[ 91.536338][ T27] audit: type=1800 audit(1579427376.486:26): pid=9668 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. [ 92.386111][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 92.386123][ T27] audit: type=1800 audit(1579427377.356:29): pid=9668 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 [ 92.412741][ T27] audit: type=1800 audit(1579427377.356:30): pid=9668 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 '10.128.0.237' (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 syzkaller login: [ 104.893827][ C1] ================================================================== [ 104.902197][ C1] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc+0x112/0x4f0 [ 104.909732][ C1] Read of size 8 at addr ffff88809e4c5740 by task swapper/1/0 [ 104.917168][ C1] [ 104.919484][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc6-syzkaller #0 [ 104.927471][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 104.937572][ C1] Call Trace: [ 104.941123][ C1] [ 104.944062][ C1] dump_stack+0x197/0x210 [ 104.948397][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 104.953288][ C1] print_address_description.constprop.0.cold+0xd4/0x30b [ 104.960457][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 104.965300][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 104.970178][ C1] __kasan_report.cold+0x1b/0x41 [ 104.975102][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 104.979948][ C1] kasan_report+0x12/0x20 [ 104.984263][ C1] check_memory_region+0x134/0x1a0 [ 104.989365][ C1] __kasan_check_read+0x11/0x20 [ 104.994237][ C1] bitmap_port_gc+0x112/0x4f0 [ 104.998900][ C1] call_timer_fn+0x1ac/0x780 [ 105.003681][ C1] ? bitmap_port_test+0x170/0x170 [ 105.008711][ C1] ? msleep_interruptible+0x150/0x150 [ 105.014069][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 105.019262][ C1] ? trace_hardirqs_on+0x67/0x240 [ 105.024279][ C1] ? bitmap_port_test+0x170/0x170 [ 105.029309][ C1] ? bitmap_port_test+0x170/0x170 [ 105.034328][ C1] run_timer_softirq+0x6c3/0x1790 [ 105.039346][ C1] ? add_timer+0x930/0x930 [ 105.043750][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 105.049899][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 105.055479][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 105.061453][ C1] ? trace_hardirqs_on+0x67/0x240 [ 105.066603][ C1] __do_softirq+0x262/0x98c [ 105.071397][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 105.076326][ C1] irq_exit+0x19b/0x1e0 [ 105.080483][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 105.086028][ C1] apic_timer_interrupt+0xf/0x20 [ 105.090950][ C1] [ 105.093877][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 105.099234][ C1] Code: 48 92 de f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 54 54 54 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 44 54 54 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 4e 60 8e f9 e8 b9 [ 105.118987][ C1] RSP: 0018:ffffc90000d3fd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 105.127445][ C1] RAX: 1ffffffff1326676 RBX: ffff8880a99fc340 RCX: 0000000000000000 [ 105.135406][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a99fcbd4 [ 105.143367][ C1] RBP: ffffc90000d3fd98 R08: ffff8880a99fc340 R09: 0000000000000000 [ 105.151331][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 105.159302][ C1] R13: ffffffff8a7b4cc0 R14: 0000000000000000 R15: 0000000000000001 [ 105.167288][ C1] ? default_idle+0x4e/0x360 [ 105.171878][ C1] arch_cpu_idle+0xa/0x10 [ 105.176204][ C1] default_idle_call+0x84/0xb0 [ 105.180992][ C1] do_idle+0x3c8/0x6e0 [ 105.185065][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 105.190223][ C1] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 105.196024][ C1] ? complete+0x61/0x80 [ 105.200169][ C1] cpu_startup_entry+0x1b/0x20 [ 105.205034][ C1] start_secondary+0x2f4/0x410 [ 105.209938][ C1] ? set_cpu_sibling_map+0x2140/0x2140 [ 105.215447][ C1] secondary_startup_64+0xa4/0xb0 [ 105.220516][ C1] [ 105.222858][ C1] Allocated by task 9823: [ 105.227176][ C1] save_stack+0x23/0x90 [ 105.231327][ C1] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 105.237034][ C1] kasan_kmalloc+0x9/0x10 [ 105.241362][ C1] __kmalloc+0x163/0x770 [ 105.245831][ C1] ip_set_alloc+0x38/0x5e [ 105.250145][ C1] bitmap_port_create+0x3dc/0x7c0 [ 105.255161][ C1] ip_set_create+0x6f1/0x1500 [ 105.259963][ C1] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 105.264889][ C1] netlink_rcv_skb+0x177/0x450 [ 105.269689][ C1] nfnetlink_rcv+0x1ba/0x460 [ 105.274307][ C1] netlink_unicast+0x58c/0x7d0 [ 105.279060][ C1] netlink_sendmsg+0x91c/0xea0 [ 105.283810][ C1] sock_sendmsg+0xd7/0x130 [ 105.288216][ C1] ____sys_sendmsg+0x753/0x880 [ 105.292969][ C1] ___sys_sendmsg+0x100/0x170 [ 105.297633][ C1] __sys_sendmsg+0x105/0x1d0 [ 105.302209][ C1] __x64_sys_sendmsg+0x78/0xb0 [ 105.306973][ C1] do_syscall_64+0xfa/0x790 [ 105.311464][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.317538][ C1] [ 105.319866][ C1] Freed by task 9549: [ 105.323859][ C1] save_stack+0x23/0x90 [ 105.328557][ C1] __kasan_slab_free+0x102/0x150 [ 105.333849][ C1] kasan_slab_free+0xe/0x10 [ 105.338489][ C1] kfree+0x10a/0x2c0 [ 105.342523][ C1] single_release+0x95/0xc0 [ 105.347090][ C1] __fput+0x2ff/0x890 [ 105.351062][ C1] ____fput+0x16/0x20 [ 105.355027][ C1] task_work_run+0x145/0x1c0 [ 105.359698][ C1] exit_to_usermode_loop+0x316/0x380 [ 105.364968][ C1] do_syscall_64+0x676/0x790 [ 105.369538][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.375407][ C1] [ 105.377852][ C1] The buggy address belongs to the object at ffff88809e4c5740 [ 105.377852][ C1] which belongs to the cache kmalloc-32 of size 32 [ 105.391857][ C1] The buggy address is located 0 bytes inside of [ 105.391857][ C1] 32-byte region [ffff88809e4c5740, ffff88809e4c5760) [ 105.404856][ C1] The buggy address belongs to the page: [ 105.410478][ C1] page:ffffea0002793140 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809e4c5fc1 [ 105.420879][ C1] raw: 00fffe0000000200 ffffea0002761088 ffffea00028cf108 ffff8880aa4001c0 [ 105.429503][ C1] raw: ffff88809e4c5fc1 ffff88809e4c5000 0000000100000039 0000000000000000 [ 105.438070][ C1] page dumped because: kasan: bad access detected [ 105.444637][ C1] [ 105.446946][ C1] Memory state around the buggy address: [ 105.452564][ C1] ffff88809e4c5600: fb fb fb fb fc fc fc fc 05 fc fc fc fc fc fc fc [ 105.460722][ C1] ffff88809e4c5680: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 105.468778][ C1] >ffff88809e4c5700: 00 fc fc fc fc fc fc fc 04 fc fc fc fc fc fc fc [ 105.477621][ C1] ^ [ 105.485691][ C1] ffff88809e4c5780: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 105.493855][ C1] ffff88809e4c5800: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 105.501901][ C1] ================================================================== [ 105.510077][ C1] Disabling lock debugging due to kernel taint [ 105.516276][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 105.522864][ C1] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B 5.5.0-rc6-syzkaller #0 [ 105.532133][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.542273][ C1] Call Trace: [ 105.545542][ C1] [ 105.548383][ C1] dump_stack+0x197/0x210 [ 105.552715][ C1] panic+0x2e3/0x75c [ 105.556624][ C1] ? add_taint.cold+0x16/0x16 [ 105.561301][ C1] ? retint_kernel+0x2b/0x2b [ 105.565900][ C1] ? trace_hardirqs_on+0x5e/0x240 [ 105.570937][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 105.575913][ C1] end_report+0x47/0x4f [ 105.580081][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 105.584931][ C1] __kasan_report.cold+0xe/0x41 [ 105.589798][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 105.594636][ C1] kasan_report+0x12/0x20 [ 105.599071][ C1] check_memory_region+0x134/0x1a0 [ 105.604183][ C1] __kasan_check_read+0x11/0x20 [ 105.609162][ C1] bitmap_port_gc+0x112/0x4f0 [ 105.613858][ C1] call_timer_fn+0x1ac/0x780 [ 105.618458][ C1] ? bitmap_port_test+0x170/0x170 [ 105.623513][ C1] ? msleep_interruptible+0x150/0x150 [ 105.629060][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 105.634270][ C1] ? trace_hardirqs_on+0x67/0x240 [ 105.639289][ C1] ? bitmap_port_test+0x170/0x170 [ 105.644315][ C1] ? bitmap_port_test+0x170/0x170 [ 105.649368][ C1] run_timer_softirq+0x6c3/0x1790 [ 105.654395][ C1] ? add_timer+0x930/0x930 [ 105.658926][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 105.665102][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 105.670687][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 105.676666][ C1] ? trace_hardirqs_on+0x67/0x240 [ 105.681690][ C1] __do_softirq+0x262/0x98c [ 105.686189][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 105.691061][ C1] irq_exit+0x19b/0x1e0 [ 105.695229][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 105.700823][ C1] apic_timer_interrupt+0xf/0x20 [ 105.705747][ C1] [ 105.708683][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 105.714048][ C1] Code: 48 92 de f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 54 54 54 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 44 54 54 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 4e 60 8e f9 e8 b9 [ 105.733896][ C1] RSP: 0018:ffffc90000d3fd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 105.742451][ C1] RAX: 1ffffffff1326676 RBX: ffff8880a99fc340 RCX: 0000000000000000 [ 105.750530][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a99fcbd4 [ 105.758520][ C1] RBP: ffffc90000d3fd98 R08: ffff8880a99fc340 R09: 0000000000000000 [ 105.766488][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 105.774455][ C1] R13: ffffffff8a7b4cc0 R14: 0000000000000000 R15: 0000000000000001 [ 105.782550][ C1] ? default_idle+0x4e/0x360 [ 105.787147][ C1] arch_cpu_idle+0xa/0x10 [ 105.791592][ C1] default_idle_call+0x84/0xb0 [ 105.796359][ C1] do_idle+0x3c8/0x6e0 [ 105.800434][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 105.805454][ C1] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 105.811258][ C1] ? complete+0x61/0x80 [ 105.815433][ C1] cpu_startup_entry+0x1b/0x20 [ 105.820344][ C1] start_secondary+0x2f4/0x410 [ 105.825218][ C1] ? set_cpu_sibling_map+0x2140/0x2140 [ 105.830934][ C1] secondary_startup_64+0xa4/0xb0 [ 105.837511][ C1] Kernel Offset: disabled [ 105.841934][ C1] Rebooting in 86400 seconds..