================================================================== 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 ffff88809d55bd00 by task udevd/10623 CPU: 1 PID: 10623 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_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:__sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:180 Code: cc cc cc cc cc cc cc cc cc 65 48 8b 04 25 c0 1e 02 00 48 8b 80 98 13 00 00 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 55 <48> 89 e5 65 48 8b 04 25 c0 1e 02 00 65 8b 15 54 29 8d 7e 81 e2 00 RSP: 0018:ffffc900026b7710 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffffc900026b7798 RCX: ffffffff81c40242 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffff89970640 RBP: ffffc900026b77c0 R08: 1ffff11011c2a05e R09: ffffed1011c2a05f R10: ffffed1011c2a05e R11: ffff88808e1502f3 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff89970640 map_id_down kernel/user_namespace.c:312 [inline] make_kuid+0x23/0x30 kernel/user_namespace.c:389 i_uid_write include/linux/fs.h:1570 [inline] inode_init_always+0x29b/0xba0 fs/inode.c:147 alloc_inode+0x89/0x1e0 fs/inode.c:237 new_inode_pseudo+0x19/0xf0 fs/inode.c:926 new_inode+0x1f/0x40 fs/inode.c:955 shmem_get_inode+0x84/0x7e0 mm/shmem.c:2249 shmem_mknod+0x5a/0x1f0 mm/shmem.c:2885 shmem_create+0x2b/0x40 mm/shmem.c:2945 lookup_open+0x12d5/0x1a90 fs/namei.c:3177 do_last fs/namei.c:3267 [inline] path_openat+0xdaa/0x3180 fs/namei.c:3473 do_filp_open+0x1a1/0x280 fs/namei.c:3503 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 RIP: 0033:0x7f76414be120 Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24 RSP: 002b:00007ffe48a592c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000001f1d170 RCX: 00007f76414be120 RDX: 00000000000001b6 RSI: 0000000000080241 RDI: 00007ffe48a597b0 RBP: 00007ffe48a59340 R08: 0000000000000004 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000420721 R14: 00007ffe48a593b0 R15: 0000000000000001 Allocated by task 13418: 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+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 12937: 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 security_cred_free+0xa9/0x110 security/security.c:1548 put_cred_rcu+0x129/0x4b0 kernel/cred.c:114 __put_cred+0x1ef/0x270 kernel/cred.c:148 put_cred include/linux/cred.h:287 [inline] do_faccessat+0x693/0x7f0 fs/open.c:439 __do_sys_access fs/open.c:450 [inline] __se_sys_access fs/open.c:448 [inline] __x64_sys_access+0x59/0x80 fs/open.c:448 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 ffff88809d55bd00 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff88809d55bd00, ffff88809d55bd20) The buggy address belongs to the page: page:ffffea00027556c0 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809d55bfc1 raw: 00fffe0000000200 ffffea00028cd348 ffffea00028d7048 ffff8880aa4001c0 raw: ffff88809d55bfc1 ffff88809d55b000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809d55bc00: 05 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc ffff88809d55bc80: fb fb fb fb fc fc fc fc 00 04 fc fc fc fc fc fc >ffff88809d55bd00: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff88809d55bd80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff88809d55be00: 00 06 fc fc fc fc fc fc 00 00 00 03 fc fc fc fc ==================================================================