================================================================== 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 ffff888098430500 by task syz-executor680/10235 CPU: 0 PID: 10235 Comm: syz-executor680 Not tainted 5.5.0-rc7-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_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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:rmqueue mm/page_alloc.c:3293 [inline] RIP: 0010:get_page_from_freelist+0x3b83/0x42a0 mm/page_alloc.c:3681 Code: 00 e9 2e e8 ff ff e8 0c aa d0 ff 48 8b 85 a0 fe ff ff 80 38 00 75 3c 48 83 3d e0 52 e9 07 00 74 30 48 8b bd 28 ff ff ff 57 9d <0f> 1f 44 00 00 e9 d4 e7 ff ff e8 6e d4 08 00 e9 6b e7 ff ff 48 8b RSP: 0000:ffffc900036c78d8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: fffffbfff1326673 RBX: dffffc0000000000 RCX: 0000000000000007 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000282 RBP: ffffc900036c7a80 R08: 1ffffffff165e7ad R09: fffffbfff165e7ae R10: fffffbfff165e7ad R11: ffffffff8b2f3d6f R12: 0000000000000004 R13: 0000000000000000 R14: ffffea00022affc0 R15: ffffea00022b0030 __alloc_pages_nodemask+0x2d0/0x910 mm/page_alloc.c:4731 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] alloc_pages_vma+0x3ce/0x620 mm/mempolicy.c:2155 do_huge_pmd_anonymous_page+0x48a/0x1a50 mm/huge_memory.c:768 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: 0033:0x40070e Code: 0c 00 00 00 ba 03 00 00 00 be 10 00 00 00 bf 29 00 00 00 e8 e4 0c 04 00 48 83 f8 ff 74 07 48 89 05 87 a9 2c 00 b8 98 03 00 20 <48> c7 04 25 00 03 00 20 00 00 00 00 c7 04 25 08 03 00 20 00 00 00 RSP: 002b:00007ffdcbb62630 EFLAGS: 00010213 RAX: 0000000020000398 RBX: 0000000000000000 RCX: 00000000004413f9 RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010 RBP: 0000000000017938 R08: 0000000000000004 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402220 R13: 00000000004022b0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 9873: 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 9583: 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 single_release+0x95/0xc0 fs/seq_file.c:609 __fput+0x2ff/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x145/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x316/0x380 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath arch/x86/entry/common.c:278 [inline] do_syscall_64+0x676/0x790 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff888098430500 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff888098430500, ffff888098430520) The buggy address belongs to the page: page:ffffea0002610c00 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff888098430fc1 raw: 00fffe0000000200 ffffea000280a748 ffffea00029a0bc8 ffff8880aa4001c0 raw: ffff888098430fc1 ffff888098430000 000000010000002a 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888098430400: 00 00 fc fc fc fc fc fc fb fb fb fb fc fc fc fc ffff888098430480: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff888098430500: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff888098430580: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff888098430600: fb fb fb fb fc fc fc fc 00 05 fc fc fc fc fc fc ==================================================================