[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[ 87.859914][ T26] audit: type=1400 audit(1578765128.199:37): avc: denied { watch } for pid=10625 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 [ 87.885100][ T26] audit: type=1400 audit(1578765128.199:38): avc: denied { watch } for pid=10625 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 [?25l[?1c7[ ok 8[?25h[?0c. [ 88.029232][ T26] audit: type=1800 audit(1578765128.369:39): pid=10532 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 [ 88.052380][ T26] audit: type=1800 audit(1578765128.369:40): pid=10532 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: [ 90.535770][ T26] audit: type=1400 audit(1578765130.879:41): 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 '10.128.0.194' (ECDSA) to the list of known hosts. executing program [ 97.238092][ T26] audit: type=1400 audit(1578765137.579:42): avc: denied { map } for pid=10721 comm="syz-executor441" path="/root/syz-executor441529307" 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 [ 97.257522][T10721] ------------[ cut here ]------------ [ 97.265745][ T26] audit: type=1400 audit(1578765137.579:43): avc: denied { associate } for pid=10721 comm="syz-executor441" name="file0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 [ 97.270596][T10721] WARNING: CPU: 1 PID: 10721 at fs/overlayfs/file.c:55 ovl_real_fdget_meta+0x4a3/0x540 [ 97.303446][T10721] Kernel panic - not syncing: panic_on_warn set ... [ 97.310017][T10721] CPU: 1 PID: 10721 Comm: syz-executor441 Not tainted 5.5.0-rc5-syzkaller #0 [ 97.318967][T10721] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.329006][T10721] Call Trace: [ 97.332290][T10721] dump_stack+0x197/0x210 [ 97.336606][T10721] ? ovl_real_fdget_meta+0x410/0x540 [ 97.341870][T10721] panic+0x2e3/0x75c [ 97.345746][T10721] ? add_taint.cold+0x16/0x16 [ 97.350405][T10721] ? printk+0xba/0xed [ 97.354373][T10721] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 97.359816][T10721] ? __warn.cold+0x14/0x3e [ 97.364231][T10721] ? __warn+0xd9/0x1cf [ 97.368395][T10721] ? ovl_real_fdget_meta+0x4a3/0x540 [ 97.373720][T10721] __warn.cold+0x2f/0x3e [ 97.377968][T10721] ? report_bug.cold+0x63/0xb2 [ 97.382754][T10721] ? ovl_real_fdget_meta+0x4a3/0x540 [ 97.388045][T10721] report_bug+0x289/0x300 [ 97.392504][T10721] do_error_trap+0x11b/0x200 [ 97.397133][T10721] do_invalid_op+0x37/0x50 [ 97.401543][T10721] ? ovl_real_fdget_meta+0x4a3/0x540 [ 97.406827][T10721] invalid_op+0x23/0x30 [ 97.410964][T10721] RIP: 0010:ovl_real_fdget_meta+0x4a3/0x540 [ 97.416839][T10721] Code: ff 4c 89 f7 e8 de b9 2d ff e9 fb fc ff ff e8 d4 b9 2d ff e9 c7 fc ff ff 4c 89 f7 e8 67 ba 2d ff e9 5e fd ff ff e8 5d fb ef fe <0f> 0b 41 bc fb ff ff ff e9 f9 fc ff ff e8 cb b9 2d ff e9 85 fb ff [ 97.437384][T10721] RSP: 0018:ffffc90001d57b70 EFLAGS: 00010293 [ 97.443556][T10721] RAX: ffff88808406a640 RBX: 0000000004048000 RCX: ffffffff82852966 [ 97.451508][T10721] RDX: 0000000000000000 RSI: ffffffff82852b93 RDI: 0000000000000005 [ 97.459465][T10721] RBP: ffffc90001d57ba0 R08: ffff88808406a640 R09: 0000000000000000 [ 97.467424][T10721] R10: ffffed1012cb28ae R11: ffff888096594577 R12: 000000000000a000 [ 97.475392][T10721] R13: ffff888096594000 R14: ffff888096594078 R15: ffff88808c87e848 [ 97.483369][T10721] ? ovl_real_fdget_meta+0x276/0x540 [ 97.488648][T10721] ? ovl_real_fdget_meta+0x4a3/0x540 [ 97.493918][T10721] ovl_read_iter+0x11a/0x370 [ 97.498500][T10721] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.504836][T10721] ? ovl_mmap+0x300/0x300 [ 97.509146][T10721] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.515393][T10721] ? iov_iter_init+0xee/0x220 [ 97.520098][T10721] new_sync_read+0x4d7/0x800 [ 97.524676][T10721] ? vfs_dedupe_file_range+0x780/0x780 [ 97.530125][T10721] ? avc_policy_seqno+0xd/0x70 [ 97.534885][T10721] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 97.540602][T10721] ? security_file_permission+0x8f/0x380 [ 97.546216][T10721] __vfs_read+0xe1/0x110 [ 97.550452][T10721] vfs_read+0x1f0/0x440 [ 97.554592][T10721] ksys_read+0x14f/0x290 [ 97.558824][T10721] ? kernel_write+0x130/0x130 [ 97.563489][T10721] ? do_syscall_64+0x26/0x790 [ 97.568153][T10721] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.574206][T10721] ? do_syscall_64+0x26/0x790 [ 97.578865][T10721] __x64_sys_read+0x73/0xb0 [ 97.583360][T10721] do_syscall_64+0xfa/0x790 [ 97.587853][T10721] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.593723][T10721] RIP: 0033:0x4402b9 [ 97.597599][T10721] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 97.617182][T10721] RSP: 002b:00007ffcf6d835d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 97.625571][T10721] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 97.633625][T10721] RDX: 0000000000001000 RSI: 0000000020000300 RDI: 0000000000000003 [ 97.641575][T10721] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 97.649524][T10721] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b40 [ 97.657483][T10721] R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000 [ 97.667091][T10721] Kernel Offset: disabled [ 97.671510][T10721] Rebooting in 86400 seconds..