================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0x2f/0x120 lib/list_debug.c:46 Read of size 8 at addr ffff888112234608 by task kworker/0:1/15 CPU: 0 PID: 15 Comm: kworker/0:1 Tainted: G W 5.10.226-syzkaller-00001-g6a01908517df #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 16844: 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 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu kernel/rcu/tree.c:2976 [inline] call_rcu+0x135/0x11f0 kernel/rcu/tree.c:3050 nf_hook_entries_free net/netfilter/core.c:88 [inline] __nf_register_net_hook+0x634/0x7c0 net/netfilter/core.c:419 nf_register_net_hook+0xb6/0x190 net/netfilter/core.c:536 nf_register_net_hooks+0x44/0x1b0 net/netfilter/core.c:552 ipt_register_table+0x20d/0x4a0 net/ipv4/netfilter/ip_tables.c:1756 iptable_mangle_table_init+0x7b/0xa0 net/ipv4/netfilter/iptable_mangle.c:97 xt_find_table_lock+0x24a/0x3e0 net/netfilter/x_tables.c:1219 xt_request_find_table_lock+0x27/0xf0 net/netfilter/x_tables.c:1249 get_info net/ipv4/netfilter/ip_tables.c:964 [inline] do_ipt_get_ctl+0x871/0x1880 net/ipv4/netfilter/ip_tables.c:1660 nf_getsockopt+0x26c/0x290 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x1539/0x2160 net/ipv4/ip_sockglue.c:1797 tcp_getsockopt+0x216/0x4a10 net/ipv4/tcp.c:4047 sock_common_getsockopt+0x99/0xb0 net/core/sock.c:3290 __sys_getsockopt+0x298/0x470 net/socket.c:2187 __do_sys_getsockopt net/socket.c:2202 [inline] __se_sys_getsockopt net/socket.c:2199 [inline] __x64_sys_getsockopt+0xbf/0xd0 net/socket.c:2199 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff888112234600 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 8 bytes inside of 64-byte region [ffff888112234600, ffff888112234640) The buggy address belongs to the page: page:ffffea0004488d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x112234 flags: 0x4000000000000200(slab) raw: 4000000000000200 ffffea00043f8d80 0000000900000009 ffff888100043800 raw: 0000000000000000 0000000000200020 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 108, ts 4540428178, free_ts 0 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] kmem_cache_alloc_trace+0x1bd/0x2e0 mm/slub.c:2972 kmalloc include/linux/slab.h:552 [inline] kernfs_get_open_node fs/kernfs/file.c:552 [inline] kernfs_fop_open+0x7fa/0xab0 fs/kernfs/file.c:698 do_dentry_open+0x7c1/0x10d0 fs/open.c:819 vfs_open+0x73/0x80 fs/open.c:942 do_open fs/namei.c:3391 [inline] path_openat+0x2660/0x3000 fs/namei.c:3509 do_filp_open+0x21c/0x460 fs/namei.c:3536 do_sys_openat2+0x13f/0x710 fs/open.c:1217 do_sys_open fs/open.c:1233 [inline] __do_sys_openat fs/open.c:1249 [inline] __se_sys_openat fs/open.c:1244 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1244 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb page_owner free stack trace missing Memory state around the buggy address: ffff888112234500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ffff888112234580: 00 00 00 00 00 00 00 02 fc fc fc fc fc fc fc fc >ffff888112234600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff888112234680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888112234700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ================================================================== general protection fault, probably for non-canonical address 0xf29ffc5820000001: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x950002c100000008-0x950002c10000000f] CPU: 0 PID: 15 Comm: kworker/0:1 Tainted: G B W 5.10.226-syzkaller-00001-g6a01908517df #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 9c 9a 51 ff 49 8b 17 4c 39 f2 75 RSP: 0018:ffffc900000f7c20 EFLAGS: 00010a03 RAX: 12a0005820000001 RBX: ffff8881085e9a00 RCX: ffffffff8256ad19 RDX: dead000000000122 RSI: 0000000000000286 RDI: ffff888112234600 RBP: ffffc900000f7c40 R08: ffffffff813e2a7b R09: 0000000000000003 R10: fffffbfff0e10e48 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff888112234600 R14: ffff888112234600 R15: 950002c10000000f FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c316989 CR3: 000000000660f000 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 c3d9898eca5d0b03 ]--- 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 9c 9a 51 ff 49 8b 17 4c 39 f2 75 RSP: 0018:ffffc900000f7c20 EFLAGS: 00010a03 RAX: 12a0005820000001 RBX: ffff8881085e9a00 RCX: ffffffff8256ad19 RDX: dead000000000122 RSI: 0000000000000286 RDI: ffff888112234600 RBP: ffffc900000f7c40 R08: ffffffff813e2a7b R09: 0000000000000003 R10: fffffbfff0e10e48 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff888112234600 R14: ffff888112234600 R15: 950002c10000000f FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c316989 CR3: 000000000660f000 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 9c 9a 51 ff call 0xff519ad4 38: 49 8b 17 mov (%r15),%rdx 3b: 4c 39 f2 cmp %r14,%rdx 3e: 75 .byte 0x75