================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0x2f/0x120 lib/list_debug.c:46 Read of size 8 at addr ffff8881288c5308 by task kworker/0:0/32500 CPU: 0 PID: 32500 Comm: kworker/0:0 Not tainted 5.15.168-syzkaller-00719-g101e665d55a8 #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:88 [inline] dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 __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:5183 binder_deferred_release drivers/android/binder.c:6339 [inline] binder_deferred_func+0x1847/0x1bc0 drivers/android/binder.c:6374 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 5002: 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:433 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] kmem_cache_alloc_trace+0x115/0x210 mm/slub.c:3267 kmalloc include/linux/slab.h:603 [inline] kzalloc include/linux/slab.h:733 [inline] binder_request_freeze_notification drivers/android/binder.c:3895 [inline] binder_thread_write+0x9f5/0x6ec0 drivers/android/binder.c:4535 binder_ioctl_write_read+0x205/0x7300 drivers/android/binder.c:5470 binder_ioctl+0x371/0x2640 drivers/android/binder.c:5787 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0x114/0x190 fs/ioctl.c:860 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 32500: 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+0x126/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749 slab_free mm/slub.c:3519 [inline] kfree+0xc8/0x220 mm/slub.c:4579 binder_free_ref+0x128/0x260 drivers/android/binder.c:1465 binder_deferred_release drivers/android/binder.c:6334 [inline] binder_deferred_func+0x171c/0x1bc0 drivers/android/binder.c:6374 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu_common kernel/rcu/tree.c:3007 [inline] call_rcu+0x123/0x10b0 kernel/rcu/tree.c:3125 free_htab_elem+0x187/0x250 kernel/bpf/hashtab.c:881 htab_map_update_elem+0x5f3/0x9c0 kernel/bpf/hashtab.c:1121 bpf_map_update_value+0x224/0x3c0 kernel/bpf/syscall.c:223 generic_map_update_batch+0x53d/0x860 kernel/bpf/syscall.c:1401 bpf_map_do_batch+0x4c3/0x620 __sys_bpf+0x5dc/0x760 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4735 x64_sys_call+0x87f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu_common kernel/rcu/tree.c:3007 [inline] call_rcu+0x123/0x10b0 kernel/rcu/tree.c:3125 free_htab_elem+0x187/0x250 kernel/bpf/hashtab.c:881 htab_map_update_elem+0x5f3/0x9c0 kernel/bpf/hashtab.c:1121 bpf_map_update_value+0x224/0x3c0 kernel/bpf/syscall.c:223 generic_map_update_batch+0x53d/0x860 kernel/bpf/syscall.c:1401 bpf_map_do_batch+0x4c3/0x620 __sys_bpf+0x5dc/0x760 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4735 x64_sys_call+0x87f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff8881288c5300 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 8 bytes inside of 64-byte region [ffff8881288c5300, ffff8881288c5340) The buggy address belongs to the page: page:ffffea0004a23140 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1288c5 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100042780 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 293, ts 26114421588, free_ts 26114396488 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5779 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc_trace+0x142/0x210 mm/slub.c:3265 kmem_cache_alloc_node_trace include/linux/slab.h:491 [inline] kmalloc_node include/linux/slab.h:621 [inline] kzalloc_node include/linux/slab.h:744 [inline] __get_vm_area_node+0x117/0x360 mm/vmalloc.c:2432 __vmalloc_node_range+0xe2/0x8d0 mm/vmalloc.c:3051 __vmalloc_node mm/vmalloc.c:3151 [inline] vzalloc+0x78/0x90 mm/vmalloc.c:3221 alloc_counters+0x69/0x500 net/ipv4/netfilter/ip_tables.c:800 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:822 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1023 [inline] do_ipt_get_ctl+0xeac/0x1880 net/ipv4/netfilter/ip_tables.c:1669 nf_getsockopt+0x26c/0x290 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x153a/0x2160 net/ipv4/ip_sockglue.c:1797 tcp_getsockopt+0x249/0x7030 net/ipv4/tcp.c:4305 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534 free_unref_page+0xe8/0x750 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5855 __vunmap+0x7bc/0x8f0 mm/vmalloc.c:2652 __vfree mm/vmalloc.c:2700 [inline] vfree+0x7f/0xb0 mm/vmalloc.c:2731 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:867 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1023 [inline] do_ipt_get_ctl+0x11d3/0x1880 net/ipv4/netfilter/ip_tables.c:1669 nf_getsockopt+0x26c/0x290 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x153a/0x2160 net/ipv4/ip_sockglue.c:1797 tcp_getsockopt+0x249/0x7030 net/ipv4/tcp.c:4305 sock_common_getsockopt+0x99/0xb0 net/core/sock.c:3432 __sys_getsockopt+0x290/0x4f0 net/socket.c:2247 __do_sys_getsockopt net/socket.c:2262 [inline] __se_sys_getsockopt net/socket.c:2259 [inline] __x64_sys_getsockopt+0xbf/0xd0 net/socket.c:2259 x64_sys_call+0x1a9/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:56 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff8881288c5200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8881288c5280: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc >ffff8881288c5300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8881288c5380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8881288c5400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ================================================================== general protection fault, probably for non-canonical address 0xf3ebfc7480000fde: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x9f6003a400007ef0-0x9f6003a400007ef7] CPU: 0 PID: 32500 Comm: kworker/0:0 Tainted: G B 5.15.168-syzkaller-00719-g101e665d55a8 #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 7c 7d 48 ff 49 8b 17 4c 39 f2 75 RSP: 0018:ffffc90000b97c00 EFLAGS: 00010a07 RAX: 13ec007480000fde RBX: ffff8881077a7e00 RCX: ffffffff826a3f79 RDX: dead000000000122 RSI: 0000000000000282 RDI: ffff8881288c5300 RBP: ffffc90000b97c20 R08: ffffffff8141a3db R09: 0000000000000003 R10: fffffbfff0e9a84c R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff8881288c5300 R14: ffff8881288c5300 R15: 9f6003a400007ef4 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32314ff8 CR3: 0000000006a0f000 CR4: 00000000003506b0 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:5183 binder_deferred_release drivers/android/binder.c:6339 [inline] binder_deferred_func+0x1847/0x1bc0 drivers/android/binder.c:6374 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Modules linked in: ---[ end trace c59d32a32d25a81f ]--- 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 7c 7d 48 ff 49 8b 17 4c 39 f2 75 RSP: 0018:ffffc90000b97c00 EFLAGS: 00010a07 RAX: 13ec007480000fde RBX: ffff8881077a7e00 RCX: ffffffff826a3f79 RDX: dead000000000122 RSI: 0000000000000282 RDI: ffff8881288c5300 RBP: ffffc90000b97c20 R08: ffffffff8141a3db R09: 0000000000000003 R10: fffffbfff0e9a84c R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff8881288c5300 R14: ffff8881288c5300 R15: 9f6003a400007ef4 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32314ff8 CR3: 0000000006a0f000 CR4: 00000000003506b0 ---------------- 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 7c 7d 48 ff call 0xff487db4 38: 49 8b 17 mov (%r15),%rdx 3b: 4c 39 f2 cmp %r14,%rdx 3e: 75 .byte 0x75