[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 87.839537][ T27] audit: type=1800 audit(1579365330.457:25): pid=9586 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 87.859225][ T27] audit: type=1800 audit(1579365330.457:26): pid=9586 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 87.916398][ T27] audit: type=1800 audit(1579365330.457:27): pid=9586 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 '10.128.0.149' (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 syzkaller login: [ 97.425582][ T9742] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 98.498601][ C0] ================================================================== [ 98.506856][ C0] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc+0x112/0x4f0 [ 98.515506][ C0] Read of size 8 at addr ffff888095c14f40 by task syz-executor831/9742 [ 98.524096][ C0] [ 98.526416][ C0] CPU: 0 PID: 9742 Comm: syz-executor831 Not tainted 5.5.0-rc6-syzkaller #0 [ 98.535070][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 98.545552][ C0] Call Trace: [ 98.548829][ C0] [ 98.551680][ C0] dump_stack+0x197/0x210 [ 98.556452][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 98.561369][ C0] print_address_description.constprop.0.cold+0xd4/0x30b [ 98.568996][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 98.574280][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 98.579140][ C0] __kasan_report.cold+0x1b/0x41 [ 98.584058][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 98.589062][ C0] kasan_report+0x12/0x20 [ 98.593901][ C0] check_memory_region+0x134/0x1a0 [ 98.598999][ C0] __kasan_check_read+0x11/0x20 [ 98.603836][ C0] bitmap_port_gc+0x112/0x4f0 [ 98.608516][ C0] call_timer_fn+0x1ac/0x780 [ 98.613124][ C0] ? bitmap_port_test+0x170/0x170 [ 98.618175][ C0] ? msleep_interruptible+0x150/0x150 [ 98.624335][ C0] ? run_timer_softirq+0x6b1/0x1790 [ 98.629528][ C0] ? trace_hardirqs_on+0x67/0x240 [ 98.634707][ C0] ? bitmap_port_test+0x170/0x170 [ 98.639719][ C0] ? bitmap_port_test+0x170/0x170 [ 98.644741][ C0] run_timer_softirq+0x6c3/0x1790 [ 98.649753][ C0] ? add_timer+0x930/0x930 [ 98.654525][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 98.660663][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 98.666197][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 98.672165][ C0] ? trace_hardirqs_on+0x67/0x240 [ 98.677171][ C0] __do_softirq+0x262/0x98c [ 98.681662][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 98.686503][ C0] irq_exit+0x19b/0x1e0 [ 98.690643][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 98.697055][ C0] apic_timer_interrupt+0xf/0x20 [ 98.701996][ C0] [ 98.704916][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x90/0xe0 [ 98.711316][ C0] Code: 48 c7 c0 d8 34 93 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d 8f fb be 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 21 51 7c f9 65 8b 05 22 e5 2d 78 [ 98.730902][ C0] RSP: 0018:ffffc900020f7c00 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 98.739296][ C0] RAX: 1ffffffff132669b RBX: 0000000000000282 RCX: 0000000000000000 [ 98.747250][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000282 [ 98.755204][ C0] RBP: ffffc900020f7c10 R08: ffff8880892680c0 R09: 0000000000000000 [ 98.763165][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888098c1eb18 [ 98.771140][ C0] R13: ffffc900020f7cc0 R14: 0000000000000001 R15: ffff888098c1e340 [ 98.779111][ C0] wake_up_new_task+0x648/0xbd0 [ 98.783940][ C0] ? to_ratio+0x20/0x20 [ 98.788078][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 98.793794][ C0] _do_fork+0x26c/0x1090 [ 98.798015][ C0] ? copy_init_mm+0x20/0x20 [ 98.802500][ C0] ? __do_sys_wait4+0xbd/0x160 [ 98.807241][ C0] ? kernel_wait4+0x290/0x290 [ 98.811899][ C0] ? _copy_to_user+0x118/0x160 [ 98.816642][ C0] __x64_sys_clone+0x19a/0x260 [ 98.821382][ C0] ? __ia32_sys_vfork+0xd0/0xd0 [ 98.826213][ C0] ? lockdep_hardirqs_on+0x421/0x5e0 [ 98.831488][ C0] ? trace_hardirqs_on+0x67/0x240 [ 98.836493][ C0] do_syscall_64+0xfa/0x790 [ 98.840981][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.846859][ C0] RIP: 0033:0x43fe3a [ 98.850751][ C0] Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 [ 98.870335][ C0] RSP: 002b:00007fff72e61500 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 98.878721][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043fe3a [ 98.886669][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 98.894618][ C0] RBP: 00007fff72e61520 R08: 0000000000000001 R09: 0000000002431880 [ 98.902654][ C0] R10: 0000000002431b50 R11: 0000000000000246 R12: 0000000000000001 [ 98.910602][ C0] R13: 0000000000402450 R14: 0000000000000000 R15: 0000000000000000 [ 98.918577][ C0] [ 98.920918][ C0] Allocated by task 9743: [ 98.925241][ C0] save_stack+0x23/0x90 [ 98.929371][ C0] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 98.935026][ C0] kasan_kmalloc+0x9/0x10 [ 98.939338][ C0] __kmalloc+0x163/0x770 [ 98.943567][ C0] ip_set_alloc+0x38/0x5e [ 98.947878][ C0] bitmap_port_create+0x3dc/0x7c0 [ 98.952881][ C0] ip_set_create+0x6f1/0x1500 [ 98.957564][ C0] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 98.962478][ C0] netlink_rcv_skb+0x177/0x450 [ 98.967219][ C0] nfnetlink_rcv+0x1ba/0x460 [ 98.971788][ C0] netlink_unicast+0x58c/0x7d0 [ 98.976547][ C0] netlink_sendmsg+0x91c/0xea0 [ 98.981307][ C0] sock_sendmsg+0xd7/0x130 [ 98.985749][ C0] ____sys_sendmsg+0x753/0x880 [ 98.990559][ C0] ___sys_sendmsg+0x100/0x170 [ 98.995231][ C0] __sys_sendmsg+0x105/0x1d0 [ 99.000063][ C0] __x64_sys_sendmsg+0x78/0xb0 [ 99.005674][ C0] do_syscall_64+0xfa/0x790 [ 99.010195][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.016058][ C0] [ 99.018371][ C0] Freed by task 9468: [ 99.022334][ C0] save_stack+0x23/0x90 [ 99.026471][ C0] __kasan_slab_free+0x102/0x150 [ 99.031394][ C0] kasan_slab_free+0xe/0x10 [ 99.035881][ C0] kfree+0x10a/0x2c0 [ 99.039752][ C0] single_release+0x95/0xc0 [ 99.044232][ C0] __fput+0x2ff/0x890 [ 99.048191][ C0] ____fput+0x16/0x20 [ 99.052160][ C0] task_work_run+0x145/0x1c0 [ 99.056727][ C0] exit_to_usermode_loop+0x316/0x380 [ 99.061991][ C0] do_syscall_64+0x676/0x790 [ 99.066568][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.072526][ C0] [ 99.074843][ C0] The buggy address belongs to the object at ffff888095c14f40 [ 99.074843][ C0] which belongs to the cache kmalloc-32 of size 32 [ 99.088707][ C0] The buggy address is located 0 bytes inside of [ 99.088707][ C0] 32-byte region [ffff888095c14f40, ffff888095c14f60) [ 99.102654][ C0] The buggy address belongs to the page: [ 99.108274][ C0] page:ffffea0002570500 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff888095c14fc1 [ 99.118663][ C0] raw: 00fffe0000000200 ffffea00025c5248 ffffea0002548c48 ffff8880aa4001c0 [ 99.127228][ C0] raw: ffff888095c14fc1 ffff888095c14000 000000010000002c 0000000000000000 [ 99.135785][ C0] page dumped because: kasan: bad access detected [ 99.143132][ C0] [ 99.145435][ C0] Memory state around the buggy address: [ 99.151183][ C0] ffff888095c14e00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 99.159232][ C0] ffff888095c14e80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 99.167269][ C0] >ffff888095c14f00: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc [ 99.175303][ C0] ^ [ 99.182323][ C0] ffff888095c14f80: 00 01 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 99.190381][ C0] ffff888095c15000: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 99.198414][ C0] ================================================================== [ 99.206536][ C0] Disabling lock debugging due to kernel taint [ 99.212708][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 99.219287][ C0] CPU: 0 PID: 9742 Comm: syz-executor831 Tainted: G B 5.5.0-rc6-syzkaller #0 [ 99.229319][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.239361][ C0] Call Trace: [ 99.242634][ C0] [ 99.245468][ C0] dump_stack+0x197/0x210 [ 99.249778][ C0] panic+0x2e3/0x75c [ 99.253650][ C0] ? add_taint.cold+0x16/0x16 [ 99.258301][ C0] ? retint_kernel+0x2b/0x2b [ 99.262907][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 99.267909][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 99.272753][ C0] end_report+0x47/0x4f [ 99.276887][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 99.281715][ C0] __kasan_report.cold+0xe/0x41 [ 99.286556][ C0] ? bitmap_port_gc+0x112/0x4f0 [ 99.291381][ C0] kasan_report+0x12/0x20 [ 99.295687][ C0] check_memory_region+0x134/0x1a0 [ 99.300785][ C0] __kasan_check_read+0x11/0x20 [ 99.305609][ C0] bitmap_port_gc+0x112/0x4f0 [ 99.310270][ C0] call_timer_fn+0x1ac/0x780 [ 99.314834][ C0] ? bitmap_port_test+0x170/0x170 [ 99.319843][ C0] ? msleep_interruptible+0x150/0x150 [ 99.325191][ C0] ? run_timer_softirq+0x6b1/0x1790 [ 99.330374][ C0] ? trace_hardirqs_on+0x67/0x240 [ 99.335380][ C0] ? bitmap_port_test+0x170/0x170 [ 99.340377][ C0] ? bitmap_port_test+0x170/0x170 [ 99.345378][ C0] run_timer_softirq+0x6c3/0x1790 [ 99.350386][ C0] ? add_timer+0x930/0x930 [ 99.354778][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 99.361610][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 99.367141][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 99.373098][ C0] ? trace_hardirqs_on+0x67/0x240 [ 99.378111][ C0] __do_softirq+0x262/0x98c [ 99.382594][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 99.387433][ C0] irq_exit+0x19b/0x1e0 [ 99.391566][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 99.397444][ C0] apic_timer_interrupt+0xf/0x20 [ 99.402355][ C0] [ 99.405273][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x90/0xe0 [ 99.411663][ C0] Code: 48 c7 c0 d8 34 93 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d 8f fb be 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 21 51 7c f9 65 8b 05 22 e5 2d 78 [ 99.431244][ C0] RSP: 0018:ffffc900020f7c00 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 99.439634][ C0] RAX: 1ffffffff132669b RBX: 0000000000000282 RCX: 0000000000000000 [ 99.447594][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000282 [ 99.455550][ C0] RBP: ffffc900020f7c10 R08: ffff8880892680c0 R09: 0000000000000000 [ 99.463533][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888098c1eb18 [ 99.471488][ C0] R13: ffffc900020f7cc0 R14: 0000000000000001 R15: ffff888098c1e340 [ 99.480068][ C0] wake_up_new_task+0x648/0xbd0 [ 99.484922][ C0] ? to_ratio+0x20/0x20 [ 99.489072][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 99.494862][ C0] _do_fork+0x26c/0x1090 [ 99.499091][ C0] ? copy_init_mm+0x20/0x20 [ 99.503572][ C0] ? __do_sys_wait4+0xbd/0x160 [ 99.508316][ C0] ? kernel_wait4+0x290/0x290 [ 99.513009][ C0] ? _copy_to_user+0x118/0x160 [ 99.517756][ C0] __x64_sys_clone+0x19a/0x260 [ 99.522506][ C0] ? __ia32_sys_vfork+0xd0/0xd0 [ 99.527348][ C0] ? lockdep_hardirqs_on+0x421/0x5e0 [ 99.532632][ C0] ? trace_hardirqs_on+0x67/0x240 [ 99.537636][ C0] do_syscall_64+0xfa/0x790 [ 99.542123][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.548178][ C0] RIP: 0033:0x43fe3a [ 99.552065][ C0] Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 [ 99.571646][ C0] RSP: 002b:00007fff72e61500 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 99.580332][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043fe3a [ 99.588288][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 99.596856][ C0] RBP: 00007fff72e61520 R08: 0000000000000001 R09: 0000000002431880 [ 99.604817][ C0] R10: 0000000002431b50 R11: 0000000000000246 R12: 0000000000000001 [ 99.612793][ C0] R13: 0000000000402450 R14: 0000000000000000 R15: 0000000000000000 [ 99.622328][ C0] Kernel Offset: disabled [ 99.627080][ C0] Rebooting in 86400 seconds..