================================================================== 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_ipmac_gc_test net/netfilter/ipset/ip_set_bitmap_ipmac.c:102 [inline] BUG: KASAN: slab-out-of-bounds in bitmap_ipmac_gc+0x119/0x590 net/netfilter/ipset/ip_set_bitmap_gen.h:277 Read of size 8 at addr ffff88809e8bc780 by task kworker/u4:10/9832 CPU: 1 PID: 9832 Comm: kworker/u4:10 Not tainted 5.5.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net 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_ipmac_gc_test net/netfilter/ipset/ip_set_bitmap_ipmac.c:102 [inline] bitmap_ipmac_gc+0x119/0x590 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:should_resched arch/x86/include/asm/preempt.h:102 [inline] RIP: 0010:__local_bh_enable_ip+0x18e/0x270 kernel/softirq.c:196 Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 df 00 00 00 48 83 3d 27 ee 4b 08 00 0f 84 8f 00 00 00 fb 66 0f 1f 44 00 00 <65> 8b 05 f3 d8 ba 7e 85 c0 74 7f 5b 41 5c 41 5d 5d c3 80 3d 9c 72 RSP: 0018:ffffc90001b67b08 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1326675 RBX: 0000000000000200 RCX: 0000000000000007 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff888064204d14 RBP: ffffc90001b67b20 R08: 1ffffffff165e79d R09: fffffbfff165e79e R10: fffffbfff165e79d R11: ffffffff8b2f3cef R12: ffffffff865ad57c R13: ffff888064204480 R14: 0000000000000001 R15: dffffc0000000000 local_bh_enable include/linux/bottom_half.h:32 [inline] get_next_corpse net/netfilter/nf_conntrack_core.c:2012 [inline] nf_ct_iterate_cleanup+0x212/0x4e0 net/netfilter/nf_conntrack_core.c:2035 nf_conntrack_cleanup_net_list+0x7d/0x250 net/netfilter/nf_conntrack_core.c:2222 nf_conntrack_pernet_exit+0x165/0x1b0 net/netfilter/nf_conntrack_standalone.c:1154 ops_exit_list.isra.0+0x10c/0x160 net/core/net_namespace.c:175 cleanup_net+0x538/0xaf0 net/core/net_namespace.c:597 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 12734: 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_ipmac net/netfilter/ipset/ip_set_bitmap_ipmac.c:302 [inline] bitmap_ipmac_create+0x4e8/0xa00 net/netfilter/ipset/ip_set_bitmap_ipmac.c:365 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+0x58c/0x7d0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:659 ____sys_sendmsg+0x753/0x880 net/socket.c:2330 ___sys_sendmsg+0x100/0x170 net/socket.c:2384 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2424 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 11574: 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 tomoyo_path_perm+0x24e/0x430 security/tomoyo/file.c:842 tomoyo_path_unlink+0x9b/0xe0 security/tomoyo/tomoyo.c:156 security_path_unlink+0xfa/0x160 security/security.c:1044 do_unlinkat+0x3b7/0x6d0 fs/namei.c:4000 __do_sys_unlink fs/namei.c:4050 [inline] __se_sys_unlink fs/namei.c:4048 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4048 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 ffff88809e8bc780 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff88809e8bc780, ffff88809e8bc7a0) The buggy address belongs to the page: page:ffffea00027a2f00 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809e8bcfc1 raw: 00fffe0000000200 ffffea00029bbd88 ffffea0002a2ffc8 ffff8880aa4001c0 raw: ffff88809e8bcfc1 ffff88809e8bc000 0000000100000036 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809e8bc680: 00 04 fc fc fc fc fc fc 00 04 fc fc fc fc fc fc ffff88809e8bc700: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff88809e8bc780: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff88809e8bc800: 00 01 fc fc fc fc fc fc fb fb fb fb fc fc fc fc ffff88809e8bc880: 00 fc fc fc fc fc fc fc 00 07 fc fc fc fc fc fc ==================================================================