[ 101.316065][ T27] audit: type=1400 audit(1583984208.671:37): avc: denied { watch } for pid=10307 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 [ 101.344448][ T27] audit: type=1400 audit(1583984208.671:38): avc: denied { watch } for pid=10307 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. [ 101.502535][ T27] audit: type=1800 audit(1583984208.861:39): pid=10214 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 [ 101.524396][ T27] audit: type=1800 audit(1583984208.871:40): pid=10214 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: [ 106.336163][ T27] audit: type=1400 audit(1583984213.691:41): avc: denied { map } for pid=10392 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 '10.128.0.235' (ECDSA) to the list of known hosts. executing program [ 113.113602][ T27] audit: type=1400 audit(1583984220.471:42): avc: denied { map } for pid=10404 comm="syz-executor695" path="/root/syz-executor695757801" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 113.130459][T10405] IPVS: ftp: loaded support on port[0] = 21 [ 113.173785][T10405] netlink: 16 bytes leftover after parsing attributes in process `syz-executor695'. [ 113.227360][T10405] ------------[ cut here ]------------ [ 113.232854][T10405] refcount_t: underflow; use-after-free. [ 113.238931][T10405] WARNING: CPU: 0 PID: 10405 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 [ 113.248377][T10405] Kernel panic - not syncing: panic_on_warn set ... [ 113.254943][T10405] CPU: 0 PID: 10405 Comm: syz-executor695 Not tainted 5.6.0-rc5-syzkaller #0 [ 113.263687][T10405] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.273718][T10405] Call Trace: [ 113.276995][T10405] dump_stack+0x188/0x20d [ 113.281307][T10405] ? refcount_warn_saturate+0x1d0/0x1e0 [ 113.286831][T10405] panic+0x2e3/0x75c [ 113.290712][T10405] ? add_taint.cold+0x16/0x16 [ 113.295393][T10405] ? __probe_kernel_read+0x188/0x1d0 [ 113.300652][T10405] ? __warn.cold+0x14/0x35 [ 113.305043][T10405] ? __warn+0xd5/0x1c8 [ 113.309090][T10405] ? refcount_warn_saturate+0x1d1/0x1e0 [ 113.314609][T10405] __warn.cold+0x2f/0x35 [ 113.318838][T10405] ? refcount_warn_saturate+0x1d1/0x1e0 [ 113.324360][T10405] report_bug+0x27b/0x2f0 [ 113.328668][T10405] do_error_trap+0x12b/0x220 [ 113.333233][T10405] ? refcount_warn_saturate+0x1d1/0x1e0 [ 113.338761][T10405] do_invalid_op+0x32/0x40 [ 113.343153][T10405] ? refcount_warn_saturate+0x1d1/0x1e0 [ 113.348675][T10405] invalid_op+0x23/0x30 [ 113.352831][T10405] RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 [ 113.358970][T10405] Code: e9 db fe ff ff 48 89 df e8 fc 10 20 fe e9 8a fe ff ff e8 c2 52 e3 fd 48 c7 c7 00 aa 51 88 c6 05 c5 68 d2 06 01 e8 17 63 b5 fd <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 [ 113.378550][T10405] RSP: 0018:ffffc90001f27d38 EFLAGS: 00010286 [ 113.384588][T10405] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 113.392534][T10405] RDX: 0000000000000000 RSI: ffffffff815bf531 RDI: fffff520003e4f99 [ 113.400481][T10405] RBP: 0000000000000003 R08: ffff8880a225c0c0 R09: 0000000000000000 [ 113.408444][T10405] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880909c8040 [ 113.416406][T10405] R13: ffff8880909c8044 R14: 00000000000002aa R15: ffff88809724e440 [ 113.424398][T10405] ? vprintk_func+0x81/0x17e [ 113.429005][T10405] ? refcount_warn_saturate+0x1d1/0x1e0 [ 113.434543][T10405] free_nsproxy+0x445/0x4a0 [ 113.439065][T10405] switch_task_namespaces+0xaa/0xc0 [ 113.444247][T10405] do_exit+0xb2f/0x2dd0 [ 113.448403][T10405] ? mm_update_next_owner+0x7a0/0x7a0 [ 113.453819][T10405] ? up_read+0x1ab/0x750 [ 113.458065][T10405] ? mark_held_locks+0x9f/0xe0 [ 113.462868][T10405] ? down_read_non_owner+0x470/0x470 [ 113.468249][T10405] ? handle_mm_fault+0x491/0xa10 [ 113.473171][T10405] do_group_exit+0x125/0x340 [ 113.477792][T10405] __x64_sys_exit_group+0x3a/0x50 [ 113.482814][T10405] do_syscall_64+0xf6/0x7d0 [ 113.487304][T10405] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 113.493175][T10405] RIP: 0033:0x43f998 [ 113.497049][T10405] 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 [ 113.516920][T10405] RSP: 002b:00007ffdddc2d4e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 113.525313][T10405] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000043f998 [ 113.534396][T10405] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 113.542406][T10405] RBP: 00000000004bfa10 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 113.550368][T10405] R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000000001 [ 113.558356][T10405] R13: 00000000006d11c0 R14: 0000000000000000 R15: 0000000000000000 [ 113.567880][T10405] Kernel Offset: disabled [ 113.572262][T10405] Rebooting in 86400 seconds..