[....] Starting file context maintaining daemon: 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: [ 22.281539] random: sshd: uninitialized urandom read (32 bytes read) [ 22.697273] audit: type=1400 audit(1543314891.057:6): avc: denied { map } for pid=1764 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 [ 22.743653] random: sshd: uninitialized urandom read (32 bytes read) [ 23.224191] random: sshd: uninitialized urandom read (32 bytes read) [ 23.385055] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts. [ 29.047274] random: sshd: uninitialized urandom read (32 bytes read) [ 29.140438] audit: type=1400 audit(1543314897.507:7): avc: denied { map } for pid=1776 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2018/11/27 10:34:58 parsed 1 programs [ 29.702200] audit: type=1400 audit(1543314898.067:8): avc: denied { map } for pid=1776 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=4999 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 [ 30.186092] random: cc1: uninitialized urandom read (8 bytes read) 2018/11/27 10:34:59 executed programs: 0 [ 31.552849] audit: type=1400 audit(1543314899.917:9): avc: denied { map } for pid=1776 comm="syz-execprog" path="/root/syzkaller-shm407713042" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 34.500549] ------------[ cut here ]------------ [ 34.505360] WARNING: CPU: 0 PID: 2236 at fs/direct-io.c:293 dio_complete+0x578/0x800 [ 34.513219] Kernel panic - not syncing: panic_on_warn set ... [ 34.513219] [ 34.520563] CPU: 0 PID: 2236 Comm: syz-executor0 Not tainted 4.14.83+ #9 [ 34.527394] Call Trace: [ 34.529960] dump_stack+0xb9/0x11b [ 34.533478] ? dio_complete+0x4c0/0x800 [ 34.537434] panic+0x1bf/0x3a4 [ 34.540606] ? add_taint.cold.4+0x16/0x16 [ 34.544760] ? __probe_kernel_read+0x163/0x1c0 [ 34.549343] ? dio_complete+0x578/0x800 [ 34.553297] __warn.cold.7+0x2f/0x35 [ 34.556997] ? dio_complete+0x578/0x800 [ 34.560959] report_bug+0x1f7/0x26c [ 34.564566] do_error_trap+0x1ba/0x2c0 [ 34.568431] ? math_error+0x2d0/0x2d0 [ 34.572225] ? clear_shadow_entry+0x190/0x190 [ 34.576705] ? debug_object_activate+0x4e0/0x4e0 [ 34.581459] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.586287] invalid_op+0x18/0x40 [ 34.589718] RIP: 0010:dio_complete+0x578/0x800 [ 34.594275] RSP: 0018:ffff8801caf77070 EFLAGS: 00010297 [ 34.599617] RAX: ffff8801cb07de00 RBX: ffff8801cae28000 RCX: 0000000000000000 [ 34.606863] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801cb07de24 [ 34.614111] RBP: 0000000000008200 R08: 1ffff10039bb3e00 R09: 0000000000000000 [ 34.621357] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c482dcf0 [ 34.628615] R13: 0000000000008200 R14: 0000000000000002 R15: ffff8801cae28098 [ 34.635881] ? ext4_update_bh_state+0xe0/0xe0 [ 34.640364] __blockdev_direct_IO+0x7614/0xc4e0 [ 34.645071] ? sb_init_dio_done_wq+0x70/0x70 [ 34.649486] ? release_pages+0x6e3/0xa90 [ 34.653531] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 34.658639] ? ext4_dio_get_block_unwritten_async+0x1b0/0x1b0 [ 34.664546] ? ext4_dio_get_block_unwritten_async+0x1b0/0x1b0 [ 34.670413] ext4_direct_IO+0x905/0x27f0 [ 34.674461] ? __filemap_fdatawait_range+0x1c2/0x260 [ 34.679564] ? ext4_da_write_begin+0x1050/0x1050 [ 34.684329] ? current_time+0x89/0xb0 [ 34.688117] ? filemap_check_errors+0x8b/0xb0 [ 34.692600] generic_file_direct_write+0x225/0x430 [ 34.697515] __generic_file_write_iter+0x213/0x540 [ 34.702421] ? generic_write_checks+0x252/0x410 [ 34.707093] ext4_file_write_iter+0x4f6/0xe20 [ 34.711573] ? ext4_file_mmap+0x1a0/0x1a0 [ 34.715703] ? kasan_kmalloc.part.1+0xa9/0xd0 [ 34.720194] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 34.724699] ? __kmalloc+0x153/0x340 [ 34.728390] ? iter_file_splice_write+0x142/0xab0 [ 34.733209] ? direct_splice_actor+0x116/0x160 [ 34.737765] ? splice_direct_to_actor+0x28c/0x750 [ 34.742586] ? do_splice_direct+0x17b/0x220 [ 34.746910] do_iter_readv_writev+0x3a4/0x560 [ 34.751414] ? clone_verify_area+0x1e0/0x1e0 [ 34.755804] ? security_file_permission+0x88/0x1e0 [ 34.760715] do_iter_write+0x156/0x530 [ 34.764589] ? kasan_unpoison_shadow+0x30/0x40 [ 34.769154] ? kasan_kmalloc+0x76/0xc0 [ 34.773024] vfs_iter_write+0x70/0xa0 [ 34.776806] iter_file_splice_write+0x5b4/0xab0 [ 34.781479] ? vmsplice_to_user+0x1e0/0x1e0 [ 34.785799] ? avc_policy_seqno+0x5/0x10 [ 34.789849] ? vmsplice_to_user+0x1e0/0x1e0 [ 34.794156] direct_splice_actor+0x116/0x160 [ 34.798563] splice_direct_to_actor+0x28c/0x750 [ 34.803219] ? pipe_to_sendpage+0x300/0x300 [ 34.807533] ? do_splice_to+0x150/0x150 [ 34.811486] ? security_file_permission+0x88/0x1e0 [ 34.816408] do_splice_direct+0x17b/0x220 [ 34.820534] ? splice_direct_to_actor+0x750/0x750 [ 34.825380] ? rcu_read_lock_sched_held+0x102/0x120 [ 34.830387] do_sendfile+0x4a1/0xb50 [ 34.834117] ? do_compat_pwritev64+0x170/0x170 [ 34.838684] ? _copy_to_user+0x7f/0xc0 [ 34.842555] ? put_timespec64+0xb9/0x110 [ 34.846593] ? nsecs_to_jiffies+0x30/0x30 [ 34.850722] SyS_sendfile64+0x11f/0x140 [ 34.854673] ? SyS_sendfile+0x150/0x150 [ 34.858628] ? do_clock_gettime+0xb0/0xb0 [ 34.862756] ? do_syscall_64+0x43/0x4b0 [ 34.866709] ? SyS_sendfile+0x150/0x150 [ 34.870663] do_syscall_64+0x19b/0x4b0 [ 34.874535] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 34.879700] RIP: 0033:0x457569 [ 34.882874] RSP: 002b:00007f2479038c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 34.890581] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457569 [ 34.897862] RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000008 [ 34.905125] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 34.912371] R10: 00008000fffffffe R11: 0000000000000246 R12: 00007f24790396d4 [ 34.919619] R13: 00000000004c3c2a R14: 00000000004d63d0 R15: 00000000ffffffff [ 34.927356] Kernel Offset: 0xd200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 34.938187] Rebooting in 86400 seconds..