================================================================== 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 ffff8880a120a240 by task udevd/9908 CPU: 0 PID: 9908 Comm: udevd Not tainted 5.5.0-rc6-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:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:write_comp_data+0x0/0x70 kernel/kcov.c:207 Code: 83 fa 02 75 20 48 8b 88 88 13 00 00 8b 80 84 13 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 <65> 4c 8b 04 25 c0 1e 02 00 65 8b 05 08 29 8d 7e a9 00 01 1f 00 75 RSP: 0018:ffffc9000d45f760 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff11012032e50 RBX: 0000000000000000 RCX: ffffffff81a226c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007 RBP: ffffc9000d45f768 R08: ffff88809b07a280 R09: fffff52001a8bedd R10: fffff52001a8bedc R11: 0000000000000003 R12: 0000000000000000 R13: ffff888090197280 R14: dffffc0000000000 R15: 00007f15c52b4000 zap_pte_range mm/memory.c:1044 [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+0x8f7/0x28a0 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:3134 __mmput kernel/fork.c:1082 [inline] mmput+0x179/0x4d0 kernel/fork.c:1103 exec_mmap fs/exec.c:1047 [inline] flush_old_exec+0x8ef/0x1de0 fs/exec.c:1280 load_elf_binary+0x980/0x5310 fs/binfmt_elf.c:846 search_binary_handler fs/exec.c:1658 [inline] search_binary_handler+0x16d/0x570 fs/exec.c:1635 exec_binprm fs/exec.c:1701 [inline] __do_execve_file.isra.0+0x1329/0x22b0 fs/exec.c:1821 do_execveat_common fs/exec.c:1867 [inline] do_execve fs/exec.c:1884 [inline] __do_sys_execve fs/exec.c:1960 [inline] __se_sys_execve fs/exec.c:1955 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1955 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f15c4dcf207 Code: Bad RIP value. RSP: 002b:00007fff73bd4758 EFLAGS: 00000202 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f15c4dcf207 RDX: 0000000000e16730 RSI: 00007fff73bd4850 RDI: 00007fff73bd5860 RBP: 0000000000625500 R08: 00000000000024f4 R09: 00000000000024f4 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000e16730 R13: 0000000000000007 R14: 0000000000e15250 R15: 0000000000000005 Allocated by task 9841: 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 275: 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 kfree_const+0x59/0x70 mm/util.c:40 kernfs_put fs/kernfs/dir.c:528 [inline] kernfs_put+0x1a0/0x590 fs/kernfs/dir.c:506 sysfs_put include/linux/sysfs.h:564 [inline] kobject_del+0xb1/0x170 lib/kobject.c:624 kobject_cleanup lib/kobject.c:687 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x22c/0x2e0 lib/kobject.c:739 netdev_queue_update_kobjects+0x2b8/0x3d0 net/core/net-sysfs.c:1514 remove_queue_kobjects net/core/net-sysfs.c:1567 [inline] netdev_unregister_kobject+0x15e/0x1f0 net/core/net-sysfs.c:1717 rollback_registered_many+0xafe/0x10d0 net/core/dev.c:8782 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9908 unregister_netdevice_many net/core/dev.c:9907 [inline] default_device_exit_batch+0x360/0x420 net/core/dev.c:10381 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 The buggy address belongs to the object at ffff8880a120a240 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880a120a240, ffff8880a120a260) The buggy address belongs to the page: page:ffffea0002848280 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880a120afc1 raw: 00fffe0000000200 ffffea00028e01c8 ffffea000261cd88 ffff8880aa4001c0 raw: ffff8880a120afc1 ffff8880a120a000 0000000100000033 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a120a100: 07 fc fc fc fc fc fc fc 00 00 00 fc fc fc fc fc ffff8880a120a180: 05 fc fc fc fc fc fc fc 00 00 00 fc fc fc fc fc >ffff8880a120a200: 00 00 00 fc fc fc fc fc 04 fc fc fc fc fc fc fc ^ ffff8880a120a280: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a120a300: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc ==================================================================