[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 77.375690][ T26] audit: type=1800 audit(1579433746.487:25): pid=9296 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 77.404694][ T26] audit: type=1800 audit(1579433746.487:26): pid=9296 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 77.454383][ T26] audit: type=1800 audit(1579433746.487:27): pid=9296 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 '10.128.1.48' (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 syzkaller login: [ 107.574571][ C1] ================================================================== [ 107.582791][ C1] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc+0x112/0x4f0 [ 107.590321][ C1] Read of size 8 at addr ffff88809e32d9c0 by task syz-executor438/9812 [ 107.598535][ C1] [ 107.600849][ C1] CPU: 1 PID: 9812 Comm: syz-executor438 Not tainted 5.5.0-rc6-syzkaller #0 [ 107.609497][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 107.619537][ C1] Call Trace: [ 107.622806][ C1] [ 107.625653][ C1] dump_stack+0x197/0x210 [ 107.630014][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 107.634855][ C1] print_address_description.constprop.0.cold+0xd4/0x30b [ 107.641864][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 107.646699][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 107.651536][ C1] __kasan_report.cold+0x1b/0x41 [ 107.656461][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 107.661298][ C1] kasan_report+0x12/0x20 [ 107.665615][ C1] check_memory_region+0x134/0x1a0 [ 107.670714][ C1] __kasan_check_read+0x11/0x20 [ 107.675553][ C1] bitmap_port_gc+0x112/0x4f0 [ 107.680228][ C1] call_timer_fn+0x1ac/0x780 [ 107.684801][ C1] ? bitmap_port_test+0x170/0x170 [ 107.689812][ C1] ? msleep_interruptible+0x150/0x150 [ 107.695202][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 107.700386][ C1] ? trace_hardirqs_on+0x67/0x240 [ 107.705392][ C1] ? bitmap_port_test+0x170/0x170 [ 107.710399][ C1] ? bitmap_port_test+0x170/0x170 [ 107.715413][ C1] run_timer_softirq+0x6c3/0x1790 [ 107.720430][ C1] ? add_timer+0x930/0x930 [ 107.724877][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 107.731028][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 107.736560][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 107.742525][ C1] ? trace_hardirqs_on+0x67/0x240 [ 107.747542][ C1] __do_softirq+0x262/0x98c [ 107.752034][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 107.756873][ C1] irq_exit+0x19b/0x1e0 [ 107.761023][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 107.766570][ C1] apic_timer_interrupt+0xf/0x20 [ 107.771486][ C1] [ 107.774414][ C1] RIP: 0010:__percpu_up_read+0x0/0x60 [ 107.779805][ C1] Code: 5d c3 e8 23 f2 58 00 eb d2 48 89 45 e0 e8 38 f2 58 00 48 8b 45 e0 e9 53 ff ff ff e8 2a f2 58 00 eb 8a 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 53 48 89 fb f0 83 44 24 fc 00 48 c7 c7 c0 73 2b 88 e8 [ 107.799390][ C1] RSP: 0018:ffffc900036a7ce8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 107.807783][ C1] RAX: ffff8880a01d2600 RBX: 1ffff920006d4f9f RCX: ffffffff8149ce1e [ 107.815770][ C1] RDX: 0000000000000000 RSI: ffffffff8149d18d RDI: ffffffff899c66c0 [ 107.823726][ C1] RBP: ffffc900036a7d80 R08: ffff8880a01d2600 R09: ffffed1015d2703d [ 107.831801][ C1] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 0000000000000002 [ 107.839755][ C1] R13: 1ffffffff1338cd8 R14: ffffffff899c6720 R15: ffff8880a01d2b88 [ 107.847761][ C1] ? exit_signals+0x31e/0x960 [ 107.852434][ C1] ? exit_signals+0x68d/0x960 [ 107.857109][ C1] ? exit_signals+0x699/0x960 [ 107.861771][ C1] ? do_signal_stop+0x840/0x840 [ 107.866607][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 107.872834][ C1] ? __validate_process_creds+0x22d/0x380 [ 107.878545][ C1] do_exit+0x273/0x2f50 [ 107.882750][ C1] ? __kasan_check_write+0x14/0x20 [ 107.887868][ C1] ? mm_update_next_owner+0x7c0/0x7c0 [ 107.893224][ C1] ? down_read_non_owner+0x490/0x490 [ 107.898494][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 107.904759][ C1] ? handle_mm_fault+0x4ab/0xa50 [ 107.909717][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 107.915164][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 107.920621][ C1] do_group_exit+0x135/0x360 [ 107.925215][ C1] __x64_sys_exit_group+0x44/0x50 [ 107.930225][ C1] do_syscall_64+0xfa/0x790 [ 107.934717][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 107.940592][ C1] RIP: 0033:0x440008 [ 107.944474][ C1] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 107.964058][ C1] RSP: 002b:00007ffd980a6908 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 107.972455][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440008 [ 107.980411][ C1] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 107.988364][ C1] RBP: 00000000004bf890 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 107.996317][ C1] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000001 [ 108.004272][ C1] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 108.012294][ C1] [ 108.014669][ C1] Allocated by task 9449: [ 108.018982][ C1] save_stack+0x23/0x90 [ 108.023125][ C1] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 108.028839][ C1] kasan_kmalloc+0x9/0x10 [ 108.033150][ C1] __kmalloc+0x163/0x770 [ 108.037378][ C1] ip_set_alloc+0x38/0x5e [ 108.041692][ C1] bitmap_port_create+0x3dc/0x7c0 [ 108.046701][ C1] ip_set_create+0x6f1/0x1500 [ 108.051376][ C1] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 108.056300][ C1] netlink_rcv_skb+0x177/0x450 [ 108.061044][ C1] nfnetlink_rcv+0x1ba/0x460 [ 108.065612][ C1] netlink_unicast+0x58c/0x7d0 [ 108.070350][ C1] netlink_sendmsg+0x91c/0xea0 [ 108.075090][ C1] sock_sendmsg+0xd7/0x130 [ 108.079490][ C1] ____sys_sendmsg+0x753/0x880 [ 108.084240][ C1] ___sys_sendmsg+0x100/0x170 [ 108.088897][ C1] __sys_sendmsg+0x105/0x1d0 [ 108.093465][ C1] __x64_sys_sendmsg+0x78/0xb0 [ 108.098209][ C1] do_syscall_64+0xfa/0x790 [ 108.102730][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 108.108594][ C1] [ 108.110900][ C1] Freed by task 9193: [ 108.114862][ C1] save_stack+0x23/0x90 [ 108.118999][ C1] __kasan_slab_free+0x102/0x150 [ 108.123912][ C1] kasan_slab_free+0xe/0x10 [ 108.128400][ C1] kfree+0x10a/0x2c0 [ 108.132281][ C1] security_cred_free+0xa9/0x110 [ 108.137200][ C1] put_cred_rcu+0x129/0x4b0 [ 108.141679][ C1] __put_cred+0x1ef/0x270 [ 108.145986][ C1] do_faccessat+0x693/0x7f0 [ 108.150476][ C1] __x64_sys_access+0x59/0x80 [ 108.155140][ C1] do_syscall_64+0xfa/0x790 [ 108.159631][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 108.165501][ C1] [ 108.167827][ C1] The buggy address belongs to the object at ffff88809e32d9c0 [ 108.167827][ C1] which belongs to the cache kmalloc-32 of size 32 [ 108.181686][ C1] The buggy address is located 0 bytes inside of [ 108.181686][ C1] 32-byte region [ffff88809e32d9c0, ffff88809e32d9e0) [ 108.194770][ C1] The buggy address belongs to the page: [ 108.200385][ C1] page:ffffea000278cb40 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809e32dfc1 [ 108.210775][ C1] raw: 00fffe0000000200 ffffea00028e0588 ffffea0002813948 ffff8880aa4001c0 [ 108.219342][ C1] raw: ffff88809e32dfc1 ffff88809e32d000 0000000100000027 0000000000000000 [ 108.227901][ C1] page dumped because: kasan: bad access detected [ 108.234290][ C1] [ 108.236608][ C1] Memory state around the buggy address: [ 108.242225][ C1] ffff88809e32d880: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 108.250268][ C1] ffff88809e32d900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 108.258318][ C1] >ffff88809e32d980: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc [ 108.266365][ C1] ^ [ 108.272508][ C1] ffff88809e32da00: 00 04 fc fc fc fc fc fc 00 04 fc fc fc fc fc fc [ 108.280552][ C1] ffff88809e32da80: 00 04 fc fc fc fc fc fc 00 04 fc fc fc fc fc fc [ 108.288589][ C1] ================================================================== [ 108.296627][ C1] Disabling lock debugging due to kernel taint [ 108.302855][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 108.309435][ C1] CPU: 1 PID: 9812 Comm: syz-executor438 Tainted: G B 5.5.0-rc6-syzkaller #0 [ 108.319479][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 108.329521][ C1] Call Trace: [ 108.332796][ C1] [ 108.335645][ C1] dump_stack+0x197/0x210 [ 108.339961][ C1] panic+0x2e3/0x75c [ 108.343842][ C1] ? add_taint.cold+0x16/0x16 [ 108.348541][ C1] ? retint_kernel+0x2b/0x2b [ 108.353120][ C1] ? trace_hardirqs_on+0x5e/0x240 [ 108.358173][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 108.363018][ C1] end_report+0x47/0x4f [ 108.367157][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 108.371989][ C1] __kasan_report.cold+0xe/0x41 [ 108.376824][ C1] ? bitmap_port_gc+0x112/0x4f0 [ 108.381661][ C1] kasan_report+0x12/0x20 [ 108.385984][ C1] check_memory_region+0x134/0x1a0 [ 108.391087][ C1] __kasan_check_read+0x11/0x20 [ 108.395921][ C1] bitmap_port_gc+0x112/0x4f0 [ 108.400625][ C1] call_timer_fn+0x1ac/0x780 [ 108.405190][ C1] ? bitmap_port_test+0x170/0x170 [ 108.410192][ C1] ? msleep_interruptible+0x150/0x150 [ 108.415538][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 108.420711][ C1] ? trace_hardirqs_on+0x67/0x240 [ 108.425804][ C1] ? bitmap_port_test+0x170/0x170 [ 108.430812][ C1] ? bitmap_port_test+0x170/0x170 [ 108.435818][ C1] run_timer_softirq+0x6c3/0x1790 [ 108.440829][ C1] ? add_timer+0x930/0x930 [ 108.445253][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 108.451399][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 108.456928][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 108.462895][ C1] ? trace_hardirqs_on+0x67/0x240 [ 108.467926][ C1] __do_softirq+0x262/0x98c [ 108.472418][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 108.477253][ C1] irq_exit+0x19b/0x1e0 [ 108.481392][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 108.486922][ C1] apic_timer_interrupt+0xf/0x20 [ 108.491836][ C1] [ 108.494768][ C1] RIP: 0010:__percpu_up_read+0x0/0x60 [ 108.500125][ C1] Code: 5d c3 e8 23 f2 58 00 eb d2 48 89 45 e0 e8 38 f2 58 00 48 8b 45 e0 e9 53 ff ff ff e8 2a f2 58 00 eb 8a 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 53 48 89 fb f0 83 44 24 fc 00 48 c7 c7 c0 73 2b 88 e8 [ 108.519805][ C1] RSP: 0018:ffffc900036a7ce8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 108.528293][ C1] RAX: ffff8880a01d2600 RBX: 1ffff920006d4f9f RCX: ffffffff8149ce1e [ 108.536383][ C1] RDX: 0000000000000000 RSI: ffffffff8149d18d RDI: ffffffff899c66c0 [ 108.544361][ C1] RBP: ffffc900036a7d80 R08: ffff8880a01d2600 R09: ffffed1015d2703d [ 108.552342][ C1] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 0000000000000002 [ 108.560350][ C1] R13: 1ffffffff1338cd8 R14: ffffffff899c6720 R15: ffff8880a01d2b88 [ 108.568314][ C1] ? exit_signals+0x31e/0x960 [ 108.572974][ C1] ? exit_signals+0x68d/0x960 [ 108.577674][ C1] ? exit_signals+0x699/0x960 [ 108.582433][ C1] ? do_signal_stop+0x840/0x840 [ 108.587272][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 108.593490][ C1] ? __validate_process_creds+0x22d/0x380 [ 108.599186][ C1] do_exit+0x273/0x2f50 [ 108.603320][ C1] ? __kasan_check_write+0x14/0x20 [ 108.608410][ C1] ? mm_update_next_owner+0x7c0/0x7c0 [ 108.613764][ C1] ? down_read_non_owner+0x490/0x490 [ 108.619037][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 108.625254][ C1] ? handle_mm_fault+0x4ab/0xa50 [ 108.630169][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 108.635605][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 108.641050][ C1] do_group_exit+0x135/0x360 [ 108.645622][ C1] __x64_sys_exit_group+0x44/0x50 [ 108.650625][ C1] do_syscall_64+0xfa/0x790 [ 108.655118][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 108.660988][ C1] RIP: 0033:0x440008 [ 108.664862][ C1] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 108.684453][ C1] RSP: 002b:00007ffd980a6908 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 108.692839][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440008 [ 108.700831][ C1] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 108.708835][ C1] RBP: 00000000004bf890 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 108.716783][ C1] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000001 [ 108.724745][ C1] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 108.733929][ C1] Kernel Offset: disabled [ 108.738260][ C1] Rebooting in 86400 seconds..