[ 67.006582][ T24] audit: type=1800 audit(1563960819.309:29): pid=9118 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=2414 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] 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: [ 71.344777][ T24] kauditd_printk_skb: 5 callbacks suppressed [ 71.344790][ T24] audit: type=1400 audit(1563960823.649:35): avc: denied { map } for pid=9293 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 '10.128.10.6' (ECDSA) to the list of known hosts. [ 87.477727][ T24] audit: type=1400 audit(1563960839.779:36): avc: denied { map } for pid=9305 comm="syz-executor247" path="/root/syz-executor247450187" 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 [ 87.519982][ T9306] IPVS: ftp: loaded support on port[0] = 21 executing program [ 87.546267][ T24] audit: type=1400 audit(1563960839.849:37): avc: denied { associate } for pid=9306 comm="syz-executor247" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 [ 87.588105][ T9307] ------------[ cut here ]------------ [ 87.594062][ T9307] WARNING: CPU: 0 PID: 9307 at fs/overlayfs/file.c:55 ovl_real_fdget_meta.cold+0x11/0x1e [ 87.603856][ T9307] Kernel panic - not syncing: panic_on_warn set ... [ 87.610431][ T9307] CPU: 0 PID: 9307 Comm: syz-executor247 Not tainted 5.2.0+ #64 [ 87.618029][ T9307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.628068][ T9307] Call Trace: [ 87.631351][ T9307] dump_stack+0x16f/0x1f0 [ 87.635668][ T9307] ? ovl_read_iter+0x2a0/0x363 [ 87.640515][ T9307] panic+0x2dc/0x755 [ 87.644525][ T9307] ? add_taint.cold+0x16/0x16 [ 87.649209][ T9307] ? __kasan_check_write+0x14/0x20 [ 87.654299][ T9307] ? __warn.cold+0x5/0x4c [ 87.658660][ T9307] ? __warn+0xe7/0x1e0 [ 87.662732][ T9307] ? ovl_real_fdget_meta.cold+0x11/0x1e [ 87.668385][ T9307] __warn.cold+0x20/0x4c [ 87.672734][ T9307] ? ovl_real_fdget_meta.cold+0x11/0x1e [ 87.678265][ T9307] report_bug+0x263/0x2b0 [ 87.682600][ T9307] do_error_trap+0x11b/0x200 [ 87.687247][ T9307] do_invalid_op+0x37/0x50 [ 87.691672][ T9307] ? ovl_real_fdget_meta.cold+0x11/0x1e [ 87.697286][ T9307] invalid_op+0x23/0x30 [ 87.701451][ T9307] RIP: 0010:ovl_real_fdget_meta.cold+0x11/0x1e [ 87.707699][ T9307] Code: e9 b3 fd ff ff e8 0c 68 4f ff e9 fb fd ff ff e8 02 68 4f ff e9 15 fe ff ff e8 b8 a6 15 ff 48 c7 c7 a0 45 b3 87 e8 c0 db ff fe <0f> 0b 41 bc fb ff ff ff e9 68 c6 ff ff e8 9a a6 15 ff 48 c7 c7 a0 [ 87.727285][ T9307] RSP: 0018:ffff88807c487dc0 EFLAGS: 00010286 [ 87.733327][ T9307] RAX: 0000000000000024 RBX: 0000000004048000 RCX: 0000000000000000 [ 87.741511][ T9307] RDX: 0000000000000000 RSI: ffffffff815b9de2 RDI: ffffed100f890faa [ 87.749799][ T9307] RBP: ffff88807c487df0 R08: 0000000000000024 R09: ffffed1015d06079 [ 87.757947][ T9307] R10: ffffed1015d06078 R11: ffff8880ae8303c7 R12: 000000000000a000 [ 87.766004][ T9307] R13: ffff888093d102c0 R14: ffff888093d10338 R15: ffff88807dd0c460 [ 87.773994][ T9307] ? vprintk_func+0x82/0x11c [ 87.778690][ T9307] ovl_llseek+0x105/0x3b0 [ 87.783190][ T9307] ? ovl_write_iter+0xc20/0xc20 [ 87.788036][ T9307] ? mutex_lock_nested+0x16/0x20 [ 87.793205][ T9307] ? ovl_write_iter+0xc20/0xc20 [ 87.798095][ T9307] ksys_lseek+0x116/0x1b0 [ 87.802420][ T9307] __x64_sys_lseek+0x73/0xb0 [ 87.807123][ T9307] do_syscall_64+0xfd/0x6a0 [ 87.811606][ T9307] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.817476][ T9307] RIP: 0033:0x441ce9 [ 87.821351][ T9307] Code: e8 1c b4 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 87.840926][ T9307] RSP: 002b:00007fff42e375d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000008 [ 87.849634][ T9307] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441ce9 [ 87.857586][ T9307] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003 [ 87.865580][ T9307] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 87.873846][ T9307] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 87.881830][ T9307] R13: 0000000000402af0 R14: 0000000000000000 R15: 0000000000000000 [ 87.890863][ T9307] Kernel Offset: disabled [ 87.895231][ T9307] Rebooting in 86400 seconds..