[ 44.952532] audit: type=1800 audit(1581509202.651:29): pid=8105 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 44.992074] audit: type=1800 audit(1581509202.651:30): pid=8105 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 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.226' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.469766] kauditd_printk_skb: 5 callbacks suppressed [ 55.469782] audit: type=1400 audit(1581509213.161:36): avc: denied { map } for pid=8295 comm="syz-executor177" path="/root/syz-executor177002793" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 55.563582] kasan: CONFIG_KASAN_INLINE enabled [ 55.563597] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 55.563619] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 55.563632] CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 4.19.103-syzkaller #0 [ 55.563640] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.563659] Workqueue: events console_callback [ 55.563679] RIP: 0010:fbcon_cursor+0x114/0x7b0 [ 55.563692] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 43 06 00 00 4d 8b bc 24 a0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <0f> b6 14 02 4c 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 4d [ 55.563699] RSP: 0018:ffff8880aa3afb00 EFLAGS: 00010203 [ 55.563708] RAX: dffffc0000000000 RBX: ffff8882196fdc80 RCX: ffffffff83b53100 [ 55.563715] RDX: 0000000020000001 RSI: ffffffff838908ec RDI: ffff8880827126a0 [ 55.563722] RBP: ffff8880aa3afb40 R08: ffff8880a54671e8 R09: ffffed1014b72f04 [ 55.563731] R10: ffffed1014b72f03 R11: ffff8880a5b9781f R12: ffff888082712300 [ 55.563739] R13: ffff8880a5466d80 R14: 0000000000000001 R15: 000000010000000c [ 55.563749] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 55.563758] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.563766] CR2: 0000000000f05d00 CR3: 00000000a9014000 CR4: 00000000001406f0 [ 55.563778] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.563784] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.563788] Call Trace: [ 55.563803] ? add_softcursor+0x1be/0x350 [ 55.563817] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.563832] set_cursor+0x1fb/0x280 [ 55.563845] redraw_screen+0x60f/0x8e0 [ 55.563860] ? con_flush_chars+0xa0/0xa0 [ 55.563873] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 55.563886] ? get_color+0x225/0x430 [ 55.563904] complete_change_console+0x105/0x3a0 [ 55.563919] change_console+0x19b/0x2c0 [ 55.563932] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.563947] console_callback+0x3a1/0x400 [ 55.563969] ? poke_blanked_console+0x270/0x270 [ 55.563991] process_one_work+0x989/0x1750 [ 55.564009] ? pwq_dec_nr_in_flight+0x320/0x320 [ 55.564024] ? lock_acquire+0x16f/0x3f0 [ 55.564039] ? kasan_check_write+0x14/0x20 [ 55.564052] ? do_raw_spin_lock+0xd7/0x250 [ 55.564068] worker_thread+0x98/0xe40 [ 55.564081] ? trace_hardirqs_on+0x67/0x220 [ 55.564100] kthread+0x354/0x420 [ 55.564114] ? process_one_work+0x1750/0x1750 [ 55.564128] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 55.564145] ret_from_fork+0x24/0x30 [ 55.564156] Modules linked in: [ 55.564173] ---[ end trace c46089ad2f94fde1 ]--- [ 55.564185] RIP: 0010:fbcon_cursor+0x114/0x7b0 [ 55.564198] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 43 06 00 00 4d 8b bc 24 a0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <0f> b6 14 02 4c 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 4d [ 55.564205] RSP: 0018:ffff8880aa3afb00 EFLAGS: 00010203 [ 55.564216] RAX: dffffc0000000000 RBX: ffff8882196fdc80 RCX: ffffffff83b53100 [ 55.564224] RDX: 0000000020000001 RSI: ffffffff838908ec RDI: ffff8880827126a0 [ 55.564232] RBP: ffff8880aa3afb40 R08: ffff8880a54671e8 R09: ffffed1014b72f04 [ 55.564239] R10: ffffed1014b72f03 R11: ffff8880a5b9781f R12: ffff888082712300 [ 55.564247] R13: ffff8880a5466d80 R14: 0000000000000001 R15: 000000010000000c [ 55.564258] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 55.564267] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.564275] CR2: 0000000000f05d00 CR3: 00000000a9014000 CR4: 00000000001406f0 [ 55.564286] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.564294] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.564300] Kernel panic - not syncing: Fatal exception [ 55.566059] Kernel Offset: disabled [ 55.932556] Rebooting in 86400 seconds..