[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 52.137267][ T26] audit: type=1800 audit(1579603260.158:25): pid=8390 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[ 52.168594][ T26] audit: type=1800 audit(1579603260.168:26): pid=8390 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[ 52.216868][ T26] audit: type=1800 audit(1579603260.168:27): pid=8390 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.1.11' (ECDSA) to the list of known hosts.
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syzkaller login: [ 79.718718][ C0] ==================================================================
[ 79.726976][ C0] BUG: KASAN: slab-out-of-bounds in bitmap_ipmac_gc+0x173/0x5d0
[ 79.734581][ C0] Read of size 8 at addr ffff88809e99f080 by task swapper/0/0
[ 79.742024][ C0]
[ 79.744334][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc7-syzkaller #0
[ 79.752236][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 79.762373][ C0] Call Trace:
[ 79.765637][ C0]
[ 79.768501][ C0] dump_stack+0x1fb/0x318
[ 79.772816][ C0] print_address_description+0x74/0x5c0
[ 79.778342][ C0] ? vprintk_default+0x28/0x30
[ 79.783136][ C0] ? vprintk_func+0x158/0x170
[ 79.787804][ C0] ? printk+0x62/0x8d
[ 79.791783][ C0] __kasan_report+0x149/0x1c0
[ 79.796537][ C0] ? bitmap_ipmac_gc+0x173/0x5d0
[ 79.801546][ C0] kasan_report+0x26/0x50
[ 79.805861][ C0] check_memory_region+0x2b6/0x2f0
[ 79.811124][ C0] __kasan_check_read+0x11/0x20
[ 79.815959][ C0] bitmap_ipmac_gc+0x173/0x5d0
[ 79.820755][ C0] ? bitmap_ipmac_create+0x840/0x840
[ 79.826064][ C0] call_timer_fn+0x95/0x170
[ 79.830590][ C0] ? bitmap_ipmac_create+0x840/0x840
[ 79.837942][ C0] __run_timers+0x776/0x970
[ 79.842433][ C0] ? check_preemption_disabled+0x44/0x260
[ 79.848258][ C0] ? debug_smp_processor_id+0x9/0x20
[ 79.853522][ C0] run_timer_softirq+0x4a/0x90
[ 79.858289][ C0] __do_softirq+0x283/0x7bd
[ 79.863468][ C0] ? irq_exit+0x227/0x230
[ 79.867790][ C0] irq_exit+0x227/0x230
[ 79.871943][ C0] smp_apic_timer_interrupt+0x113/0x280
[ 79.877578][ C0] apic_timer_interrupt+0xf/0x20
[ 79.882500][ C0]
[ 79.885429][ C0] RIP: 0010:native_safe_halt+0x12/0x20
[ 79.890888][ C0] Code: 89 d9 80 e1 07 80 c1 03 38 c1 7c ba 48 89 df e8 a4 bc b5 f9 eb b0 cc cc 55 48 89 e5 e9 07 00 00 00 0f 00 2d 12 9e 45 00 fb f4 <5d> c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 e9 07 00 00
[ 79.910604][ C0] RSP: 0018:ffffffff89007db8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 79.918992][ C0] RAX: 1ffffffff1215228 RBX: ffffffff89075a00 RCX: dffffc0000000000
[ 79.926940][ C0] RDX: 0000000000000000 RSI: ffffffff812bf90a RDI: ffffffff89076244
[ 79.934992][ C0] RBP: ffffffff89007db8 R08: ffffffff89076258 R09: fffffbfff120eb41
[ 79.942942][ C0] R10: fffffbfff120eb41 R11: 0000000000000000 R12: 1ffffffff120eb40
[ 79.950910][ C0] R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffffffff1215226
[ 79.958885][ C0] ? arch_cpu_idle+0xa/0x10
[ 79.963371][ C0] default_idle+0x50/0x70
[ 79.967679][ C0] arch_cpu_idle+0xa/0x10
[ 79.971985][ C0] default_idle_call+0x59/0xa0
[ 79.976742][ C0] do_idle+0x1ec/0x630
[ 79.980790][ C0] ? debug_smp_processor_id+0x1c/0x20
[ 79.986147][ C0] cpu_startup_entry+0x25/0x30
[ 79.990936][ C0] rest_init+0x29d/0x2b0
[ 79.995166][ C0] arch_call_rest_init+0xe/0x10
[ 80.000046][ C0] start_kernel+0x6d1/0x7d2
[ 80.004593][ C0] x86_64_start_reservations+0x18/0x2e
[ 80.010078][ C0] x86_64_start_kernel+0x7a/0x7d
[ 80.015002][ C0] secondary_startup_64+0xa4/0xb0
[ 80.020007][ C0]
[ 80.022315][ C0] Allocated by task 8543:
[ 80.026652][ C0] __kasan_kmalloc+0x118/0x1c0
[ 80.031419][ C0] kasan_kmalloc+0x9/0x10
[ 80.035737][ C0] __kmalloc+0x254/0x340
[ 80.039957][ C0] kzalloc+0x21/0x40
[ 80.043824][ C0] ip_set_alloc+0x32/0x60
[ 80.048129][ C0] bitmap_ipmac_create+0x3d9/0x840
[ 80.053216][ C0] ip_set_create+0x421/0xfd0
[ 80.057787][ C0] nfnetlink_rcv_msg+0x9ae/0xcd0
[ 80.062995][ C0] netlink_rcv_skb+0x19e/0x3e0
[ 80.067921][ C0] nfnetlink_rcv+0x1e0/0x1e50
[ 80.072593][ C0] netlink_unicast+0x767/0x920
[ 80.077346][ C0] netlink_sendmsg+0xa2c/0xd50
[ 80.082086][ C0] ____sys_sendmsg+0x4f7/0x7f0
[ 80.086932][ C0] __sys_sendmsg+0x1ed/0x290
[ 80.091496][ C0] __x64_sys_sendmsg+0x7f/0x90
[ 80.096236][ C0] do_syscall_64+0xf7/0x1c0
[ 80.101865][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 80.108748][ C0]
[ 80.111245][ C0] Freed by task 8240:
[ 80.115218][ C0] __kasan_slab_free+0x12e/0x1e0
[ 80.120158][ C0] kasan_slab_free+0xe/0x10
[ 80.124640][ C0] kfree+0x10d/0x220
[ 80.128516][ C0] tomoyo_check_open_permission+0x79c/0x9d0
[ 80.134447][ C0] tomoyo_file_open+0x141/0x190
[ 80.139281][ C0] security_file_open+0x50/0x2e0
[ 80.144264][ C0] do_dentry_open+0x351/0x10c0
[ 80.149011][ C0] vfs_open+0x73/0x80
[ 80.152970][ C0] path_openat+0x1367/0x4250
[ 80.157572][ C0] do_filp_open+0x192/0x3d0
[ 80.162664][ C0] do_sys_open+0x29f/0x560
[ 80.167716][ C0] __x64_sys_open+0x87/0x90
[ 80.172197][ C0] do_syscall_64+0xf7/0x1c0
[ 80.176726][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 80.182707][ C0]
[ 80.185018][ C0] The buggy address belongs to the object at ffff88809e99f080
[ 80.185018][ C0] which belongs to the cache kmalloc-32 of size 32
[ 80.198885][ C0] The buggy address is located 0 bytes inside of
[ 80.198885][ C0] 32-byte region [ffff88809e99f080, ffff88809e99f0a0)
[ 80.211933][ C0] The buggy address belongs to the page:
[ 80.217592][ C0] page:ffffea00027a67c0 refcount:1 mapcount:0 mapping:ffff8880aa8001c0 index:0xffff88809e99ffc1
[ 80.227982][ C0] raw: 00fffe0000000200 ffffea00029e5908 ffffea00029b46c8 ffff8880aa8001c0
[ 80.236554][ C0] raw: ffff88809e99ffc1 ffff88809e99f000 000000010000003d 0000000000000000
[ 80.245125][ C0] page dumped because: kasan: bad access detected
[ 80.251524][ C0]
[ 80.253829][ C0] Memory state around the buggy address:
[ 80.259441][ C0] ffff88809e99ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 80.268531][ C0] ffff88809e99f000: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
[ 80.276566][ C0] >ffff88809e99f080: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
[ 80.284627][ C0] ^
[ 80.288692][ C0] ffff88809e99f100: 00 00 01 fc fc fc fc fc fb fb fb fb fc fc fc fc
[ 80.296896][ C0] ffff88809e99f180: fb fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc
[ 80.304976][ C0] ==================================================================
[ 80.313023][ C0] Disabling lock debugging due to kernel taint
[ 80.319194][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 80.325832][ C0] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B 5.5.0-rc7-syzkaller #0
[ 80.335110][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 80.345420][ C0] Call Trace:
[ 80.348683][ C0]
[ 80.351556][ C0] dump_stack+0x1fb/0x318
[ 80.355871][ C0] panic+0x264/0x7a9
[ 80.359746][ C0] ? __kasan_report+0x193/0x1c0
[ 80.365667][ C0] ? trace_hardirqs_on+0x34/0x80
[ 80.370582][ C0] ? _raw_spin_unlock_irqrestore+0xa8/0xe0
[ 80.376464][ C0] __kasan_report+0x1b9/0x1c0
[ 80.381180][ C0] ? bitmap_ipmac_gc+0x173/0x5d0
[ 80.386096][ C0] kasan_report+0x26/0x50
[ 80.390458][ C0] check_memory_region+0x2b6/0x2f0
[ 80.395623][ C0] __kasan_check_read+0x11/0x20
[ 80.401473][ C0] bitmap_ipmac_gc+0x173/0x5d0
[ 80.406232][ C0] ? bitmap_ipmac_create+0x840/0x840
[ 80.411503][ C0] call_timer_fn+0x95/0x170
[ 80.416042][ C0] ? bitmap_ipmac_create+0x840/0x840
[ 80.421367][ C0] __run_timers+0x776/0x970
[ 80.425963][ C0] ? check_preemption_disabled+0x44/0x260
[ 80.432245][ C0] ? debug_smp_processor_id+0x9/0x20
[ 80.437549][ C0] run_timer_softirq+0x4a/0x90
[ 80.442327][ C0] __do_softirq+0x283/0x7bd
[ 80.446802][ C0] ? irq_exit+0x227/0x230
[ 80.451146][ C0] irq_exit+0x227/0x230
[ 80.455289][ C0] smp_apic_timer_interrupt+0x113/0x280
[ 80.460812][ C0] apic_timer_interrupt+0xf/0x20
[ 80.465995][ C0]
[ 80.468929][ C0] RIP: 0010:native_safe_halt+0x12/0x20
[ 80.474377][ C0] Code: 89 d9 80 e1 07 80 c1 03 38 c1 7c ba 48 89 df e8 a4 bc b5 f9 eb b0 cc cc 55 48 89 e5 e9 07 00 00 00 0f 00 2d 12 9e 45 00 fb f4 <5d> c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 e9 07 00 00
[ 80.493982][ C0] RSP: 0018:ffffffff89007db8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 80.502460][ C0] RAX: 1ffffffff1215228 RBX: ffffffff89075a00 RCX: dffffc0000000000
[ 80.510458][ C0] RDX: 0000000000000000 RSI: ffffffff812bf90a RDI: ffffffff89076244
[ 80.518445][ C0] RBP: ffffffff89007db8 R08: ffffffff89076258 R09: fffffbfff120eb41
[ 80.526403][ C0] R10: fffffbfff120eb41 R11: 0000000000000000 R12: 1ffffffff120eb40
[ 80.534358][ C0] R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffffffff1215226
[ 80.542336][ C0] ? arch_cpu_idle+0xa/0x10
[ 80.546819][ C0] default_idle+0x50/0x70
[ 80.551148][ C0] arch_cpu_idle+0xa/0x10
[ 80.555462][ C0] default_idle_call+0x59/0xa0
[ 80.560200][ C0] do_idle+0x1ec/0x630
[ 80.565049][ C0] ? debug_smp_processor_id+0x1c/0x20
[ 80.570434][ C0] cpu_startup_entry+0x25/0x30
[ 80.575177][ C0] rest_init+0x29d/0x2b0
[ 80.579425][ C0] arch_call_rest_init+0xe/0x10
[ 80.584251][ C0] start_kernel+0x6d1/0x7d2
[ 80.588754][ C0] x86_64_start_reservations+0x18/0x2e
[ 80.594191][ C0] x86_64_start_kernel+0x7a/0x7d
[ 80.599235][ C0] secondary_startup_64+0xa4/0xb0
[ 80.605411][ C0] Kernel Offset: disabled
[ 80.609730][ C0] Rebooting in 86400 seconds..