[ 89.303721][ T27] audit: type=1400 audit(1584819814.211:37): avc: denied { watch } for pid=10227 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 [ 89.357648][ T27] audit: type=1400 audit(1584819814.211:38): avc: denied { watch } for pid=10227 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. [ 89.536360][ T27] audit: type=1800 audit(1584819814.451:39): pid=10132 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 [ 89.558736][ T27] audit: type=1800 audit(1584819814.451:40): pid=10132 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: [ 93.194115][ T27] audit: type=1400 audit(1584819818.111:41): avc: denied { map } for pid=10308 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 '10.128.0.107' (ECDSA) to the list of known hosts. executing program [ 104.748196][ T27] audit: type=1400 audit(1584819829.661:42): avc: denied { map } for pid=10320 comm="syz-executor385" path="/root/syz-executor385353912" 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 [ 104.765480][T10321] IPVS: ftp: loaded support on port[0] = 21 [ 104.809123][T10321] netlink: 16 bytes leftover after parsing attributes in process `syz-executor385'. [ 104.855303][T10321] ------------[ cut here ]------------ [ 104.861298][T10321] refcount_t: underflow; use-after-free. [ 104.867329][T10321] WARNING: CPU: 1 PID: 10321 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 [ 104.876785][T10321] Kernel panic - not syncing: panic_on_warn set ... [ 104.883380][T10321] CPU: 1 PID: 10321 Comm: syz-executor385 Not tainted 5.6.0-rc6-syzkaller #0 [ 104.892109][T10321] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 104.902153][T10321] Call Trace: [ 104.905436][T10321] dump_stack+0x188/0x20d [ 104.909760][T10321] ? refcount_warn_saturate+0x170/0x1e0 [ 104.915430][T10321] panic+0x2e3/0x75c [ 104.919314][T10321] ? add_taint.cold+0x16/0x16 [ 104.923984][T10321] ? __probe_kernel_read+0x188/0x1d0 [ 104.929248][T10321] ? __warn.cold+0x14/0x35 [ 104.933642][T10321] ? __warn+0xd5/0x1c8 [ 104.937693][T10321] ? refcount_warn_saturate+0x1d1/0x1e0 [ 104.943844][T10321] __warn.cold+0x2f/0x35 [ 104.948065][T10321] ? refcount_warn_saturate+0x1d1/0x1e0 [ 104.953589][T10321] report_bug+0x27b/0x2f0 [ 104.958005][T10321] do_error_trap+0x12b/0x220 [ 104.962726][T10321] ? refcount_warn_saturate+0x1d1/0x1e0 [ 104.968263][T10321] do_invalid_op+0x32/0x40 [ 104.972739][T10321] ? refcount_warn_saturate+0x1d1/0x1e0 [ 104.978287][T10321] invalid_op+0x23/0x30 [ 104.982425][T10321] RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 [ 104.988558][T10321] 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 [ 105.008141][T10321] RSP: 0018:ffffc90001ee7d38 EFLAGS: 00010286 [ 105.014194][T10321] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 105.022151][T10321] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff520003dcf99 [ 105.030110][T10321] RBP: 0000000000000003 R08: ffff88809215c580 R09: 0000000000000000 [ 105.038057][T10321] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a329a040 [ 105.046003][T10321] R13: ffff8880a329a044 R14: 00000000000002aa R15: ffff8880919b2ec0 [ 105.053968][T10321] ? vprintk_func+0x81/0x17e [ 105.058539][T10321] ? refcount_warn_saturate+0x1d1/0x1e0 [ 105.064061][T10321] free_nsproxy+0x445/0x4a0 [ 105.068540][T10321] switch_task_namespaces+0xaa/0xc0 [ 105.073715][T10321] do_exit+0xb2f/0x2dd0 [ 105.077868][T10321] ? mm_update_next_owner+0x7a0/0x7a0 [ 105.083215][T10321] ? up_read+0x1ab/0x750 [ 105.087441][T10321] ? mark_held_locks+0x9f/0xe0 [ 105.092182][T10321] ? down_read_non_owner+0x470/0x470 [ 105.097457][T10321] ? handle_mm_fault+0x491/0xa10 [ 105.102373][T10321] do_group_exit+0x125/0x340 [ 105.106941][T10321] __x64_sys_exit_group+0x3a/0x50 [ 105.111943][T10321] do_syscall_64+0xf6/0x7d0 [ 105.116442][T10321] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.122327][T10321] RIP: 0033:0x43f998 [ 105.126257][T10321] 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 [ 105.145848][T10321] RSP: 002b:00007ffe1972c628 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 105.154250][T10321] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000043f998 [ 105.162326][T10321] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 105.170965][T10321] RBP: 00000000004bfa10 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 105.178926][T10321] R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000000001 [ 105.186988][T10321] R13: 00000000006d11c0 R14: 0000000000000000 R15: 0000000000000000 [ 105.196351][T10321] Kernel Offset: disabled [ 105.200757][T10321] Rebooting in 86400 seconds..