[....] Starting OpenBSD Secure Shell server: sshd[ 10.815202] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.473829] random: sshd: uninitialized urandom read (32 bytes read) [ 28.734824] audit: type=1400 audit(1539433887.189:6): avc: denied { map } for pid=1765 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 [ 28.775746] random: sshd: uninitialized urandom read (32 bytes read) [ 29.250143] random: sshd: uninitialized urandom read (32 bytes read) [ 47.221631] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.32' (ECDSA) to the list of known hosts. [ 52.801456] random: sshd: uninitialized urandom read (32 bytes read) [ 52.895968] audit: type=1400 audit(1539433911.349:7): avc: denied { map } for pid=1795 comm="syz-executor214" path="/root/syz-executor214464931" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 executing program executing program [ 53.988447] audit: type=1400 audit(1539433912.439:8): avc: denied { map } for pid=1906 comm="syz-executor214" path="/syzcgroup/cpu/syz1/bus" dev="sda1" ino=16514 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 65.474371] ------------[ cut here ]------------ [ 65.479459] WARNING: CPU: 0 PID: 3982 at fs/direct-io.c:293 dio_complete+0x578/0x800 [ 65.487335] Kernel panic - not syncing: panic_on_warn set ... [ 65.487335] [ 65.494684] CPU: 0 PID: 3982 Comm: syz-executor214 Not tainted 4.14.76+ #19 [ 65.501773] Call Trace: [ 65.504353] dump_stack+0xb9/0x11b [ 65.507885] ? dio_complete+0x4c0/0x800 [ 65.511854] panic+0x1bf/0x3a4 [ 65.515034] ? add_taint.cold.4+0x16/0x16 [ 65.519185] ? __probe_kernel_read+0x163/0x1c0 [ 65.523752] ? dio_complete+0x578/0x800 [ 65.527722] __warn.cold.7+0x148/0x185 [ 65.531605] ? dio_complete+0x578/0x800 [ 65.535574] report_bug+0x1f7/0x26c [ 65.539198] do_error_trap+0x1ba/0x2c0 [ 65.543068] ? math_error+0x2d0/0x2d0 [ 65.546851] ? clear_shadow_entry+0x190/0x190 [ 65.551332] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 65.556167] invalid_op+0x18/0x40 [ 65.559609] RIP: 0010:dio_complete+0x578/0x800 [ 65.564169] RSP: 0018:ffff8801d5e27070 EFLAGS: 00010297 [ 65.569522] RAX: ffff8801d5558000 RBX: ffff8801d416ad80 RCX: 0000000000000000 [ 65.576778] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801d5558024 [ 65.584037] RBP: 0000000000010000 R08: 1ffff10043eeee00 R09: 0000000000000000 [ 65.591290] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c52ad4d8 [ 65.598551] R13: 0000000000010000 R14: 0000000000000002 R15: ffff8801d416ae18 [ 65.605842] ? ext4_update_bh_state+0xe0/0xe0 [ 65.610346] __blockdev_direct_IO+0x7614/0xc4e0 [ 65.615021] ? sb_init_dio_done_wq+0x70/0x70 [ 65.619431] ? trace_hardirqs_on+0x10/0x10 [ 65.623661] ? ext4_dio_get_block_unwritten_async+0x1b0/0x1b0 [ 65.637969] ? ext4_dio_get_block_unwritten_async+0x1b0/0x1b0 [ 65.643843] ext4_direct_IO+0x905/0x27f0 [ 65.647895] ? __filemap_fdatawait_range+0x1c2/0x260 [ 65.652986] ? ext4_da_write_begin+0x1050/0x1050 [ 65.657777] ? filemap_check_errors+0x8b/0xb0 [ 65.662277] generic_file_direct_write+0x225/0x430 [ 65.667204] __generic_file_write_iter+0x213/0x540 [ 65.672115] ? generic_write_checks+0x252/0x410 [ 65.676771] ext4_file_write_iter+0x4f6/0xe20 [ 65.681276] ? ext4_file_mmap+0x1a0/0x1a0 [ 65.685429] ? kasan_kmalloc.part.1+0xa9/0xd0 [ 65.689907] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 65.694385] ? __kmalloc+0x153/0x340 [ 65.698088] ? iter_file_splice_write+0x142/0xab0 [ 65.702926] ? direct_splice_actor+0x116/0x160 [ 65.707489] ? splice_direct_to_actor+0x28c/0x750 [ 65.712310] ? do_splice_direct+0x17b/0x220 [ 65.716622] do_iter_readv_writev+0x3a4/0x560 [ 65.721125] ? clone_verify_area+0x1e0/0x1e0 [ 65.725521] ? security_file_permission+0x88/0x1e0 [ 65.730445] do_iter_write+0x156/0x530 [ 65.734315] ? kasan_unpoison_shadow+0x30/0x40 [ 65.738876] ? kasan_kmalloc+0x76/0xc0 [ 65.742771] vfs_iter_write+0x70/0xa0 [ 65.746556] iter_file_splice_write+0x5b4/0xab0 [ 65.751212] ? vmsplice_to_user+0x1e0/0x1e0 [ 65.755519] ? avc_policy_seqno+0x5/0x10 [ 65.759587] ? vmsplice_to_user+0x1e0/0x1e0 [ 65.763898] direct_splice_actor+0x116/0x160 [ 65.768292] splice_direct_to_actor+0x28c/0x750 [ 65.772943] ? pipe_to_sendpage+0x300/0x300 [ 65.777246] ? do_splice_to+0x150/0x150 [ 65.781206] ? security_file_permission+0x88/0x1e0 [ 65.786138] do_splice_direct+0x17b/0x220 [ 65.790271] ? splice_direct_to_actor+0x750/0x750 [ 65.795098] ? rcu_read_lock_sched_held+0x102/0x120 [ 65.800110] do_sendfile+0x4a1/0xb50 [ 65.803825] ? do_compat_pwritev64+0x170/0x170 [ 65.808386] ? __might_fault+0xd4/0x1b0 [ 65.812346] ? __might_fault+0x177/0x1b0 [ 65.816401] SyS_sendfile64+0xab/0x140 [ 65.820279] ? SyS_sendfile+0x150/0x150 [ 65.824250] ? do_syscall_64+0x43/0x4b0 [ 65.828214] ? SyS_sendfile+0x150/0x150 [ 65.832179] do_syscall_64+0x19b/0x4b0 [ 65.836073] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 65.841249] RIP: 0033:0x4489d9 [ 65.844419] RSP: 002b:00007f8693cced18 EFLAGS: 00000297 ORIG_RAX: 0000000000000028 [ 65.852103] RAX: ffffffffffffffda RBX: 00000000006e4a28 RCX: 00000000004489d9 [ 65.859353] RDX: 0000000020d83ff8 RSI: 0000000000000007 RDI: 0000000000000005 [ 65.866606] RBP: 00000000006e4a20 R08: 0000000000000000 R09: 65732f636f72702f [ 65.873863] R10: 00008000fffffffe R11: 0000000000000297 R12: 00000000006e4a2c [ 65.881117] R13: 00007f8693cced20 R14: 70756f7267632f2e R15: 00000000006e4a20 [ 65.888759] Kernel Offset: 0x28000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 65.899686] Rebooting in 86400 seconds..