[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 79.254259][ T27] audit: type=1800 audit(1580385825.803:25): pid=9368 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 79.275334][ T27] audit: type=1800 audit(1580385825.803:26): pid=9368 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 79.330628][ T27] audit: type=1800 audit(1580385825.803:27): pid=9368 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.100' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 102.103581][ C1] ================================================================== [ 102.112152][ C1] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc+0x112/0x4f0 [ 102.120582][ C1] Read of size 8 at addr ffff88809d99c640 by task syz-executor136/9980 [ 102.128947][ C1] [ 102.131440][ C1] CPU: 1 PID: 9980 Comm: syz-executor136 Not tainted 5.5.0-rc6-next-20200116-syzkaller #0 [ 102.141333][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.151730][ C1] Call Trace: [ 102.155057][ C1] [ 102.157929][ C1] dump_stack+0x197/0x210 [ 102.162415][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 102.167513][ C1] print_address_description.constprop.0.cold+0xd4/0x30b [ 102.174784][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 102.179650][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 102.184654][ C1] __kasan_report.cold+0x1b/0x32 [ 102.189612][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 102.194625][ C1] kasan_report+0x12/0x20 [ 102.198972][ C1] check_memory_region+0x134/0x1a0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.204100][ C1] __kasan_check_read+0x11/0x20 [ 102.209107][ C1] bitmap_port_gc+0x112/0x4f0 [ 102.213959][ C1] call_timer_fn+0x1ac/0x780 [ 102.218563][ C1] ? bitmap_port_test+0x170/0x170 [ 102.223751][ C1] ? msleep_interruptible+0x150/0x150 [ 102.229132][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 102.234486][ C1] ? trace_hardirqs_on+0x67/0x240 [ 102.239547][ C1] ? bitmap_port_test+0x170/0x170 [ 102.244828][ C1] ? bitmap_port_test+0x170/0x170 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.249876][ C1] run_timer_softirq+0x6c3/0x1790 [ 102.255091][ C1] ? add_timer+0x930/0x930 [ 102.259525][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 102.265830][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 102.271613][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 102.277877][ C1] ? trace_hardirqs_on+0x67/0x240 [ 102.283243][ C1] __do_softirq+0x262/0x98c [ 102.287938][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 102.292959][ C1] irq_exit+0x19b/0x1e0 [ 102.297128][ C1] smp_apic_timer_interrupt+0x1a3/0x610 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.302886][ C1] apic_timer_interrupt+0xf/0x20 [ 102.307937][ C1] [ 102.310892][ C1] RIP: 0010:clear_page_erms+0x7/0x10 [ 102.316319][ C1] Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 cc cc cc cc cc cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 [ 102.336653][ C1] RSP: 0018:ffffc900022a7ba0 EFLAGS: 00010246 ORIG_RAX: ffffffffffffff13 [ 102.345213][ C1] RAX: 0000000000000000 RBX: ffff888000000000 RCX: 0000000000000140 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.353210][ C1] RDX: 1ffff110150506a6 RSI: ffffffff81a320c6 RDI: ffff8880898a3ec0 [ 102.361328][ C1] RBP: ffffc900022a7bb8 R08: ffff8880a8282140 R09: ffffed1015d27074 [ 102.369315][ C1] R10: ffffed1015d27073 R11: ffff8880ae93839b R12: ffff8880a8282140 [ 102.377303][ C1] R13: 00000000000000a3 R14: 0000000000000000 R15: 0000000000000000 [ 102.385309][ C1] ? clear_subpage+0x16/0x110 [ 102.390017][ C1] ? clear_subpage+0x85/0x110 [ 102.394712][ C1] clear_huge_page+0xb5/0x3e0 [ 102.399419][ C1] do_huge_pmd_anonymous_page+0x6a6/0x1a50 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.405245][ C1] ? prep_transhuge_page+0xa0/0xa0 [ 102.410385][ C1] __handle_mm_fault+0x3421/0x3c20 [ 102.415654][ C1] ? apply_to_existing_page_range+0x50/0x50 [ 102.421563][ C1] ? handle_mm_fault+0x292/0xa50 [ 102.426524][ C1] ? handle_mm_fault+0x7a0/0xa50 [ 102.431479][ C1] ? __kasan_check_read+0x11/0x20 [ 102.436530][ C1] handle_mm_fault+0x3b2/0xa50 [ 102.441316][ C1] do_page_fault+0x545/0x12e1 [ 102.446024][ C1] page_fault+0x39/0x40 [ 102.450188][ C1] RIP: 0033:0x400761 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.454098][ C1] Code: 03 00 00 00 be 10 00 00 00 bf 29 00 00 00 e8 36 0d 04 00 48 83 f8 ff 74 07 48 89 05 39 a9 2c 00 48 b8 62 69 74 6d 61 70 3a 70 <48> c7 04 25 40 01 00 20 00 00 00 00 c7 04 25 48 01 00 20 00 00 00 [ 102.473718][ C1] RSP: 002b:00007fff74967650 EFLAGS: 00010213 [ 102.479969][ C1] RAX: 703a70616d746962 RBX: 0000000000000000 RCX: 0000000000441499 [ 102.488090][ C1] RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010 [ 102.496073][ C1] RBP: 0000000000018eac R08: 0000000000000004 R09: 00000000004002c8 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.504059][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402210 [ 102.512164][ C1] R13: 00000000004022a0 R14: 0000000000000000 R15: 0000000000000000 [ 102.520160][ C1] [ 102.522502][ C1] Allocated by task 9529: [ 102.526845][ C1] save_stack+0x23/0x90 [ 102.531016][ C1] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 102.536661][ C1] kasan_kmalloc+0x9/0x10 [ 102.540998][ C1] __kmalloc+0x163/0x770 [ 102.545252][ C1] ip_set_alloc+0x38/0x5e [ 102.549608][ C1] bitmap_port_create+0x3dc/0x7c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.554642][ C1] ip_set_create+0x6f1/0x1500 [ 102.559332][ C1] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 102.564280][ C1] netlink_rcv_skb+0x177/0x450 [ 102.569057][ C1] nfnetlink_rcv+0x1ba/0x460 [ 102.573657][ C1] netlink_unicast+0x59e/0x7e0 [ 102.578434][ C1] netlink_sendmsg+0x91c/0xea0 [ 102.583542][ C1] sock_sendmsg+0xd7/0x130 [ 102.587971][ C1] ____sys_sendmsg+0x753/0x880 [ 102.593056][ C1] ___sys_sendmsg+0x100/0x170 [ 102.597744][ C1] __sys_sendmsg+0x105/0x1d0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.602603][ C1] __x64_sys_sendmsg+0x78/0xb0 [ 102.607381][ C1] do_syscall_64+0xfa/0x790 [ 102.612158][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 102.618051][ C1] [ 102.620393][ C1] Freed by task 9252: [ 102.624477][ C1] save_stack+0x23/0x90 [ 102.628646][ C1] __kasan_slab_free+0x102/0x150 [ 102.633601][ C1] kasan_slab_free+0xe/0x10 [ 102.638123][ C1] kfree+0x10a/0x2c0 [ 102.642035][ C1] single_release+0x95/0xc0 [ 102.646546][ C1] __fput+0x2ff/0x890 [ 102.650541][ C1] ____fput+0x16/0x20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.654535][ C1] task_work_run+0x145/0x1c0 [ 102.659139][ C1] exit_to_usermode_loop+0x316/0x380 [ 102.664626][ C1] do_syscall_64+0x676/0x790 [ 102.669231][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 102.675126][ C1] [ 102.677471][ C1] The buggy address belongs to the object at ffff88809d99c640 [ 102.677471][ C1] which belongs to the cache kmalloc-32 of size 32 [ 102.691359][ C1] The buggy address is located 0 bytes inside of [ 102.691359][ C1] 32-byte region [ffff88809d99c640, ffff88809d99c660) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.704393][ C1] The buggy address belongs to the page: [ 102.710054][ C1] page:ffffea0002766700 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809d99cfc1 [ 102.720637][ C1] flags: 0xfffe0000000200(slab) [ 102.725532][ C1] raw: 00fffe0000000200 ffffea00025dc0c8 ffffea00029d1e88 ffff8880aa4001c0 [ 102.734133][ C1] raw: ffff88809d99cfc1 ffff88809d99c000 0000000100000039 0000000000000000 [ 102.744457][ C1] page dumped because: kasan: bad access detected [ 102.750870][ C1] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.753206][ C1] Memory state around the buggy address: [ 102.758858][ C1] ffff88809d99c500: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 102.766930][ C1] ffff88809d99c580: 00 00 fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 102.775002][ C1] >ffff88809d99c600: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc [ 102.783177][ C1] ^ [ 102.789342][ C1] ffff88809d99c680: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 102.797416][ C1] ffff88809d99c700: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.805484][ C1] ================================================================== [ 102.813550][ C1] Disabling lock debugging due to kernel taint [ 102.819770][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 102.826370][ C1] CPU: 1 PID: 9980 Comm: syz-executor136 Tainted: G B 5.5.0-rc6-next-20200116-syzkaller #0 [ 102.837965][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.848159][ C1] Call Trace: [ 102.851452][ C1] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.854328][ C1] dump_stack+0x197/0x210 [ 102.858671][ C1] panic+0x2e3/0x75c [ 102.862746][ C1] ? add_taint.cold+0x16/0x16 [ 102.867435][ C1] ? retint_kernel+0x2b/0x2b [ 102.872243][ C1] ? trace_hardirqs_on+0x5e/0x240 [ 102.877416][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 102.882554][ C1] end_report+0x47/0x4f [ 102.886729][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 102.891798][ C1] __kasan_report.cold+0xe/0x32 [ 102.896752][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 102.901741][ C1] kasan_report+0x12/0x20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.906084][ C1] check_memory_region+0x134/0x1a0 [ 102.911434][ C1] __kasan_check_read+0x11/0x20 [ 102.916590][ C1] bitmap_port_gc+0x112/0x4f0 [ 102.921287][ C1] call_timer_fn+0x1ac/0x780 [ 102.925887][ C1] ? bitmap_port_test+0x170/0x170 [ 102.931096][ C1] ? msleep_interruptible+0x150/0x150 [ 102.936637][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 102.942128][ C1] ? trace_hardirqs_on+0x67/0x240 [ 102.947423][ C1] ? bitmap_port_test+0x170/0x170 [ 102.952670][ C1] ? bitmap_port_test+0x170/0x170 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 102.957731][ C1] run_timer_softirq+0x6c3/0x1790 [ 102.962781][ C1] ? add_timer+0x930/0x930 [ 102.967221][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 102.973576][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 102.979264][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 102.985461][ C1] ? trace_hardirqs_on+0x67/0x240 [ 102.990501][ C1] __do_softirq+0x262/0x98c [ 102.995236][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 103.000109][ C1] irq_exit+0x19b/0x1e0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 103.004414][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 103.010179][ C1] apic_timer_interrupt+0xf/0x20 [ 103.015478][ C1] [ 103.018590][ C1] RIP: 0010:clear_page_erms+0x7/0x10 [ 103.023884][ C1] Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 cc cc cc cc cc cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 [ 103.045035][ C1] RSP: 0018:ffffc900022a7ba0 EFLAGS: 00010246 ORIG_RAX: ffffffffffffff13 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 103.053587][ C1] RAX: 0000000000000000 RBX: ffff888000000000 RCX: 0000000000000140 [ 103.061722][ C1] RDX: 1ffff110150506a6 RSI: ffffffff81a320c6 RDI: ffff8880898a3ec0 [ 103.069872][ C1] RBP: ffffc900022a7bb8 R08: ffff8880a8282140 R09: ffffed1015d27074 [ 103.078062][ C1] R10: ffffed1015d27073 R11: ffff8880ae93839b R12: ffff8880a8282140 [ 103.086247][ C1] R13: 00000000000000a3 R14: 0000000000000000 R15: 0000000000000000 [ 103.094246][ C1] ? clear_subpage+0x16/0x110 [ 103.099185][ C1] ? clear_subpage+0x85/0x110 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 103.103887][ C1] clear_huge_page+0xb5/0x3e0 [ 103.108765][ C1] do_huge_pmd_anonymous_page+0x6a6/0x1a50 [ 103.114588][ C1] ? prep_transhuge_page+0xa0/0xa0 [ 103.119930][ C1] __handle_mm_fault+0x3421/0x3c20 [ 103.125273][ C1] ? apply_to_existing_page_range+0x50/0x50 [ 103.131451][ C1] ? handle_mm_fault+0x292/0xa50 [ 103.136409][ C1] ? handle_mm_fault+0x7a0/0xa50 [ 103.141362][ C1] ? __kasan_check_read+0x11/0x20 [ 103.146654][ C1] handle_mm_fault+0x3b2/0xa50 [ 103.151438][ C1] do_page_fault+0x545/0x12e1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 103.156386][ C1] page_fault+0x39/0x40 [ 103.160546][ C1] RIP: 0033:0x400761 [ 103.164588][ C1] Code: 03 00 00 00 be 10 00 00 00 bf 29 00 00 00 e8 36 0d 04 00 48 83 f8 ff 74 07 48 89 05 39 a9 2c 00 48 b8 62 69 74 6d 61 70 3a 70 <48> c7 04 25 40 01 00 20 00 00 00 00 c7 04 25 48 01 00 20 00 00 00 [ 103.184817][ C1] RSP: 002b:00007fff74967650 EFLAGS: 00010213 [ 103.191056][ C1] RAX: 703a70616d746962 RBX: 0000000000000000 RCX: 0000000000441499 [ 103.199245][ C1] RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010 executing program executing program executing program executing program executing program executing program executing program [ 103.207332][ C1] RBP: 0000000000018eac R08: 0000000000000004 R09: 00000000004002c8 [ 103.215611][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402210 [ 103.223853][ C1] R13: 00000000004022a0 R14: 0000000000000000 R15: 0000000000000000 [ 103.233732][ C1] Kernel Offset: disabled [ 103.238104][ C1] Rebooting in 86400 seconds..