[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 93.377527][ T27] audit: type=1800 audit(1579420366.525:25): pid=9407 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 93.398650][ T27] audit: type=1800 audit(1579420366.525:26): pid=9407 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 93.456470][ T27] audit: type=1800 audit(1579420366.525:27): pid=9407 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 '10.128.0.154' (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 syzkaller login: [ 104.868651][ C0] ================================================================== [ 104.876907][ C0] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc+0x112/0x4f0 [ 104.884542][ C0] Read of size 8 at addr ffff88809f96b780 by task syz-executor422/9916 [ 104.892880][ C0] [ 104.895224][ C0] CPU: 0 PID: 9916 Comm: syz-executor422 Not tainted 5.5.0-rc5-syzkaller #0 [ 104.903894][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 104.913966][ C0] Call Trace: [ 104.917253][ C0] [ 104.920115][ C0] dump_stack+0x197/0x210 [ 104.924488][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 104.929353][ C0] print_address_description.constprop.0.cold+0xd4/0x30b [ 104.936388][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 104.941246][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 104.946107][ C0] __kasan_report.cold+0x1b/0x41 [ 104.951152][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 104.956021][ C0] kasan_report+0x12/0x20 [ 104.960359][ C0] check_memory_region+0x134/0x1a0 [ 104.965491][ C0] __kasan_check_read+0x11/0x20 [ 104.970353][ C0] bitmap_port_gc+0x112/0x4f0 [ 104.975104][ C0] call_timer_fn+0x1ac/0x780 [ 104.979709][ C0] ? bitmap_port_test+0x170/0x170 [ 104.984748][ C0] ? msleep_interruptible+0x150/0x150 [ 104.990131][ C0] ? run_timer_softirq+0x6b1/0x1790 [ 104.995538][ C0] ? trace_hardirqs_on+0x67/0x240 [ 105.000591][ C0] ? bitmap_port_test+0x170/0x170 [ 105.005632][ C0] ? bitmap_port_test+0x170/0x170 [ 105.010677][ C0] run_timer_softirq+0x6c3/0x1790 [ 105.015723][ C0] ? add_timer+0x930/0x930 [ 105.020150][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 105.026412][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 105.031993][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 105.037983][ C0] ? trace_hardirqs_on+0x67/0x240 [ 105.043022][ C0] __do_softirq+0x262/0x98c [ 105.047536][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 105.052411][ C0] irq_exit+0x19b/0x1e0 [ 105.056583][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 105.062266][ C0] apic_timer_interrupt+0xf/0x20 [ 105.067206][ C0] [ 105.070154][ C0] RIP: 0010:_raw_write_unlock_irq+0x4f/0x80 [ 105.076139][ C0] Code: c0 e8 34 93 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d e2 e2 be 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 77 38 7c f9 65 8b 05 68 cc 2d 78 85 c0 74 06 41 [ 105.095906][ C0] RSP: 0018:ffffc90003807d78 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 105.104770][ C0] RAX: 1ffffffff132669d RBX: ffff888094f1d340 RCX: 0000000000000000 [ 105.112751][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a9242bd4 [ 105.120737][ C0] RBP: ffffc90003807d80 R08: ffff8880a9242340 R09: 0000000000000000 [ 105.128719][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff898090c0 [ 105.136699][ C0] R13: 0000000000000011 R14: ffff8880a9242340 R15: 00000000000002ab [ 105.144706][ C0] ? _raw_write_unlock_irq+0x23/0x80 [ 105.150009][ C0] do_exit+0x1616/0x2f50 [ 105.154278][ C0] ? mm_update_next_owner+0x7c0/0x7c0 [ 105.159666][ C0] ? down_read_non_owner+0x490/0x490 [ 105.165190][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 105.171484][ C0] ? handle_mm_fault+0x4ab/0xa50 [ 105.176454][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 105.181947][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 105.187424][ C0] do_group_exit+0x135/0x360 [ 105.192032][ C0] __x64_sys_exit_group+0x44/0x50 [ 105.197070][ C0] do_syscall_64+0xfa/0x790 [ 105.201610][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.207613][ C0] RIP: 0033:0x440008 [ 105.211516][ C0] Code: Bad RIP value. [ 105.215585][ C0] RSP: 002b:00007ffee9794728 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 105.224013][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440008 [ 105.231991][ C0] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 105.239973][ C0] RBP: 00000000004bf890 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 105.247956][ C0] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000001 [ 105.256336][ C0] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 105.264326][ C0] [ 105.266667][ C0] Allocated by task 9559: [ 105.271007][ C0] save_stack+0x23/0x90 [ 105.275174][ C0] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 105.280815][ C0] kasan_kmalloc+0x9/0x10 [ 105.285158][ C0] __kmalloc+0x163/0x770 [ 105.289396][ C0] ip_set_alloc+0x38/0x5e [ 105.293717][ C0] bitmap_port_create+0x3dc/0x7c0 [ 105.298746][ C0] ip_set_create+0x6f1/0x1500 [ 105.303428][ C0] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 105.308387][ C0] netlink_rcv_skb+0x177/0x450 [ 105.313251][ C0] nfnetlink_rcv+0x1ba/0x460 [ 105.317837][ C0] netlink_unicast+0x58c/0x7d0 [ 105.322606][ C0] netlink_sendmsg+0x91c/0xea0 [ 105.327374][ C0] sock_sendmsg+0xd7/0x130 [ 105.331902][ C0] ____sys_sendmsg+0x753/0x880 [ 105.336667][ C0] ___sys_sendmsg+0x100/0x170 [ 105.341336][ C0] __sys_sendmsg+0x105/0x1d0 [ 105.346102][ C0] __x64_sys_sendmsg+0x78/0xb0 [ 105.350875][ C0] do_syscall_64+0xfa/0x790 [ 105.355385][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.361269][ C0] [ 105.363600][ C0] Freed by task 9291: [ 105.367594][ C0] save_stack+0x23/0x90 [ 105.371744][ C0] __kasan_slab_free+0x102/0x150 [ 105.376673][ C0] kasan_slab_free+0xe/0x10 [ 105.381183][ C0] kfree+0x10a/0x2c0 [ 105.385088][ C0] single_release+0x95/0xc0 [ 105.389597][ C0] __fput+0x2ff/0x890 [ 105.393584][ C0] ____fput+0x16/0x20 [ 105.397570][ C0] task_work_run+0x145/0x1c0 [ 105.402169][ C0] exit_to_usermode_loop+0x316/0x380 [ 105.407469][ C0] do_syscall_64+0x676/0x790 [ 105.412082][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.418055][ C0] [ 105.420392][ C0] The buggy address belongs to the object at ffff88809f96b780 [ 105.420392][ C0] which belongs to the cache kmalloc-32 of size 32 [ 105.434276][ C0] The buggy address is located 0 bytes inside of [ 105.434276][ C0] 32-byte region [ffff88809f96b780, ffff88809f96b7a0) [ 105.447417][ C0] The buggy address belongs to the page: [ 105.453058][ C0] page:ffffea00027e5ac0 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809f96bfc1 [ 105.463492][ C0] raw: 00fffe0000000200 ffffea0002a44d48 ffffea000279a708 ffff8880aa4001c0 [ 105.472085][ C0] raw: ffff88809f96bfc1 ffff88809f96b000 000000010000003f 0000000000000000 [ 105.480766][ C0] page dumped because: kasan: bad access detected [ 105.487181][ C0] [ 105.489509][ C0] Memory state around the buggy address: [ 105.495143][ C0] ffff88809f96b680: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 105.503316][ C0] ffff88809f96b700: 00 fc fc fc fc fc fc fc 00 01 fc fc fc fc fc fc [ 105.511384][ C0] >ffff88809f96b780: 04 fc fc fc 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 105.519447][ C0] ^ [ 105.523629][ C0] ffff88809f96b800: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 105.531699][ C0] ffff88809f96b880: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 105.539758][ C0] ================================================================== [ 105.548017][ C0] Disabling lock debugging due to kernel taint [ 105.554674][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 105.561294][ C0] CPU: 0 PID: 9916 Comm: syz-executor422 Tainted: G B 5.5.0-rc5-syzkaller #0 [ 105.571465][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.581619][ C0] Call Trace: [ 105.584901][ C0] [ 105.587761][ C0] dump_stack+0x197/0x210 [ 105.592104][ C0] panic+0x2e3/0x75c [ 105.596003][ C0] ? add_taint.cold+0x16/0x16 [ 105.600793][ C0] ? retint_kernel+0x2b/0x2b [ 105.605500][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 105.610532][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 105.615386][ C0] end_report+0x47/0x4f [ 105.619542][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 105.624401][ C0] __kasan_report.cold+0xe/0x41 [ 105.629256][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 105.634110][ C0] kasan_report+0x12/0x20 [ 105.638443][ C0] check_memory_region+0x134/0x1a0 [ 105.643904][ C0] __kasan_check_read+0x11/0x20 [ 105.648760][ C0] bitmap_port_gc+0x112/0x4f0 [ 105.653455][ C0] call_timer_fn+0x1ac/0x780 [ 105.658050][ C0] ? bitmap_port_test+0x170/0x170 [ 105.663078][ C0] ? msleep_interruptible+0x150/0x150 [ 105.668566][ C0] ? run_timer_softirq+0x6b1/0x1790 [ 105.676198][ C0] ? trace_hardirqs_on+0x67/0x240 [ 105.681228][ C0] ? bitmap_port_test+0x170/0x170 [ 105.686255][ C0] ? bitmap_port_test+0x170/0x170 [ 105.691320][ C0] run_timer_softirq+0x6c3/0x1790 [ 105.696354][ C0] ? add_timer+0x930/0x930 [ 105.700779][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 105.706943][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 105.712498][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 105.718486][ C0] ? trace_hardirqs_on+0x67/0x240 [ 105.723525][ C0] __do_softirq+0x262/0x98c [ 105.728033][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 105.732895][ C0] irq_exit+0x19b/0x1e0 [ 105.737059][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 105.742624][ C0] apic_timer_interrupt+0xf/0x20 [ 105.747563][ C0] [ 105.750507][ C0] RIP: 0010:_raw_write_unlock_irq+0x4f/0x80 [ 105.756398][ C0] Code: c0 e8 34 93 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d e2 e2 be 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 77 38 7c f9 65 8b 05 68 cc 2d 78 85 c0 74 06 41 [ 105.776117][ C0] RSP: 0018:ffffc90003807d78 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 105.784578][ C0] RAX: 1ffffffff132669d RBX: ffff888094f1d340 RCX: 0000000000000000 [ 105.792542][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a9242bd4 [ 105.800519][ C0] RBP: ffffc90003807d80 R08: ffff8880a9242340 R09: 0000000000000000 [ 105.808600][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff898090c0 [ 105.816718][ C0] R13: 0000000000000011 R14: ffff8880a9242340 R15: 00000000000002ab [ 105.824882][ C0] ? _raw_write_unlock_irq+0x23/0x80 [ 105.830192][ C0] do_exit+0x1616/0x2f50 [ 105.834546][ C0] ? mm_update_next_owner+0x7c0/0x7c0 [ 105.839912][ C0] ? down_read_non_owner+0x490/0x490 [ 105.845184][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 105.851413][ C0] ? handle_mm_fault+0x4ab/0xa50 [ 105.856486][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 105.861948][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 105.867414][ C0] do_group_exit+0x135/0x360 [ 105.872006][ C0] __x64_sys_exit_group+0x44/0x50 [ 105.877073][ C0] do_syscall_64+0xfa/0x790 [ 105.881569][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.887453][ C0] RIP: 0033:0x440008 [ 105.891347][ C0] Code: Bad RIP value. [ 105.895408][ C0] RSP: 002b:00007ffee9794728 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 105.903842][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440008 [ 105.911819][ C0] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 105.919800][ C0] RBP: 00000000004bf890 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 105.927772][ C0] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000001 [ 105.935738][ C0] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 105.945223][ C0] Kernel Offset: disabled [ 105.949545][ C0] Rebooting in 86400 seconds..