[ 88.761738][ T27] audit: type=1800 audit(1580372135.928:26): pid=9597 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. [ 89.979903][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 89.979941][ T27] audit: type=1800 audit(1580372137.168:29): pid=9597 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 [ 90.006524][ T27] audit: type=1800 audit(1580372137.178:30): pid=9597 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 '10.128.0.161' (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 syzkaller login: [ 99.516564][ C1] ================================================================== [ 99.524973][ C1] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc+0x112/0x4f0 [ 99.532641][ C1] Read of size 8 at addr ffff8880a3b02c80 by task syz-executor203/10059 [ 99.541181][ C1] [ 99.543514][ C1] CPU: 1 PID: 10059 Comm: syz-executor203 Not tainted 5.5.0-rc6-next-20200116-syzkaller #0 [ 99.553474][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.563835][ C1] Call Trace: [ 99.567229][ C1] [ 99.570131][ C1] dump_stack+0x197/0x210 [ 99.574550][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 99.580399][ C1] print_address_description.constprop.0.cold+0xd4/0x30b [ 99.587569][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 99.592495][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 99.597458][ C1] __kasan_report.cold+0x1b/0x32 [ 99.602403][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 99.607264][ C1] kasan_report+0x12/0x20 [ 99.611608][ C1] check_memory_region+0x134/0x1a0 [ 99.616837][ C1] __kasan_check_read+0x11/0x20 [ 99.621696][ C1] bitmap_port_gc+0x112/0x4f0 [ 99.626523][ C1] call_timer_fn+0x1ac/0x780 [ 99.631115][ C1] ? bitmap_port_test+0x170/0x170 [ 99.636365][ C1] ? msleep_interruptible+0x150/0x150 [ 99.641757][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 99.647085][ C1] ? trace_hardirqs_on+0x67/0x240 [ 99.652122][ C1] ? bitmap_port_test+0x170/0x170 [ 99.657163][ C1] ? bitmap_port_test+0x170/0x170 [ 99.662199][ C1] run_timer_softirq+0x6c3/0x1790 [ 99.667243][ C1] ? add_timer+0x930/0x930 [ 99.671667][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 99.677986][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 99.683557][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 99.689664][ C1] ? trace_hardirqs_on+0x67/0x240 [ 99.694711][ C1] __do_softirq+0x262/0x98c [ 99.699272][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 99.704182][ C1] irq_exit+0x19b/0x1e0 [ 99.708356][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 99.713916][ C1] apic_timer_interrupt+0xf/0x20 [ 99.718947][ C1] [ 99.721884][ C1] RIP: 0010:write_comp_data+0x1e/0x70 [ 99.727252][ C1] Code: 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65 4c 8b 04 25 c0 1e 02 00 65 8b 05 58 86 8c 7e a9 00 01 1f 00 75 51 41 8b 80 88 13 00 00 <83> f8 03 75 45 49 8b 80 90 13 00 00 45 8b 80 8c 13 00 00 4c 8b 08 [ 99.747365][ C1] RSP: 0000:ffffc900033f7af8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 99.755808][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81a85d0d [ 99.763944][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ 99.771914][ C1] RBP: ffffc900033f7b00 R08: ffff88809ea46040 R09: fffff94000460e61 [ 99.779934][ C1] R10: fffff94000460e60 R11: ffffea0002307307 R12: ffffea0002307300 [ 99.788034][ C1] R13: ffff888090ea7148 R14: ffffea0002307300 R15: 0000000000000000 [ 99.796152][ C1] ? page_add_file_rmap+0x7d/0xd60 [ 99.801287][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 99.807524][ C1] page_add_file_rmap+0x7d/0xd60 [ 99.812576][ C1] alloc_set_pte+0x62b/0x17d0 [ 99.817260][ C1] ? rcu_read_lock_held_common+0x130/0x130 [ 99.823297][ C1] filemap_map_pages+0x1232/0x1510 [ 99.828578][ C1] ? filemap_page_mkwrite+0x310/0x310 [ 99.834027][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 99.840280][ C1] __handle_mm_fault+0x394a/0x3c20 [ 99.845400][ C1] ? apply_to_existing_page_range+0x50/0x50 [ 99.851292][ C1] ? handle_mm_fault+0x292/0xa50 [ 99.856357][ C1] ? handle_mm_fault+0x7a0/0xa50 [ 99.862262][ C1] ? __kasan_check_read+0x11/0x20 [ 99.867280][ C1] handle_mm_fault+0x3b2/0xa50 [ 99.872169][ C1] do_page_fault+0x545/0x12e1 [ 99.876861][ C1] page_fault+0x39/0x40 [ 99.881143][ C1] RIP: 0033:0x43fd5a [ 99.885159][ C1] Code: Bad RIP value. [ 99.889223][ C1] RSP: 002b:00007ffde30e2380 EFLAGS: 00010246 [ 99.895352][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000043fd5a [ 99.903322][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 99.911297][ C1] RBP: 00007ffde30e23a0 R08: 0000000000000000 R09: 0000000001756880 [ 99.919393][ C1] R10: 0000000001756b50 R11: 0000000000000246 R12: 0000000000000000 [ 99.927408][ C1] R13: 0000000000402250 R14: 0000000000000000 R15: 0000000000000000 [ 99.936747][ C1] [ 99.939085][ C1] Allocated by task 9751: [ 99.943415][ C1] save_stack+0x23/0x90 [ 99.947587][ C1] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 99.953225][ C1] kasan_kmalloc+0x9/0x10 [ 99.957563][ C1] __kmalloc+0x163/0x770 [ 99.961810][ C1] ip_set_alloc+0x38/0x5e [ 99.966191][ C1] bitmap_port_create+0x3dc/0x7c0 [ 99.971241][ C1] ip_set_create+0x6f1/0x1500 [ 99.975923][ C1] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 99.980861][ C1] netlink_rcv_skb+0x177/0x450 [ 99.985623][ C1] nfnetlink_rcv+0x1ba/0x460 [ 99.990222][ C1] netlink_unicast+0x59e/0x7e0 [ 99.994992][ C1] netlink_sendmsg+0x91c/0xea0 [ 99.999798][ C1] sock_sendmsg+0xd7/0x130 [ 100.004225][ C1] ____sys_sendmsg+0x753/0x880 [ 100.008982][ C1] ___sys_sendmsg+0x100/0x170 [ 100.013778][ C1] __sys_sendmsg+0x105/0x1d0 [ 100.018469][ C1] __x64_sys_sendmsg+0x78/0xb0 [ 100.023251][ C1] do_syscall_64+0xfa/0x790 [ 100.027761][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 100.033656][ C1] [ 100.036088][ C1] Freed by task 9479: [ 100.040076][ C1] save_stack+0x23/0x90 [ 100.044254][ C1] __kasan_slab_free+0x102/0x150 [ 100.049190][ C1] kasan_slab_free+0xe/0x10 [ 100.053690][ C1] kfree+0x10a/0x2c0 [ 100.057617][ C1] single_release+0x95/0xc0 [ 100.062115][ C1] __fput+0x2ff/0x890 [ 100.066091][ C1] ____fput+0x16/0x20 [ 100.070097][ C1] task_work_run+0x145/0x1c0 [ 100.074851][ C1] exit_to_usermode_loop+0x316/0x380 [ 100.080133][ C1] do_syscall_64+0x676/0x790 [ 100.084774][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 100.090665][ C1] [ 100.093002][ C1] The buggy address belongs to the object at ffff8880a3b02c80 [ 100.093002][ C1] which belongs to the cache kmalloc-32 of size 32 [ 100.106968][ C1] The buggy address is located 0 bytes inside of [ 100.106968][ C1] 32-byte region [ffff8880a3b02c80, ffff8880a3b02ca0) [ 100.120189][ C1] The buggy address belongs to the page: [ 100.125820][ C1] page:ffffea00028ec080 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880a3b02fc1 [ 100.136361][ C1] flags: 0xfffe0000000200(slab) [ 100.141230][ C1] raw: 00fffe0000000200 ffffea000285f488 ffffea000270a1c8 ffff8880aa4001c0 [ 100.149841][ C1] raw: ffff8880a3b02fc1 ffff8880a3b02000 0000000100000037 0000000000000000 [ 100.158521][ C1] page dumped because: kasan: bad access detected [ 100.164929][ C1] [ 100.167483][ C1] Memory state around the buggy address: [ 100.173112][ C1] ffff8880a3b02b80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 100.181170][ C1] ffff8880a3b02c00: fb fb fb fb fc fc fc fc 00 01 fc fc fc fc fc fc [ 100.190391][ C1] >ffff8880a3b02c80: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 100.198786][ C1] ^ [ 100.202850][ C1] ffff8880a3b02d00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 100.210911][ C1] ffff8880a3b02d80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 100.218991][ C1] ================================================================== [ 100.227207][ C1] Disabling lock debugging due to kernel taint [ 100.233426][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 100.240018][ C1] CPU: 1 PID: 10059 Comm: syz-executor203 Tainted: G B 5.5.0-rc6-next-20200116-syzkaller #0 [ 100.251387][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.261434][ C1] Call Trace: [ 100.264714][ C1] [ 100.267590][ C1] dump_stack+0x197/0x210 [ 100.272049][ C1] panic+0x2e3/0x75c [ 100.275941][ C1] ? add_taint.cold+0x16/0x16 [ 100.280615][ C1] ? retint_kernel+0x2b/0x2b [ 100.285217][ C1] ? trace_hardirqs_on+0x5e/0x240 [ 100.290247][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 100.295098][ C1] end_report+0x47/0x4f [ 100.299850][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 100.304846][ C1] __kasan_report.cold+0xe/0x32 [ 100.309823][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 100.314679][ C1] kasan_report+0x12/0x20 [ 100.319059][ C1] check_memory_region+0x134/0x1a0 [ 100.324176][ C1] __kasan_check_read+0x11/0x20 [ 100.329032][ C1] bitmap_port_gc+0x112/0x4f0 [ 100.333704][ C1] call_timer_fn+0x1ac/0x780 [ 100.338291][ C1] ? bitmap_port_test+0x170/0x170 [ 100.343440][ C1] ? msleep_interruptible+0x150/0x150 [ 100.348855][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 100.355014][ C1] ? trace_hardirqs_on+0x67/0x240 [ 100.360085][ C1] ? bitmap_port_test+0x170/0x170 [ 100.365149][ C1] ? bitmap_port_test+0x170/0x170 [ 100.370169][ C1] run_timer_softirq+0x6c3/0x1790 [ 100.375392][ C1] ? add_timer+0x930/0x930 [ 100.379809][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 100.386022][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 100.391613][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 100.397789][ C1] ? trace_hardirqs_on+0x67/0x240 [ 100.402816][ C1] __do_softirq+0x262/0x98c [ 100.407516][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 100.412371][ C1] irq_exit+0x19b/0x1e0 [ 100.417473][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 100.423116][ C1] apic_timer_interrupt+0xf/0x20 [ 100.428132][ C1] [ 100.431138][ C1] RIP: 0010:write_comp_data+0x1e/0x70 [ 100.436508][ C1] Code: 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65 4c 8b 04 25 c0 1e 02 00 65 8b 05 58 86 8c 7e a9 00 01 1f 00 75 51 41 8b 80 88 13 00 00 <83> f8 03 75 45 49 8b 80 90 13 00 00 45 8b 80 8c 13 00 00 4c 8b 08 [ 100.457026][ C1] RSP: 0000:ffffc900033f7af8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 100.465518][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81a85d0d [ 100.473601][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ 100.481614][ C1] RBP: ffffc900033f7b00 R08: ffff88809ea46040 R09: fffff94000460e61 [ 100.489627][ C1] R10: fffff94000460e60 R11: ffffea0002307307 R12: ffffea0002307300 [ 100.497827][ C1] R13: ffff888090ea7148 R14: ffffea0002307300 R15: 0000000000000000 [ 100.505811][ C1] ? page_add_file_rmap+0x7d/0xd60 [ 100.510921][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 100.517148][ C1] page_add_file_rmap+0x7d/0xd60 [ 100.522126][ C1] alloc_set_pte+0x62b/0x17d0 [ 100.526818][ C1] ? rcu_read_lock_held_common+0x130/0x130 [ 100.532652][ C1] filemap_map_pages+0x1232/0x1510 [ 100.537827][ C1] ? filemap_page_mkwrite+0x310/0x310 [ 100.543194][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 100.549620][ C1] __handle_mm_fault+0x394a/0x3c20 [ 100.554735][ C1] ? apply_to_existing_page_range+0x50/0x50 [ 100.560616][ C1] ? handle_mm_fault+0x292/0xa50 [ 100.565553][ C1] ? handle_mm_fault+0x7a0/0xa50 [ 100.570482][ C1] ? __kasan_check_read+0x11/0x20 [ 100.575507][ C1] handle_mm_fault+0x3b2/0xa50 [ 100.580270][ C1] do_page_fault+0x545/0x12e1 [ 100.584991][ C1] page_fault+0x39/0x40 [ 100.589240][ C1] RIP: 0033:0x43fd5a [ 100.593144][ C1] Code: Bad RIP value. [ 100.597201][ C1] RSP: 002b:00007ffde30e2380 EFLAGS: 00010246 [ 100.603264][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000043fd5a [ 100.611230][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 100.619206][ C1] RBP: 00007ffde30e23a0 R08: 0000000000000000 R09: 0000000001756880 [ 100.627296][ C1] R10: 0000000001756b50 R11: 0000000000000246 R12: 0000000000000000 [ 100.635334][ C1] R13: 0000000000402250 R14: 0000000000000000 R15: 0000000000000000 [ 100.645100][ C1] Kernel Offset: disabled [ 100.649445][ C1] Rebooting in 86400 seconds..