[ 82.638006][ T26] audit: type=1800 audit(1576228849.368:40): pid=10020 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: [ 84.810654][ T26] audit: type=1400 audit(1576228851.558:41): avc: denied { map } for pid=10196 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 '10.128.1.47' (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 [ 520.054564][ T26] audit: type=1400 audit(1576229286.808:42): avc: denied { map } for pid=10208 comm="syz-executor247" path="/root/syz-executor247383955" 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 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 710.390646][ T1096] INFO: task syz-executor247:14432 blocked for more than 143 seconds. [ 710.390668][ T1096] Not tainted 5.5.0-rc1-syzkaller #0 [ 710.390673][ T1096] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 710.390681][ T1096] syz-executor247 D28160 14432 10213 0x00004004 [ 710.390708][ T1096] Call Trace: [ 710.390786][ T1096] __schedule+0x934/0x1f90 [ 710.390808][ T1096] ? __sched_text_start+0x8/0x8 [ 710.390828][ T1096] ? lock_downgrade+0x920/0x920 [ 710.390880][ T1096] ? rwlock_bug.part.0+0x90/0x90 [ 710.390900][ T1096] schedule+0xdc/0x2b0 [ 710.390919][ T1096] schedule_preempt_disabled+0x13/0x20 [ 710.390932][ T1096] __mutex_lock+0x7ab/0x13c0 [ 710.390993][ T1096] ? tty_buffer_lock_exclusive+0x30/0x40 [ 710.391010][ T1096] ? mutex_trylock+0x2f0/0x2f0 [ 710.391024][ T1096] ? console_unlock+0x7b3/0xf00 [ 710.391062][ T1096] mutex_lock_nested+0x16/0x20 [ 710.391073][ T1096] ? mutex_lock_nested+0x16/0x20 [ 710.391087][ T1096] tty_buffer_lock_exclusive+0x30/0x40 [ 710.391119][ T1096] paste_selection+0x11d/0x460 [ 710.391168][ T1096] ? __might_fault+0x12b/0x1e0 [ 710.391185][ T1096] ? vcs_remove_sysfs+0x60/0x60 [ 710.391197][ T1096] ? lock_downgrade+0x920/0x920 [ 710.391232][ T1096] ? wake_up_q+0x140/0x140 [ 710.391274][ T1096] tioclinux+0x133/0x480 [ 710.391291][ T1096] vt_ioctl+0x1a41/0x26d0 [ 710.391309][ T1096] ? complete_change_console+0x3a0/0x3a0 [ 710.391321][ T1096] ? lock_downgrade+0x920/0x920 [ 710.391335][ T1096] ? rwlock_bug.part.0+0x90/0x90 [ 710.391370][ T1096] ? tomoyo_path_number_perm+0x214/0x520 [ 710.391383][ T1096] ? find_held_lock+0x35/0x130 [ 710.391397][ T1096] ? tomoyo_path_number_perm+0x214/0x520 [ 710.391431][ T1096] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 710.391446][ T1096] ? tty_jobctrl_ioctl+0x50/0xd40 [ 710.391461][ T1096] ? complete_change_console+0x3a0/0x3a0 [ 710.391476][ T1096] tty_ioctl+0xa37/0x14f0 [ 710.391492][ T1096] ? tty_vhangup+0x30/0x30 [ 710.391505][ T1096] ? tomoyo_path_number_perm+0x454/0x520 [ 710.391522][ T1096] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 710.391535][ T1096] ? tomoyo_path_number_perm+0x25e/0x520 [ 710.391551][ T1096] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 710.391574][ T1096] ? ___might_sleep+0x163/0x2c0 [ 710.391599][ T1096] ? tty_vhangup+0x30/0x30 [ 710.391631][ T1096] do_vfs_ioctl+0x977/0x14e0 [ 710.391649][ T1096] ? compat_ioctl_preallocate+0x220/0x220 [ 710.391681][ T1096] ? selinux_file_mprotect+0x620/0x620 [ 710.391713][ T1096] ? kmem_cache_free+0x26b/0x320 [ 710.391746][ T1096] ? putname+0xf4/0x130 [ 710.391778][ T1096] ? do_sys_open+0x31d/0x5d0 [ 710.391812][ T1096] ? tomoyo_file_ioctl+0x23/0x30 [ 710.391826][ T1096] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 710.391877][ T1096] ? security_file_ioctl+0x8d/0xc0 [ 710.391893][ T1096] ksys_ioctl+0xab/0xd0 [ 710.391909][ T1096] __x64_sys_ioctl+0x73/0xb0 [ 710.391949][ T1096] do_syscall_64+0xfa/0x790 [ 710.391986][ T1096] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 710.391998][ T1096] RIP: 0033:0x441339 [ 710.392043][ T1096] 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 [ 710.392051][ T1096] RSP: 002b:00007ffd979fe928 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 710.392064][ T1096] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441339 [ 710.392072][ T1096] RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000004 [ 710.392080][ T1096] RBP: 0000000000086854 R08: 000000000000000d R09: 00000000004002c8 [ 710.392088][ T1096] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004020b0 [ 710.392096][ T1096] R13: 0000000000402140 R14: 0000000000000000 R15: 0000000000000000 [ 710.392122][ T1096] INFO: task syz-executor247:14433 blocked for more than 143 seconds. [ 710.392130][ T1096] Not tainted 5.5.0-rc1-syzkaller #0 [ 710.392135][ T1096] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 710.392141][ T1096] syz-executor247 D28160 14433 10209 0x00004004 [ 710.392163][ T1096] Call Trace: [ 710.392182][ T1096] __schedule+0x934/0x1f90 [ 710.392203][ T1096] ? __sched_text_start+0x8/0x8 [ 710.392214][ T1096] ? lock_downgrade+0x920/0x920 [ 710.392228][ T1096] ? rwlock_bug.part.0+0x90/0x90 [ 710.392248][ T1096] schedule+0xdc/0x2b0 [ 710.392265][ T1096] schedule_preempt_disabled+0x13/0x20 [ 710.392277][ T1096] __mutex_lock+0x7ab/0x13c0 [ 710.392294][ T1096] ? tty_buffer_lock_exclusive+0x30/0x40 [ 710.392311][ T1096] ? mutex_trylock+0x2f0/0x2f0 [ 710.392324][ T1096] ? console_unlock+0x7b3/0xf00 [ 710.392354][ T1096] mutex_lock_nested+0x16/0x20 [ 710.392365][ T1096] ? mutex_lock_nested+0x16/0x20 [ 710.392380][ T1096] tty_buffer_lock_exclusive+0x30/0x40 [ 710.392392][ T1096] paste_selection+0x11d/0x460 [ 710.392405][ T1096] ? __might_fault+0x12b/0x1e0 [ 710.392421][ T1096] ? vcs_remove_sysfs+0x60/0x60 [ 710.392462][ T1096] ? lock_downgrade+0x920/0x920 [ 710.392478][ T1096] ? wake_up_q+0x140/0x140 [ 710.392503][ T1096] tioclinux+0x133/0x480 [ 710.392519][ T1096] vt_ioctl+0x1a41/0x26d0 [ 710.392536][ T1096] ? complete_change_console+0x3a0/0x3a0 [ 710.392548][ T1096] ? lock_downgrade+0x920/0x920 [ 710.392562][ T1096] ? rwlock_bug.part.0+0x90/0x90 [ 710.392576][ T1096] ? tomoyo_path_number_perm+0x214/0x520 [ 710.392589][ T1096] ? find_held_lock+0x35/0x130 [ 710.392604][ T1096] ? tomoyo_path_number_perm+0x214/0x520 [ 710.392617][ T1096] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 710.392632][ T1096] ? tty_jobctrl_ioctl+0x50/0xd40 [ 710.392646][ T1096] ? complete_change_console+0x3a0/0x3a0 [ 710.392661][ T1096] tty_ioctl+0xa37/0x14f0 [ 710.392676][ T1096] ? tty_vhangup+0x30/0x30 [ 710.392689][ T1096] ? tomoyo_path_number_perm+0x454/0x520 [ 710.392707][ T1096] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 710.392721][ T1096] ? tomoyo_path_number_perm+0x25e/0x520 [ 710.392737][ T1096] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 710.392759][ T1096] ? ___might_sleep+0x163/0x2c0 [ 710.392778][ T1096] ? tty_vhangup+0x30/0x30 [ 710.392793][ T1096] do_vfs_ioctl+0x977/0x14e0 [ 710.392810][ T1096] ? compat_ioctl_preallocate+0x220/0x220 [ 710.392823][ T1096] ? selinux_file_mprotect+0x620/0x620 [ 710.392837][ T1096] ? kmem_cache_free+0x26b/0x320 [ 710.392853][ T1096] ? putname+0xf4/0x130 [ 710.392868][ T1096] ? do_sys_open+0x31d/0x5d0 [ 710.392885][ T1096] ? tomoyo_file_ioctl+0x23/0x30 [ 710.392899][ T1096] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 710.392911][ T1096] ? security_file_ioctl+0x8d/0xc0 [ 710.392927][ T1096] ksys_ioctl+0xab/0xd0 [ 710.392943][ T1096] __x64_sys_ioctl+0x73/0xb0 [ 710.392958][ T1096] do_syscall_64+0xfa/0x790 [ 710.392975][ T1096] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 710.392985][ T1096] RIP: 0033:0x441339 [ 710.392997][ T1096] 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 [ 710.393004][ T1096] RSP: 002b:00007ffd979fe928 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 710.393017][ T1096] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441339 [ 710.393025][ T1096] RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000004 [ 710.393038][ T1096] RBP: 0000000000086861 R08: 000000000000000d R09: 00000000004002c8 [ 710.393045][ T1096] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004020b0 [ 710.393053][ T1096] R13: 0000000000402140 R14: 0000000000000000 R15: 0000000000000000 [ 710.393078][ T1096] INFO: task syz-executor247:14434 blocked for more than 143 seconds. [ 710.393086][ T1096] Not tainted 5.5.0-rc1-syzkaller #0 [ 710.393091][ T1096] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 710.393096][ T1096] syz-executor247 D27824 14434 10210 0x00004004 [ 710.393116][ T1096] Call Trace: [ 710.393133][ T1096] __schedule+0x934/0x1f90 [ 710.393153][ T1096] ? __sched_text_start+0x8/0x8 [ 710.393164][ T1096] ? lock_downgrade+0x920/0x920 [ 710.393178][ T1096] ? rwlock_bug.part.0+0x90/0x90 [ 710.393197][ T1096] schedule+0xdc/0x2b0 [ 710.393215][ T1096] schedule_preempt_disabled+0x13/0x20 [ 710.393227][ T1096] __mutex_lock+0x7ab/0x13c0 [ 710.393244][ T1096] ? tty_buffer_lock_exclusive+0x30/0x40 [ 710.393260][ T1096] ? mutex_trylock+0x2f0/0x2f0 [ 710.393274][ T1096] ? console_unlock+0x7b3/0xf00 [ 710.393303][ T1096] mutex_lock_nested+0x16/0x20 [ 710.393314][ T1096] ? mutex_lock_nested+0x16/0x20 [ 710.393329][ T1096] tty_buffer_lock_exclusive+0x30/0x40 [ 710.393341][ T1096] paste_selection+0x11d/0x460 [ 710.393354][ T1096] ? __might_fault+0x12b/0x1e0 [ 710.393370][ T1096] ? vcs_remove_sysfs+0x60/0x60 [ 710.393383][ T1096] ? lock_downgrade+0x920/0x920 [ 710.393399][ T1096] ? wake_up_q+0x140/0x140 [ 710.393423][ T1096] tioclinux+0x133/0x480 [ 710.393441][ T1096] vt_ioctl+0x1a41/0x26d0 [ 710.393458][ T1096] ? complete_change_console+0x3a0/0x3a0 [ 710.393470][ T1096] ? lock_downgrade+0x920/0x920 [ 710.393484][ T1096] ? rwlock_bug.part.0+0x90/0x90 [ 710.393498][ T1096] ? tomoyo_path_number_perm+0x214/0x520 [ 710.393511][ T1096] ? find_held_lock+0x35/0x130 [ 710.393525][ T1096] ? tomoyo_path_number_perm+0x214/0x520 [ 710.393539][ T1096] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 710.393553][ T1096] ? tty_jobctrl_ioctl+0x50/0xd40 [ 710.393567][ T1096] ? complete_change_console+0x3a0/0x3a0 [ 710.393582][ T1096] tty_ioctl+0xa37/0x14f0 [ 710.393597][ T1096] ? tty_vhangup+0x30/0x30 [ 710.393609][ T1096] ? tomoyo_path_number_perm+0x454/0x520 [ 710.393626][ T1096] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 710.393639][ T1096] ? tomoyo_path_number_perm+0x25e/0x520 [ 710.393656][ T1096] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 710.393678][ T1096] ? ___might_sleep+0x163/0x2c0 [ 710.393697][ T1096] ? tty_vhangup+0x30/0x30 [ 710.393711][ T1096] do_vfs_ioctl+0x977/0x14e0 [ 710.393729][ T1096] ? compat_ioctl_preallocate+0x220/0x220 [ 710.393742][ T1096] ? selinux_file_mprotect+0x620/0x620 [ 710.393756][ T1096] ? kmem_cache_free+0x26b/0x320 [ 710.393772][ T1096] ? putname+0xf4/0x130 [ 710.393786][ T1096] ? do_sys_open+0x31d/0x5d0 [ 710.393803][ T1096] ? tomoyo_file_ioctl+0x23/0x30 [ 710.393817][ T1096] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 710.393829][ T1096] ? security_file_ioctl+0x8d/0xc0 [ 710.393845][ T1096] ksys_ioctl+0xab/0xd0 [ 710.393860][ T1096] __x64_sys_ioctl+0x73/0xb0 [ 710.393876][ T1096] do_syscall_64+0xfa/0x790 [ 710.393893][ T1096] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 710.393902][ T1096] RIP: 0033:0x441339 [ 710.393914][ T1096] 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 [ 710.393921][ T1096] RSP: 002b:00007ffd979fe928 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 710.393933][ T1096] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441339 [ 710.393941][ T1096] RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000004 [ 710.393949][ T1096] RBP: 0000000000086860 R08: 000000000000000d R09: 00000000004002c8 [ 710.393957][ T1096] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004020b0 [ 710.393965][ T1096] R13: 0000000000402140 R14: 0000000000000000 R15: 0000000000000000 [ 710.393991][ T1096] INFO: task syz-executor247:14435 blocked for more than 143 seconds. [ 710.393998][ T1096] Not tainted 5.5.0-rc1-syzkaller #0 [ 710.394003][ T1096] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 710.394008][ T1096] syz-executor247 D28160 14435 10211 0x00004004 [ 710.394028][ T1096] Call Trace: [ 710.394050][ T1096] __schedule+0x934/0x1f90 [ 710.394069][ T1096] ? __sched_text_start+0x8/0x8 [ 710.394080][ T1096] ? lock_downgrade+0x920/0x920 [ 710.394094][ T1096] ? rwlock_bug.part.0+0x90/0x90 [ 710.394114][ T1096] schedule+0xdc/0x2b0 [ 710.394130][ T1096] schedule_preempt_disabled+0x13/0x20 [ 710.394142][ T1096] __mutex_lock+0x7ab/0x13c0 [ 710.394159][ T1096] ? tty_buffer_lock_exclusive+0x30/0x40 [ 710.394175][ T1096] ? mutex_trylock+0x2f0/0x2f0 [ 710.394188][ T1096] ? console_unlock+0x7b3/0xf00 [ 710.394218][ T1096] mutex_lock_nested+0x16/0x20 [ 710.394229][ T1096] ? mutex_lock_nested+0x16/0x20 [ 710.394252][ T1096] tty_buffer_lock_exclusive+0x30/0x40 [ 710.394264][ T1096] paste_selection+0x11d/0x460 [ 710.394277][ T1096] ? __might_fault+0x12b/0x1e0 [ 710.394294][ T1096] ? vcs_remove_sysfs+0x60/0x60 [ 710.394306][ T1096] ? lock_downgrade+0x920/0x920 [ 710.394322][ T1096] ? wake_up_q+0x140/0x140 [ 710.394346][ T1096] tioclinux+0x133/0x480 [ 710.394362][ T1096] vt_ioctl+0x1a41/0x26d0 [ 710.394379][ T1096] ? complete_change_console+0x3a0/0x3a0 [ 710.394392][ T1096] ? lock_downgrade+0x920/0x920 [ 710.394405][ T1096] ? rwlock_bug.part.0+0x90/0x90 [ 710.394419][ T1096] ? tomoyo_path_number_perm+0x214/0x520 [ 710.394432][ T1096] ? find_held_lock+0x35/0x130 [ 710.394446][ T1096] ? tomoyo_path_number_perm+0x214/0x520 [ 710.394460][ T1096] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 710.394474][ T1096] ? tty_jobctrl_ioctl+0x50/0xd40 [ 710.394489][ T1096] ? complete_change_console+0x3a0/0x3a0 [ 710.394505][ T1096] tty_ioctl+0xa37/0x14f0 [ 710.394521][ T1096] ? tty_vhangup+0x30/0x30 [ 710.394533][ T1096] ? tomoyo_path_number_perm+0x454/0x520 [ 710.394550][ T1096] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 710.394563][ T1096] ? tomoyo_path_number_perm+0x25e/0x520 [ 710.394579][ T1096] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 710.394601][ T1096] ? ___might_sleep+0x163/0x2c0 [ 710.394621][ T1096] ? tty_vhangup+0x30/0x30 [ 710.394635][ T1096] do_vfs_ioctl+0x977/0x14e0 [ 710.394653][ T1096] ? compat_ioctl_preallocate+0x220/0x220 [ 710.394665][ T1096] ? selinux_file_mprotect+0x620/0x620 [ 710.394709][ T1096] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 710.394728][ T1096] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 710.394746][ T1096] ? tomoyo_file_ioctl+0x23/0x30 [ 710.394760][ T1096] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 710.394772][ T1096] ? security_file_ioctl+0x8d/0xc0 [ 710.394787][ T1096] ksys_ioctl+0xab/0xd0 [ 710.394803][ T1096] __x64_sys_ioctl+0x73/0xb0 [ 710.394818][ T1096] do_syscall_64+0xfa/0x790 [ 710.394835][ T1096] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 710.394844][ T1096] RIP: 0033:0x441339 [ 710.394856][ T1096] 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 [ 710.394863][ T1096] RSP: 002b:00007ffd979fe928 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 710.394876][ T1096] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441339 [ 710.394883][ T1096] RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000004 [ 710.394891][ T1096] RBP: 0000000000086866 R08: 000000000000000d R09: 00000000004002c8 [ 710.394899][ T1096] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004020b0 [ 710.394907][ T1096] R13: 0000000000402140 R14: 0000000000000000 R15: 0000000000000000 [ 710.394932][ T1096] INFO: task syz-executor247:14437 blocked for more than 143 seconds. [ 710.394939][ T1096] Not tainted 5.5.0-rc1-syzkaller #0 [ 710.394945][ T1096] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 710.394950][ T1096] syz-executor247 D28160 14437 10214 0x00004004 [ 710.394972][ T1096] Call Trace: [ 710.394989][ T1096] __schedule+0x934/0x1f90 [ 710.395010][ T1096] ? __sched_text_start+0x8/0x8 [ 710.395021][ T1096] ? lock_downgrade+0x920/0x920 [ 710.395039][ T1096] ? rwlock_bug.part.0+0x90/0x90 [ 710.395060][ T1096] schedule+0xdc/0x2b0 [ 710.395077][ T1096] schedule_preempt_disabled+0x13/0x20 [ 710.395089][ T1096] __mutex_lock+0x7ab/0x13c0 [ 710.395107][ T1096] ? tty_buffer_lock_exclusive+0x30/0x40 [ 710.395123][ T1096] ? mutex_trylock+0x2f0/0x2f0 [ 710.395137][ T1096] ? console_unlock+0x7b3/0xf00 [ 710.395166][ T1096] mutex_lock_nested+0x16/0x20 [ 710.395177][ T1096] ? mutex_lock_nested+0x16/0x20 [ 710.395192][ T1096] tty_buffer_lock_exclusive+0x30/0x40 [ 710.395204][ T1096] paste_selection+0x11d/0x460 [ 710.395216][ T1096] ? __might_fault+0x12b/0x1e0 [ 710.395233][ T1096] ? vcs_remove_sysfs+0x60/0x60 [ 710.395246][ T1096] ? lock_downgrade+0x920/0x920 [ 710.395262][ T1096] ? wake_up_q+0x140/0x140 [ 710.395286][ T1096] tioclinux+0x133/0x480 [ 710.395302][ T1096] vt_ioctl+0x1a41/0x26d0 [ 710.395320][ T1096] ? complete_change_console+0x3a0/0x3a0 [ 710.395331][ T1096] ? lock_downgrade+0x920/0x920 [ 710.395345][ T1096] ? rwlock_bug.part.0+0x90/0x90 [ 710.395360][ T1096] ? tomoyo_path_number_perm+0x214/0x520 [ 710.395372][ T1096] ? find_held_lock+0x35/0x130 [ 710.395386][ T1096] ? tomoyo_path_number_perm+0x214/0x520 [ 710.395400][ T1096] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 710.395414][ T1096] ? tty_jobctrl_ioctl+0x50/0xd40 [ 710.395428][ T1096] ? complete_change_console+0x3a0/0x3a0 [ 710.395443][ T1096] tty_ioctl+0xa37/0x14f0 [ 710.395459][ T1096] ? tty_vhangup+0x30/0x30 [ 710.395471][ T1096] ? tomoyo_path_number_perm+0x454/0x520 [ 710.395489][ T1096] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 710.395501][ T1096] ? tomoyo_path_number_perm+0x25e/0x520 [ 710.395517][ T1096] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 710.395539][ T1096] ? ___might_sleep+0x163/0x2c0 [ 710.395558][ T1096] ? tty_vhangup+0x30/0x30 [ 710.395572][ T1096] do_vfs_ioctl+0x977/0x14e0 [ 710.395590][ T1096] ? compat_ioctl_preallocate+0x220/0x220 [ 710.395603][ T1096] ? selinux_file_mprotect+0x620/0x620 [ 710.395617][ T1096] ? kmem_cache_free+0x26b/0x320 [ 710.395632][ T1096] ? putname+0xf4/0x130 [ 710.395646][ T1096] ? do_sys_open+0x31d/0x5d0 [ 710.395664][ T1096] ? tomoyo_file_ioctl+0x23/0x30 [ 710.395678][ T1096] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 710.395690][ T1096] ? security_file_ioctl+0x8d/0xc0 [ 710.395705][ T1096] ksys_ioctl+0xab/0xd0 [ 710.395721][ T1096] __x64_sys_ioctl+0x73/0xb0 [ 710.395737][ T1096] do_syscall_64+0xfa/0x790 [ 710.395754][ T1096] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 710.395764][ T1096] RIP: 0033:0x441339 [ 710.395777][ T1096] 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 [ 710.395784][ T1096] RSP: 002b:00007ffd979fe928 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 710.395796][ T1096] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441339 [ 710.395803][ T1096] RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000004 [ 710.395811][ T1096] RBP: 0000000000086880 R08: 000000000000000d R09: 00000000004002c8 [ 710.395819][ T1096] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004020b0 [ 710.395827][ T1096] R13: 0000000000402140 R14: 0000000000000000 R15: 0000000000000000 [ 710.395847][ T1096] [ 710.395847][ T1096] Showing all locks held in the system: [ 710.395865][ T1096] 1 lock held by khungtaskd/1096: [ 710.395869][ T1096] #0: ffffffff899a56c0 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 710.395947][ T1096] 1 lock held by rsyslogd/10058: [ 710.395951][ T1096] #0: ffff8880a9506de0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 710.396003][ T1096] 5 locks held by getty/10180: [ 710.396012][ T1096] 2 locks held by getty/10181: [ 710.396017][ T1096] #0: ffff88809e226090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396045][ T1096] #1: ffffc900018ab2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 710.396074][ T1096] 2 locks held by getty/10182: [ 710.396078][ T1096] #0: ffff8880a3fec090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396101][ T1096] #1: ffffc900018cb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 710.396130][ T1096] 2 locks held by getty/10183: [ 710.396134][ T1096] #0: ffff8880a8490090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396156][ T1096] #1: ffffc9000189b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 710.396184][ T1096] 2 locks held by getty/10184: [ 710.396189][ T1096] #0: ffff8880a1e55090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396211][ T1096] #1: ffffc900018bb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 710.396239][ T1096] 2 locks held by getty/10185: [ 710.396244][ T1096] #0: ffff88809539d090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396266][ T1096] #1: ffffc900018eb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 710.396295][ T1096] 2 locks held by getty/10186: [ 710.396299][ T1096] #0: ffff88809f0a2090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396322][ T1096] #1: ffffc9000182b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 710.396354][ T1096] 2 locks held by syz-executor247/14432: [ 710.396358][ T1096] #0: ffff88809af4c090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396380][ T1096] #1: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x30/0x40 [ 710.396410][ T1096] 2 locks held by syz-executor247/14433: [ 710.396414][ T1096] #0: ffff88809af4c090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396437][ T1096] #1: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x30/0x40 [ 710.396466][ T1096] 2 locks held by syz-executor247/14434: [ 710.396470][ T1096] #0: ffff88809af4c090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396492][ T1096] #1: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x30/0x40 [ 710.396523][ T1096] 2 locks held by syz-executor247/14435: [ 710.396527][ T1096] #0: ffff88809af4c090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396550][ T1096] #1: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x30/0x40 [ 710.396579][ T1096] 2 locks held by syz-executor247/14436: [ 710.396587][ T1096] 2 locks held by syz-executor247/14437: [ 710.396591][ T1096] #0: ffff88809af4c090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 710.396620][ T1096] #1: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x30/0x40 [ 710.396645][ T1096] [ 710.396650][ T1096] ============================================= [ 710.396650][ T1096] [ 710.396658][ T1096] NMI backtrace for cpu 0 [ 710.396672][ T1096] CPU: 0 PID: 1096 Comm: khungtaskd Not tainted 5.5.0-rc1-syzkaller #0 [ 710.396679][ T1096] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 710.396683][ T1096] Call Trace: [ 710.396736][ T1096] dump_stack+0x197/0x210 [ 710.396753][ T1096] nmi_cpu_backtrace.cold+0x70/0xb2 [ 710.396784][ T1096] ? vprintk_func+0x86/0x189 [ 710.396819][ T1096] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 710.396835][ T1096] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 710.396852][ T1096] arch_trigger_cpumask_backtrace+0x14/0x20 [ 710.396864][ T1096] watchdog+0xb11/0x10c0 [ 710.396917][ T1096] kthread+0x361/0x430 [ 710.396931][ T1096] ? reset_hung_task_detector+0x30/0x30 [ 710.396942][ T1096] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 710.396957][ T1096] ret_from_fork+0x24/0x30 [ 710.396979][ T1096] Sending NMI from CPU 0 to CPUs 1: [ 710.397714][ C1] NMI backtrace for cpu 1 [ 710.397720][ C1] CPU: 1 PID: 10180 Comm: getty Not tainted 5.5.0-rc1-syzkaller #0 [ 710.397726][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 710.397730][ C1] RIP: 0010:vga16fb_imageblit+0x9c6/0x2200 [ 710.397740][ C1] Code: c7 c2 58 34 93 89 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 cd 15 00 00 ff 15 b8 4a da 05 ba cf 03 00 00 ec <48> c7 c2 58 34 93 89 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 [ 710.397743][ C1] RSP: 0018:ffffc90001d77358 EFLAGS: 00000246 [ 710.397750][ C1] RAX: dffffc00000000ff RBX: 0000000000000007 RCX: ffffffff83b8e738 [ 710.397755][ C1] RDX: 00000000000003cf RSI: ffffffff83b8e746 RDI: ffffc90001d77510 [ 710.397759][ C1] RBP: ffffc90001d773f0 R08: ffff8880a7f305c0 R09: 000000000000001d [ 710.397764][ C1] R10: ffffed10147085db R11: ffff8880a3842edf R12: ffffc90001d77504 [ 710.397768][ C1] R13: ffffc90001d77500 R14: ffff8880a3831dc0 R15: 0000000000000001 [ 710.397773][ C1] FS: 00007feae6f0f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 710.397776][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 710.397781][ C1] CR2: 00007feae6f14000 CR3: 00000000a22ab000 CR4: 00000000001406e0 [ 710.397785][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 710.397789][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 710.397792][ C1] Call Trace: [ 710.397795][ C1] ? __kasan_check_read+0x11/0x20 [ 710.397798][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 710.397801][ C1] bit_putcs+0x9a3/0xf10 [ 710.397804][ C1] ? bit_cursor+0x1a60/0x1a60 [ 710.397807][ C1] ? bit_cursor+0xaf6/0x1a60 [ 710.397810][ C1] ? write_comp_data+0x21/0x70 [ 710.397814][ C1] ? fb_get_color_depth.part.0+0xcf/0x200 [ 710.397817][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 710.397820][ C1] fbcon_putcs+0x33c/0x3e0 [ 710.397823][ C1] ? bit_cursor+0x1a60/0x1a60 [ 710.397826][ C1] fbcon_redraw.isra.0+0x291/0x490 [ 710.397829][ C1] fbcon_scroll+0x1dd6/0x35b0 [ 710.397832][ C1] con_scroll+0x3fd/0x650 [ 710.397835][ C1] lf+0x285/0x2e0 [ 710.397837][ C1] ? con_scroll+0x650/0x650 [ 710.397845][ C1] ? __atomic_notifier_call_chain+0xd6/0x1a0 [ 710.397849][ C1] ? find_held_lock+0x35/0x130 [ 710.397852][ C1] do_con_trol+0x5d5/0x61b0 [ 710.397855][ C1] ? reset_palette+0x190/0x190 [ 710.397858][ C1] ? __kasan_check_read+0x11/0x20 [ 710.397861][ C1] ? __atomic_notifier_call_chain+0xf8/0x1a0 [ 710.397864][ C1] do_con_write.part.0+0xfd9/0x1ef0 [ 710.397868][ C1] ? n_tty_write+0x4bd/0x1080 [ 710.397871][ C1] ? do_con_trol+0x61b0/0x61b0 [ 710.397874][ C1] ? mutex_trylock+0x2f0/0x2f0 [ 710.397877][ C1] ? __kasan_check_write+0x14/0x20 [ 710.397880][ C1] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 710.397883][ C1] ? console_unlock+0x81e/0xf00 [ 710.397886][ C1] con_write+0x46/0xd0 [ 710.397889][ C1] do_output_char+0x5f7/0x880 [ 710.397892][ C1] ? con_write_room+0x5d/0x70 [ 710.397899][ C1] n_tty_write+0x4d2/0x1080 [ 710.397903][ C1] ? n_tty_read+0x1bf0/0x1bf0 [ 710.397906][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 710.397910][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 710.397913][ C1] ? _copy_from_user+0x12c/0x1a0 [ 710.397916][ C1] tty_write+0x496/0x7f0 [ 710.397919][ C1] ? n_tty_read+0x1bf0/0x1bf0 [ 710.397922][ C1] __vfs_write+0x8a/0x110 [ 710.397925][ C1] ? put_tty_driver+0x20/0x20 [ 710.397928][ C1] vfs_write+0x268/0x5d0 [ 710.397930][ C1] ksys_write+0x14f/0x290 [ 710.397933][ C1] ? __ia32_sys_read+0xb0/0xb0 [ 710.397936][ C1] ? do_syscall_64+0x26/0x790 [ 710.397940][ C1] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 710.397943][ C1] ? do_syscall_64+0x26/0x790 [ 710.397946][ C1] __x64_sys_write+0x73/0xb0 [ 710.397949][ C1] do_syscall_64+0xfa/0x790 [ 710.397952][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 710.397955][ C1] RIP: 0033:0x7feae683a370 [ 710.397968][ C1] Code: 73 01 c3 48 8b 0d c8 4a 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d 85 a2 2b 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 0e 8a 01 00 48 89 04 24 [ 710.397972][ C1] RSP: 002b:00007ffca8e04428 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 710.397979][ C1] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007feae683a370 [ 710.397984][ C1] RDX: 0000000000000001 RSI: 00007feae6aef823 RDI: 0000000000000001 [ 710.397989][ C1] RBP: 00007feae6aef823 R08: 000000000000000a R09: 00007feae6f0f700 [ 710.397993][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00007feae6aef7a0 [ 710.397997][ C1] R13: 0000000000000001 R14: 000000000000006c R15: 00007ffca8e04724 [ 710.398009][ T1096] Kernel panic - not syncing: hung_task: blocked tasks [ 710.398020][ T1096] CPU: 0 PID: 1096 Comm: khungtaskd Not tainted 5.5.0-rc1-syzkaller #0 [ 710.398026][ T1096] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 710.398030][ T1096] Call Trace: [ 710.398047][ T1096] dump_stack+0x197/0x210 [ 710.398094][ T1096] panic+0x2e3/0x75c [ 710.398112][ T1096] ? add_taint.cold+0x16/0x16 [ 710.398128][ T1096] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 710.398144][ T1096] ? printk_safe_flush+0xf2/0x140 [ 710.398159][ T1096] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 710.398176][ T1096] ? nmi_trigger_cpumask_backtrace+0x224/0x28b [ 710.398193][ T1096] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 710.398209][ T1096] watchdog+0xb22/0x10c0 [ 710.398232][ T1096] kthread+0x361/0x430 [ 710.398247][ T1096] ? reset_hung_task_detector+0x30/0x30 [ 710.398261][ T1096] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 710.398275][ T1096] ret_from_fork+0x24/0x30 [ 710.400004][ T1096] Kernel Offset: disabled [ 713.174460][ T1096] Rebooting in 86400 seconds..