================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0x2f/0x120 lib/list_debug.c:46 Read of size 8 at addr ffff8881160f3788 by task kworker/0:1/15 CPU: 0 PID: 15 Comm: kworker/0:1 Not tainted 5.10.226-syzkaller-00184-g139a6bb26d9d #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:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:452 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 __list_del_entry_valid+0x2f/0x120 lib/list_debug.c:46 __list_del_entry include/linux/list.h:132 [inline] list_del_init include/linux/list.h:204 [inline] binder_dequeue_work_head_ilocked drivers/android/binder.c:515 [inline] binder_release_work+0xcd/0x680 drivers/android/binder.c:5126 binder_deferred_release drivers/android/binder.c:6278 [inline] binder_deferred_func+0x1847/0x1bc0 drivers/android/binder.c:6313 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447 kthread+0x34b/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Allocated by task 1366: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:430 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:509 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518 kasan_kmalloc include/linux/kasan.h:254 [inline] kmem_cache_alloc_trace+0x18a/0x2e0 mm/slub.c:2974 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:664 [inline] binder_request_freeze_notification drivers/android/binder.c:3867 [inline] binder_thread_write+0x9ce/0x6c70 drivers/android/binder.c:4495 binder_ioctl_write_read+0x216/0x6a80 drivers/android/binder.c:5411 binder_ioctl+0x314/0x1e00 drivers/android/binder.c:5727 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0x114/0x190 fs/ioctl.c:739 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb Freed by task 15: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:362 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370 kasan_slab_free include/linux/kasan.h:220 [inline] slab_free_hook mm/slub.c:1595 [inline] slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621 slab_free mm/slub.c:3203 [inline] kfree+0xc3/0x270 mm/slub.c:4191 binder_free_ref+0x128/0x260 drivers/android/binder.c:1453 binder_deferred_release drivers/android/binder.c:6273 [inline] binder_deferred_func+0x171c/0x1bc0 drivers/android/binder.c:6313 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447 kthread+0x34b/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff8881160f3780 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 8 bytes inside of 64-byte region [ffff8881160f3780, ffff8881160f37c0) The buggy address belongs to the page: page:ffffea0004583cc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1160f3 flags: 0x4000000000000200(slab) raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100043800 raw: 0000000000000000 0000000080200020 00000001ffffffff 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 530, ts 33194778005, free_ts 31143928891 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x166/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348 allocate_slab mm/slub.c:1808 [inline] new_slab+0x80/0x400 mm/slub.c:1869 new_slab_objects mm/slub.c:2627 [inline] ___slab_alloc+0x302/0x4b0 mm/slub.c:2791 __slab_alloc+0x63/0xa0 mm/slub.c:2831 slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2955 [inline] __kmalloc+0x204/0x330 mm/slub.c:4029 kmalloc include/linux/slab.h:557 [inline] kzalloc include/linux/slab.h:664 [inline] kobject_get_path+0xbc/0x1f0 lib/kobject.c:184 kobject_uevent_env+0x27f/0x700 lib/kobject_uevent.c:544 kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:657 netdev_queue_add_kobject net/core/net-sysfs.c:1660 [inline] netdev_queue_update_kobjects+0x184/0x390 net/core/net-sysfs.c:1694 register_queue_kobjects net/core/net-sysfs.c:1755 [inline] netdev_register_kobject+0x270/0x320 net/core/net-sysfs.c:2001 register_netdevice+0xe9b/0x13f0 net/core/dev.c:10036 register_netdev+0x3c/0x50 net/core/dev.c:10160 ip6gre_init_net+0x253/0x320 net/ipv6/ip6_gre.c:1627 ops_init+0x1cd/0x4a0 net/core/net_namespace.c:144 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1349 [inline] __free_pages_ok+0x82c/0x850 mm/page_alloc.c:1629 free_the_page+0x76/0x370 mm/page_alloc.c:5409 __free_pages+0x67/0xc0 mm/page_alloc.c:5418 __free_slab+0xcf/0x190 mm/slub.c:1894 free_slab mm/slub.c:1909 [inline] discard_slab+0x29/0x40 mm/slub.c:1915 __slab_free+0x30d/0x3a0 mm/slub.c:3131 do_slab_free mm/slub.c:3191 [inline] ___cache_free+0x111/0x130 mm/slub.c:3210 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x47/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583 slab_alloc_node mm/slub.c:2947 [inline] slab_alloc mm/slub.c:2955 [inline] __kmalloc+0x183/0x330 mm/slub.c:4029 __kmalloc_node include/linux/slab.h:418 [inline] kmalloc_node include/linux/slab.h:575 [inline] __vmalloc_area_node mm/vmalloc.c:2513 [inline] __vmalloc_node_range+0x2a9/0x7c0 mm/vmalloc.c:2622 __vmalloc_node mm/vmalloc.c:2682 [inline] vzalloc+0x78/0x90 mm/vmalloc.c:2735 alloc_counters+0x69/0x500 net/ipv4/netfilter/ip_tables.c:800 Memory state around the buggy address: ffff8881160f3680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8881160f3700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8881160f3780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8881160f3800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8881160f3880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ================================================================== general protection fault, probably for non-canonical address 0xf79ffc3b40000001: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0xbd0001da00000008-0xbd0001da0000000f] CPU: 0 PID: 15 Comm: kworker/0:1 Tainted: G B 5.10.226-syzkaller-00184-g139a6bb26d9d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events binder_deferred_func RIP: 0010:__list_del_entry_valid+0x75/0x120 lib/list_debug.c:59 Code: 1e 48 85 db 74 68 4d 85 ff 74 74 48 ba 00 01 00 00 00 00 ad de 48 39 d3 74 76 48 83 c2 22 49 39 d7 74 7e 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 1c 97 51 ff 49 8b 17 4c 39 f2 75 RSP: 0018:ffffc900000f7c20 EFLAGS: 00010a03 RAX: 17a0003b40000001 RBX: ffff888102daae00 RCX: ffffffff8256bf49 RDX: dead000000000122 RSI: 0000000000000286 RDI: ffff8881160f3780 RBP: ffffc900000f7c40 R08: ffffffff813e2a7b R09: 0000000000000003 R10: fffffbfff0e10e48 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff8881160f3780 R14: ffff8881160f3780 R15: bd0001da0000000f FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffd88f0000 CR3: 0000000125143000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:132 [inline] list_del_init include/linux/list.h:204 [inline] binder_dequeue_work_head_ilocked drivers/android/binder.c:515 [inline] binder_release_work+0xcd/0x680 drivers/android/binder.c:5126 binder_deferred_release drivers/android/binder.c:6278 [inline] binder_deferred_func+0x1847/0x1bc0 drivers/android/binder.c:6313 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447 kthread+0x34b/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Modules linked in: ---[ end trace 9e9a61afd6b6533c ]--- RIP: 0010:__list_del_entry_valid+0x75/0x120 lib/list_debug.c:59 Code: 1e 48 85 db 74 68 4d 85 ff 74 74 48 ba 00 01 00 00 00 00 ad de 48 39 d3 74 76 48 83 c2 22 49 39 d7 74 7e 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 1c 97 51 ff 49 8b 17 4c 39 f2 75 RSP: 0018:ffffc900000f7c20 EFLAGS: 00010a03 RAX: 17a0003b40000001 RBX: ffff888102daae00 RCX: ffffffff8256bf49 RDX: dead000000000122 RSI: 0000000000000286 RDI: ffff8881160f3780 RBP: ffffc900000f7c40 R08: ffffffff813e2a7b R09: 0000000000000003 R10: fffffbfff0e10e48 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff8881160f3780 R14: ffff8881160f3780 R15: bd0001da0000000f FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffd88f0000 CR3: 0000000125143000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 48 85 db test %rbx,%rbx 3: 74 68 je 0x6d 5: 4d 85 ff test %r15,%r15 8: 74 74 je 0x7e a: 48 ba 00 01 00 00 00 movabs $0xdead000000000100,%rdx 11: 00 ad de 14: 48 39 d3 cmp %rdx,%rbx 17: 74 76 je 0x8f 19: 48 83 c2 22 add $0x22,%rdx 1d: 49 39 d7 cmp %rdx,%r15 20: 74 7e je 0xa0 22: 4c 89 f8 mov %r15,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ff mov %r15,%rdi 33: e8 1c 97 51 ff call 0xff519754 38: 49 8b 17 mov (%r15),%rdx 3b: 4c 39 f2 cmp %r14,%rdx 3e: 75 .byte 0x75