[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 85.332928][ T9792] sshd (9792) used greatest stack depth: 22936 bytes left
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 85.650906][ T27] kauditd_printk_skb: 2 callbacks suppressed
[ 85.650919][ T27] audit: type=1800 audit(1579458376.819:29): pid=9727 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
[ 85.677736][ T27] audit: type=1800 audit(1579458376.819:30): pid=9727 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 '10.128.10.63' (ECDSA) to the list of known hosts.
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syzkaller login: [ 96.753221][ C1] ==================================================================
[ 96.761552][ C1] BUG: KASAN: slab-out-of-bounds in bitmap_port_gc+0x112/0x4f0
[ 96.769551][ C1] Read of size 8 at addr ffff88809e406e40 by task syz-executor290/10192
[ 96.777868][ C1]
[ 96.780197][ C1] CPU: 1 PID: 10192 Comm: syz-executor290 Not tainted 5.5.0-rc6-syzkaller #0
[ 96.789053][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 96.799200][ C1] Call Trace:
[ 96.802685][ C1]
[ 96.805616][ C1] dump_stack+0x197/0x210
[ 96.810039][ C1] ? bitmap_port_gc+0x112/0x4f0
[ 96.814965][ C1] print_address_description.constprop.0.cold+0xd4/0x30b
[ 96.822083][ C1] ? bitmap_port_gc+0x112/0x4f0
[ 96.826923][ C1] ? bitmap_port_gc+0x112/0x4f0
[ 96.831875][ C1] __kasan_report.cold+0x1b/0x41
[ 96.836804][ C1] ? bitmap_port_gc+0x112/0x4f0
[ 96.841916][ C1] kasan_report+0x12/0x20
[ 96.846244][ C1] check_memory_region+0x134/0x1a0
[ 96.851354][ C1] __kasan_check_read+0x11/0x20
[ 96.856247][ C1] bitmap_port_gc+0x112/0x4f0
[ 96.860921][ C1] call_timer_fn+0x1ac/0x780
[ 96.865614][ C1] ? bitmap_port_test+0x170/0x170
[ 96.870633][ C1] ? msleep_interruptible+0x150/0x150
[ 96.875999][ C1] ? run_timer_softirq+0x6b1/0x1790
[ 96.881479][ C1] ? trace_hardirqs_on+0x67/0x240
[ 96.886520][ C1] ? bitmap_port_test+0x170/0x170
[ 96.891539][ C1] ? bitmap_port_test+0x170/0x170
[ 96.896768][ C1] run_timer_softirq+0x6c3/0x1790
[ 96.901821][ C1] ? add_timer+0x930/0x930
[ 96.906362][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130
[ 96.912513][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 96.918178][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 96.924671][ C1] ? trace_hardirqs_on+0x67/0x240
[ 96.929831][ C1] __do_softirq+0x262/0x98c
[ 96.934623][ C1] ? sched_clock_cpu+0x1b/0x1b0
[ 96.939639][ C1] irq_exit+0x19b/0x1e0
[ 96.943845][ C1] smp_apic_timer_interrupt+0x1a3/0x610
[ 96.949494][ C1] apic_timer_interrupt+0xf/0x20
[ 96.954455][ C1]
[ 96.957398][ C1] RIP: 0010:kmem_cache_free+0xab/0x320
[ 96.963395][ C1] Code: e8 4a 29 00 00 84 c0 74 77 41 f7 c6 00 02 00 00 74 4f e8 68 21 c8 ff 48 83 3d 48 ca e0 07 00 0f 84 fa 01 00 00 4c 89 f7 57 9d <0f> 1f 44 00 00 4c 8b 6d 08 0f 1f 44 00 00 65 8b 05 e8 49 4f 7e 83
[ 96.983253][ C1] RSP: 0018:ffffc900033f7da8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 96.992281][ C1] RAX: 0000000000000007 RBX: ffff88809b7f2a28 RCX: 0000000000000000
[ 97.001209][ C1] RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000282
[ 97.009283][ C1] RBP: ffffc900033f7dc8 R08: ffff88809a4f6180 R09: 0000000000000000
[ 97.017592][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880aa5fde00
[ 97.025608][ C1] R13: ffffffff83572a23 R14: 0000000000000282 R15: ffff88809266d208
[ 97.033727][ C1] ? security_file_free+0xb3/0xe0
[ 97.038818][ C1] security_file_free+0xb3/0xe0
[ 97.043702][ C1] __fput+0x450/0x890
[ 97.047688][ C1] ____fput+0x16/0x20
[ 97.051756][ C1] task_work_run+0x145/0x1c0
[ 97.056524][ C1] exit_to_usermode_loop+0x316/0x380
[ 97.061925][ C1] do_syscall_64+0x676/0x790
[ 97.066520][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 97.072411][ C1] RIP: 0033:0x401140
[ 97.076325][ C1] Code: 01 f0 ff ff 0f 83 20 0c 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 8d 15 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 f4 0b 00 00 c3 48 83 ec 08 e8 5a 01 00 00
[ 97.096386][ C1] RSP: 002b:00007ffdeb1f44b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[ 97.104866][ C1] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000401140
[ 97.112833][ C1] RDX: 0000000000000004 RSI: 00007ffdeb1f44e0 RDI: 0000000000000003
[ 97.120978][ C1] RBP: 00007ffdeb1f44e0 R08: 0000000000000000 R09: 0000000000000004
[ 97.129108][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
[ 97.137076][ C1] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
[ 97.145236][ C1]
[ 97.147563][ C1] Allocated by task 9882:
[ 97.151895][ C1] save_stack+0x23/0x90
[ 97.156054][ C1] __kasan_kmalloc.constprop.0+0xcf/0xe0
[ 97.161831][ C1] kasan_kmalloc+0x9/0x10
[ 97.166281][ C1] __kmalloc+0x163/0x770
[ 97.170533][ C1] ip_set_alloc+0x38/0x5e
[ 97.175160][ C1] bitmap_port_create+0x3dc/0x7c0
[ 97.180308][ C1] ip_set_create+0x6f1/0x1500
[ 97.184981][ C1] nfnetlink_rcv_msg+0xcf2/0xfb0
[ 97.190264][ C1] netlink_rcv_skb+0x177/0x450
[ 97.195036][ C1] nfnetlink_rcv+0x1ba/0x460
[ 97.200302][ C1] netlink_unicast+0x58c/0x7d0
[ 97.205092][ C1] netlink_sendmsg+0x91c/0xea0
[ 97.210157][ C1] sock_sendmsg+0xd7/0x130
[ 97.215018][ C1] ____sys_sendmsg+0x753/0x880
[ 97.219788][ C1] ___sys_sendmsg+0x100/0x170
[ 97.224541][ C1] __sys_sendmsg+0x105/0x1d0
[ 97.229187][ C1] __x64_sys_sendmsg+0x78/0xb0
[ 97.234104][ C1] do_syscall_64+0xfa/0x790
[ 97.238649][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 97.244968][ C1]
[ 97.247339][ C1] Freed by task 9609:
[ 97.251463][ C1] save_stack+0x23/0x90
[ 97.255632][ C1] __kasan_slab_free+0x102/0x150
[ 97.260566][ C1] kasan_slab_free+0xe/0x10
[ 97.265131][ C1] kfree+0x10a/0x2c0
[ 97.269030][ C1] single_release+0x95/0xc0
[ 97.273586][ C1] __fput+0x2ff/0x890
[ 97.277766][ C1] ____fput+0x16/0x20
[ 97.282086][ C1] task_work_run+0x145/0x1c0
[ 97.286673][ C1] exit_to_usermode_loop+0x316/0x380
[ 97.291960][ C1] do_syscall_64+0x676/0x790
[ 97.296645][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 97.303041][ C1]
[ 97.305361][ C1] The buggy address belongs to the object at ffff88809e406e40
[ 97.305361][ C1] which belongs to the cache kmalloc-32 of size 32
[ 97.319357][ C1] The buggy address is located 0 bytes inside of
[ 97.319357][ C1] 32-byte region [ffff88809e406e40, ffff88809e406e60)
[ 97.332815][ C1] The buggy address belongs to the page:
[ 97.338590][ C1] page:ffffea0002790180 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809e406fc1
[ 97.349133][ C1] raw: 00fffe0000000200 ffffea00027726c8 ffffea0002898388 ffff8880aa4001c0
[ 97.357717][ C1] raw: ffff88809e406fc1 ffff88809e406000 000000010000003c 0000000000000000
[ 97.366389][ C1] page dumped because: kasan: bad access detected
[ 97.373077][ C1]
[ 97.375392][ C1] Memory state around the buggy address:
[ 97.381117][ C1] ffff88809e406d00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
[ 97.389433][ C1] ffff88809e406d80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
[ 97.398534][ C1] >ffff88809e406e00: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc
[ 97.407004][ C1] ^
[ 97.413149][ C1] ffff88809e406e80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
[ 97.421516][ C1] ffff88809e406f00: 06 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
[ 97.429773][ C1] ==================================================================
[ 97.438041][ C1] Disabling lock debugging due to kernel taint
[ 97.444361][ C1] Kernel panic - not syncing: panic_on_warn set ...
[ 97.451046][ C1] CPU: 1 PID: 10192 Comm: syz-executor290 Tainted: G B 5.5.0-rc6-syzkaller #0
[ 97.461200][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 97.471456][ C1] Call Trace:
[ 97.475556][ C1]
[ 97.478410][ C1] dump_stack+0x197/0x210
[ 97.482839][ C1] panic+0x2e3/0x75c
[ 97.486913][ C1] ? add_taint.cold+0x16/0x16
[ 97.491611][ C1] ? retint_kernel+0x2b/0x2b
[ 97.496209][ C1] ? trace_hardirqs_on+0x5e/0x240
[ 97.501358][ C1] ? bitmap_port_gc+0x112/0x4f0
[ 97.506204][ C1] end_report+0x47/0x4f
[ 97.510371][ C1] ? bitmap_port_gc+0x112/0x4f0
[ 97.515289][ C1] __kasan_report.cold+0xe/0x41
[ 97.520154][ C1] ? bitmap_port_gc+0x112/0x4f0
[ 97.525238][ C1] kasan_report+0x12/0x20
[ 97.529563][ C1] check_memory_region+0x134/0x1a0
[ 97.534695][ C1] __kasan_check_read+0x11/0x20
[ 97.539551][ C1] bitmap_port_gc+0x112/0x4f0
[ 97.544223][ C1] call_timer_fn+0x1ac/0x780
[ 97.548812][ C1] ? bitmap_port_test+0x170/0x170
[ 97.553959][ C1] ? msleep_interruptible+0x150/0x150
[ 97.559383][ C1] ? run_timer_softirq+0x6b1/0x1790
[ 97.564576][ C1] ? trace_hardirqs_on+0x67/0x240
[ 97.569602][ C1] ? bitmap_port_test+0x170/0x170
[ 97.574849][ C1] ? bitmap_port_test+0x170/0x170
[ 97.580016][ C1] run_timer_softirq+0x6c3/0x1790
[ 97.585053][ C1] ? add_timer+0x930/0x930
[ 97.589474][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130
[ 97.595640][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 97.601281][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 97.607257][ C1] ? trace_hardirqs_on+0x67/0x240
[ 97.612276][ C1] __do_softirq+0x262/0x98c
[ 97.616789][ C1] ? sched_clock_cpu+0x1b/0x1b0
[ 97.621660][ C1] irq_exit+0x19b/0x1e0
[ 97.625823][ C1] smp_apic_timer_interrupt+0x1a3/0x610
[ 97.631409][ C1] apic_timer_interrupt+0xf/0x20
[ 97.636728][ C1]
[ 97.639781][ C1] RIP: 0010:kmem_cache_free+0xab/0x320
[ 97.645414][ C1] Code: e8 4a 29 00 00 84 c0 74 77 41 f7 c6 00 02 00 00 74 4f e8 68 21 c8 ff 48 83 3d 48 ca e0 07 00 0f 84 fa 01 00 00 4c 89 f7 57 9d <0f> 1f 44 00 00 4c 8b 6d 08 0f 1f 44 00 00 65 8b 05 e8 49 4f 7e 83
[ 97.665115][ C1] RSP: 0018:ffffc900033f7da8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 97.673518][ C1] RAX: 0000000000000007 RBX: ffff88809b7f2a28 RCX: 0000000000000000
[ 97.681485][ C1] RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000282
[ 97.689453][ C1] RBP: ffffc900033f7dc8 R08: ffff88809a4f6180 R09: 0000000000000000
[ 97.697501][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880aa5fde00
[ 97.705617][ C1] R13: ffffffff83572a23 R14: 0000000000000282 R15: ffff88809266d208
[ 97.713634][ C1] ? security_file_free+0xb3/0xe0
[ 97.719097][ C1] security_file_free+0xb3/0xe0
[ 97.723965][ C1] __fput+0x450/0x890
[ 97.727967][ C1] ____fput+0x16/0x20
[ 97.732127][ C1] task_work_run+0x145/0x1c0
[ 97.736895][ C1] exit_to_usermode_loop+0x316/0x380
[ 97.742457][ C1] do_syscall_64+0x676/0x790
[ 97.747175][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 97.753505][ C1] RIP: 0033:0x401140
[ 97.758692][ C1] Code: 01 f0 ff ff 0f 83 20 0c 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 8d 15 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 f4 0b 00 00 c3 48 83 ec 08 e8 5a 01 00 00
[ 97.778766][ C1] RSP: 002b:00007ffdeb1f44b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[ 97.787460][ C1] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000401140
[ 97.795429][ C1] RDX: 0000000000000004 RSI: 00007ffdeb1f44e0 RDI: 0000000000000003
[ 97.803393][ C1] RBP: 00007ffdeb1f44e0 R08: 0000000000000000 R09: 0000000000000004
[ 97.811666][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
[ 97.819895][ C1] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
[ 97.829705][ C1] Kernel Offset: disabled
[ 97.834040][ C1] Rebooting in 86400 seconds..