[ 72.767319][ T27] audit: type=1400 audit(1576234010.341:37): avc: denied { watch } for pid=9570 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16180 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [ 72.798813][ T27] audit: type=1400 audit(1576234010.341:38): avc: denied { watch } for pid=9570 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 file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.039134][ T27] audit: type=1800 audit(1576234010.611:39): pid=9475 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 73.061358][ T27] audit: type=1800 audit(1576234010.611:40): pid=9475 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 75.824537][ T27] audit: type=1400 audit(1576234013.401:41): avc: denied { map } for pid=9653 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.211' (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 [ 550.768970][ T27] audit: type=1400 audit(1576234488.341:42): avc: denied { map } for pid=9665 comm="syz-executor808" path="/root/syz-executor808060360" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 561.774530][T11473] ================================================================== [ 561.774672][T11473] BUG: KASAN: use-after-free in n_tty_receive_buf_common+0x270f/0x2b70 [ 561.774684][T11473] Read of size 1 at addr ffff888099881f80 by task syz-executor808/11473 [ 561.774688][T11473] [ 561.774703][T11473] CPU: 1 PID: 11473 Comm: syz-executor808 Not tainted 5.5.0-rc1-syzkaller #0 [ 561.774711][T11473] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 561.774716][T11473] Call Trace: [ 561.774781][T11473] dump_stack+0x197/0x210 [ 561.774797][T11473] ? n_tty_receive_buf_common+0x270f/0x2b70 [ 561.774840][T11473] print_address_description.constprop.0.cold+0xd4/0x30b [ 561.774854][T11473] ? n_tty_receive_buf_common+0x270f/0x2b70 [ 561.774869][T11473] ? n_tty_receive_buf_common+0x270f/0x2b70 [ 561.774883][T11473] __kasan_report.cold+0x1b/0x41 [ 561.774901][T11473] ? n_tty_receive_buf_common+0x270f/0x2b70 [ 561.774917][T11473] kasan_report+0x12/0x20 [ 561.774933][T11473] __asan_report_load1_noabort+0x14/0x20 [ 561.774946][T11473] n_tty_receive_buf_common+0x270f/0x2b70 [ 561.774958][T11473] ? __kasan_check_read+0x11/0x20 [ 561.774990][T11473] n_tty_receive_buf2+0x34/0x40 [ 561.775007][T11473] tty_ldisc_receive_buf+0xad/0x1c0 [ 561.775038][T11473] ? add_wait_queue+0x112/0x170 [ 561.775052][T11473] ? n_tty_receive_buf_common+0x2b70/0x2b70 [ 561.775085][T11473] paste_selection+0x1ff/0x460 [ 561.775103][T11473] ? vcs_remove_sysfs+0x60/0x60 [ 561.775122][T11473] ? lock_downgrade+0x920/0x920 [ 561.775152][T11473] ? wake_up_q+0x140/0x140 [ 561.775195][T11473] tioclinux+0x133/0x480 [ 561.928903][T11473] vt_ioctl+0x1a41/0x26d0 [ 561.928926][T11473] ? complete_change_console+0x3a0/0x3a0 [ 561.928939][T11473] ? lock_downgrade+0x920/0x920 [ 561.929006][T11473] ? rwlock_bug.part.0+0x90/0x90 [ 561.929066][T11473] ? tomoyo_path_number_perm+0x214/0x520 [ 561.954325][T11473] ? find_held_lock+0x35/0x130 [ 561.954344][T11473] ? tomoyo_path_number_perm+0x214/0x520 [ 561.964767][T11473] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 561.964786][T11473] ? tty_jobctrl_ioctl+0x50/0xd40 [ 561.964806][T11473] ? complete_change_console+0x3a0/0x3a0 [ 561.981297][T11473] tty_ioctl+0xa37/0x14f0 [ 561.981313][T11473] ? tty_vhangup+0x30/0x30 [ 561.981325][T11473] ? tomoyo_path_number_perm+0x454/0x520 [ 561.981343][T11473] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 561.981356][T11473] ? tomoyo_path_number_perm+0x25e/0x520 [ 561.981372][T11473] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 561.981394][T11473] ? ___might_sleep+0x163/0x2c0 [ 561.981412][T11473] ? tty_vhangup+0x30/0x30 [ 561.981463][T11473] do_vfs_ioctl+0x977/0x14e0 [ 562.027077][T11473] ? compat_ioctl_preallocate+0x220/0x220 [ 562.027132][T11473] ? selinux_file_mprotect+0x620/0x620 [ 562.027151][T11473] ? __kasan_check_write+0x14/0x20 [ 562.027191][T11473] ? tomoyo_file_ioctl+0x23/0x30 [ 562.027210][T11473] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 562.054606][T11473] ? security_file_ioctl+0x8d/0xc0 [ 562.054626][T11473] ksys_ioctl+0xab/0xd0 [ 562.054644][T11473] __x64_sys_ioctl+0x73/0xb0 [ 562.054697][T11473] do_syscall_64+0xfa/0x790 [ 562.054748][T11473] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 562.054760][T11473] RIP: 0033:0x441329 [ 562.054775][T11473] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 562.054782][T11473] RSP: 002b:00007fff51699728 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 562.054795][T11473] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441329 [ 562.054803][T11473] RDX: 0000000020000140 RSI: 000000000000541c RDI: 0000000000000003 [ 562.054810][T11473] RBP: 00000000000891e6 R08: 000000000000000d R09: 00000000004002c8 [ 562.054817][T11473] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004020a0 [ 562.054824][T11473] R13: 0000000000402130 R14: 0000000000000000 R15: 0000000000000000 [ 562.054843][T11473] [ 562.054850][T11473] Allocated by task 11470: [ 562.054862][T11473] save_stack+0x23/0x90 [ 562.054873][T11473] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 562.054883][T11473] kasan_kmalloc+0x9/0x10 [ 562.054893][T11473] __kmalloc+0x163/0x770 [ 562.054905][T11473] set_selection_kernel+0x872/0x13b0 [ 562.054915][T11473] set_selection_user+0x95/0xd9 [ 562.054926][T11473] tioclinux+0x11c/0x480 [ 562.054938][T11473] vt_ioctl+0x1a41/0x26d0 [ 562.054950][T11473] tty_ioctl+0xa37/0x14f0 [ 562.054960][T11473] do_vfs_ioctl+0x977/0x14e0 [ 562.054971][T11473] ksys_ioctl+0xab/0xd0 [ 562.054981][T11473] __x64_sys_ioctl+0x73/0xb0 [ 562.054993][T11473] do_syscall_64+0xfa/0x790 [ 562.055004][T11473] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 562.055008][T11473] [ 562.055013][T11473] Freed by task 11471: [ 562.055023][T11473] save_stack+0x23/0x90 [ 562.055033][T11473] __kasan_slab_free+0x102/0x150 [ 562.055044][T11473] kasan_slab_free+0xe/0x10 [ 562.055053][T11473] kfree+0x10a/0x2c0 [ 562.055063][T11473] set_selection_kernel+0x88f/0x13b0 [ 562.055073][T11473] set_selection_user+0x95/0xd9 [ 562.055084][T11473] tioclinux+0x11c/0x480 [ 562.055095][T11473] vt_ioctl+0x1a41/0x26d0 [ 562.055106][T11473] tty_ioctl+0xa37/0x14f0 [ 562.055117][T11473] do_vfs_ioctl+0x977/0x14e0 [ 562.055127][T11473] ksys_ioctl+0xab/0xd0 [ 562.055138][T11473] __x64_sys_ioctl+0x73/0xb0 [ 562.055151][T11473] do_syscall_64+0xfa/0x790 [ 562.055163][T11473] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 562.055167][T11473] [ 562.055177][T11473] The buggy address belongs to the object at ffff888099881f80 [ 562.055177][T11473] which belongs to the cache kmalloc-32 of size 32 [ 562.055189][T11473] The buggy address is located 0 bytes inside of [ 562.055189][T11473] 32-byte region [ffff888099881f80, ffff888099881fa0) [ 562.055194][T11473] The buggy address belongs to the page: [ 562.055209][T11473] page:ffffea0002662040 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff888099881fc1 [ 562.055226][T11473] raw: 00fffe0000000200 ffffea000250d948 ffffea00026b34c8 ffff8880aa4001c0 [ 562.055241][T11473] raw: ffff888099881fc1 ffff888099881000 000000010000003f 0000000000000000 [ 562.055247][T11473] page dumped because: kasan: bad access detected [ 562.055250][T11473] [ 562.055254][T11473] Memory state around the buggy address: [ 562.055265][T11473] ffff888099881e80: 00 00 01 fc fc fc fc fc fb fb fb fb fc fc fc fc [ 562.055274][T11473] ffff888099881f00: 06 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 562.055284][T11473] >ffff888099881f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 562.055289][T11473] ^ [ 562.055298][T11473] ffff888099882000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 562.055308][T11473] ffff888099882080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 562.055313][T11473] ================================================================== [ 562.055317][T11473] Disabling lock debugging due to kernel taint [ 562.057463][T11473] Kernel panic - not syncing: panic_on_warn set ... [ 562.057479][T11473] CPU: 1 PID: 11473 Comm: syz-executor808 Tainted: G B 5.5.0-rc1-syzkaller #0 [ 562.057486][T11473] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 562.057489][T11473] Call Trace: [ 562.057505][T11473] dump_stack+0x197/0x210 [ 562.057571][T11473] panic+0x2e3/0x75c [ 562.057584][T11473] ? add_taint.cold+0x16/0x16 [ 562.057599][T11473] ? n_tty_receive_buf_common+0x270f/0x2b70 [ 562.057613][T11473] ? preempt_schedule+0x4b/0x60 [ 562.057626][T11473] ? ___preempt_schedule+0x16/0x18 [ 562.057672][T11473] ? trace_hardirqs_on+0x5e/0x240 [ 562.057686][T11473] ? n_tty_receive_buf_common+0x270f/0x2b70 [ 562.057698][T11473] end_report+0x47/0x4f [ 562.057710][T11473] ? n_tty_receive_buf_common+0x270f/0x2b70 [ 562.057721][T11473] __kasan_report.cold+0xe/0x41 [ 562.057735][T11473] ? n_tty_receive_buf_common+0x270f/0x2b70 [ 562.057753][T11473] kasan_report+0x12/0x20 [ 562.057765][T11473] __asan_report_load1_noabort+0x14/0x20 [ 562.057778][T11473] n_tty_receive_buf_common+0x270f/0x2b70 [ 562.057788][T11473] ? __kasan_check_read+0x11/0x20 [ 562.057810][T11473] n_tty_receive_buf2+0x34/0x40 [ 562.057823][T11473] tty_ldisc_receive_buf+0xad/0x1c0 [ 562.057834][T11473] ? add_wait_queue+0x112/0x170 [ 562.057847][T11473] ? n_tty_receive_buf_common+0x2b70/0x2b70 [ 562.057859][T11473] paste_selection+0x1ff/0x460 [ 562.057872][T11473] ? vcs_remove_sysfs+0x60/0x60 [ 562.057884][T11473] ? lock_downgrade+0x920/0x920 [ 562.057897][T11473] ? wake_up_q+0x140/0x140 [ 562.057914][T11473] tioclinux+0x133/0x480 [ 562.057928][T11473] vt_ioctl+0x1a41/0x26d0 [ 562.057942][T11473] ? complete_change_console+0x3a0/0x3a0 [ 562.057953][T11473] ? lock_downgrade+0x920/0x920 [ 562.057965][T11473] ? rwlock_bug.part.0+0x90/0x90 [ 562.057979][T11473] ? tomoyo_path_number_perm+0x214/0x520 [ 562.057989][T11473] ? find_held_lock+0x35/0x130 [ 562.058001][T11473] ? tomoyo_path_number_perm+0x214/0x520 [ 562.058014][T11473] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 562.058025][T11473] ? tty_jobctrl_ioctl+0x50/0xd40 [ 562.058038][T11473] ? complete_change_console+0x3a0/0x3a0 [ 562.058050][T11473] tty_ioctl+0xa37/0x14f0 [ 562.058063][T11473] ? tty_vhangup+0x30/0x30 [ 562.058074][T11473] ? tomoyo_path_number_perm+0x454/0x520 [ 562.058088][T11473] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 562.058099][T11473] ? tomoyo_path_number_perm+0x25e/0x520 [ 562.058112][T11473] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 562.058127][T11473] ? ___might_sleep+0x163/0x2c0 [ 562.058141][T11473] ? tty_vhangup+0x30/0x30 [ 562.058153][T11473] do_vfs_ioctl+0x977/0x14e0 [ 562.058167][T11473] ? compat_ioctl_preallocate+0x220/0x220 [ 562.058178][T11473] ? selinux_file_mprotect+0x620/0x620 [ 562.058191][T11473] ? __kasan_check_write+0x14/0x20 [ 562.058208][T11473] ? tomoyo_file_ioctl+0x23/0x30 [ 562.058220][T11473] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 562.058231][T11473] ? security_file_ioctl+0x8d/0xc0 [ 562.058243][T11473] ksys_ioctl+0xab/0xd0 [ 562.058256][T11473] __x64_sys_ioctl+0x73/0xb0 [ 562.058269][T11473] do_syscall_64+0xfa/0x790 [ 562.058282][T11473] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 562.058291][T11473] RIP: 0033:0x441329 [ 562.058303][T11473] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 562.058309][T11473] RSP: 002b:00007fff51699728 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 562.058320][T11473] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441329 [ 562.058327][T11473] RDX: 0000000020000140 RSI: 000000000000541c RDI: 0000000000000003 [ 562.058334][T11473] RBP: 00000000000891e6 R08: 000000000000000d R09: 00000000004002c8 [ 562.058340][T11473] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004020a0 [ 562.058347][T11473] R13: 0000000000402130 R14: 0000000000000000 R15: 0000000000000000 [ 562.059614][T11473] Kernel Offset: disabled [ 562.811414][T11473] Rebooting in 86400 seconds..