==================================================================
BUG: KASAN: use-after-free in hlist_add_head include/linux/list.h:930 [inline]
BUG: KASAN: use-after-free in enqueue_timer+0xa6/0x480 kernel/time/timer.c:611
Write of size 8 at addr ffff88812ea9ca00 by task kworker/0:7/1802

CPU: 0 PID: 1802 Comm: kworker/0:7 Not tainted 6.1.118-syzkaller-00021-gd12538e9da37 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: wg-crypt-wg0 wg_packet_tx_worker
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:427
 kasan_report+0x13c/0x170 mm/kasan/report.c:531
 __asan_report_store8_noabort+0x17/0x20 mm/kasan/report_generic.c:356
 hlist_add_head include/linux/list.h:930 [inline]
 enqueue_timer+0xa6/0x480 kernel/time/timer.c:611
 internal_add_timer kernel/time/timer.c:640 [inline]
 __mod_timer+0x8d3/0xcf0 kernel/time/timer.c:1121
 mod_timer+0x1f/0x30 kernel/time/timer.c:1172
 mod_peer_timer drivers/net/wireguard/timers.c:37 [inline]
 wg_timers_any_authenticated_packet_traversal+0x136/0x1a0 drivers/net/wireguard/timers.c:215
 wg_packet_create_data_done drivers/net/wireguard/send.c:247 [inline]
 wg_packet_tx_worker+0x16a/0x520 drivers/net/wireguard/send.c:276
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Allocated by task 25870:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc+0xb4/0x1e0 mm/slab_common.c:951
 kmalloc include/linux/slab.h:562 [inline]
 kzalloc include/linux/slab.h:693 [inline]
 hci_alloc_dev_priv+0x27/0x1c00 net/bluetooth/hci_core.c:2435
 hci_alloc_dev include/net/bluetooth/hci_core.h:1484 [inline]
 hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:636 [inline]
 hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:712 [inline]
 hci_uart_tty_ioctl+0x401/0xa70 drivers/bluetooth/hci_ldisc.c:765
 tty_ioctl+0x903/0xc50 drivers/tty/tty_io.c:2785
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x114/0x190 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 25869:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1745 [inline]
 slab_free_freelist_hook mm/slub.c:1771 [inline]
 slab_free mm/slub.c:3686 [inline]
 __kmem_cache_free+0x21d/0x410 mm/slub.c:3702
 kfree+0x7a/0xf0 mm/slab_common.c:990
 hci_release_dev+0x14d3/0x1640 net/bluetooth/hci_core.c:2763
 bt_host_release+0x83/0xa0 net/bluetooth/hci_sysfs.c:92
 device_release+0x95/0x1c0
 kobject_cleanup lib/kobject.c:681 [inline]
 kobject_release lib/kobject.c:712 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x178/0x260 lib/kobject.c:729
 put_device+0x1f/0x30 drivers/base/core.c:3805
 hci_free_dev+0x1c/0x20 net/bluetooth/hci_core.c:2558
 hci_uart_tty_close+0x1b9/0x240 drivers/bluetooth/hci_ldisc.c:552
 tty_ldisc_close drivers/tty/tty_ldisc.c:456 [inline]
 tty_ldisc_kill+0x10b/0x1f0 drivers/tty/tty_ldisc.c:608
 tty_ldisc_release+0x195/0x1f0 drivers/tty/tty_ldisc.c:776
 tty_release_struct+0x2a/0xe0 drivers/tty/tty_io.c:1689
 tty_release+0xd14/0xf70 drivers/tty/tty_io.c:1860
 __fput+0x1e5/0x870 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x24d/0x2e0 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x94/0xa0 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 insert_work+0x56/0x310 kernel/workqueue.c:1368
 __queue_work+0x9b6/0xd70 kernel/workqueue.c:1527
 queue_work_on+0x105/0x170 kernel/workqueue.c:1555
 queue_work include/linux/workqueue.h:510 [inline]
 hci_cmd_timeout+0x199/0x200 net/bluetooth/hci_core.c:1468
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Second to last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 insert_work+0x56/0x310 kernel/workqueue.c:1368
 __queue_work+0x9b6/0xd70 kernel/workqueue.c:1527
 delayed_work_timer_fn+0x61/0x80 kernel/workqueue.c:1653
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1510
 expire_timers kernel/time/timer.c:1550 [inline]
 __run_timers+0x756/0xa10 kernel/time/timer.c:1826
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1839
 handle_softirqs+0x1db/0x650 kernel/softirq.c:617
 __do_softirq kernel/softirq.c:655 [inline]
 invoke_softirq kernel/softirq.c:472 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:704
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:716
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691

The buggy address belongs to the object at ffff88812ea9c000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 2560 bytes inside of
 8192-byte region [ffff88812ea9c000, ffff88812ea9e000)

The buggy address belongs to the physical page:
page:ffffea0004baa600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12ea98
head:ffffea0004baa600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043500
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), pid 25836, tgid 25835 (syz.7.7031), ts 1744671289752, free_ts 1743998341863
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597
 get_page_from_freelist+0x2f41/0x2fc0 mm/page_alloc.c:4462
 __alloc_pages+0x234/0x610 mm/page_alloc.c:5759
 alloc_slab_page+0x6c/0xf0
 allocate_slab mm/slub.c:1962 [inline]
 new_slab+0x90/0x3e0 mm/slub.c:2015
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203
 __slab_alloc+0x5d/0xa0 mm/slub.c:3302
 slab_alloc_node mm/slub.c:3387 [inline]
 __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc_node+0xa3/0x1e0 mm/slab_common.c:945
 kmalloc_node include/linux/slab.h:583 [inline]
 kvmalloc_node+0x221/0x640 mm/util.c:592
 kvmalloc include/linux/slab.h:710 [inline]
 f2fs_kvmalloc fs/f2fs/f2fs.h:3381 [inline]
 f2fs_kvzalloc fs/f2fs/f2fs.h:3387 [inline]
 build_sit_info fs/f2fs/segment.c:4327 [inline]
 f2fs_build_segment_manager+0xf8a/0x2a10 fs/f2fs/segment.c:5217
 f2fs_fill_super+0x4ff3/0x6dc0 fs/f2fs/super.c:4451
 mount_bdev+0x282/0x3b0 fs/super.c:1445
 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4739
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:632
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1498 [inline]
 free_pcp_prepare mm/page_alloc.c:1572 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3511
 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3607
 free_the_page mm/page_alloc.c:798 [inline]
 free_compound_page+0x9d/0xd0 mm/page_alloc.c:821
 destroy_large_folio+0x56/0x90 mm/page_alloc.c:858
 __folio_put_large mm/swap.c:118 [inline]
 __folio_put+0xcf/0xe0 mm/swap.c:126
 folio_put include/linux/mm.h:1431 [inline]
 put_page include/linux/mm.h:1483 [inline]
 __skb_frag_unref include/linux/skbuff.h:3455 [inline]
 skb_release_data+0x3c1/0x840 net/core/skbuff.c:785
 skb_release_all net/core/skbuff.c:856 [inline]
 __kfree_skb net/core/skbuff.c:870 [inline]
 skb_attempt_defer_free+0x293/0x400 net/core/skbuff.c:6676
 tcp_eat_recv_skb net/ipv4/tcp.c:1643 [inline]
 tcp_recvmsg_locked+0x1532/0x24c0 net/ipv4/tcp.c:2633
 tcp_recvmsg+0x258/0x920 net/ipv4/tcp.c:2679
 inet_recvmsg+0x14e/0x500 net/ipv4/af_inet.c:871
 sock_recvmsg_nosec net/socket.c:1020 [inline]
 sock_recvmsg net/socket.c:1038 [inline]
 sock_read_iter+0x3b2/0x4b0 net/socket.c:1111
 call_read_iter include/linux/fs.h:2268 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x801/0xae0 fs/read_write.c:470
 ksys_read+0x199/0x2c0 fs/read_write.c:613
 __do_sys_read fs/read_write.c:623 [inline]
 __se_sys_read fs/read_write.c:621 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:621
 x64_sys_call+0x28/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81

Memory state around the buggy address:
 ffff88812ea9c900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88812ea9c980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88812ea9ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88812ea9ca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88812ea9cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================