[ 39.730130] audit: type=1800 audit(1581842683.282:30): pid=7856 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: [ 44.332864] kauditd_printk_skb: 4 callbacks suppressed [ 44.332879] audit: type=1400 audit(1581842687.932:35): avc: denied { map } for pid=8031 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 '10.128.0.208' (ECDSA) to the list of known hosts. executing program [ 64.841315] audit: type=1400 audit(1581842708.442:36): avc: denied { map } for pid=8043 comm="syz-executor382" path="/root/syz-executor382609789" 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 [ 64.926189] kasan: CONFIG_KASAN_INLINE enabled [ 64.926205] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 64.926222] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 64.926236] CPU: 0 PID: 8043 Comm: syz-executor382 Not tainted 4.19.104-syzkaller #0 [ 64.926242] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.926262] RIP: 0010:do_con_write.part.0+0xa03/0x1eb0 [ 64.926276] Code: 76 fe ff ff 41 01 dd e8 db df 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 [ 64.926283] RSP: 0018:ffff888091f278b0 EFLAGS: 00010203 [ 64.926293] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83b64e48 [ 64.926301] RDX: 0000000000000000 RSI: ffffffff83b64e95 RDI: 0000000000000003 [ 64.926309] RBP: ffff888091f27a48 R08: ffff888094cbe080 R09: 0000000000000005 [ 64.926318] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: dffffc0000000000 [ 64.926326] R13: 000000000000074d R14: ffff88809275d200 R15: ffff88809275d58c [ 64.926338] FS: 00000000020fb880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 64.926346] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.926355] CR2: 00007f715cbd1000 CR3: 000000008bf92000 CR4: 00000000001406f0 [ 64.926376] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.926384] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.926387] Call Trace: [ 64.926412] ? do_con_trol+0x6070/0x6070 [ 64.926428] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 64.926442] ? add_wait_queue+0x112/0x170 [ 64.926455] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 64.926469] ? trace_hardirqs_on+0x67/0x220 [ 64.926487] con_write+0x46/0xd0 [ 64.926501] n_tty_write+0x3f9/0x1140 [ 64.926522] ? process_echoes+0x170/0x170 [ 64.926539] ? do_wait_intr_irq+0x2b0/0x2b0 [ 64.926555] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 64.926570] ? _copy_from_user+0xdd/0x150 [ 64.926585] tty_write+0x458/0x7a0 [ 64.926601] ? process_echoes+0x170/0x170 [ 64.926617] __vfs_write+0x114/0x810 [ 64.926630] ? tty_read+0x2a0/0x2a0 [ 64.926643] ? kernel_read+0x120/0x120 [ 64.926657] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 64.926674] ? __inode_security_revalidate+0xda/0x120 [ 64.926688] ? avc_policy_seqno+0xd/0x70 [ 64.926701] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 64.926714] ? selinux_file_permission+0x92/0x550 [ 64.926730] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.926746] ? security_file_permission+0x89/0x230 [ 64.926761] ? rw_verify_area+0x118/0x360 [ 64.926776] vfs_write+0x20c/0x560 [ 64.926790] ksys_write+0x14f/0x2d0 [ 64.926805] ? __ia32_sys_read+0xb0/0xb0 [ 64.926820] ? do_syscall_64+0x26/0x620 [ 64.926834] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.926847] ? do_syscall_64+0x26/0x620 [ 64.926862] __x64_sys_write+0x73/0xb0 [ 64.926876] do_syscall_64+0xfd/0x620 [ 64.926892] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.926901] RIP: 0033:0x4403c9 [ 64.926914] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.926922] RSP: 002b:00007ffdae205e08 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 64.926933] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403c9 [ 64.926941] RDX: 0000000000000002 RSI: 0000000020002b40 RDI: 0000000000000004 [ 64.926949] RBP: 00000000006ca018 R08: 000000000000000e R09: 00000000004002c8 [ 64.926956] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401cb0 [ 64.926963] R13: 0000000000401d40 R14: 0000000000000000 R15: 0000000000000000 [ 64.926974] Modules linked in: [ 64.926991] ---[ end trace aa9f5d2883296c77 ]--- [ 64.927008] RIP: 0010:do_con_write.part.0+0xa03/0x1eb0 [ 64.927020] Code: 76 fe ff ff 41 01 dd e8 db df 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 [ 64.927028] RSP: 0018:ffff888091f278b0 EFLAGS: 00010203 [ 64.927038] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83b64e48 [ 64.927046] RDX: 0000000000000000 RSI: ffffffff83b64e95 RDI: 0000000000000003 [ 64.927055] RBP: ffff888091f27a48 R08: ffff888094cbe080 R09: 0000000000000005 [ 64.927064] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: dffffc0000000000 [ 64.927071] R13: 000000000000074d R14: ffff88809275d200 R15: ffff88809275d58c [ 64.927079] FS: 00000000020fb880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 64.927086] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.927094] CR2: 00007f715cbd1000 CR3: 000000008bf92000 CR4: 00000000001406f0 [ 64.927105] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.927113] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.927120] Kernel panic - not syncing: Fatal exception [ 64.928509] Kernel Offset: disabled [ 65.399604] Rebooting in 86400 seconds..