[....] Starting OpenBSD Secure Shell server: sshd[ 11.201059] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.574354] random: sshd: uninitialized urandom read (32 bytes read) [ 24.952002] audit: type=1400 audit(1543103883.388:6): avc: denied { map } for pid=1761 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 [ 24.995028] random: sshd: uninitialized urandom read (32 bytes read) [ 25.452191] random: sshd: uninitialized urandom read (32 bytes read) [ 98.958260] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.121' (ECDSA) to the list of known hosts. [ 104.497456] random: sshd: uninitialized urandom read (32 bytes read) [ 104.591745] audit: type=1400 audit(1543103963.028:7): avc: denied { map } for pid=1821 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 2018/11/24 23:59:23 parsed 1 programs [ 105.115592] audit: type=1400 audit(1543103963.548:8): avc: denied { map } for pid=1821 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 [ 105.508781] random: cc1: uninitialized urandom read (8 bytes read) 2018/11/24 23:59:24 executed programs: 0 [ 106.138547] audit: type=1400 audit(1543103964.568:9): avc: denied { map } for pid=1821 comm="syz-execprog" path="/root/syzkaller-shm978811293" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 109.039510] ------------[ cut here ]------------ [ 109.044375] WARNING: CPU: 0 PID: 2276 at fs/direct-io.c:293 dio_complete+0x578/0x800 [ 109.052245] Kernel panic - not syncing: panic_on_warn set ... [ 109.052245] [ 109.059593] CPU: 0 PID: 2276 Comm: syz-executor0 Not tainted 4.14.83+ #9 [ 109.066411] Call Trace: [ 109.068980] dump_stack+0xb9/0x11b [ 109.072504] ? dio_complete+0x4c0/0x800 [ 109.076457] panic+0x1bf/0x3a4 [ 109.079625] ? add_taint.cold.4+0x16/0x16 [ 109.083754] ? __probe_kernel_read+0x163/0x1c0 [ 109.088327] ? dio_complete+0x578/0x800 [ 109.092277] __warn.cold.7+0x2f/0x35 [ 109.095967] ? dio_complete+0x578/0x800 [ 109.099919] report_bug+0x1f7/0x26c [ 109.103527] do_error_trap+0x1ba/0x2c0 [ 109.107392] ? math_error+0x2d0/0x2d0 [ 109.111174] ? clear_shadow_entry+0x190/0x190 [ 109.115667] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 109.120506] invalid_op+0x18/0x40 [ 109.123938] RIP: 0010:dio_complete+0x578/0x800 [ 109.128498] RSP: 0018:ffff8801c9907070 EFLAGS: 00010297 [ 109.133836] RAX: ffff8801c9862f00 RBX: ffff8801ca48a3c0 RCX: 0000000000000000 [ 109.141085] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801c9862f24 [ 109.148334] RBP: 0000000000010000 R08: 0000000000000001 R09: 0000000000000000 [ 109.155593] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c422b478 [ 109.162836] R13: 0000000000010000 R14: 0000000000000002 R15: ffff8801ca48a458 [ 109.170104] ? ext4_update_bh_state+0xe0/0xe0 [ 109.174583] __blockdev_direct_IO+0x7614/0xc4e0 [ 109.179242] ? sb_init_dio_done_wq+0x70/0x70 [ 109.183634] ? trace_hardirqs_on+0x10/0x10 [ 109.187866] ? ext4_dio_get_block_unwritten_async+0x1b0/0x1b0 [ 109.193741] ? ext4_dio_get_block_unwritten_async+0x1b0/0x1b0 [ 109.199600] ext4_direct_IO+0x905/0x27f0 [ 109.203647] ? __filemap_fdatawait_range+0x1c2/0x260 [ 109.208727] ? ext4_da_write_begin+0x1050/0x1050 [ 109.213479] ? current_time+0x89/0xb0 [ 109.217267] ? filemap_check_errors+0x8b/0xb0 [ 109.221741] generic_file_direct_write+0x225/0x430 [ 109.226650] __generic_file_write_iter+0x213/0x540 [ 109.231564] ? generic_write_checks+0x252/0x410 [ 109.236217] ext4_file_write_iter+0x4f6/0xe20 [ 109.240693] ? ext4_file_mmap+0x1a0/0x1a0 [ 109.244822] ? kasan_kmalloc.part.1+0xa9/0xd0 [ 109.249295] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 109.253763] ? __kmalloc+0x153/0x340 [ 109.257452] ? iter_file_splice_write+0x142/0xab0 [ 109.262280] ? direct_splice_actor+0x116/0x160 [ 109.266838] ? splice_direct_to_actor+0x28c/0x750 [ 109.271659] ? do_splice_direct+0x17b/0x220 [ 109.275980] do_iter_readv_writev+0x3a4/0x560 [ 109.280453] ? clone_verify_area+0x1e0/0x1e0 [ 109.284846] ? security_file_permission+0x88/0x1e0 [ 109.289758] do_iter_write+0x156/0x530 [ 109.293638] ? kasan_unpoison_shadow+0x30/0x40 [ 109.298198] ? kasan_kmalloc+0x76/0xc0 [ 109.302066] vfs_iter_write+0x70/0xa0 [ 109.305848] iter_file_splice_write+0x5b4/0xab0 [ 109.310501] ? vmsplice_to_user+0x1e0/0x1e0 [ 109.314801] ? avc_policy_seqno+0x5/0x10 [ 109.318843] ? vmsplice_to_user+0x1e0/0x1e0 [ 109.323143] direct_splice_actor+0x116/0x160 [ 109.327538] splice_direct_to_actor+0x28c/0x750 [ 109.332183] ? pipe_to_sendpage+0x300/0x300 [ 109.336490] ? do_splice_to+0x150/0x150 [ 109.340441] ? security_file_permission+0x88/0x1e0 [ 109.345358] do_splice_direct+0x17b/0x220 [ 109.349499] ? splice_direct_to_actor+0x750/0x750 [ 109.354322] ? rcu_read_lock_sched_held+0x102/0x120 [ 109.359317] do_sendfile+0x4a1/0xb50 [ 109.363011] ? do_compat_pwritev64+0x170/0x170 [ 109.367572] ? _copy_to_user+0x7f/0xc0 [ 109.371444] ? put_timespec64+0xb9/0x110 [ 109.375491] ? nsecs_to_jiffies+0x30/0x30 [ 109.379619] SyS_sendfile64+0x11f/0x140 [ 109.383578] ? SyS_sendfile+0x150/0x150 [ 109.387529] ? do_clock_gettime+0xb0/0xb0 [ 109.391656] ? do_syscall_64+0x43/0x4b0 [ 109.395609] ? SyS_sendfile+0x150/0x150 [ 109.399562] do_syscall_64+0x19b/0x4b0 [ 109.403434] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 109.408603] RIP: 0033:0x457569 [ 109.411774] RSP: 002b:00007ff7d329ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 109.419471] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457569 [ 109.426719] RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000008 [ 109.433968] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 109.441311] R10: 00008000fffffffe R11: 0000000000000246 R12: 00007ff7d329f6d4 [ 109.448559] R13: 00000000004c3c2a R14: 00000000004d63d0 R15: 00000000ffffffff [ 109.456356] Kernel Offset: 0x24200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 109.467785] Rebooting in 86400 seconds..