================================================================== 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_ip_gc_test net/netfilter/ipset/ip_set_bitmap_ip.c:76 [inline] BUG: KASAN: slab-out-of-bounds in bitmap_ip_gc+0x100/0x4f0 net/netfilter/ipset/ip_set_bitmap_gen.h:277 Read of size 8 at addr ffff8880987e3280 by task syz-executor158/9973 CPU: 1 PID: 9973 Comm: syz-executor158 Not tainted 5.5.0-rc5-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/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_ip_gc_test net/netfilter/ipset/ip_set_bitmap_ip.c:76 [inline] bitmap_ip_gc+0x100/0x4f0 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:get_lock_parent_ip include/linux/ftrace.h:796 [inline] RIP: 0010:preempt_latency_start kernel/sched/core.c:3765 [inline] RIP: 0010:preempt_latency_start kernel/sched/core.c:3762 [inline] RIP: 0010:preempt_count_add+0x7a/0x160 kernel/sched/core.c:3790 Code: b6 c0 3d f4 00 00 00 7f 7f 65 8b 05 a8 73 b1 7e 25 ff ff ff 7f 39 c3 74 05 5b 41 5c 5d c3 48 8b 5d 08 48 89 df e8 36 ba 0a 00 <85> c0 75 39 65 4c 8b 24 25 c0 1e 02 00 49 8d bc 24 58 12 00 00 48 RSP: 0000:ffffc900036b7b50 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffffffff81a1bea3 RCX: 1ffffffff16cec9c RDX: 0000000000000000 RSI: ffffffff81a1be96 RDI: ffffffff81a1bea3 RBP: ffffc900036b7b60 R08: ffff888093e3c440 R09: ffffed1015d2703d R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 0000000000004d00 R13: 0000000000000134 R14: 0000000000000000 R15: 0000000000000000 kmap_atomic include/linux/highmem.h:93 [inline] clear_user_highpage include/linux/highmem.h:160 [inline] clear_subpage+0x23/0x110 mm/memory.c:4673 process_huge_page mm/memory.c:4627 [inline] clear_huge_page+0xb5/0x3e0 mm/memory.c:4687 __do_huge_pmd_anonymous_page mm/huge_memory.c:596 [inline] do_huge_pmd_anonymous_page+0x6a6/0x1a50 mm/huge_memory.c:764 create_huge_pmd mm/memory.c:3888 [inline] __handle_mm_fault+0x3145/0x3cc0 mm/memory.c:4098 handle_mm_fault+0x3b2/0xa50 mm/memory.c:4164 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline] __do_page_fault+0x536/0xd80 arch/x86/mm/fault.c:1506 do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1530 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1203 RIP: 0033:0x400713 Code: 03 00 00 00 be 10 00 00 00 bf 29 00 00 00 e8 24 0d 04 00 48 83 f8 ff 74 07 48 89 05 87 a9 2c 00 48 b8 62 69 74 6d 61 70 3a 69 <48> c7 04 25 00 03 00 20 00 00 00 00 c7 04 25 08 03 00 20 00 00 00 RSP: 002b:00007ffee78cceb0 EFLAGS: 00010213 RAX: 693a70616d746962 RBX: 0000000000000000 RCX: 0000000000441439 RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010 RBP: 000000000001ba88 R08: 0000000000000004 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402260 R13: 00000000004022f0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 9616: 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_ip net/netfilter/ipset/ip_set_bitmap_ip.c:223 [inline] bitmap_ip_create+0x6ec/0xc20 net/netfilter/ipset/ip_set_bitmap_ip.c:327 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 9337: 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_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:1497 do_dentry_open+0x37a/0x1380 fs/open.c:784 vfs_open+0xa0/0xd0 fs/open.c:914 do_last fs/namei.c:3420 [inline] path_openat+0x10df/0x4500 fs/namei.c:3537 do_filp_open+0x1a1/0x280 fs/namei.c:3567 do_sys_open+0x3fe/0x5d0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1110 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 ffff8880987e3280 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880987e3280, ffff8880987e32a0) The buggy address belongs to the page: page:ffffea000261f8c0 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880987e3fc1 raw: 00fffe0000000200 ffffea000287c788 ffffea00029a0648 ffff8880aa4001c0 raw: ffff8880987e3fc1 ffff8880987e3000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880987e3180: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ffff8880987e3200: 00 03 fc fc fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880987e3280: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff8880987e3300: 00 03 fc fc fc fc fc fc fb fb fb fb fc fc fc fc ffff8880987e3380: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================