[ 75.606289][ T27] audit: type=1400 audit(1584815431.128:37): avc: denied { watch } for pid=10498 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16179 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [ 75.650807][ T27] audit: type=1400 audit(1584815431.158:38): avc: denied { watch } for pid=10498 comm="restorecond" path="/etc/selinux/restorecond.conf" dev="sda1" ino=2232 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [....] Starting file context mai[ 75.906595][ T27] audit: type=1800 audit(1584815431.428:39): pid=10408 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 ntaining daemon:[ 75.930960][ T27] audit: type=1800 audit(1584815431.438:40): pid=10408 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 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: [ 78.614969][ T27] audit: type=1400 audit(1584815434.138:41): avc: denied { map } for pid=10586 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 '10.128.0.221' (ECDSA) to the list of known hosts. executing program [ 85.434423][ T27] audit: type=1400 audit(1584815440.958:42): avc: denied { map } for pid=10598 comm="syz-executor266" path="/root/syz-executor266716295" 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 [ 85.451400][T10599] IPVS: ftp: loaded support on port[0] = 21 [ 85.496189][T10599] netlink: 16 bytes leftover after parsing attributes in process `syz-executor266'. [ 85.542078][T10599] ------------[ cut here ]------------ [ 85.547587][T10599] refcount_t: underflow; use-after-free. [ 85.553680][T10599] WARNING: CPU: 1 PID: 10599 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 [ 85.563532][T10599] Kernel panic - not syncing: panic_on_warn set ... [ 85.570107][T10599] CPU: 1 PID: 10599 Comm: syz-executor266 Not tainted 5.6.0-rc6-syzkaller #0 [ 85.578864][T10599] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.588995][T10599] Call Trace: [ 85.592278][T10599] dump_stack+0x188/0x20d [ 85.596605][T10599] ? refcount_warn_saturate+0x170/0x1e0 [ 85.602133][T10599] panic+0x2e3/0x75c [ 85.606024][T10599] ? add_taint.cold+0x16/0x16 [ 85.610719][T10599] ? __probe_kernel_read+0x188/0x1d0 [ 85.616000][T10599] ? __warn.cold+0x14/0x35 [ 85.620418][T10599] ? __warn+0xd5/0x1c8 [ 85.624494][T10599] ? refcount_warn_saturate+0x1d1/0x1e0 [ 85.630218][T10599] __warn.cold+0x2f/0x35 [ 85.634456][T10599] ? refcount_warn_saturate+0x1d1/0x1e0 [ 85.639985][T10599] report_bug+0x27b/0x2f0 [ 85.644299][T10599] do_error_trap+0x12b/0x220 [ 85.648910][T10599] ? refcount_warn_saturate+0x1d1/0x1e0 [ 85.654581][T10599] do_invalid_op+0x32/0x40 [ 85.658986][T10599] ? refcount_warn_saturate+0x1d1/0x1e0 [ 85.664532][T10599] invalid_op+0x23/0x30 [ 85.668687][T10599] RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 [ 85.675191][T10599] Code: e9 db fe ff ff 48 89 df e8 0c 04 20 fe e9 8a fe ff ff e8 d2 45 e3 fd 48 c7 c7 00 aa 51 88 c6 05 a4 4c d2 06 01 e8 b7 56 b5 fd <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 [ 85.695204][T10599] RSP: 0018:ffffc90001f27d38 EFLAGS: 00010286 [ 85.701255][T10599] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 85.709226][T10599] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff520003e4f99 [ 85.717215][T10599] RBP: 0000000000000003 R08: ffff8880a1f52400 R09: 0000000000000000 [ 85.725206][T10599] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809f590040 [ 85.733510][T10599] R13: ffff88809f590044 R14: 00000000000002ab R15: ffff888090116380 [ 85.741789][T10599] ? vprintk_func+0x81/0x17e [ 85.746391][T10599] ? refcount_warn_saturate+0x1d1/0x1e0 [ 85.752331][T10599] free_nsproxy+0x445/0x4a0 [ 85.756839][T10599] switch_task_namespaces+0xaa/0xc0 [ 85.762027][T10599] do_exit+0xb2f/0x2dd0 [ 85.766176][T10599] ? mm_update_next_owner+0x7a0/0x7a0 [ 85.771533][T10599] ? up_read+0x1ab/0x750 [ 85.775772][T10599] ? mark_held_locks+0x9f/0xe0 [ 85.780528][T10599] ? down_read_non_owner+0x470/0x470 [ 85.785819][T10599] ? handle_mm_fault+0x491/0xa10 [ 85.790758][T10599] do_group_exit+0x125/0x340 [ 85.795337][T10599] __x64_sys_exit_group+0x3a/0x50 [ 85.800500][T10599] do_syscall_64+0xf6/0x7d0 [ 85.805006][T10599] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.811185][T10599] RIP: 0033:0x43f998 [ 85.815182][T10599] Code: 24 38 80 f9 3a 0f 85 5f 01 00 00 48 8d 74 24 34 48 8d 7c 24 38 83 ea 01 89 54 24 34 e8 61 f8 ff ff 83 f8 3c 41 89 c1 0f 87 3d <01> 00 00 8b 4c 24 34 85 c9 0f 8e 59 01 00 00 48 8b 54 24 38 c7 44 [ 85.835434][T10599] RSP: 002b:00007ffd536c7188 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 85.843844][T10599] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000043f998 [ 85.851922][T10599] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 85.859892][T10599] RBP: 00000000004bfa10 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 85.868000][T10599] R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000000001 [ 85.876042][T10599] R13: 00000000006d11c0 R14: 0000000000000000 R15: 0000000000000000 [ 85.885513][T10599] Kernel Offset: disabled [ 85.889909][T10599] Rebooting in 86400 seconds..