[ 70.573468][ T27] audit: type=1800 audit(1579867179.580:24): pid=9637 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 71.169202][ T27] audit: type=1800 audit(1579867180.320:25): pid=9637 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 71.190019][ T27] audit: type=1800 audit(1579867180.320:26): pid=9637 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.45' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 97.565947][ T9797] kasan: CONFIG_KASAN_INLINE enabled [ 97.565981][ T9797] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 97.565998][ T9797] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 97.566010][ T9797] CPU: 1 PID: 9797 Comm: syz-executor263 Not tainted 5.5.0-rc7-syzkaller #0 [ 97.566017][ T9797] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.566038][ T9797] RIP: 0010:do_con_write.part.0+0xa01/0x1ef0 [ 97.566057][ T9797] Code: 7e fe ff ff 45 01 ef e8 cd 71 87 fd 48 8b 85 c8 fe ff ff 80 38 00 0f 85 71 12 00 00 49 8b 9e a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 20 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 97.566063][ T9797] RSP: 0018:ffffc9000202f828 EFLAGS: 00010203 [ 97.566073][ T9797] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83ed8540 [ 97.566079][ T9797] RDX: 0000000000000000 RSI: ffffffff83ed8593 RDI: 0000000000000003 [ 97.566086][ T9797] RBP: ffffc9000202f9b8 R08: ffff88809145a380 R09: ffff88809145ac10 [ 97.566093][ T9797] R10: fffffbfff14f69d8 R11: ffffffff8a7b4ec7 R12: dffffc0000000000 [ 97.566099][ T9797] R13: 0000000000000000 R14: ffff8880a6d56000 R15: 0000000000000764 [ 97.566109][ T9797] FS: 0000000000000000(0000) GS:ffff8880ae900000(0063) knlGS:0000000009b05840 [ 97.566116][ T9797] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 97.566122][ T9797] CR2: 0000000020001440 CR3: 000000009eb2a000 CR4: 00000000001406e0 [ 97.566133][ T9797] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.566139][ T9797] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.566142][ T9797] Call Trace: [ 97.566166][ T9797] ? do_con_trol+0x61b0/0x61b0 [ 97.566180][ T9797] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 97.566192][ T9797] ? add_wait_queue+0x112/0x170 [ 97.566203][ T9797] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 97.566219][ T9797] ? trace_hardirqs_on+0x67/0x240 [ 97.566236][ T9797] con_write+0x46/0xd0 [ 97.566252][ T9797] n_tty_write+0x40e/0x1080 [ 97.566272][ T9797] ? n_tty_read+0x1bf0/0x1bf0 [ 97.566285][ T9797] ? prepare_to_wait_exclusive+0x320/0x320 [ 97.566301][ T9797] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.566315][ T9797] ? _copy_from_user+0x12c/0x1a0 [ 97.566328][ T9797] tty_write+0x496/0x7f0 [ 97.566342][ T9797] ? n_tty_read+0x1bf0/0x1bf0 [ 97.566357][ T9797] do_iter_write+0x4a0/0x610 [ 97.566373][ T9797] ? import_iovec+0x410/0x410 [ 97.566389][ T9797] compat_writev+0x1f1/0x390 [ 97.566448][ T9797] ? do_pwritev+0x280/0x280 [ 97.566473][ T9797] ? find_held_lock+0x35/0x130 [ 97.566490][ T9797] ? __do_page_fault+0x56a/0xd80 [ 97.566504][ T9797] ? lock_downgrade+0x920/0x920 [ 97.566522][ T9797] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.566536][ T9797] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.566549][ T9797] ? __fget_light+0x1a9/0x230 [ 97.566564][ T9797] do_compat_writev+0xf5/0x1f0 [ 97.566578][ T9797] ? compat_writev+0x390/0x390 [ 97.566594][ T9797] ? do_fast_syscall_32+0xd1/0xe16 [ 97.566607][ T9797] ? entry_SYSENTER_compat+0x70/0x7f [ 97.566621][ T9797] ? do_fast_syscall_32+0xd1/0xe16 [ 97.566636][ T9797] __ia32_compat_sys_writev+0x74/0xb0 [ 97.566651][ T9797] do_fast_syscall_32+0x27b/0xe16 [ 97.566674][ T9797] entry_SYSENTER_compat+0x70/0x7f [ 97.566683][ T9797] RIP: 0023:0xf7f159a9 [ 97.566696][ T9797] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 97.566703][ T9797] RSP: 002b:00000000ffc39b7c EFLAGS: 00000246 ORIG_RAX: 0000000000000092 [ 97.566714][ T9797] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020001440 [ 97.566720][ T9797] RDX: 0000000000000001 RSI: 0000000000000001 RDI: 00000000ffc39c94 [ 97.566727][ T9797] RBP: 00000000ffc39c9c R08: 0000000000000000 R09: 0000000000000000 [ 97.566733][ T9797] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 97.566739][ T9797] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 97.566748][ T9797] Modules linked in: [ 97.566919][ T9797] ---[ end trace 9e7ccf548b0f19b6 ]--- [ 97.566936][ T9797] RIP: 0010:do_con_write.part.0+0xa01/0x1ef0 [ 97.566947][ T9797] Code: 7e fe ff ff 45 01 ef e8 cd 71 87 fd 48 8b 85 c8 fe ff ff 80 38 00 0f 85 71 12 00 00 49 8b 9e a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 20 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 97.566952][ T9797] RSP: 0018:ffffc9000202f828 EFLAGS: 00010203 [ 97.566960][ T9797] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83ed8540 [ 97.566966][ T9797] RDX: 0000000000000000 RSI: ffffffff83ed8593 RDI: 0000000000000003 [ 97.566973][ T9797] RBP: ffffc9000202f9b8 R08: ffff88809145a380 R09: ffff88809145ac10 [ 97.566979][ T9797] R10: fffffbfff14f69d8 R11: ffffffff8a7b4ec7 R12: dffffc0000000000 [ 97.566985][ T9797] R13: 0000000000000000 R14: ffff8880a6d56000 R15: 0000000000000764 [ 97.566994][ T9797] FS: 0000000000000000(0000) GS:ffff8880ae900000(0063) knlGS:0000000009b05840 [ 97.567000][ T9797] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 97.567006][ T9797] CR2: 0000000020001440 CR3: 000000009eb2a000 CR4: 00000000001406e0 [ 97.567016][ T9797] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.567024][ T9797] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.567031][ T9797] Kernel panic - not syncing: Fatal exception [ 97.568611][ T9797] Kernel Offset: disabled [ 98.087057][ T9797] Rebooting in 86400 seconds..