[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 88.487479][ T26] audit: type=1800 audit(1579559156.114:25): pid=9301 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 88.515338][ T26] audit: type=1800 audit(1579559156.114:26): pid=9301 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 88.545135][ T26] audit: type=1800 audit(1579559156.124:27): pid=9301 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 '10.128.0.129' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 99.325524][ C1] ================================================================== [ 99.333782][ C1] BUG: KASAN: slab-out-of-bounds in bitmap_ipmac_gc+0x119/0x590 [ 99.341410][ C1] Read of size 8 at addr ffff8880a88a1dc0 by task swapper/1/0 [ 99.348860][ C1] [ 99.351227][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc6-syzkaller #0 [ 99.359116][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.369180][ C1] Call Trace: [ 99.372473][ C1] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.375335][ C1] dump_stack+0x197/0x210 [ 99.379675][ C1] ? bitmap_ipmac_gc+0x119/0x590 [ 99.384673][ C1] print_address_description.constprop.0.cold+0xd4/0x30b [ 99.391731][ C1] ? bitmap_ipmac_gc+0x119/0x590 [ 99.396679][ C1] ? bitmap_ipmac_gc+0x119/0x590 [ 99.401628][ C1] __kasan_report.cold+0x1b/0x41 [ 99.406578][ C1] ? bitmap_ipmac_gc+0x119/0x590 [ 99.411529][ C1] kasan_report+0x12/0x20 [ 99.415866][ C1] check_memory_region+0x134/0x1a0 [ 99.420989][ C1] __kasan_check_read+0x11/0x20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.425857][ C1] bitmap_ipmac_gc+0x119/0x590 [ 99.430641][ C1] call_timer_fn+0x1ac/0x780 [ 99.435241][ C1] ? bitmap_ipmac_list+0x1080/0x1080 [ 99.440535][ C1] ? msleep_interruptible+0x150/0x150 [ 99.445913][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 99.451130][ C1] ? trace_hardirqs_on+0x67/0x240 [ 99.456213][ C1] ? bitmap_ipmac_list+0x1080/0x1080 [ 99.461514][ C1] ? bitmap_ipmac_list+0x1080/0x1080 [ 99.466814][ C1] run_timer_softirq+0x6c3/0x1790 [ 99.471860][ C1] ? add_timer+0x930/0x930 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.476293][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 99.482474][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 99.488025][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 99.494009][ C1] ? trace_hardirqs_on+0x67/0x240 [ 99.499052][ C1] __do_softirq+0x262/0x98c [ 99.503571][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 99.508440][ C1] irq_exit+0x19b/0x1e0 [ 99.512602][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 99.518149][ C1] apic_timer_interrupt+0xf/0x20 [ 99.523086][ C1] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.526038][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 99.531421][ C1] Code: b8 3c d9 f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d f4 f5 4e 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d e4 f5 4e 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 9e 0c 89 f9 e8 59 [ 99.551042][ C1] RSP: 0018:ffffc90000d3fd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 99.559467][ C1] RAX: 1ffffffff1326676 RBX: ffff8880a99fc340 RCX: 0000000000000000 [ 99.567453][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a99fcbd4 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.575542][ C1] RBP: ffffc90000d3fd98 R08: ffff8880a99fc340 R09: 0000000000000000 [ 99.583514][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 99.591614][ C1] R13: ffffffff8a7c8a80 R14: 0000000000000000 R15: 0000000000000001 [ 99.599612][ C1] ? default_idle+0x4e/0x360 [ 99.604208][ C1] arch_cpu_idle+0xa/0x10 [ 99.608549][ C1] default_idle_call+0x84/0xb0 [ 99.613325][ C1] do_idle+0x3c8/0x6e0 [ 99.617409][ C1] ? arch_cpu_idle_exit+0x80/0x80 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.622444][ C1] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 99.628255][ C1] ? complete+0x61/0x80 [ 99.632419][ C1] cpu_startup_entry+0x1b/0x20 [ 99.637192][ C1] start_secondary+0x2f4/0x410 [ 99.641997][ C1] ? set_cpu_sibling_map+0x2140/0x2140 [ 99.647486][ C1] secondary_startup_64+0xa4/0xb0 [ 99.652524][ C1] [ 99.654854][ C1] Allocated by task 9454: [ 99.659190][ C1] save_stack+0x23/0x90 [ 99.663352][ C1] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 99.668990][ C1] kasan_kmalloc+0x9/0x10 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.673328][ C1] __kmalloc+0x163/0x770 [ 99.677578][ C1] ip_set_alloc+0x38/0x5e [ 99.681922][ C1] bitmap_ipmac_create+0x4e8/0xa00 [ 99.687159][ C1] ip_set_create+0x6f1/0x1500 [ 99.691958][ C1] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 99.696906][ C1] netlink_rcv_skb+0x177/0x450 [ 99.701681][ C1] nfnetlink_rcv+0x1ba/0x460 [ 99.706278][ C1] netlink_unicast+0x59e/0x7e0 [ 99.711048][ C1] netlink_sendmsg+0x91c/0xea0 [ 99.715820][ C1] sock_sendmsg+0xd7/0x130 [ 99.720243][ C1] ____sys_sendmsg+0x753/0x880 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.725015][ C1] ___sys_sendmsg+0x100/0x170 [ 99.729705][ C1] __sys_sendmsg+0x105/0x1d0 [ 99.734301][ C1] __x64_sys_sendmsg+0x78/0xb0 [ 99.739075][ C1] do_syscall_64+0xfa/0x790 [ 99.743588][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.749587][ C1] [ 99.751922][ C1] Freed by task 9182: [ 99.755900][ C1] save_stack+0x23/0x90 [ 99.760065][ C1] __kasan_slab_free+0x102/0x150 [ 99.765013][ C1] kasan_slab_free+0xe/0x10 [ 99.769536][ C1] kfree+0x10a/0x2c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.773449][ C1] tomoyo_path_perm+0x24e/0x430 [ 99.778309][ C1] tomoyo_inode_getattr+0x1d/0x30 [ 99.783342][ C1] security_inode_getattr+0xf2/0x150 [ 99.788652][ C1] vfs_getattr+0x25/0x70 [ 99.792901][ C1] vfs_statx+0x157/0x200 [ 99.797153][ C1] __do_sys_newstat+0xa4/0x130 [ 99.801923][ C1] __x64_sys_newstat+0x54/0x80 [ 99.806696][ C1] do_syscall_64+0xfa/0x790 [ 99.811218][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.817108][ C1] [ 99.819458][ C1] The buggy address belongs to the object at ffff8880a88a1dc0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.819458][ C1] which belongs to the cache kmalloc-32 of size 32 [ 99.833464][ C1] The buggy address is located 0 bytes inside of [ 99.833464][ C1] 32-byte region [ffff8880a88a1dc0, ffff8880a88a1de0) [ 99.846475][ C1] The buggy address belongs to the page: [ 99.852117][ C1] page:ffffea0002a22840 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880a88a1fc1 [ 99.862534][ C1] raw: 00fffe0000000200 ffffea00025a1188 ffffea000262f348 ffff8880aa4001c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.871373][ C1] raw: ffff8880a88a1fc1 ffff8880a88a1000 0000000100000023 0000000000000000 [ 99.879964][ C1] page dumped because: kasan: bad access detected [ 99.886378][ C1] [ 99.888755][ C1] Memory state around the buggy address: [ 99.894387][ C1] ffff8880a88a1c80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 99.902494][ C1] ffff8880a88a1d00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 99.910567][ C1] >ffff8880a88a1d80: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc [ 99.918631][ C1] ^ executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.924788][ C1] ffff8880a88a1e00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 99.932857][ C1] ffff8880a88a1e80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 99.940921][ C1] ================================================================== [ 99.948986][ C1] Disabling lock debugging due to kernel taint [ 99.955262][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 99.961873][ C1] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B 5.5.0-rc6-syzkaller #0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.971166][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.981226][ C1] Call Trace: [ 99.984516][ C1] [ 99.987376][ C1] dump_stack+0x197/0x210 [ 99.991714][ C1] panic+0x2e3/0x75c [ 99.995614][ C1] ? add_taint.cold+0x16/0x16 [ 100.000293][ C1] ? retint_kernel+0x2b/0x2b [ 100.004894][ C1] ? trace_hardirqs_on+0x5e/0x240 [ 100.010034][ C1] ? bitmap_ipmac_gc+0x119/0x590 [ 100.014982][ C1] end_report+0x47/0x4f [ 100.019146][ C1] ? bitmap_ipmac_gc+0x119/0x590 [ 100.024090][ C1] __kasan_report.cold+0xe/0x41 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 100.028941][ C1] ? bitmap_ipmac_gc+0x119/0x590 [ 100.033897][ C1] kasan_report+0x12/0x20 [ 100.038255][ C1] check_memory_region+0x134/0x1a0 [ 100.043371][ C1] __kasan_check_read+0x11/0x20 [ 100.048214][ C1] bitmap_ipmac_gc+0x119/0x590 [ 100.052988][ C1] call_timer_fn+0x1ac/0x780 [ 100.057582][ C1] ? bitmap_ipmac_list+0x1080/0x1080 [ 100.062977][ C1] ? msleep_interruptible+0x150/0x150 [ 100.068354][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 100.073551][ C1] ? trace_hardirqs_on+0x67/0x240 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 100.078580][ C1] ? bitmap_ipmac_list+0x1080/0x1080 [ 100.083869][ C1] ? bitmap_ipmac_list+0x1080/0x1080 [ 100.089183][ C1] run_timer_softirq+0x6c3/0x1790 [ 100.094230][ C1] ? add_timer+0x930/0x930 [ 100.098682][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 100.104847][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 100.110390][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 100.116373][ C1] ? trace_hardirqs_on+0x67/0x240 [ 100.121409][ C1] __do_softirq+0x262/0x98c executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 100.125921][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 100.130788][ C1] irq_exit+0x19b/0x1e0 [ 100.134944][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 100.140487][ C1] apic_timer_interrupt+0xf/0x20 [ 100.145417][ C1] [ 100.148381][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 100.153752][ C1] Code: b8 3c d9 f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d f4 f5 4e 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d e4 f5 4e 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 9e 0c 89 f9 e8 59 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 100.173351][ C1] RSP: 0018:ffffc90000d3fd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 100.181752][ C1] RAX: 1ffffffff1326676 RBX: ffff8880a99fc340 RCX: 0000000000000000 [ 100.189838][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a99fcbd4 [ 100.197814][ C1] RBP: ffffc90000d3fd98 R08: ffff8880a99fc340 R09: 0000000000000000 [ 100.205931][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 100.213901][ C1] R13: ffffffff8a7c8a80 R14: 0000000000000000 R15: 0000000000000001 [ 100.221884][ C1] ? default_idle+0x4e/0x360 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 100.226481][ C1] arch_cpu_idle+0xa/0x10 [ 100.230817][ C1] default_idle_call+0x84/0xb0 [ 100.235585][ C1] do_idle+0x3c8/0x6e0 [ 100.239664][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 100.244699][ C1] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 100.250510][ C1] ? complete+0x61/0x80 [ 100.254673][ C1] cpu_startup_entry+0x1b/0x20 [ 100.259445][ C1] start_secondary+0x2f4/0x410 [ 100.264213][ C1] ? set_cpu_sibling_map+0x2140/0x2140 [ 100.269676][ C1] secondary_startup_64+0xa4/0xb0 [ 100.275803][ C1] Kernel Offset: disabled [ 100.280123][ C1] Rebooting in 86400 seconds..