================================================================== 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+0x173/0x5d0 net/netfilter/ipset/ip_set_bitmap_gen.h:277 Read of size 8 at addr ffff8880a6e540c0 by task udevd/8711 CPU: 1 PID: 8711 Comm: udevd 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+0x1fb/0x318 lib/dump_stack.c:118 print_address_description+0x74/0x5c0 mm/kasan/report.c:374 __kasan_report+0x149/0x1c0 mm/kasan/report.c:506 kasan_report+0x26/0x50 mm/kasan/common.c:639 check_memory_region_inline mm/kasan/generic.c:182 [inline] check_memory_region+0x2b6/0x2f0 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+0x173/0x5d0 net/netfilter/ipset/ip_set_bitmap_gen.h:277 call_timer_fn+0x95/0x170 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0x776/0x970 kernel/time/timer.c:1773 run_timer_softirq+0x4a/0x90 kernel/time/timer.c:1786 __do_softirq+0x283/0x7bd arch/x86/include/asm/paravirt.h:762 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x227/0x230 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:182 [inline] RIP: 0010:check_memory_region+0x59/0x2f0 mm/kasan/generic.c:192 Code: c1 ec 03 49 b8 00 00 00 00 00 fc ff df 4f 8d 0c 04 4c 8d 54 37 ff 49 c1 ea 03 49 bd 01 00 00 00 00 fc ff df 4d 01 ea 4d 89 d6 <4d> 29 ce 49 83 fe 10 7f 38 4d 85 f6 0f 84 b6 01 00 00 4c 89 cb 4c RSP: 0018:ffffc90001c67c78 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: ffff88808b650301 RBX: 000000000001ffff RCX: ffffffff815aba56 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880a7f2a5b0 RBP: ffffc90001c67ca0 R08: dffffc0000000000 R09: ffffed1014fe54b6 R10: ffffed1014fe54b7 R11: 0000000000000000 R12: 1ffff11014fe54b6 R13: dffffc0000000001 R14: ffffed1014fe54b7 R15: 1ffff11014fe54b5 __kasan_check_read+0x11/0x20 mm/kasan/common.c:95 atomic64_read include/asm-generic/atomic-instrumented.h:836 [inline] atomic_long_read include/asm-generic/atomic-long.h:28 [inline] rwsem_clear_reader_owned kernel/locking/rwsem.c:243 [inline] __up_read+0x146/0x740 kernel/locking/rwsem.c:1436 up_read+0x1d/0x20 kernel/locking/rwsem.c:1577 anon_vma_unlock_read include/linux/rmap.h:135 [inline] validate_mm+0x16f/0x9d0 mm/mmap.c:404 remove_vma_list mm/mmap.c:2579 [inline] __do_munmap+0x1138/0x14d0 mm/mmap.c:2820 __vm_munmap mm/mmap.c:2840 [inline] __do_sys_munmap mm/mmap.c:2866 [inline] __se_sys_munmap+0xe1/0x150 mm/mmap.c:2862 __x64_sys_munmap+0x5b/0x70 mm/mmap.c:2862 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f93f3ddad37 Code: f0 ff ff 73 01 c3 48 8b 0d fe c0 2a 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d d1 c0 2a 00 31 d2 48 29 c2 64 RSP: 002b:00007ffc1540cea8 EFLAGS: 00000206 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 0000000001712100 RCX: 00007f93f3ddad37 RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00007f93f46d1000 RBP: 0000000000000000 R08: 00007f93f46ca7a0 R09: 0000000000000000 R10: 1999999999999999 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000001712100 R14: 0000000000000006 R15: 0000000000000ae8 Allocated by task 17945: save_stack mm/kasan/common.c:72 [inline] set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc+0x118/0x1c0 mm/kasan/common.c:513 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x254/0x340 mm/slab.c:3665 kmalloc include/linux/slab.h:561 [inline] kzalloc+0x21/0x40 include/linux/slab.h:670 ip_set_alloc+0x32/0x60 net/netfilter/ipset/ip_set_core.c:255 init_map_ipmac net/netfilter/ipset/ip_set_bitmap_ipmac.c:302 [inline] bitmap_ipmac_create+0x3d9/0x840 net/netfilter/ipset/ip_set_bitmap_ipmac.c:365 ip_set_create+0x421/0xfd0 net/netfilter/ipset/ip_set_core.c:1111 nfnetlink_rcv_msg+0x9ae/0xcd0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x19e/0x3e0 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x1e0/0x1e50 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x767/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa2c/0xd50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg net/socket.c:659 [inline] ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2330 ___sys_sendmsg net/socket.c:2384 [inline] __sys_sendmsg+0x1ed/0x290 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2424 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 16544: save_stack mm/kasan/common.c:72 [inline] set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:335 [inline] __kasan_slab_free+0x12e/0x1e0 mm/kasan/common.c:474 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483 __cache_free mm/slab.c:3426 [inline] kfree+0x10d/0x220 mm/slab.c:3757 kobject_uevent_env+0x362/0x1160 lib/kobject_uevent.c:624 kvm_uevent_notify_change+0x359/0x3e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4253 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3549 [inline] kvm_dev_ioctl+0x1e30/0x1fc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3571 do_vfs_ioctl+0x6e2/0x19b0 fs/ioctl.c:47 ksys_ioctl fs/ioctl.c:749 [inline] __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0xe3/0x120 fs/ioctl.c:754 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a6e540c0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880a6e540c0, ffff8880a6e540e0) The buggy address belongs to the page: page:ffffea00029b9500 refcount:1 mapcount:0 mapping:ffff8880aa8001c0 index:0xffff8880a6e54fc1 raw: 00fffe0000000200 ffffea00026949c8 ffffea0002537688 ffff8880aa8001c0 raw: ffff8880a6e54fc1 ffff8880a6e54000 000000010000003e 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a6e53f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880a6e54000: 00 02 fc fc fc fc fc fc 00 02 fc fc fc fc fc fc >ffff8880a6e54080: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc ^ ffff8880a6e54100: fb fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc ffff8880a6e54180: 00 00 01 fc fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================