[ 88.692388][ T27] audit: type=1400 audit(1584823247.763:37): avc: denied { watch } for pid=10624 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 [ 88.727758][ T27] audit: type=1400 audit(1584823247.793:38): avc: denied { watch } for pid=10624 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 88.931630][ T27] audit: type=1800 audit(1584823248.003:39): pid=10533 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 [ 88.954092][ T27] audit: type=1800 audit(1584823248.003:40): pid=10533 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 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 92.119929][ T27] audit: type=1400 audit(1584823251.193:41): avc: denied { map } for pid=10709 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 '10.128.0.189' (ECDSA) to the list of known hosts. executing program [ 99.154140][ T27] audit: type=1400 audit(1584823258.223:42): avc: denied { map } for pid=10721 comm="syz-executor795" path="/root/syz-executor795196675" 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 [ 99.171008][T10722] IPVS: ftp: loaded support on port[0] = 21 [ 99.216209][T10722] netlink: 16 bytes leftover after parsing attributes in process `syz-executor795'. [ 99.268602][T10722] ------------[ cut here ]------------ [ 99.274134][T10722] refcount_t: underflow; use-after-free. [ 99.280217][T10722] WARNING: CPU: 0 PID: 10722 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 [ 99.289793][T10722] Kernel panic - not syncing: panic_on_warn set ... [ 99.296399][T10722] CPU: 0 PID: 10722 Comm: syz-executor795 Not tainted 5.6.0-rc6-syzkaller #0 [ 99.305274][T10722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.315325][T10722] Call Trace: [ 99.318616][T10722] dump_stack+0x188/0x20d [ 99.323069][T10722] ? refcount_warn_saturate+0x170/0x1e0 [ 99.328620][T10722] panic+0x2e3/0x75c [ 99.332500][T10722] ? add_taint.cold+0x16/0x16 [ 99.337182][T10722] ? __probe_kernel_read+0x188/0x1d0 [ 99.342445][T10722] ? __warn.cold+0x14/0x35 [ 99.346838][T10722] ? __warn+0xd5/0x1c8 [ 99.350898][T10722] ? refcount_warn_saturate+0x1d1/0x1e0 [ 99.356438][T10722] __warn.cold+0x2f/0x35 [ 99.360794][T10722] ? refcount_warn_saturate+0x1d1/0x1e0 [ 99.366326][T10722] report_bug+0x27b/0x2f0 [ 99.370685][T10722] do_error_trap+0x12b/0x220 [ 99.375271][T10722] ? refcount_warn_saturate+0x1d1/0x1e0 [ 99.380807][T10722] do_invalid_op+0x32/0x40 [ 99.385207][T10722] ? refcount_warn_saturate+0x1d1/0x1e0 [ 99.390736][T10722] invalid_op+0x23/0x30 [ 99.394882][T10722] RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 [ 99.401025][T10722] 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 [ 99.420606][T10722] RSP: 0018:ffffc90008a77d38 EFLAGS: 00010286 [ 99.426648][T10722] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 99.434594][T10722] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff5200114ef99 [ 99.442638][T10722] RBP: 0000000000000003 R08: ffff8880944b0200 R09: 0000000000000000 [ 99.450625][T10722] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880815e6040 [ 99.459291][T10722] R13: ffff8880815e6044 R14: 00000000000002ab R15: ffff888095b8ed80 [ 99.467456][T10722] ? vprintk_func+0x81/0x17e [ 99.472036][T10722] ? refcount_warn_saturate+0x1d1/0x1e0 [ 99.477689][T10722] free_nsproxy+0x445/0x4a0 [ 99.482199][T10722] switch_task_namespaces+0xaa/0xc0 [ 99.487447][T10722] do_exit+0xb2f/0x2dd0 [ 99.491606][T10722] ? mm_update_next_owner+0x7a0/0x7a0 [ 99.496959][T10722] ? up_read+0x1ab/0x750 [ 99.501192][T10722] ? mark_held_locks+0x9f/0xe0 [ 99.505936][T10722] ? down_read_non_owner+0x470/0x470 [ 99.511207][T10722] ? handle_mm_fault+0x491/0xa10 [ 99.516141][T10722] do_group_exit+0x125/0x340 [ 99.520734][T10722] __x64_sys_exit_group+0x3a/0x50 [ 99.525746][T10722] do_syscall_64+0xf6/0x7d0 [ 99.530288][T10722] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.536159][T10722] RIP: 0033:0x43f998 [ 99.540061][T10722] Code: Bad RIP value. [ 99.544106][T10722] RSP: 002b:00007ffd6bb41628 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 99.552499][T10722] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000043f998 [ 99.560465][T10722] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 99.568543][T10722] RBP: 00000000004bfa10 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 99.576497][T10722] R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000000001 [ 99.584462][T10722] R13: 00000000006d11c0 R14: 0000000000000000 R15: 0000000000000000 [ 99.593653][T10722] Kernel Offset: disabled [ 99.598032][T10722] Rebooting in 86400 seconds..