==================================================================
BUG: KASAN: slab-use-after-free in hlist_add_head include/linux/list.h:945 [inline]
BUG: KASAN: slab-use-after-free in enqueue_timer+0x4df/0x520 kernel/time/timer.c:605
Write of size 8 at addr ffff888023209500 by task dhcpcd-run-hook/23926

CPU: 1 PID: 23926 Comm: dhcpcd-run-hook Not tainted 6.3.0-syzkaller-07934-g415d7a49cd79 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319
 print_report mm/kasan/report.c:430 [inline]
 kasan_report+0x11c/0x130 mm/kasan/report.c:536
 hlist_add_head include/linux/list.h:945 [inline]
 enqueue_timer+0x4df/0x520 kernel/time/timer.c:605
 internal_add_timer kernel/time/timer.c:634 [inline]
 __mod_timer+0x8b5/0xe80 kernel/time/timer.c:1131
 addrconf_mod_rs_timer net/ipv6/addrconf.c:323 [inline]
 addrconf_rs_timer+0x5ff/0x870 net/ipv6/addrconf.c:3945
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751
 __run_timers kernel/time/timer.c:2022 [inline]
 __run_timers kernel/time/timer.c:1995 [inline]
 run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
 __do_softirq+0x1d4/0x905 kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:mas_next_nentry lib/maple_tree.c:4749 [inline]
RIP: 0010:mas_next_entry+0x5af/0x1c50 lib/maple_tree.c:4833
Code: 38 ed 0f 83 23 02 00 00 e8 3e 58 87 f7 48 8b 44 24 38 45 0f b6 ed 49 c1 e5 03 4a 8d 1c 28 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <0f> 85 0c 11 00 00 48 8b 44 24 50 48 8b 1b 80 38 00 0f 85 08 11 00
RSP: 0018:ffffc9000510f7f8 EFLAGS: 00000246
RAX: 1ffff1100f4b3a04 RBX: ffff88807a59d020 RCX: 0000000000000000
RDX: ffff8880220c3b80 RSI: ffffffff89fc6732 RDI: 0000000000000000
RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000003
R10: 000000000000000b R11: 0000000000094001 R12: 0000560648c28000
R13: 0000000000000018 R14: dffffc0000000000 R15: ffffc9000510f918
 mas_find+0x7d/0x200 lib/maple_tree.c:6114
 validate_mm+0xc1/0x290 mm/mmap.c:349
 do_vmi_align_munmap+0xd4c/0x1000 mm/mmap.c:2440
 do_vmi_munmap+0x26e/0x2c0 mm/mmap.c:2490
 mmap_region+0x1ee/0x2620 mm/mmap.c:2538
 do_mmap+0x831/0xf60 mm/mmap.c:1364
 vm_mmap_pgoff+0x1af/0x280 mm/util.c:542
 ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1410
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fedafbfcb74
Code: 63 08 44 89 e8 5b 41 5c 41 5d c3 41 89 ca 41 f7 c1 ff 0f 00 00 74 0c c7 05 f5 46 01 00 16 00 00 00 eb 17 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 0c f7 d8 89 05 dc 46 01 00 48 83 c8 ff c3 0f
RSP: 002b:00007ffd0eeee668 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007ffd0eeee6e0 RCX: 00007fedafbfcb74
RDX: 0000000000000001 RSI: 0000000000025000 RDI: 00007fedaf90d000
RBP: 00007ffd0eeeea00 R08: 0000000000000003 R09: 000000000002e000
R10: 0000000000000812 R11: 0000000000000246 R12: 00007fedafbe0570
R13: 00007ffd0eeeea88 R14: 000000000002d9c6 R15: 0000000000000000
 </TASK>

Allocated by task 5025:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 ____kasan_kmalloc mm/kasan/common.c:333 [inline]
 __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 __do_kmalloc_node mm/slab_common.c:966 [inline]
 __kmalloc_node+0x61/0x1a0 mm/slab_common.c:973
 kmalloc_node include/linux/slab.h:580 [inline]
 kvmalloc_node+0x76/0x1a0 mm/util.c:603
 kvmalloc include/linux/slab.h:698 [inline]
 kvzalloc include/linux/slab.h:706 [inline]
 alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10626
 rtnl_create_link+0xbeb/0xee0 net/core/rtnetlink.c:3315
 rtnl_newlink_create net/core/rtnetlink.c:3433 [inline]
 __rtnl_newlink+0xfd4/0x1840 net/core/rtnetlink.c:3660
 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3673
 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6395
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 __sys_sendto+0x23a/0x340 net/socket.c:2144
 __do_sys_sendto net/socket.c:2156 [inline]
 __se_sys_sendto net/socket.c:2152 [inline]
 __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2152
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 70:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
 slab_free mm/slub.c:3787 [inline]
 __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800
 kvfree+0x46/0x50 mm/util.c:649
 device_release+0xa3/0x240 drivers/base/core.c:2436
 kobject_cleanup lib/kobject.c:681 [inline]
 kobject_release lib/kobject.c:712 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1c2/0x4d0 lib/kobject.c:729
 netdev_run_todo+0x762/0x1100 net/core/dev.c:10400
 default_device_exit_batch+0x456/0x5b0 net/core/dev.c:11392
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614
 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
 worker_thread+0x669/0x1090 kernel/workqueue.c:2537
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
 insert_work+0x48/0x350 kernel/workqueue.c:1361
 __queue_work+0x625/0x1120 kernel/workqueue.c:1524
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers+0xbc/0x4b0 kernel/time/timer.c:1746
 __run_timers kernel/time/timer.c:2022 [inline]
 __run_timers kernel/time/timer.c:1995 [inline]
 run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
 __do_softirq+0x1d4/0x905 kernel/softirq.c:571

Second to last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
 insert_work+0x48/0x350 kernel/workqueue.c:1361
 __queue_work+0x625/0x1120 kernel/workqueue.c:1524
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers+0xbc/0x4b0 kernel/time/timer.c:1746
 __run_timers kernel/time/timer.c:2022 [inline]
 __run_timers kernel/time/timer.c:1995 [inline]
 run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
 __do_softirq+0x1d4/0x905 kernel/softirq.c:571

The buggy address belongs to the object at ffff888023208000
 which belongs to the cache kmalloc-cg-8k of size 8192
The buggy address is located 5376 bytes inside of
 freed 8192-byte region [ffff888023208000, ffff88802320a000)

The buggy address belongs to the physical page:
page:ffffea00008c8200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23208
head:ffffea00008c8200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffff88801244f640 dead000000000122 0000000000000000
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 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5025, tgid 5025 (syz-executor.2), ts 74012102731, free_ts 55677598068
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2db/0x350 mm/page_alloc.c:2546
 prep_new_page mm/page_alloc.c:2553 [inline]
 get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4326
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:5592
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2277
 alloc_slab_page mm/slub.c:1851 [inline]
 allocate_slab+0x25f/0x390 mm/slub.c:1998
 new_slab mm/slub.c:2051 [inline]
 ___slab_alloc+0xa91/0x1400 mm/slub.c:3193
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
 __slab_alloc_node mm/slub.c:3345 [inline]
 slab_alloc_node mm/slub.c:3442 [inline]
 __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:965 [inline]
 __kmalloc_node+0x51/0x1a0 mm/slab_common.c:973
 kmalloc_node include/linux/slab.h:580 [inline]
 kvmalloc_node+0x76/0x1a0 mm/util.c:603
 kvmalloc include/linux/slab.h:698 [inline]
 kvzalloc include/linux/slab.h:706 [inline]
 alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10626
 rtnl_create_link+0xbeb/0xee0 net/core/rtnetlink.c:3315
 rtnl_newlink_create net/core/rtnetlink.c:3433 [inline]
 __rtnl_newlink+0xfd4/0x1840 net/core/rtnetlink.c:3660
 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3673
 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6395
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1454 [inline]
 free_pcp_prepare+0x5da/0xa60 mm/page_alloc.c:1504
 free_unref_page_prepare mm/page_alloc.c:3388 [inline]
 free_unref_page+0x1d/0x490 mm/page_alloc.c:3483
 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook mm/slab.h:710 [inline]
 slab_alloc_node mm/slub.c:3452 [inline]
 kmem_cache_alloc_node+0x185/0x3e0 mm/slub.c:3497
 __alloc_skb+0x288/0x330 net/core/skbuff.c:644
 alloc_skb include/linux/skbuff.h:1288 [inline]
 alloc_skb_with_frags+0x9a/0x6c0 net/core/skbuff.c:6370
 sock_alloc_send_pskb+0x7a7/0x930 net/core/sock.c:2729
 unix_dgram_sendmsg+0x41b/0x1950 net/unix/af_unix.c:1944
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 sock_write_iter+0x295/0x3d0 net/socket.c:1140
 call_write_iter include/linux/fs.h:1854 [inline]
 do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735
 do_iter_write+0x185/0x7e0 fs/read_write.c:860
 vfs_writev+0x1aa/0x670 fs/read_write.c:933

Memory state around the buggy address:
 ffff888023209400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888023209480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888023209500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888023209580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888023209600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
   0:	38 ed                	cmp    %ch,%ch
   2:	0f 83 23 02 00 00    	jae    0x22b
   8:	e8 3e 58 87 f7       	callq  0xf787584b
   d:	48 8b 44 24 38       	mov    0x38(%rsp),%rax
  12:	45 0f b6 ed          	movzbl %r13b,%r13d
  16:	49 c1 e5 03          	shl    $0x3,%r13
  1a:	4a 8d 1c 28          	lea    (%rax,%r13,1),%rbx
  1e:	48 89 d8             	mov    %rbx,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
* 2a:	0f 85 0c 11 00 00    	jne    0x113c <-- trapping instruction
  30:	48 8b 44 24 50       	mov    0x50(%rsp),%rax
  35:	48 8b 1b             	mov    (%rbx),%rbx
  38:	80 38 00             	cmpb   $0x0,(%rax)
  3b:	0f                   	.byte 0xf
  3c:	85 08                	test   %ecx,(%rax)
  3e:	11 00                	adc    %eax,(%rax)