================================================================== 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 ffff888099780a80 by task sshd/10501 CPU: 1 PID: 10501 Comm: sshd 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:pipe_read+0x0/0xe40 fs/pipe.c:285 Code: fe ff ff 48 89 55 c0 e8 1e 50 f3 ff 48 8b 55 c0 e9 68 ff ff ff e8 30 50 f3 ff e9 fd fd ff ff e8 26 50 f3 ff e9 08 ff ff ff 90 <55> 48 89 e5 41 57 49 89 f7 48 8d 85 38 ff ff ff 41 56 48 c1 e8 03 RSP: 0018:ffffc90001d5fc58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffffc90001d5fd80 RCX: ffffffff8399826b RDX: 1ffffffff106c84c RSI: ffffc90001d5fcc0 RDI: ffffc90001d5fd10 RBP: ffffc90001d5fda8 R08: ffff88809e76e040 R09: 0000000000000000 R10: fffffbfff14f69d0 R11: ffffffff8a7b4e87 R12: ffffffff88364240 R13: ffffc90001d5fcc0 R14: 0000000000000000 R15: 0000000000000000 __vfs_read+0xe1/0x110 fs/read_write.c:427 vfs_read+0x1f0/0x440 fs/read_write.c:461 ksys_read+0x220/0x290 fs/read_write.c:587 __do_sys_read fs/read_write.c:597 [inline] __se_sys_read fs/read_write.c:595 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:595 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fa29658c310 Code: 73 01 c3 48 8b 0d 28 4b 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d e5 a2 2b 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 6e 8a 01 00 48 89 04 24 RSP: 002b:00007ffe5fbbc298 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000558a84516fc0 RCX: 00007fa29658c310 RDX: 0000000000004000 RSI: 00007ffe5fbbc2a0 RDI: 0000000000000009 RBP: 00007fa2981f16a0 R08: 00007ffe5fbc0380 R09: 0101010101010101 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 0000558a84515b60 R14: 0000558a84515b40 R15: 0000000000000050 Allocated by task 10504: 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 10276: 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_scan_exec_realpath security/tomoyo/condition.c:248 [inline] tomoyo_condition+0xd96/0x2a90 security/tomoyo/condition.c:827 tomoyo_check_acl+0x1b7/0x3e0 security/tomoyo/domain.c:177 tomoyo_execute_permission+0x188/0x4a0 security/tomoyo/file.c:615 tomoyo_find_next_domain+0x348/0x1f6c security/tomoyo/domain.c:754 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:107 [inline] tomoyo_bprm_check_security+0x124/0x1a0 security/tomoyo/tomoyo.c:97 security_bprm_check+0x63/0xb0 security/security.c:784 search_binary_handler+0x71/0x570 fs/exec.c:1645 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 The buggy address belongs to the object at ffff888099780a80 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff888099780a80, ffff888099780aa0) The buggy address belongs to the page: page:ffffea000265e000 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff888099780fc1 raw: 00fffe0000000200 ffffea0002853c48 ffffea00029c3c88 ffff8880aa4001c0 raw: ffff888099780fc1 ffff888099780000 0000000100000032 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888099780980: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff888099780a00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff888099780a80: 04 fc fc fc fc fc fc fc 00 00 00 00 fc fc fc fc ^ ffff888099780b00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff888099780b80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================