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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 ffff8880a974fcc0 by task syz-executor.0/10049

CPU: 0 PID: 10049 Comm: syz-executor.0 Not tainted 5.5.0-rc6-next-20200116-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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/0x32 mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:641
 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
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
RIP: 0010:lock_release+0x4c0/0x960 kernel/locking/lockdep.c:4505
Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 8c 03 00 00 48 83 3d f7 83 58 08 00 0f 84 7f 01 00 00 48 8b bd 48 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00
RSP: 0018:ffffc9000461f838 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff136774f RBX: 1ffff920008c3f0c RCX: 1ffff11009bd016a
RDX: dffffc0000000000 RSI: 1ffff11009bd0171 RDI: 0000000000000286
RBP: ffffc9000461f908 R08: 0000000000000002 R09: ffff88804de80b58
R10: fffffbfff154a5c8 R11: ffffffff8aa52e47 R12: ffff88804de802c0
R13: ffffffff81babe63 R14: ffffc9000461f8e0 R15: ffff88804de802c0
 rcu_lock_release include/linux/rcupdate.h:213 [inline]
 rcu_read_unlock include/linux/rcupdate.h:655 [inline]
 __unlock_page_memcg+0x6b/0x100 mm/memcontrol.c:2019
 unlock_page_memcg+0x2c/0x40 mm/memcontrol.c:2028
 page_remove_file_rmap mm/rmap.c:1273 [inline]
 page_remove_rmap+0x60c/0x11d0 mm/rmap.c:1330
 zap_pte_range mm/memory.c:1080 [inline]
 zap_pmd_range mm/memory.c:1184 [inline]
 zap_pud_range mm/memory.c:1213 [inline]
 zap_p4d_range mm/memory.c:1234 [inline]
 unmap_page_range+0xdd5/0x2810 mm/memory.c:1255
 unmap_single_vma+0x19d/0x300 mm/memory.c:1300
 unmap_vmas+0x184/0x2f0 mm/memory.c:1332
 exit_mmap+0x2ba/0x530 mm/mmap.c:3145
 __mmput kernel/fork.c:1082 [inline]
 mmput+0x179/0x4d0 kernel/fork.c:1103
 exit_mm kernel/exit.c:485 [inline]
 do_exit+0xae4/0x2f80 kernel/exit.c:788
 do_group_exit+0x135/0x360 kernel/exit.c:899
 __do_sys_exit_group kernel/exit.c:910 [inline]
 __se_sys_exit_group kernel/exit.c:908 [inline]
 __x64_sys_exit_group+0x44/0x50 kernel/exit.c:908
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45b349
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fffd21fb468 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 000000000045b349
RDX: 0000000000414ec0 RSI: 0000000000000287 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000004 R09: 00007fffd21fb4c0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffd21fb4c0 R14: 0000000000000000 R15: 00007fffd21fb4d0

Allocated by task 9961:
 save_stack+0x23/0x90 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc mm/kasan/common.c:515 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:488
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529
 __do_kmalloc mm/slab.c:3656 [inline]
 __kmalloc+0x163/0x770 mm/slab.c:3665
 kmalloc include/linux/slab.h:560 [inline]
 kzalloc include/linux/slab.h:669 [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+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 9711:
 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:337 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:476
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:485
 __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_inode_getattr+0x1d/0x30 security/tomoyo/tomoyo.c:129
 security_inode_getattr+0xf2/0x150 security/security.c:1255
 vfs_getattr+0x25/0x70 fs/stat.c:117
 vfs_statx+0x15d/0x200 fs/stat.c:201
 vfs_fstatat include/linux/fs.h:3266 [inline]
 __do_sys_newfstatat+0xad/0x130 fs/stat.c:378
 __se_sys_newfstatat fs/stat.c:372 [inline]
 __x64_sys_newfstatat+0x97/0xf0 fs/stat.c:372
 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 ffff8880a974fcc0
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
 32-byte region [ffff8880a974fcc0, ffff8880a974fce0)
The buggy address belongs to the page:
page:ffffea0002a5d3c0 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880a974ffc1
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea000272b5c8 ffffea0002a1f448 ffff8880aa4001c0
raw: ffff8880a974ffc1 ffff8880a974f000 000000010000003f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a974fb80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8880a974fc00: 00 01 fc fc fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8880a974fc80: 00 03 fc fc fc fc fc fc 04 fc fc fc fc fc fc fc
                                           ^
 ffff8880a974fd00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8880a974fd80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
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