[   47.925964] audit: type=1800 audit(1580148396.065:30): pid=8107 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
Starting mcstransd: 
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   53.340607] kauditd_printk_skb: 4 callbacks suppressed
[   53.340623] audit: type=1400 audit(1580148401.505:35): avc:  denied  { map } for  pid=8283 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 '10.128.0.185' (ECDSA) to the list of known hosts.
executing program
executing program
executing program
executing program
executing program
executing program
[   60.208113] audit: type=1400 audit(1580148408.365:36): avc:  denied  { map } for  pid=8295 comm="syz-executor303" path="/root/syz-executor303102497" dev="sda1" ino=16483 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
[   60.686497] kasan: CONFIG_KASAN_INLINE enabled
[   60.686516] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   60.686535] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   60.686550] CPU: 1 PID: 319 Comm: kworker/u4:3 Not tainted 4.19.99-syzkaller #0
[   60.686558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   60.686576] Workqueue: events_unbound flush_to_ldisc
[   60.686595] RIP: 0010:do_con_write.part.0+0xa03/0x1eb0
[   60.686606] Code: 76 fe ff ff 41 01 dd e8 bb 66 b4 fd 48 8b 85 a8 fe ff ff 80 38 00 0f 85 fe 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
[   60.686612] RSP: 0018:ffff8880a921f7c0 EFLAGS: 00010203
[   60.686620] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83b6afa8
[   60.686627] RDX: 0000000000000000 RSI: ffffffff83b6aff5 RDI: 0000000000000003
[   60.686633] RBP: ffff8880a921f958 R08: ffff8880a920e080 R09: 0000000000000007
[   60.686640] R10: ffffed1015d24732 R11: ffff8880ae923993 R12: dffffc0000000000
[   60.686646] R13: 000000000000075e R14: ffff888086ca0b40 R15: ffff888086ca0ecc
[   60.686655] FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
[   60.686662] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   60.686668] CR2: 00000000004c1af3 CR3: 000000008d08d000 CR4: 00000000001406e0
[   60.686679] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   60.686686] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   60.686689] Call Trace:
[   60.686711]  ? do_con_trol+0x6070/0x6070
[   60.686728]  ? n_tty_receive_buf_common+0xaec/0x2ab0
[   60.686745]  ? do_con_write.part.0+0x1eb0/0x1eb0
[   60.686758]  con_put_char+0xfa/0x110
[   60.686772]  ? do_con_write.part.0+0x1eb0/0x1eb0
[   60.686785]  ? n_tty_receive_buf_common+0xaec/0x2ab0
[   60.686800]  ? mutex_trylock+0x1e0/0x1e0
[   60.686815]  tty_put_char+0xc5/0x160
[   60.686827]  ? dev_match_devt+0x90/0x90
[   60.686841]  ? wait_for_completion+0x440/0x440
[   60.686854]  ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[   60.686866]  ? con_write_room+0x5d/0x70
[   60.686881]  __process_echoes+0x5c8/0xa40
[   60.686897]  n_tty_receive_buf_common+0xb29/0x2ab0
[   60.686920]  n_tty_receive_buf2+0x34/0x40
[   60.686932]  tty_ldisc_receive_buf+0xad/0x1c0
[   60.686944]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   60.686957]  ? n_tty_receive_buf_common+0x2ab0/0x2ab0
[   60.686970]  tty_port_default_receive_buf+0x7d/0xb0
[   60.686982]  flush_to_ldisc+0x222/0x390
[   60.687002]  process_one_work+0x989/0x1750
[   60.687018]  ? pwq_dec_nr_in_flight+0x320/0x320
[   60.687032]  ? lock_acquire+0x16f/0x3f0
[   60.687047]  ? kasan_check_write+0x14/0x20
[   60.687059]  ? do_raw_spin_lock+0xd7/0x250
[   60.687075]  worker_thread+0x98/0xe40
[   60.687088]  ? trace_hardirqs_on+0x67/0x220
[   60.687107]  kthread+0x354/0x420
[   60.687121]  ? process_one_work+0x1750/0x1750
[   60.687136]  ? kthread_cancel_delayed_work_sync+0x20/0x20
[   60.687149]  ret_from_fork+0x24/0x30
[   60.687159] Modules linked in:
[   60.687173] ---[ end trace 172f326c0196423a ]---
[   60.687189] RIP: 0010:do_con_write.part.0+0xa03/0x1eb0
[   60.687201] Code: 76 fe ff ff 41 01 dd e8 bb 66 b4 fd 48 8b 85 a8 fe ff ff 80 38 00 0f 85 fe 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
[   60.687207] RSP: 0018:ffff8880a921f7c0 EFLAGS: 00010203
[   60.687216] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83b6afa8
[   60.687223] RDX: 0000000000000000 RSI: ffffffff83b6aff5 RDI: 0000000000000003
[   60.687231] RBP: ffff8880a921f958 R08: ffff8880a920e080 R09: 0000000000000007
[   60.687239] R10: ffffed1015d24732 R11: ffff8880ae923993 R12: dffffc0000000000
[   60.687248] R13: 000000000000075e R14: ffff888086ca0b40 R15: ffff888086ca0ecc
[   60.687258] FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
[   60.687266] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   60.687273] CR2: 00000000004c1af3 CR3: 000000008d08d000 CR4: 00000000001406e0
[   60.687280] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   60.687287] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   60.687293] Kernel panic - not syncing: Fatal exception
[   60.688917] Kernel Offset: disabled