[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 31.569365] audit: type=1800 audit(1540174496.524:33): pid=5358 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 [ 31.591260] audit: type=1800 audit(1540174496.524:34): pid=5358 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: [ 36.151719] audit: type=1400 audit(1540174501.104:35): avc: denied { map } for pid=5535 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 '10.128.0.124' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program [ 133.307281] audit: type=1400 audit(1540174598.264:36): avc: denied { map } for pid=5549 comm="syz-executor795" path="/root/syz-executor795662716" 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 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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 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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 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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 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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 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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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 156.911549] audit: type=1400 audit(1540174621.864:37): avc: denied { map } for pid=14934 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_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 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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 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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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 169.105393] ================================================================== [ 169.112980] BUG: KASAN: user-memory-access in n_tty_set_termios+0x106/0xe80 [ 169.120086] Write of size 512 at addr 0000000000001060 by task syz-executor795/20053 [ 169.127972] [ 169.129620] CPU: 0 PID: 20053 Comm: syz-executor795 Not tainted 4.19.0-rc8+ #75 [ 169.137065] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 169.146422] Call Trace: [ 169.149022] dump_stack+0x1c4/0x2b6 [ 169.152660] ? dump_stack_print_info.cold.1+0x20/0x20 [ 169.157860] ? kasan_check_write+0x14/0x20 [ 169.162121] ? do_raw_spin_lock+0xc1/0x230 [ 169.166378] ? vprintk_func+0x85/0x181 [ 169.170274] kasan_report.cold.9+0x6d/0x309 [ 169.174594] ? n_tty_set_termios+0x106/0xe80 [ 169.179011] check_memory_region+0x13e/0x1b0 [ 169.183421] memset+0x23/0x40 [ 169.186537] n_tty_set_termios+0x106/0xe80 [ 169.190771] ? n_tty_poll+0xa40/0xa40 [ 169.194570] tty_set_termios+0x7a0/0xac0 [ 169.198644] ? tty_wait_until_sent+0x5d0/0x5d0 [ 169.203236] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 169.208779] set_termios+0x41e/0x7d0 [ 169.212498] ? tty_perform_flush+0x80/0x80 [ 169.216777] tty_mode_ioctl+0x857/0xb40 [ 169.220754] ? set_termios+0x7d0/0x7d0 [ 169.224645] ? tty_kref_put.part.14+0x88/0x260 [ 169.229232] ? ___might_sleep+0x1ed/0x300 [ 169.233385] ? arch_local_save_flags+0x40/0x40 [ 169.237976] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 169.243524] n_tty_ioctl_helper+0x54/0x3b0 [ 169.247779] n_tty_ioctl+0x54/0x360 [ 169.251405] ? ldsem_down_read+0x32/0x40 [ 169.255461] ? ldsem_down_read+0x32/0x40 [ 169.259533] tty_ioctl+0x5ad/0x1820 [ 169.263159] ? commit_echoes+0x1c0/0x1c0 [ 169.267224] ? tty_vhangup+0x30/0x30 [ 169.270940] ? rcu_bh_qs+0xc0/0xc0 [ 169.274507] ? ___might_sleep+0x1ed/0x300 [ 169.278662] ? arch_local_save_flags+0x40/0x40 [ 169.283245] ? kasan_check_write+0x14/0x20 [ 169.287484] ? trace_hardirqs_off+0xb8/0x310 [ 169.291909] ? tty_vhangup+0x30/0x30 [ 169.295630] do_vfs_ioctl+0x1de/0x1720 [ 169.299532] ? ioctl_preallocate+0x300/0x300 [ 169.303948] ? selinux_file_mprotect+0x620/0x620 [ 169.308703] ? path_openat+0x2822/0x5160 [ 169.312762] ? rcu_read_lock_sched_held+0x108/0x120 [ 169.317783] ? kmem_cache_free+0x24f/0x290 [ 169.322356] ? __x64_sys_futex+0x47f/0x6a0 [ 169.326596] ? do_syscall_64+0x9a/0x820 [ 169.330574] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 169.336115] ? security_file_ioctl+0x94/0xc0 [ 169.340529] ksys_ioctl+0xa9/0xd0 [ 169.343991] __x64_sys_ioctl+0x73/0xb0 [ 169.347884] do_syscall_64+0x1b9/0x820 [ 169.351769] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 169.357135] ? syscall_return_slowpath+0x5e0/0x5e0 [ 169.362068] ? trace_hardirqs_on_caller+0x310/0x310 [ 169.367086] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 169.372105] ? recalc_sigpending_tsk+0x180/0x180 [ 169.376865] ? kasan_check_write+0x14/0x20 [ 169.381107] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 169.386712] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 169.391897] RIP: 0033:0x446aa9 [ 169.395094] Code: e8 bc b9 02 00 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 fb 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 169.413995] RSP: 002b:00007f666e8a6da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 169.421709] RAX: ffffffffffffffda RBX: 00000000006dcc38 RCX: 0000000000446aa9 [ 169.428978] RDX: 0000000020000040 RSI: 0000000000005402 RDI: 0000000000000007 [ 169.436244] RBP: 00000000006dcc30 R08: 0000000000000000 R09: 0000000000000000 [ 169.443519] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc3c [ 169.450789] R13: 6d74702f7665642f R14: 6c756e2f7665642f R15: 00000000006dcd2c [ 169.458068] ================================================================== [ 169.465418] Disabling lock debugging due to kernel taint [ 169.471654] Kernel panic - not syncing: panic_on_warn set ... [ 169.471654] [ 169.479035] CPU: 0 PID: 20053 Comm: syz-executor795 Tainted: G B 4.19.0-rc8+ #75 [ 169.487877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 169.497213] Call Trace: [ 169.499784] dump_stack+0x1c4/0x2b6 [ 169.503395] ? dump_stack_print_info.cold.1+0x20/0x20 [ 169.508571] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 169.513314] panic+0x238/0x4e7 [ 169.516490] ? add_taint.cold.5+0x16/0x16 [ 169.520624] ? preempt_schedule+0x4d/0x60 [ 169.524754] ? ___preempt_schedule+0x16/0x18 [ 169.529146] ? trace_hardirqs_on+0xb4/0x310 [ 169.533449] kasan_end_report+0x47/0x4f [ 169.537407] kasan_report.cold.9+0x76/0x309 [ 169.541709] ? n_tty_set_termios+0x106/0xe80 [ 169.546102] check_memory_region+0x13e/0x1b0 [ 169.550488] memset+0x23/0x40 [ 169.553579] n_tty_set_termios+0x106/0xe80 [ 169.557797] ? n_tty_poll+0xa40/0xa40 [ 169.561623] tty_set_termios+0x7a0/0xac0 [ 169.565673] ? tty_wait_until_sent+0x5d0/0x5d0 [ 169.570239] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 169.575758] set_termios+0x41e/0x7d0 [ 169.579454] ? tty_perform_flush+0x80/0x80 [ 169.583673] tty_mode_ioctl+0x857/0xb40 [ 169.587629] ? set_termios+0x7d0/0x7d0 [ 169.591505] ? tty_kref_put.part.14+0x88/0x260 [ 169.596071] ? ___might_sleep+0x1ed/0x300 [ 169.600210] ? arch_local_save_flags+0x40/0x40 [ 169.604774] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 169.610294] n_tty_ioctl_helper+0x54/0x3b0 [ 169.614513] n_tty_ioctl+0x54/0x360 [ 169.618122] ? ldsem_down_read+0x32/0x40 [ 169.622177] ? ldsem_down_read+0x32/0x40 [ 169.626236] tty_ioctl+0x5ad/0x1820 [ 169.629846] ? commit_echoes+0x1c0/0x1c0 [ 169.633890] ? tty_vhangup+0x30/0x30 [ 169.637598] ? rcu_bh_qs+0xc0/0xc0 [ 169.641128] ? ___might_sleep+0x1ed/0x300 [ 169.645284] ? arch_local_save_flags+0x40/0x40 [ 169.649851] ? kasan_check_write+0x14/0x20 [ 169.654068] ? trace_hardirqs_off+0xb8/0x310 [ 169.658465] ? tty_vhangup+0x30/0x30 [ 169.662160] do_vfs_ioctl+0x1de/0x1720 [ 169.666033] ? ioctl_preallocate+0x300/0x300 [ 169.670425] ? selinux_file_mprotect+0x620/0x620 [ 169.675165] ? path_openat+0x2822/0x5160 [ 169.679206] ? rcu_read_lock_sched_held+0x108/0x120 [ 169.684212] ? kmem_cache_free+0x24f/0x290 [ 169.688430] ? __x64_sys_futex+0x47f/0x6a0 [ 169.692647] ? do_syscall_64+0x9a/0x820 [ 169.696604] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 169.702122] ? security_file_ioctl+0x94/0xc0 [ 169.706520] ksys_ioctl+0xa9/0xd0 [ 169.709958] __x64_sys_ioctl+0x73/0xb0 [ 169.713828] do_syscall_64+0x1b9/0x820 [ 169.717699] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 169.723043] ? syscall_return_slowpath+0x5e0/0x5e0 [ 169.727956] ? trace_hardirqs_on_caller+0x310/0x310 [ 169.732958] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 169.737980] ? recalc_sigpending_tsk+0x180/0x180 [ 169.742726] ? kasan_check_write+0x14/0x20 [ 169.746952] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 169.751780] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 169.756964] RIP: 0033:0x446aa9 [ 169.760138] Code: e8 bc b9 02 00 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 fb 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 169.779023] RSP: 002b:00007f666e8a6da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 169.786715] RAX: ffffffffffffffda RBX: 00000000006dcc38 RCX: 0000000000446aa9 [ 169.793964] RDX: 0000000020000040 RSI: 0000000000005402 RDI: 0000000000000007 [ 169.801214] RBP: 00000000006dcc30 R08: 0000000000000000 R09: 0000000000000000 [ 169.808465] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc3c [ 169.815716] R13: 6d74702f7665642f R14: 6c756e2f7665642f R15: 00000000006dcd2c [ 169.823882] Kernel Offset: disabled [ 169.827509] Rebooting in 86400 seconds..