================================================================== 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 ffff88805eddff88 by task kworker/0:2/1284 CPU: 0 UID: 0 PID: 1284 Comm: kworker/0:2 Not tainted 6.12.0-rc1-syzkaller-00114-g3840cbe24cf0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 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+0x958/0x1b30 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 7342: 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+0x268b/0x7050 drivers/android/binder.c:5718 compat_ptr_ioctl+0x6b/0xa0 fs/ioctl.c:946 __do_compat_sys_ioctl+0x259/0x2b0 fs/ioctl.c:1007 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Freed by task 1284: 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+0x958/0x1b30 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 ffff88805eddff80 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 8 bytes inside of freed 64-byte region [ffff88805eddff80, ffff88805eddffc0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5eddf ksm flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff88801ac428c0 ffffea0001778a80 dead000000000003 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5357, tgid 5357 (syz-executor), ts 48247714963, free_ts 0 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+0xd1d/0x16f0 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] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x379/0x410 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] kobject_get_path+0xcb/0x230 lib/kobject.c:161 kobject_uevent_env+0x289/0x1670 lib/kobject_uevent.c:545 __kobject_del+0x168/0x1f0 lib/kobject.c:601 kobject_cleanup lib/kobject.c:680 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x327/0x5a0 lib/kobject.c:737 netdev_queue_update_kobjects+0x432/0x5b0 net/core/net-sysfs.c:1857 netif_set_real_num_tx_queues+0x168/0x880 net/core/dev.c:2944 veth_init_queues+0xe1/0x190 drivers/net/veth.c:1756 veth_newlink+0x630/0x9e0 drivers/net/veth.c:1879 page_owner free stack trace missing Memory state around the buggy address: ffff88805eddfe80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88805eddff00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88805eddff80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff88805ede0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805ede0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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