[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 91.432145][ T27] audit: type=1400 audit(1579487630.789:37): avc: denied { watch } for pid=11099 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16179 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [ 91.481924][ T27] audit: type=1400 audit(1579487630.809:38): avc: denied { watch } for pid=11099 comm="restorecond" path="/etc/selinux/restorecond.conf" dev="sda1" ino=2232 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.13' (ECDSA) to the list of known hosts. syzkaller login: [ 112.104432][ T27] kauditd_printk_skb: 3 callbacks suppressed [ 112.104448][ T27] audit: type=1400 audit(1579487651.459:42): avc: denied { map } for pid=11194 comm="syz-executor798" path="/root/syz-executor798194014" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 112.110132][T11194] ================================================================== [ 112.110521][ T27] audit: type=1400 audit(1579487651.459:43): avc: denied { create } for pid=11194 comm="syz-executor798" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 112.137572][T11194] BUG: KASAN: slab-out-of-bounds in bitmap_ipmac_list+0x635/0x1080 [ 112.137585][T11194] Read of size 8 at addr ffff88809e669b80 by task syz-executor798/11194 [ 112.137588][T11194] [ 112.137604][T11194] CPU: 0 PID: 11194 Comm: syz-executor798 Not tainted 5.5.0-rc6-syzkaller #0 executing program [ 112.137611][T11194] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 112.137616][T11194] Call Trace: [ 112.137639][T11194] dump_stack+0x197/0x210 [ 112.137652][T11194] ? bitmap_ipmac_list+0x635/0x1080 [ 112.137672][T11194] print_address_description.constprop.0.cold+0xd4/0x30b [ 112.137683][T11194] ? bitmap_ipmac_list+0x635/0x1080 [ 112.137695][T11194] ? bitmap_ipmac_list+0x635/0x1080 [ 112.137708][T11194] __kasan_report.cold+0x1b/0x41 [ 112.137721][T11194] ? bitmap_ipmac_list+0x635/0x1080 [ 112.137736][T11194] kasan_report+0x12/0x20 [ 112.137750][T11194] check_memory_region+0x134/0x1a0 [ 112.137769][T11194] __kasan_check_read+0x11/0x20 [ 112.145947][ T27] audit: type=1400 audit(1579487651.459:44): avc: denied { write } for pid=11194 comm="syz-executor798" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 112.170854][T11194] bitmap_ipmac_list+0x635/0x1080 [ 112.170880][T11194] ? bitmap_ipmac_head+0x8a0/0x8a0 [ 112.170897][T11194] ? nla_put+0x110/0x150 [ 112.170912][T11194] ip_set_dump_start+0x96c/0x1ca0 [ 112.170932][T11194] ? ip_set_rename+0x720/0x720 [ 112.170952][T11194] ? __kmalloc_reserve.isra.0+0xf0/0xf0 [ 112.170969][T11194] ? perf_trace_lock_acquire+0x4a0/0x530 [ 112.170985][T11194] ? __kasan_check_write+0x14/0x20 [ 112.171006][T11194] netlink_dump+0x558/0xfb0 [ 112.333183][T11194] ? __netlink_sendskb+0xc0/0xc0 [ 112.338185][T11194] __netlink_dump_start+0x66a/0x930 [ 112.343411][T11194] ip_set_dump+0x15a/0x1d0 [ 112.347830][T11194] ? call_ad+0x5a0/0x5a0 [ 112.352126][T11194] ? ip_set_rename+0x720/0x720 [ 112.356992][T11194] ? __ip_set_put_netlink.isra.0+0x90/0x90 [ 112.362909][T11194] ? call_ad+0x5a0/0x5a0 [ 112.368811][T11194] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 112.373801][T11194] ? nfnetlink_bind+0x2c0/0x2c0 [ 112.378702][T11194] ? avc_has_extended_perms+0x10f0/0x10f0 [ 112.384428][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 112.392679][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 112.398928][T11194] ? cred_has_capability+0x199/0x330 [ 112.404221][T11194] ? selinux_sb_eat_lsm_opts+0x700/0x700 [ 112.409900][T11194] ? selinux_sb_eat_lsm_opts+0x700/0x700 [ 112.416381][T11194] ? __check_heap_object+0x53/0xb3 [ 112.421482][T11194] ? __lock_acquire+0x8a0/0x4a00 [ 112.426547][T11194] netlink_rcv_skb+0x177/0x450 [ 112.431800][T11194] ? nfnetlink_bind+0x2c0/0x2c0 [ 112.436894][T11194] ? netlink_ack+0xb50/0xb50 [ 112.441578][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 112.447965][T11194] ? ns_capable_common+0x93/0x100 [ 112.452992][T11194] ? ns_capable+0x20/0x30 [ 112.457400][T11194] ? __netlink_ns_capable+0x104/0x140 [ 112.463085][T11194] nfnetlink_rcv+0x1ba/0x460 [ 112.467927][T11194] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 112.473403][T11194] ? netlink_deliver_tap+0x24a/0xbe0 [ 112.478694][T11194] ? __kasan_check_write+0x14/0x20 [ 112.483857][T11194] netlink_unicast+0x58c/0x7d0 [ 112.488624][T11194] ? netlink_attachskb+0x870/0x870 [ 112.493780][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 112.500283][T11194] netlink_sendmsg+0x91c/0xea0 [ 112.505049][T11194] ? netlink_unicast+0x7d0/0x7d0 [ 112.509990][T11194] ? tomoyo_socket_sendmsg+0x26/0x30 [ 112.515291][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 112.521650][T11194] ? security_socket_sendmsg+0x8d/0xc0 [ 112.527166][T11194] ? netlink_unicast+0x7d0/0x7d0 [ 112.532098][T11194] sock_sendmsg+0xd7/0x130 [ 112.536797][T11194] ____sys_sendmsg+0x753/0x880 [ 112.541560][T11194] ? kernel_sendmsg+0x50/0x50 [ 112.546235][T11194] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 112.552398][T11194] ___sys_sendmsg+0x100/0x170 [ 112.557085][T11194] ? sendmsg_copy_msghdr+0x70/0x70 [ 112.562371][T11194] ? __kasan_check_read+0x11/0x20 [ 112.567525][T11194] ? __lock_acquire+0x8a0/0x4a00 [ 112.572470][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 112.578731][T11194] ? __this_cpu_preempt_check+0x35/0x190 [ 112.584367][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 112.590615][T11194] ? percpu_counter_add_batch+0x13c/0x190 [ 112.596710][T11194] ? __fd_install+0x1bc/0x640 [ 112.603171][T11194] ? find_held_lock+0x35/0x130 [ 112.607958][T11194] ? __fd_install+0x1bc/0x640 [ 112.612648][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 112.618945][T11194] ? __fget_light+0x1a9/0x230 [ 112.623669][T11194] ? __fdget+0x1b/0x20 [ 112.627741][T11194] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 112.634036][T11194] __sys_sendmsg+0x105/0x1d0 [ 112.638662][T11194] ? __sys_sendmsg_sock+0xc0/0xc0 [ 112.643702][T11194] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 112.649198][T11194] ? do_syscall_64+0x26/0x790 [ 112.653879][T11194] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 112.659984][T11194] ? do_syscall_64+0x26/0x790 [ 112.664664][T11194] __x64_sys_sendmsg+0x78/0xb0 [ 112.669532][T11194] do_syscall_64+0xfa/0x790 [ 112.674405][T11194] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 112.680286][T11194] RIP: 0033:0x4402c9 [ 112.684270][T11194] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 112.704194][T11194] RSP: 002b:00007fff2edbf798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 112.712748][T11194] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402c9 [ 112.720832][T11194] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000004 [ 112.728903][T11194] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 112.736916][T11194] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401b50 [ 112.744941][T11194] R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000 [ 112.752920][T11194] [ 112.755247][T11194] Allocated by task 11194: [ 112.759687][T11194] save_stack+0x23/0x90 [ 112.763852][T11194] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 112.769474][T11194] kasan_kmalloc+0x9/0x10 [ 112.773966][T11194] __kmalloc+0x163/0x770 [ 112.778308][T11194] ip_set_alloc+0x38/0x5e [ 112.782980][T11194] bitmap_ipmac_create+0x4e8/0xa00 [ 112.788076][T11194] ip_set_create+0x6f1/0x1500 [ 112.792808][T11194] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 112.797747][T11194] netlink_rcv_skb+0x177/0x450 [ 112.802513][T11194] nfnetlink_rcv+0x1ba/0x460 [ 112.807094][T11194] netlink_unicast+0x58c/0x7d0 [ 112.811856][T11194] netlink_sendmsg+0x91c/0xea0 [ 112.816609][T11194] sock_sendmsg+0xd7/0x130 [ 112.821141][T11194] ____sys_sendmsg+0x753/0x880 [ 112.825907][T11194] ___sys_sendmsg+0x100/0x170 [ 112.830796][T11194] __sys_sendmsg+0x105/0x1d0 [ 112.835746][T11194] __x64_sys_sendmsg+0x78/0xb0 [ 112.840507][T11194] do_syscall_64+0xfa/0x790 [ 112.845129][T11194] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 112.851703][T11194] [ 112.854060][T11194] Freed by task 10967: [ 112.858178][T11194] save_stack+0x23/0x90 [ 112.862329][T11194] __kasan_slab_free+0x102/0x150 [ 112.867265][T11194] kasan_slab_free+0xe/0x10 [ 112.871755][T11194] kfree+0x10a/0x2c0 [ 112.875635][T11194] tomoyo_check_open_permission+0x19e/0x3e0 [ 112.881585][T11194] tomoyo_file_open+0xa9/0xd0 [ 112.886305][T11194] security_file_open+0x71/0x300 [ 112.891241][T11194] do_dentry_open+0x37a/0x1380 [ 112.895996][T11194] vfs_open+0xa0/0xd0 [ 112.899960][T11194] path_openat+0x118b/0x3180 [ 112.904552][T11194] do_filp_open+0x1a1/0x280 [ 112.909061][T11194] do_sys_open+0x3fe/0x5d0 [ 112.913523][T11194] __x64_sys_open+0x7e/0xc0 [ 112.918139][T11194] do_syscall_64+0xfa/0x790 [ 112.922648][T11194] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 112.928709][T11194] [ 112.931035][T11194] The buggy address belongs to the object at ffff88809e669b80 [ 112.931035][T11194] which belongs to the cache kmalloc-32 of size 32 [ 112.945056][T11194] The buggy address is located 0 bytes inside of [ 112.945056][T11194] 32-byte region [ffff88809e669b80, ffff88809e669ba0) [ 112.958066][T11194] The buggy address belongs to the page: [ 112.963705][T11194] page:ffffea0002799a40 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809e669fc1 [ 112.974187][T11194] raw: 00fffe0000000200 ffffea00028d5188 ffffea0002a41bc8 ffff8880aa4001c0 [ 112.982814][T11194] raw: ffff88809e669fc1 ffff88809e669000 0000000100000030 0000000000000000 [ 112.991385][T11194] page dumped because: kasan: bad access detected [ 112.997819][T11194] [ 113.000147][T11194] Memory state around the buggy address: [ 113.005832][T11194] ffff88809e669a80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 113.013885][T11194] ffff88809e669b00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 113.022103][T11194] >ffff88809e669b80: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 113.030177][T11194] ^ [ 113.034245][T11194] ffff88809e669c00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 113.042297][T11194] ffff88809e669c80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 113.050348][T11194] ================================================================== [ 113.058403][T11194] Disabling lock debugging due to kernel taint [ 113.065362][T11194] Kernel panic - not syncing: panic_on_warn set ... [ 113.071961][T11194] CPU: 1 PID: 11194 Comm: syz-executor798 Tainted: G B 5.5.0-rc6-syzkaller #0 [ 113.082090][T11194] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.092181][T11194] Call Trace: [ 113.095463][T11194] dump_stack+0x197/0x210 [ 113.099795][T11194] panic+0x2e3/0x75c [ 113.103721][T11194] ? add_taint.cold+0x16/0x16 [ 113.108407][T11194] ? bitmap_ipmac_list+0x635/0x1080 [ 113.113602][T11194] ? preempt_schedule+0x4b/0x60 [ 113.118451][T11194] ? ___preempt_schedule+0x16/0x18 [ 113.123590][T11194] ? trace_hardirqs_on+0x5e/0x240 [ 113.128621][T11194] ? bitmap_ipmac_list+0x635/0x1080 [ 113.133820][T11194] end_report+0x47/0x4f [ 113.138029][T11194] ? bitmap_ipmac_list+0x635/0x1080 [ 113.143252][T11194] __kasan_report.cold+0xe/0x41 [ 113.148102][T11194] ? bitmap_ipmac_list+0x635/0x1080 [ 113.153337][T11194] kasan_report+0x12/0x20 [ 113.157667][T11194] check_memory_region+0x134/0x1a0 [ 113.162834][T11194] __kasan_check_read+0x11/0x20 [ 113.167669][T11194] bitmap_ipmac_list+0x635/0x1080 [ 113.172691][T11194] ? bitmap_ipmac_head+0x8a0/0x8a0 [ 113.177833][T11194] ? nla_put+0x110/0x150 [ 113.182183][T11194] ip_set_dump_start+0x96c/0x1ca0 [ 113.187203][T11194] ? ip_set_rename+0x720/0x720 [ 113.191966][T11194] ? __kmalloc_reserve.isra.0+0xf0/0xf0 [ 113.197507][T11194] ? perf_trace_lock_acquire+0x4a0/0x530 [ 113.203127][T11194] ? __kasan_check_write+0x14/0x20 [ 113.208238][T11194] netlink_dump+0x558/0xfb0 [ 113.212723][T11194] ? __netlink_sendskb+0xc0/0xc0 [ 113.217645][T11194] __netlink_dump_start+0x66a/0x930 [ 113.222846][T11194] ip_set_dump+0x15a/0x1d0 [ 113.227362][T11194] ? call_ad+0x5a0/0x5a0 [ 113.231641][T11194] ? ip_set_rename+0x720/0x720 [ 113.236399][T11194] ? __ip_set_put_netlink.isra.0+0x90/0x90 [ 113.242229][T11194] ? call_ad+0x5a0/0x5a0 [ 113.246456][T11194] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 113.251378][T11194] ? nfnetlink_bind+0x2c0/0x2c0 [ 113.256225][T11194] ? avc_has_extended_perms+0x10f0/0x10f0 [ 113.261933][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 113.268197][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 113.274437][T11194] ? cred_has_capability+0x199/0x330 [ 113.279701][T11194] ? selinux_sb_eat_lsm_opts+0x700/0x700 [ 113.285313][T11194] ? selinux_sb_eat_lsm_opts+0x700/0x700 [ 113.290940][T11194] ? __check_heap_object+0x53/0xb3 [ 113.296050][T11194] ? __lock_acquire+0x8a0/0x4a00 [ 113.300976][T11194] netlink_rcv_skb+0x177/0x450 [ 113.305905][T11194] ? nfnetlink_bind+0x2c0/0x2c0 [ 113.310739][T11194] ? netlink_ack+0xb50/0xb50 [ 113.315318][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 113.321558][T11194] ? ns_capable_common+0x93/0x100 [ 113.326579][T11194] ? ns_capable+0x20/0x30 [ 113.330911][T11194] ? __netlink_ns_capable+0x104/0x140 [ 113.336291][T11194] nfnetlink_rcv+0x1ba/0x460 [ 113.340871][T11194] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 113.346324][T11194] ? netlink_deliver_tap+0x24a/0xbe0 [ 113.351601][T11194] ? __kasan_check_write+0x14/0x20 [ 113.356815][T11194] netlink_unicast+0x58c/0x7d0 [ 113.361581][T11194] ? netlink_attachskb+0x870/0x870 [ 113.366712][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 113.372951][T11194] netlink_sendmsg+0x91c/0xea0 [ 113.377769][T11194] ? netlink_unicast+0x7d0/0x7d0 [ 113.382711][T11194] ? tomoyo_socket_sendmsg+0x26/0x30 [ 113.389306][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 113.395553][T11194] ? security_socket_sendmsg+0x8d/0xc0 [ 113.401120][T11194] ? netlink_unicast+0x7d0/0x7d0 [ 113.406067][T11194] sock_sendmsg+0xd7/0x130 [ 113.410611][T11194] ____sys_sendmsg+0x753/0x880 [ 113.415385][T11194] ? kernel_sendmsg+0x50/0x50 [ 113.420132][T11194] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 113.426292][T11194] ___sys_sendmsg+0x100/0x170 [ 113.430977][T11194] ? sendmsg_copy_msghdr+0x70/0x70 [ 113.436095][T11194] ? __kasan_check_read+0x11/0x20 [ 113.441173][T11194] ? __lock_acquire+0x8a0/0x4a00 [ 113.446121][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 113.452359][T11194] ? __this_cpu_preempt_check+0x35/0x190 [ 113.458066][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 113.464320][T11194] ? percpu_counter_add_batch+0x13c/0x190 [ 113.470187][T11194] ? __fd_install+0x1bc/0x640 [ 113.474873][T11194] ? find_held_lock+0x35/0x130 [ 113.479647][T11194] ? __fd_install+0x1bc/0x640 [ 113.484333][T11194] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 113.490642][T11194] ? __fget_light+0x1a9/0x230 [ 113.495318][T11194] ? __fdget+0x1b/0x20 [ 113.499436][T11194] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 113.505680][T11194] __sys_sendmsg+0x105/0x1d0 [ 113.510251][T11194] ? __sys_sendmsg_sock+0xc0/0xc0 [ 113.515369][T11194] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 113.520833][T11194] ? do_syscall_64+0x26/0x790 [ 113.525515][T11194] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 113.531575][T11194] ? do_syscall_64+0x26/0x790 [ 113.536250][T11194] __x64_sys_sendmsg+0x78/0xb0 [ 113.541016][T11194] do_syscall_64+0xfa/0x790 [ 113.545508][T11194] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 113.551392][T11194] RIP: 0033:0x4402c9 [ 113.555305][T11194] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 113.575105][T11194] RSP: 002b:00007fff2edbf798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 113.583511][T11194] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402c9 [ 113.591478][T11194] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000004 [ 113.599498][T11194] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 113.607515][T11194] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401b50 [ 113.615683][T11194] R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000 [ 113.625326][T11194] Kernel Offset: disabled [ 113.629669][T11194] Rebooting in 86400 seconds..