================================================================== BUG: KASAN: slab-out-of-bounds in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc_test net/netfilter/ipset/ip_set_bitmap_port.c:67 [inline] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc+0x112/0x4f0 net/netfilter/ipset/ip_set_bitmap_gen.h:277 Read of size 8 at addr ffff888096fef180 by task kworker/u4:3/167 CPU: 0 PID: 167 Comm: kworker/u4:3 Not tainted 5.5.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:639 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192 __kasan_check_read+0x11/0x20 mm/kasan/common.c:95 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] bitmap_port_gc_test net/netfilter/ipset/ip_set_bitmap_port.c:67 [inline] bitmap_port_gc+0x112/0x4f0 net/netfilter/ipset/ip_set_bitmap_gen.h:277 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:lock_acquire+0x20b/0x410 kernel/locking/lockdep.c:4487 Code: 94 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 d3 01 00 00 48 83 3d 89 4f 38 08 00 0f 84 53 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b RSP: 0018:ffffc90001657c80 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1326673 RBX: ffff8880a8c70340 RCX: ffffffff815a8920 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000282 RBP: ffffc90001657cc8 R08: 1ffffffff166159c R09: fffffbfff166159d R10: ffff8880a8c70c28 R11: ffff8880a8c70340 R12: ffffffff899a3e00 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002 rcu_lock_acquire include/linux/rcupdate.h:208 [inline] rcu_read_lock include/linux/rcupdate.h:617 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:407 [inline] batadv_nc_worker+0x117/0x760 net/batman-adv/network-coding.c:718 process_one_work+0x9af/0x1740 kernel/workqueue.c:2264 worker_thread+0x98/0xe40 kernel/workqueue.c:2410 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 10094: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x163/0x770 mm/slab.c:3665 kmalloc include/linux/slab.h:561 [inline] kzalloc include/linux/slab.h:670 [inline] ip_set_alloc+0x38/0x5e net/netfilter/ipset/ip_set_core.c:255 init_map_port net/netfilter/ipset/ip_set_bitmap_port.c:234 [inline] bitmap_port_create+0x3dc/0x7c0 net/netfilter/ipset/ip_set_bitmap_port.c:276 ip_set_create+0x6f1/0x1500 net/netfilter/ipset/ip_set_core.c:1111 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x1ba/0x460 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x59e/0x7e0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:672 ____sys_sendmsg+0x753/0x880 net/socket.c:2343 ___sys_sendmsg+0x100/0x170 net/socket.c:2397 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9563: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:335 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:474 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483 __cache_free mm/slab.c:3426 [inline] kfree+0x10a/0x2c0 mm/slab.c:3757 kvfree+0x61/0x70 mm/util.c:603 xt_free_table_info+0xba/0x180 net/netfilter/x_tables.c:1192 __do_replace+0x6ec/0x940 net/ipv4/netfilter/ip_tables.c:1087 do_replace net/ipv4/netfilter/ip_tables.c:1140 [inline] do_ipt_set_ctl+0x33a/0x4c2 net/ipv4/netfilter/ip_tables.c:1672 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1260 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:3158 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3152 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3149 __sys_setsockopt+0x261/0x4c0 net/socket.c:2130 __do_sys_setsockopt net/socket.c:2146 [inline] __se_sys_setsockopt net/socket.c:2143 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2143 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff888096fef180 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff888096fef180, ffff888096fef1a0) The buggy address belongs to the page: page:ffffea00025bfbc0 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff888096feffc1 raw: 00fffe0000000200 ffffea00027f0008 ffffea0002769188 ffff8880aa4001c0 raw: ffff888096feffc1 ffff888096fef000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888096fef080: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff888096fef100: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff888096fef180: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff888096fef200: 00 00 fc fc fc fc fc fc 05 fc fc fc fc fc fc fc ffff888096fef280: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc ==================================================================