[ 72.213730][ T27] audit: type=1800 audit(1579364181.330:24): pid=9686 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.830315][ T27] audit: type=1800 audit(1579364182.060:25): pid=9686 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.861047][ T27] audit: type=1800 audit(1579364182.070:26): pid=9686 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.139' (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 syzkaller login: [ 92.551636][ C1] ================================================================== [ 92.560278][ C1] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc+0x112/0x4f0 [ 92.569246][ C1] Read of size 8 at addr ffff8880a0044e00 by task ksoftirqd/1/16 [ 92.576995][ C1] [ 92.579343][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.5.0-rc5-syzkaller #0 [ 92.587528][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.597717][ C1] Call Trace: [ 92.601021][ C1] dump_stack+0x197/0x210 [ 92.605374][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 92.610249][ C1] print_address_description.constprop.0.cold+0xd4/0x30b [ 92.617556][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 92.623188][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 92.628065][ C1] __kasan_report.cold+0x1b/0x41 [ 92.633034][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 92.637915][ C1] kasan_report+0x12/0x20 [ 92.642268][ C1] check_memory_region+0x134/0x1a0 [ 92.647405][ C1] __kasan_check_read+0x11/0x20 [ 92.652273][ C1] bitmap_port_gc+0x112/0x4f0 [ 92.656981][ C1] call_timer_fn+0x1ac/0x780 [ 92.661691][ C1] ? bitmap_port_test+0x170/0x170 [ 92.666735][ C1] ? msleep_interruptible+0x150/0x150 [ 92.672135][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 92.677477][ C1] ? trace_hardirqs_on+0x67/0x240 [ 92.682880][ C1] ? bitmap_port_test+0x170/0x170 [ 92.687932][ C1] ? bitmap_port_test+0x170/0x170 [ 92.692989][ C1] run_timer_softirq+0x6c3/0x1790 [ 92.698055][ C1] ? add_timer+0x930/0x930 [ 92.702489][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 92.708663][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 92.714375][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 92.720477][ C1] ? trace_hardirqs_on+0x67/0x240 [ 92.725503][ C1] __do_softirq+0x262/0x98c [ 92.730027][ C1] ? takeover_tasklets+0x820/0x820 [ 92.735370][ C1] run_ksoftirqd+0x8e/0x110 [ 92.739893][ C1] smpboot_thread_fn+0x6a3/0xa40 [ 92.744882][ C1] ? __smpboot_create_thread.part.0+0x340/0x340 [ 92.751141][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 92.757509][ C1] ? __kthread_parkme+0x108/0x1c0 [ 92.762554][ C1] ? __kasan_check_read+0x11/0x20 [ 92.767793][ C1] kthread+0x361/0x430 [ 92.771937][ C1] ? __smpboot_create_thread.part.0+0x340/0x340 [ 92.778201][ C1] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 92.783954][ C1] ret_from_fork+0x24/0x30 [ 92.788392][ C1] [ 92.790755][ C1] Allocated by task 9839: [ 92.795351][ C1] save_stack+0x23/0x90 [ 92.799539][ C1] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 92.805196][ C1] kasan_kmalloc+0x9/0x10 [ 92.809645][ C1] __kmalloc+0x163/0x770 [ 92.813907][ C1] ip_set_alloc+0x38/0x5e [ 92.818386][ C1] bitmap_port_create+0x3dc/0x7c0 [ 92.823606][ C1] ip_set_create+0x6f1/0x1500 [ 92.828526][ C1] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 92.833485][ C1] netlink_rcv_skb+0x177/0x450 [ 92.838264][ C1] nfnetlink_rcv+0x1ba/0x460 [ 92.843027][ C1] netlink_unicast+0x59e/0x7e0 [ 92.847801][ C1] netlink_sendmsg+0x91c/0xea0 [ 92.852710][ C1] sock_sendmsg+0xd7/0x130 [ 92.857665][ C1] ____sys_sendmsg+0x753/0x880 [ 92.862457][ C1] ___sys_sendmsg+0x100/0x170 [ 92.867152][ C1] __sys_sendmsg+0x105/0x1d0 [ 92.871765][ C1] __x64_sys_sendmsg+0x78/0xb0 [ 92.876555][ C1] do_syscall_64+0xfa/0x790 [ 92.881169][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.887216][ C1] [ 92.889555][ C1] Freed by task 9568: [ 92.893557][ C1] save_stack+0x23/0x90 [ 92.897742][ C1] __kasan_slab_free+0x102/0x150 [ 92.902720][ C1] kasan_slab_free+0xe/0x10 [ 92.907276][ C1] kfree+0x10a/0x2c0 [ 92.911192][ C1] tomoyo_check_open_permission+0x19e/0x3e0 [ 92.917236][ C1] tomoyo_file_open+0xa9/0xd0 [ 92.922263][ C1] security_file_open+0x71/0x300 [ 92.927220][ C1] do_dentry_open+0x37a/0x1380 [ 92.932145][ C1] vfs_open+0xa0/0xd0 [ 92.936746][ C1] path_openat+0x10df/0x4500 [ 92.941345][ C1] do_filp_open+0x1a1/0x280 [ 92.946017][ C1] do_sys_open+0x3fe/0x5d0 [ 92.950460][ C1] __x64_sys_open+0x7e/0xc0 [ 92.954984][ C1] do_syscall_64+0xfa/0x790 [ 92.959509][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.965713][ C1] [ 92.968166][ C1] The buggy address belongs to the object at ffff8880a0044e00 [ 92.968166][ C1] which belongs to the cache kmalloc-32 of size 32 [ 92.982351][ C1] The buggy address is located 0 bytes inside of [ 92.982351][ C1] 32-byte region [ffff8880a0044e00, ffff8880a0044e20) [ 92.995699][ C1] The buggy address belongs to the page: [ 93.002404][ C1] page:ffffea0002801100 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880a0044fc1 [ 93.013203][ C1] raw: 00fffe0000000200 ffffea0002a1fc08 ffffea0002803d08 ffff8880aa4001c0 [ 93.021817][ C1] raw: ffff8880a0044fc1 ffff8880a0044000 000000010000003b 0000000000000000 [ 93.030591][ C1] page dumped because: kasan: bad access detected [ 93.037212][ C1] [ 93.039550][ C1] Memory state around the buggy address: [ 93.045301][ C1] ffff8880a0044d00: fb fb fb fb fc fc fc fc 00 01 fc fc fc fc fc fc [ 93.053684][ C1] ffff8880a0044d80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 93.062045][ C1] >ffff8880a0044e00: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 93.070250][ C1] ^ [ 93.074356][ C1] ffff8880a0044e80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 93.082428][ C1] ffff8880a0044f00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 93.090648][ C1] ================================================================== [ 93.098711][ C1] Disabling lock debugging due to kernel taint executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 93.104919][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 93.111526][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Tainted: G B 5.5.0-rc5-syzkaller #0 [ 93.121511][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.133352][ C1] Call Trace: [ 93.136646][ C1] dump_stack+0x197/0x210 [ 93.140971][ C1] panic+0x2e3/0x75c [ 93.144949][ C1] ? add_taint.cold+0x16/0x16 [ 93.149740][ C1] ? retint_kernel+0x2b/0x2b [ 93.154350][ C1] ? trace_hardirqs_on+0x5e/0x240 [ 93.159394][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 93.164430][ C1] end_report+0x47/0x4f [ 93.168603][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 93.173555][ C1] __kasan_report.cold+0xe/0x41 [ 93.178413][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 93.183313][ C1] kasan_report+0x12/0x20 [ 93.187696][ C1] check_memory_region+0x134/0x1a0 [ 93.194041][ C1] __kasan_check_read+0x11/0x20 [ 93.199037][ C1] bitmap_port_gc+0x112/0x4f0 [ 93.203824][ C1] call_timer_fn+0x1ac/0x780 [ 93.209522][ C1] ? bitmap_port_test+0x170/0x170 [ 93.214565][ C1] ? msleep_interruptible+0x150/0x150 [ 93.220084][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 93.225301][ C1] ? trace_hardirqs_on+0x67/0x240 [ 93.230519][ C1] ? bitmap_port_test+0x170/0x170 [ 93.235555][ C1] ? bitmap_port_test+0x170/0x170 [ 93.240621][ C1] run_timer_softirq+0x6c3/0x1790 [ 93.245837][ C1] ? add_timer+0x930/0x930 [ 93.250352][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 93.256509][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 93.262055][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 93.268046][ C1] ? trace_hardirqs_on+0x67/0x240 [ 93.273091][ C1] __do_softirq+0x262/0x98c [ 93.277597][ C1] ? takeover_tasklets+0x820/0x820 [ 93.282716][ C1] run_ksoftirqd+0x8e/0x110 [ 93.287239][ C1] smpboot_thread_fn+0x6a3/0xa40 [ 93.294478][ C1] ? __smpboot_create_thread.part.0+0x340/0x340 [ 93.300743][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 93.307194][ C1] ? __kthread_parkme+0x108/0x1c0 [ 93.312215][ C1] ? __kasan_check_read+0x11/0x20 [ 93.317344][ C1] kthread+0x361/0x430 [ 93.321542][ C1] ? __smpboot_create_thread.part.0+0x340/0x340 [ 93.327879][ C1] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 93.333721][ C1] ret_from_fork+0x24/0x30 [ 93.339884][ C1] Kernel Offset: disabled [ 93.344232][ C1] Rebooting in 86400 seconds..