================================================================== BUG: KASAN: slab-use-after-free in __list_del_entry_valid_or_report+0x2f/0x140 lib/list_debug.c:49 Read of size 8 at addr ffff888029762988 by task kworker/0:4/5271 CPU: 0 UID: 0 PID: 5271 Comm: kworker/0:4 Not tainted 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #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+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 __list_del_entry_valid_or_report+0x2f/0x140 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+0xc7/0x480 drivers/android/binder.c:5110 binder_deferred_release drivers/android/binder.c:6261 [inline] binder_deferred_func+0x1275/0x1460 drivers/android/binder.c:6296 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 6023: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4296 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 drivers/android/binder.c:4485 [inline] binder_ioctl_write_read+0xe7f/0xb560 drivers/android/binder.c:5387 binder_ioctl+0x436/0x1cc0 drivers/android/binder.c:5718 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5271: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 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+0x1a0/0x440 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+0x11df/0x1460 drivers/android/binder.c:6296 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/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 ffff888029762980 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 8 bytes inside of freed 64-byte region [ffff888029762980, ffff8880297629c0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29762 anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801ac418c0 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080200020 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 147, tgid 147 (kworker/u8:5), ts 56929291870, free_ts 56636932963 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3039/0x3180 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_node_track_caller_noprof+0x281/0x440 mm/slub.c:4284 kmemdup_noprof+0x2a/0x60 mm/util.c:133 sctp_addr_wq_mgmt+0x2f8/0x720 net/sctp/protocol.c:757 sctp_inet6addr_event+0x566/0x730 net/sctp/ipv6.c:94 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 atomic_notifier_call_chain+0xdb/0x180 kernel/notifier.c:231 ipv6_add_addr+0xde0/0x1090 net/ipv6/addrconf.c:1180 addrconf_add_linklocal+0x36c/0xa30 net/ipv6/addrconf.c:3317 page last free pid 5235 tgid 5235 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcd0/0xf00 mm/page_alloc.c:2638 __slab_free+0x31b/0x3d0 mm/slub.c:4491 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x1a6/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] fib_create_info+0xa49/0x24e0 net/ipv4/fib_semantics.c:1458 fib_table_insert+0x1f6/0x1f30 net/ipv4/fib_trie.c:1237 fib_magic+0x3d8/0x620 net/ipv4/fib_frontend.c:1104 fib_add_ifaddr+0x14c/0x5e0 net/ipv4/fib_frontend.c:1126 fib_inetaddr_event+0x167/0x1f0 net/ipv4/fib_frontend.c:1440 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:388 __inet_insert_ifa+0x9d4/0xc30 net/ipv4/devinet.c:571 inet_rtm_newaddr+0xc15/0x1b20 net/ipv4/devinet.c:982 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6646 Memory state around the buggy address: ffff888029762880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888029762900: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc >ffff888029762980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff888029762a00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff888029762a80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================