================================================================== 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 ffff8880940b12c0 by task syz-executor771/9851 CPU: 0 PID: 9851 Comm: syz-executor771 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: __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_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:__d_lookup+0x0/0x750 fs/dcache.c:2340 Code: df e8 84 8d ee ff e9 e1 ec ff ff 48 8b bd 10 ff ff ff e8 d3 8c ee ff e9 72 ed ff ff e8 69 8d ee ff e9 15 ed ff ff 0f 1f 40 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 89 f3 48 83 ec 50 48 89 RSP: 0018:ffffc900034c7958 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88809508e140 RBX: ffffc900034c7a08 RCX: ffffffff81c272a7 RDX: 0000000000000000 RSI: ffffc900034c7be0 RDI: ffff8880912be040 RBP: ffffc900034c7a30 R08: ffff88809508e140 R09: ffffed1012a11c2d R10: ffffed1012a11c2c R11: ffff88809508e163 R12: ffffc900034c7bd0 R13: ffffc900034c7be0 R14: ffff8880912be040 R15: ffffc900034c7ae8 do_last fs/namei.c:3358 [inline] path_openat+0x457/0x34d0 fs/namei.c:3604 do_filp_open+0x192/0x260 fs/namei.c:3634 do_sys_openat2+0x633/0x840 fs/open.c:1151 do_sys_open+0xfc/0x190 fs/open.c:1167 ksys_open include/linux/syscalls.h:1387 [inline] __do_sys_open fs/open.c:1173 [inline] __se_sys_open fs/open.c:1171 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1171 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4011a0 Code: 01 f0 ff ff 0f 83 c0 0b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 2d 15 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 94 0b 00 00 c3 48 83 ec 08 e8 fa 00 00 00 RSP: 002b:00007ffdad8ab188 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffdad8ab1b4 RCX: 00000000004011a0 RDX: 00007ffdad8ab1ba RSI: 0000000000080001 RDI: 00000000004a23c2 RBP: 00007ffdad8ab1b0 R08: 0000000000000000 R09: 0000000000000004 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004021c0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 9527: 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_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 9258: 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_check_open_permission+0x19e/0x3e0 security/tomoyo/file.c:786 tomoyo_file_open security/tomoyo/tomoyo.c:319 [inline] tomoyo_file_open+0xa9/0xd0 security/tomoyo/tomoyo.c:314 security_file_open+0x71/0x300 security/security.c:1530 do_dentry_open+0x365/0x1350 fs/open.c:784 vfs_open+0xa0/0xd0 fs/open.c:914 do_last fs/namei.c:3487 [inline] path_openat+0x12fd/0x34d0 fs/namei.c:3604 do_filp_open+0x192/0x260 fs/namei.c:3634 do_sys_openat2+0x633/0x840 fs/open.c:1151 do_sys_open+0xfc/0x190 fs/open.c:1167 ksys_open include/linux/syscalls.h:1387 [inline] __do_sys_open fs/open.c:1173 [inline] __se_sys_open fs/open.c:1171 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1171 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 ffff8880940b12c0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880940b12c0, ffff8880940b12e0) The buggy address belongs to the page: page:ffffea0002502c40 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880940b1fc1 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea00024fd048 ffffea00028c8388 ffff8880aa4001c0 raw: ffff8880940b1fc1 ffff8880940b1000 000000010000002e 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880940b1180: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880940b1200: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880940b1280: 00 07 fc fc fc fc fc fc 04 fc fc fc fc fc fc fc ^ ffff8880940b1300: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880940b1380: fb fb fb fb fc fc fc fc 00 01 fc fc fc fc fc fc ==================================================================