================================================================== BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x14c/0x1c0 lib/list_debug.c:49 Read of size 8 at addr ffff888012fd1708 by task kworker/0:1/9 CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.12.0-rc1-syzkaller-00113-g8c245fe7dde3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events binder_deferred_func Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 __list_del_entry_valid_or_report+0x14c/0x1c0 lib/list_debug.c:49 __list_del_entry_valid include/linux/list.h:124 [inline] __list_del_entry include/linux/list.h:215 [inline] list_del_init include/linux/list.h:287 [inline] binder_dequeue_work_head_ilocked drivers/android/binder.c:540 [inline] binder_release_work+0x9b/0x490 drivers/android/binder.c:5110 binder_deferred_release drivers/android/binder.c:6261 [inline] binder_deferred_func+0xe6e/0x12e0 drivers/android/binder.c:6296 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 9848: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] binder_request_freeze_notification drivers/android/binder.c:3855 [inline] binder_thread_write+0xe19/0x4c60 drivers/android/binder.c:4485 binder_ioctl_write_read drivers/android/binder.c:5387 [inline] binder_ioctl+0x265b/0x6fa0 drivers/android/binder.c:5718 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 9: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x14f/0x4b0 mm/slub.c:4728 binder_free_ref drivers/android/binder.c:1355 [inline] binder_deferred_release drivers/android/binder.c:6256 [inline] binder_deferred_func+0xdd7/0x12e0 drivers/android/binder.c:6296 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff888012fd1700 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 8 bytes inside of freed 64-byte region [ffff888012fd1700, ffff888012fd1740) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12fd1 ksm flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801b0418c0 ffffea00009de840 dead000000000007 raw: 0000000000000000 0000000000200020 00000001f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5221, tgid 5221 (syz-executor), ts 140970610796, free_ts 140903184150 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x101e/0x3070 mm/page_alloc.c:3457 __alloc_pages_noprof+0x223/0x25c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265 alloc_slab_page mm/slub.c:2413 [inline] allocate_slab mm/slub.c:2579 [inline] new_slab+0x2ba/0x3f0 mm/slub.c:2632 ___slab_alloc+0xdac/0x1880 mm/slub.c:3819 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __kmalloc_cache_node_noprof+0xf1/0x350 mm/slub.c:4304 kmalloc_node_noprof include/linux/slab.h:901 [inline] __get_vm_area_node+0xe1/0x2d0 mm/vmalloc.c:3106 __vmalloc_node_range_noprof+0x26a/0x15a0 mm/vmalloc.c:3788 __vmalloc_node_noprof mm/vmalloc.c:3893 [inline] vzalloc_noprof+0x6b/0x90 mm/vmalloc.c:3966 alloc_counters net/ipv4/netfilter/arp_tables.c:660 [inline] copy_entries_to_user net/ipv4/netfilter/arp_tables.c:681 [inline] get_entries net/ipv4/netfilter/arp_tables.c:867 [inline] do_arpt_get_ctl+0x67a/0x9a0 net/ipv4/netfilter/arp_tables.c:1461 nf_getsockopt+0x79/0xe0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x18e/0x1e0 net/ipv4/ip_sockglue.c:1777 tcp_getsockopt+0x9e/0x100 net/ipv4/tcp.c:4670 do_sock_getsockopt+0x3fe/0x800 net/socket.c:2391 page last free pid 5874 tgid 5873 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_folios+0x956/0x1310 mm/page_alloc.c:2686 folios_put_refs+0x551/0x750 mm/swap.c:1007 free_pages_and_swap_cache+0x45f/0x510 mm/swap_state.c:335 __tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu mm/mmu_gather.c:373 [inline] tlb_finish_mmu+0x168/0x7b0 mm/mmu_gather.c:465 exit_mmap+0x3df/0xb30 mm/mmap.c:1877 __mmput+0x12a/0x480 kernel/fork.c:1347 mmput+0x62/0x70 kernel/fork.c:1369 exit_mm kernel/exit.c:571 [inline] do_exit+0x9bf/0x2d70 kernel/exit.c:926 do_group_exit+0xd3/0x2a0 kernel/exit.c:1088 get_signal+0x25fb/0x2770 kernel/signal.c:2917 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888012fd1600: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff888012fd1680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888012fd1700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff888012fd1780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff888012fd1800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================