================================================================== BUG: KASAN: slab-out-of-bounds in instrument_copy_to_user include/linux/instrumented.h:118 [inline] BUG: KASAN: slab-out-of-bounds in _copy_to_user lib/usercopy.c:32 [inline] BUG: KASAN: slab-out-of-bounds in _copy_to_user+0xc7/0x150 lib/usercopy.c:26 Read of size 12 at addr ffff8880519ad9a0 by task syz-executor.2/30153 CPU: 0 PID: 30153 Comm: syz-executor.2 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:256 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_copy_to_user include/linux/instrumented.h:118 [inline] _copy_to_user lib/usercopy.c:32 [inline] _copy_to_user+0xc7/0x150 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:200 [inline] __htab_map_lookup_and_delete_batch+0xf19/0x1900 kernel/bpf/hashtab.c:1768 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4176 __sys_bpf+0x2706/0x5df0 kernel/bpf/syscall.c:4647 __do_sys_bpf kernel/bpf/syscall.c:4691 [inline] __se_sys_bpf kernel/bpf/syscall.c:4689 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4689 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f2d28b78739 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2d260ce188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f2d28c7d038 RCX: 00007f2d28b78739 RDX: 0000000000000038 RSI: 0000000020000280 RDI: 0000000000000019 RBP: 00007f2d28bd2cc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2d28c7d038 R13: 00007ffe52525b9f R14: 00007f2d260ce300 R15: 0000000000022000 Allocated by task 30153: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0xa4/0xd0 mm/kasan/common.c:522 kmalloc_node include/linux/slab.h:614 [inline] kvmalloc_node+0x61/0x120 mm/util.c:587 kvmalloc include/linux/mm.h:805 [inline] kvmalloc_array include/linux/mm.h:823 [inline] __htab_map_lookup_and_delete_batch+0x525/0x1900 kernel/bpf/hashtab.c:1647 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4176 __sys_bpf+0x2706/0x5df0 kernel/bpf/syscall.c:4647 __do_sys_bpf kernel/bpf/syscall.c:4691 [inline] __se_sys_bpf kernel/bpf/syscall.c:4689 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4689 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff8880519ad9a0 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 0 bytes inside of 16-byte region [ffff8880519ad9a0, ffff8880519ad9b0) The buggy address belongs to the page: page:ffffea0001466b40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x519ad flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000732c80 0000001d0000001d ffff888010c413c0 raw: 0000000000000000 0000000080800080 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 8454, ts 129156762448, free_ts 129145792762 prep_new_page mm/page_alloc.c:2436 [inline] get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4168 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5390 __alloc_pages_node include/linux/gfp.h:570 [inline] alloc_slab_page mm/slub.c:1693 [inline] allocate_slab+0x96/0x4b0 mm/slub.c:1831 new_slab mm/slub.c:1894 [inline] new_slab_objects mm/slub.c:2640 [inline] ___slab_alloc+0x473/0x7b0 mm/slub.c:2803 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2843 slab_alloc_node mm/slub.c:2925 [inline] __kmalloc_node+0x2df/0x380 mm/slub.c:4159 kmalloc_node include/linux/slab.h:614 [inline] kvmalloc_node+0x61/0x120 mm/util.c:587 xt_jumpstack_alloc net/netfilter/x_tables.c:1354 [inline] xt_replace_table+0x1a2/0x820 net/netfilter/x_tables.c:1393 __do_replace+0x1d7/0x890 net/ipv6/netfilter/ip6_tables.c:1083 do_replace net/ipv6/netfilter/ip6_tables.c:1156 [inline] do_ip6t_set_ctl+0x90d/0xb90 net/ipv6/netfilter/ip6_tables.c:1638 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x122/0x180 net/ipv6/ipv6_sockglue.c:1008 tcp_setsockopt+0x136/0x2530 net/ipv4/tcp.c:3658 __sys_setsockopt+0x2db/0x610 net/socket.c:2176 __do_sys_setsockopt net/socket.c:2187 [inline] __se_sys_setsockopt net/socket.c:2184 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2184 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1346 [inline] free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1397 free_unref_page_prepare mm/page_alloc.c:3332 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3411 __vunmap+0x783/0xb70 mm/vmalloc.c:2609 free_work+0x58/0x70 mm/vmalloc.c:82 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Memory state around the buggy address: ffff8880519ad880: 00 00 fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc ffff8880519ad900: 00 00 fc fc fb fb fc fc 00 00 fc fc 00 00 fc fc >ffff8880519ad980: fb fb fc fc 00 02 fc fc fb fb fc fc 00 00 fc fc ^ ffff8880519ada00: 00 00 fc fc 00 00 fc fc 00 00 fc fc fa fb fc fc ffff8880519ada80: 00 00 fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc ==================================================================