[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.527778][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 85.527790][ T27] audit: type=1800 audit(1579605904.001:29): pid=9720 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 85.554549][ T27] audit: type=1800 audit(1579605904.001:30): pid=9720 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.178' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 96.601453][ C0] ================================================================== [ 96.610155][ C0] BUG: KASAN: slab-out-of-bounds in bitmap_ipmac_gc+0x119/0x590 [ 96.617952][ C0] Read of size 8 at addr ffff888098430500 by task syz-executor680/10235 [ 96.626477][ C0] [ 96.628802][ C0] CPU: 0 PID: 10235 Comm: syz-executor680 Not tainted 5.5.0-rc7-syzkaller #0 [ 96.637652][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.647822][ C0] Call Trace: [ 96.651112][ C0] [ 96.653966][ C0] dump_stack+0x197/0x210 [ 96.658354][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 96.663295][ C0] print_address_description.constprop.0.cold+0xd4/0x30b [ 96.670421][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 96.675348][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 96.680281][ C0] __kasan_report.cold+0x1b/0x41 [ 96.685323][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 96.690395][ C0] kasan_report+0x12/0x20 [ 96.694805][ C0] check_memory_region+0x134/0x1a0 [ 96.699948][ C0] __kasan_check_read+0x11/0x20 [ 96.705849][ C0] bitmap_ipmac_gc+0x119/0x590 [ 96.710696][ C0] call_timer_fn+0x1ac/0x780 [ 96.715330][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 96.720615][ C0] ? msleep_interruptible+0x150/0x150 [ 96.726056][ C0] ? run_timer_softirq+0x6b1/0x1790 [ 96.731273][ C0] ? trace_hardirqs_on+0x67/0x240 [ 96.736595][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 96.742111][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 96.747391][ C0] run_timer_softirq+0x6c3/0x1790 [ 96.752414][ C0] ? add_timer+0x930/0x930 [ 96.756822][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 96.763787][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 96.769354][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 96.775430][ C0] ? trace_hardirqs_on+0x67/0x240 [ 96.780700][ C0] __do_softirq+0x262/0x98c [ 96.785212][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 96.790118][ C0] irq_exit+0x19b/0x1e0 [ 96.794369][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 96.800106][ C0] apic_timer_interrupt+0xf/0x20 [ 96.805154][ C0] [ 96.808087][ C0] RIP: 0010:get_page_from_freelist+0x3b83/0x42a0 [ 96.814417][ C0] 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 [ 96.834234][ C0] RSP: 0000:ffffc900036c78d8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 96.842905][ C0] RAX: fffffbfff1326673 RBX: dffffc0000000000 RCX: 0000000000000007 [ 96.851117][ C0] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000282 [ 96.859193][ C0] RBP: ffffc900036c7a80 R08: 1ffffffff165e7ad R09: fffffbfff165e7ae [ 96.867491][ C0] R10: fffffbfff165e7ad R11: ffffffff8b2f3d6f R12: 0000000000000004 [ 96.875580][ C0] R13: 0000000000000000 R14: ffffea00022affc0 R15: ffffea00022b0030 [ 96.883585][ C0] ? kasan_slab_alloc+0xf/0x20 [ 96.888489][ C0] ? kmem_cache_alloc+0x121/0x710 [ 96.893644][ C0] ? __khugepaged_enter+0x3b/0x3a0 [ 96.899014][ C0] ? wp_page_copy+0x9d1/0x1560 [ 96.903801][ C0] ? __isolate_free_page+0x4c0/0x4c0 [ 96.909089][ C0] ? __kasan_check_read+0x11/0x20 [ 96.914109][ C0] ? __khugepaged_enter+0x29a/0x3a0 [ 96.919299][ C0] __alloc_pages_nodemask+0x2d0/0x910 [ 96.924866][ C0] ? __alloc_pages_slowpath+0x2900/0x2900 [ 96.930601][ C0] ? lock_downgrade+0x920/0x920 [ 96.935455][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 96.941717][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 96.947974][ C0] alloc_pages_vma+0x3ce/0x620 [ 96.952732][ C0] do_huge_pmd_anonymous_page+0x48a/0x1a50 [ 96.958784][ C0] ? mark_lock+0xc2/0x1220 [ 96.963248][ C0] ? do_wp_page+0x54b/0x1540 [ 96.967836][ C0] ? prep_transhuge_page+0xa0/0xa0 [ 96.973145][ C0] ? pmd_val+0x100/0x100 [ 96.977383][ C0] __handle_mm_fault+0x3145/0x3cc0 [ 96.982509][ C0] ? apply_to_existing_page_range+0x50/0x50 [ 96.989699][ C0] ? handle_mm_fault+0x292/0xa50 [ 96.994682][ C0] ? handle_mm_fault+0x7a0/0xa50 [ 96.999616][ C0] ? __kasan_check_read+0x11/0x20 [ 97.004633][ C0] handle_mm_fault+0x3b2/0xa50 [ 97.009409][ C0] __do_page_fault+0x536/0xd80 [ 97.014182][ C0] do_page_fault+0x38/0x590 [ 97.018678][ C0] page_fault+0x39/0x40 [ 97.022832][ C0] RIP: 0033:0x40070e [ 97.026819][ C0] 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 [ 97.046420][ C0] RSP: 002b:00007ffdcbb62630 EFLAGS: 00010213 [ 97.052563][ C0] RAX: 0000000020000398 RBX: 0000000000000000 RCX: 00000000004413f9 [ 97.060745][ C0] RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010 [ 97.068707][ C0] RBP: 0000000000017938 R08: 0000000000000004 R09: 00000000004002c8 [ 97.076674][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402220 [ 97.084847][ C0] R13: 00000000004022b0 R14: 0000000000000000 R15: 0000000000000000 [ 97.092903][ C0] [ 97.095318][ C0] Allocated by task 9873: [ 97.099735][ C0] save_stack+0x23/0x90 [ 97.104013][ C0] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 97.109645][ C0] kasan_kmalloc+0x9/0x10 [ 97.114083][ C0] __kmalloc+0x163/0x770 [ 97.118318][ C0] ip_set_alloc+0x38/0x5e [ 97.122722][ C0] bitmap_ipmac_create+0x4e8/0xa00 [ 97.127873][ C0] ip_set_create+0x6f1/0x1500 [ 97.132538][ C0] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 97.137466][ C0] netlink_rcv_skb+0x177/0x450 [ 97.142231][ C0] nfnetlink_rcv+0x1ba/0x460 [ 97.146821][ C0] netlink_unicast+0x58c/0x7d0 [ 97.151575][ C0] netlink_sendmsg+0x91c/0xea0 [ 97.156339][ C0] sock_sendmsg+0xd7/0x130 [ 97.160743][ C0] ____sys_sendmsg+0x753/0x880 [ 97.165500][ C0] ___sys_sendmsg+0x100/0x170 [ 97.170288][ C0] __sys_sendmsg+0x105/0x1d0 [ 97.174875][ C0] __x64_sys_sendmsg+0x78/0xb0 [ 97.183201][ C0] do_syscall_64+0xfa/0x790 [ 97.187828][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.193815][ C0] [ 97.196521][ C0] Freed by task 9583: [ 97.200496][ C0] save_stack+0x23/0x90 [ 97.204660][ C0] __kasan_slab_free+0x102/0x150 [ 97.209669][ C0] kasan_slab_free+0xe/0x10 [ 97.214158][ C0] kfree+0x10a/0x2c0 [ 97.218043][ C0] single_release+0x95/0xc0 [ 97.222622][ C0] __fput+0x2ff/0x890 [ 97.226587][ C0] ____fput+0x16/0x20 [ 97.230974][ C0] task_work_run+0x145/0x1c0 [ 97.235557][ C0] exit_to_usermode_loop+0x316/0x380 [ 97.241001][ C0] do_syscall_64+0x676/0x790 [ 97.245642][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.251569][ C0] [ 97.254232][ C0] The buggy address belongs to the object at ffff888098430500 [ 97.254232][ C0] which belongs to the cache kmalloc-32 of size 32 [ 97.268258][ C0] The buggy address is located 0 bytes inside of [ 97.268258][ C0] 32-byte region [ffff888098430500, ffff888098430520) [ 97.281494][ C0] The buggy address belongs to the page: [ 97.287126][ C0] page:ffffea0002610c00 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff888098430fc1 [ 97.297528][ C0] raw: 00fffe0000000200 ffffea000280a748 ffffea00029a0bc8 ffff8880aa4001c0 [ 97.306233][ C0] raw: ffff888098430fc1 ffff888098430000 000000010000002a 0000000000000000 [ 97.314805][ C0] page dumped because: kasan: bad access detected [ 97.321637][ C0] [ 97.324061][ C0] Memory state around the buggy address: [ 97.329694][ C0] ffff888098430400: 00 00 fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 97.337766][ C0] ffff888098430480: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 97.346909][ C0] >ffff888098430500: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 97.355757][ C0] ^ [ 97.359817][ C0] ffff888098430580: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 97.368564][ C0] ffff888098430600: fb fb fb fb fc fc fc fc 00 05 fc fc fc fc fc fc [ 97.377156][ C0] ================================================================== [ 97.385313][ C0] Disabling lock debugging due to kernel taint [ 97.391502][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 97.398180][ C0] CPU: 0 PID: 10235 Comm: syz-executor680 Tainted: G B 5.5.0-rc7-syzkaller #0 [ 97.408907][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.419032][ C0] Call Trace: [ 97.422324][ C0] [ 97.425171][ C0] dump_stack+0x197/0x210 [ 97.429597][ C0] panic+0x2e3/0x75c [ 97.433477][ C0] ? add_taint.cold+0x16/0x16 [ 97.438162][ C0] ? retint_kernel+0x2b/0x2b [ 97.442796][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 97.447818][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 97.452864][ C0] end_report+0x47/0x4f [ 97.457005][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 97.461947][ C0] __kasan_report.cold+0xe/0x41 [ 97.467975][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 97.472942][ C0] kasan_report+0x12/0x20 [ 97.477258][ C0] check_memory_region+0x134/0x1a0 [ 97.482361][ C0] __kasan_check_read+0x11/0x20 [ 97.487455][ C0] bitmap_ipmac_gc+0x119/0x590 [ 97.492368][ C0] call_timer_fn+0x1ac/0x780 [ 97.496996][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 97.502381][ C0] ? msleep_interruptible+0x150/0x150 [ 97.507865][ C0] ? run_timer_softirq+0x6b1/0x1790 [ 97.513067][ C0] ? trace_hardirqs_on+0x67/0x240 [ 97.518105][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 97.523617][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 97.529005][ C0] run_timer_softirq+0x6c3/0x1790 [ 97.534172][ C0] ? add_timer+0x930/0x930 [ 97.538694][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 97.544927][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 97.550497][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 97.556463][ C0] ? trace_hardirqs_on+0x67/0x240 [ 97.561529][ C0] __do_softirq+0x262/0x98c [ 97.566021][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 97.570976][ C0] irq_exit+0x19b/0x1e0 [ 97.575254][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 97.581003][ C0] apic_timer_interrupt+0xf/0x20 [ 97.585918][ C0] [ 97.588848][ C0] RIP: 0010:get_page_from_freelist+0x3b83/0x42a0 [ 97.595155][ C0] 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 [ 97.614827][ C0] RSP: 0000:ffffc900036c78d8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 97.623362][ C0] RAX: fffffbfff1326673 RBX: dffffc0000000000 RCX: 0000000000000007 [ 97.631329][ C0] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000282 [ 97.640665][ C0] RBP: ffffc900036c7a80 R08: 1ffffffff165e7ad R09: fffffbfff165e7ae [ 97.648623][ C0] R10: fffffbfff165e7ad R11: ffffffff8b2f3d6f R12: 0000000000000004 [ 97.656582][ C0] R13: 0000000000000000 R14: ffffea00022affc0 R15: ffffea00022b0030 [ 97.664563][ C0] ? kasan_slab_alloc+0xf/0x20 [ 97.669313][ C0] ? kmem_cache_alloc+0x121/0x710 [ 97.674323][ C0] ? __khugepaged_enter+0x3b/0x3a0 [ 97.679540][ C0] ? wp_page_copy+0x9d1/0x1560 [ 97.684467][ C0] ? __isolate_free_page+0x4c0/0x4c0 [ 97.689765][ C0] ? __kasan_check_read+0x11/0x20 [ 97.694779][ C0] ? __khugepaged_enter+0x29a/0x3a0 [ 97.700063][ C0] __alloc_pages_nodemask+0x2d0/0x910 [ 97.705462][ C0] ? __alloc_pages_slowpath+0x2900/0x2900 [ 97.711217][ C0] ? lock_downgrade+0x920/0x920 [ 97.717226][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 97.723520][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 97.729748][ C0] alloc_pages_vma+0x3ce/0x620 [ 97.734520][ C0] do_huge_pmd_anonymous_page+0x48a/0x1a50 [ 97.740303][ C0] ? mark_lock+0xc2/0x1220 [ 97.744812][ C0] ? do_wp_page+0x54b/0x1540 [ 97.749391][ C0] ? prep_transhuge_page+0xa0/0xa0 [ 97.754496][ C0] ? pmd_val+0x100/0x100 [ 97.758725][ C0] __handle_mm_fault+0x3145/0x3cc0 [ 97.763889][ C0] ? apply_to_existing_page_range+0x50/0x50 [ 97.769763][ C0] ? handle_mm_fault+0x292/0xa50 [ 97.774691][ C0] ? handle_mm_fault+0x7a0/0xa50 [ 97.779617][ C0] ? __kasan_check_read+0x11/0x20 [ 97.784629][ C0] handle_mm_fault+0x3b2/0xa50 [ 97.789382][ C0] __do_page_fault+0x536/0xd80 [ 97.794140][ C0] do_page_fault+0x38/0x590 [ 97.798689][ C0] page_fault+0x39/0x40 [ 97.803347][ C0] RIP: 0033:0x40070e [ 97.807318][ C0] 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 [ 97.827036][ C0] RSP: 002b:00007ffdcbb62630 EFLAGS: 00010213 [ 97.833101][ C0] RAX: 0000000020000398 RBX: 0000000000000000 RCX: 00000000004413f9 [ 97.841194][ C0] RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010 [ 97.849164][ C0] RBP: 0000000000017938 R08: 0000000000000004 R09: 00000000004002c8 [ 97.857128][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402220 [ 97.865092][ C0] R13: 00000000004022b0 R14: 0000000000000000 R15: 0000000000000000 [ 97.874712][ C0] Kernel Offset: disabled [ 97.879043][ C0] Rebooting in 86400 seconds..