff000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x31/0x350 kernel/time/timer.c:1418
 expire_timers+0x21e/0x400 kernel/time/timer.c:1463
 __run_timers+0x5b0/0x6b0 kernel/time/timer.c:1787
 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800
 __do_softirq+0x23e/0x643 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+0x113/0x440 arch/x86/kernel/apic/apic.c:1150
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x45/0x60 kernel/locking/spinlock.c:199
Code: 08 00 74 0c 48 c7 c7 d0 cd aa 85 e8 55 15 6d fd 48 83 3d 2d d8 8a 01 00 74 29 48 89 df e8 43 87 29 fd 66 90 fb bf 01 00 00 00 <e8> 66 f9 22 fd 65 8b 05 cb 97 e2 7b 85 c0 74 02 5b c3 e8 34 4c e0
RSP: 0000:ffff8881f4fe7178 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881c1941bf0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8881c1941c48 R08: ffffffff821d1134 R09: ffffed103e9fce2a
R10: ffffed103e9fce2a R11: 1ffff1103e9fce29 R12: 0000000000000cc0
R13: ffff8881f4fe71e8 R14: 0000000000000cc0 R15: ffffea0007488480
 spin_unlock_irq include/linux/spinlock.h:388 [inline]
 __add_to_page_cache_locked+0x49b/0x820 mm/filemap.c:915
 add_to_page_cache_lru+0xcf/0x260 mm/filemap.c:962
 pagecache_get_page+0x539/0x760 mm/filemap.c:1701
 grab_cache_page_write_begin+0x50/0x90 mm/filemap.c:3261
 ext4_da_write_begin+0x52b/0xef0 fs/ext4/inode.c:3137
 generic_perform_write+0x290/0x510 mm/filemap.c:3311
 __generic_file_write_iter+0x239/0x490 mm/filemap.c:3440
 ext4_file_write_iter+0x46e/0x1040 fs/ext4/file.c:270
 call_write_iter include/linux/fs.h:1976 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x4f9/0x6a0 fs/read_write.c:496
 __kernel_write+0x12c/0x340 fs/read_write.c:515
 dump_emit+0x1cc/0x2d0 fs/coredump.c:838
 elf_core_dump+0x39f1/0x42a0 fs/binfmt_elf.c:2352
 do_coredump+0x1d70/0x2ca0 fs/coredump.c:801
 get_signal+0xd5b/0x13f0 kernel/signal.c:2729
 do_signal+0x41/0x10a0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xdd/0x1d0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x17c/0x1d0 arch/x86/entry/common.c:194
 retint_user+0x8/0x8
RIP: 0033:0x7f0c0e9e25b1
Code: 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 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:00002a452cb9d000 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f0c0eb03050 RCX: 00007f0c0e9e25a9
RDX: 0000000000000000 RSI: 00002a452cb9d000 RDI: 0000000050000000
RBP: 00007f0c0ea3d580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffd082b685f R14: 00007f0c0db35300 R15: 0000000000022000
Modules linked in:
CR2: 0000000000000000
---[ end trace 3deb7eb9aad290ca ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0000:ffff8881f6e09d30 EFLAGS: 00010202
RAX: ffffffff8151cbb9 RBX: 0000000000000101 RCX: ffff8881ed552f40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881ca7c71c0
RBP: ffff8881ca7c71e0 R08: ffffffff8151c992 R09: fffffbfff0d7370d
R10: fffffbfff0d7370d R11: 1ffffffff0d7370c R12: 00000000ffffa4a0
R13: 1ffff1103edc92f1 R14: 0000000000000000 R15: ffff8881ca7c71c0
FS:  00007f0c0db35700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ca4ff000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	08 00                	or     %al,(%rax)
   2:	74 0c                	je     0x10
   4:	48 c7 c7 d0 cd aa 85 	mov    $0xffffffff85aacdd0,%rdi
   b:	e8 55 15 6d fd       	callq  0xfd6d1565
  10:	48 83 3d 2d d8 8a 01 	cmpq   $0x0,0x18ad82d(%rip)        # 0x18ad845
  17:	00
  18:	74 29                	je     0x43
  1a:	48 89 df             	mov    %rbx,%rdi
  1d:	e8 43 87 29 fd       	callq  0xfd298765
  22:	66 90                	xchg   %ax,%ax
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 66 f9 22 fd       	callq  0xfd22f995 <-- trapping instruction
  2f:	65 8b 05 cb 97 e2 7b 	mov    %gs:0x7be297cb(%rip),%eax        # 0x7be29801
  36:	85 c0                	test   %eax,%eax
  38:	74 02                	je     0x3c
  3a:	5b                   	pop    %rbx
  3b:	c3                   	retq
  3c:	e8                   	.byte 0xe8
  3d:	34 4c                	xor    $0x4c,%al
  3f:	e0                   	.byte 0xe0