[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.886525] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.450996] random: sshd: uninitialized urandom read (32 bytes read) [ 17.963143] random: sshd: uninitialized urandom read (32 bytes read) [ 18.441841] random: sshd: uninitialized urandom read (32 bytes read) [ 36.134491] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts. [ 41.752027] random: sshd: uninitialized urandom read (32 bytes read) net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Error: argument "bridge0" is wrong: Device does not exist Error: argument "bridge0" is wrong: Device does not exist Cannot find device "veth0_to_bridge" Cannot find device "veth1_to_bridge" RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Error: argument "bond0" is wrong: Device does not exist Error: argument "bond0" is wrong: Device does not exist Cannot find device "veth0_to_bond" Cannot find device "veth1_to_bond" RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Error: argument "team0" is wrong: Device does not exist Error: argument "team0" is wrong: Device does not exist Cannot find device "veth0_to_team" Cannot find device "veth1_to_team" Cannot find device "bridge_slave_0" Cannot find device "bridge_slave_1" RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "veth0" Cannot find device "veth0" Cannot find device "veth0" Cannot find device "veth0" Cannot find device "veth1" Cannot find device "veth1" Cannot find device "veth1" Cannot find device "veth1" Cannot find device "team0" Cannot find device "team0" Cannot find device "team0" Cannot find device "team0" Cannot find device "veth0_to_bridge" Cannot find device "veth0_to_bridge" Cannot find device "veth0_to_bridge" Cannot find device "veth0_to_bridge" Cannot find device "veth1_to_bridge" Cannot find device "veth1_to_bridge" Cannot find device "veth1_to_bridge" Cannot find device "veth1_to_bridge" Cannot find device "veth0_to_bond" Cannot find device "veth0_to_bond" Cannot find device "veth0_to_bond" Cannot find device "veth0_to_bond" Cannot find device "veth1_to_bond" Cannot find device "veth1_to_bond" Cannot find device "veth1_to_bond" Cannot find device "veth1_to_bond" Cannot find device "veth0_to_team" Cannot find device "veth0_to_team" Cannot find device "veth0_to_team" Cannot find device "veth0_to_team" Cannot find device "veth1_to_team" Cannot find device "veth1_to_team" Cannot find device "veth1_to_team" Cannot find device "veth1_to_team" executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 52.853741] ------------[ cut here ]------------ [ 52.858604] WARNING: CPU: 0 PID: 2802 at fs/direct-io.c:293 dio_complete+0x578/0x800 [ 52.866469] Kernel panic - not syncing: panic_on_warn set ... [ 52.866469] [ 52.873816] CPU: 0 PID: 2802 Comm: syz-executor827 Not tainted 4.14.67+ #1 [ 52.880808] Call Trace: [ 52.883421] dump_stack+0xb9/0x11b [ 52.886997] ? dio_complete+0x4c0/0x800 [ 52.890961] panic+0x1bf/0x3a4 [ 52.894133] ? add_taint.cold.4+0x16/0x16 [ 52.898264] ? __probe_kernel_read+0x163/0x1c0 [ 52.902828] ? dio_complete+0x578/0x800 [ 52.906827] __warn.cold.7+0x148/0x185 [ 52.910699] ? dio_complete+0x578/0x800 [ 52.914657] report_bug+0x1f7/0x26c [ 52.918270] do_error_trap+0x1ba/0x2c0 [ 52.922142] ? math_error+0x2d0/0x2d0 [ 52.926668] ? clear_shadow_entry+0x190/0x190 [ 52.931278] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.936103] invalid_op+0x18/0x40 [ 52.939534] RIP: 0010:dio_complete+0x578/0x800 [ 52.944086] RSP: 0018:ffff8801c5307070 EFLAGS: 00010297 [ 52.949427] RAX: ffff8801c510af00 RBX: ffff8801c5a8c680 RCX: 0000000000000000 [ 52.956678] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801c510af24 [ 52.964139] RBP: 0000000000010000 R08: 1ffff10039cbba00 R09: 0000000000000000 [ 52.971388] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d93d8c00 [ 52.978637] R13: 0000000000010000 R14: 0000000000000002 R15: ffff8801c5a8c718 [ 52.985913] ? ext4_update_bh_state+0xe0/0xe0 [ 52.990399] __blockdev_direct_IO+0x7614/0xc4e0 [ 52.995063] ? sb_init_dio_done_wq+0x70/0x70 [ 52.999564] ? trace_hardirqs_on+0x10/0x10 [ 53.003835] ? ext4_dio_get_block_unwritten_async+0x1b0/0x1b0 [ 53.009731] ? ext4_dio_get_block_unwritten_async+0x1b0/0x1b0 [ 53.015603] ext4_direct_IO+0x905/0x27f0 [ 53.019655] ? __filemap_fdatawait_range+0x1c2/0x260 [ 53.024781] ? ext4_da_write_begin+0x1050/0x1050 [ 53.029536] ? current_time+0x89/0xb0 [ 53.033315] ? filemap_check_errors+0x8b/0xb0 [ 53.037792] generic_file_direct_write+0x225/0x430 [ 53.042706] __generic_file_write_iter+0x213/0x540 [ 53.047616] ? generic_write_checks+0x252/0x410 [ 53.052265] ext4_file_write_iter+0x4f6/0xe20 [ 53.056742] ? ext4_file_mmap+0x1a0/0x1a0 [ 53.060876] ? kasan_kmalloc.part.1+0xa9/0xd0 [ 53.065355] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 53.069826] ? __kmalloc+0x153/0x340 [ 53.073516] ? iter_file_splice_write+0x142/0xab0 [ 53.078332] ? direct_splice_actor+0x116/0x160 [ 53.083174] ? splice_direct_to_actor+0x28c/0x750 [ 53.088031] ? do_splice_direct+0x17b/0x220 [ 53.092482] do_iter_readv_writev+0x3a4/0x560 [ 53.097101] ? clone_verify_area+0x1e0/0x1e0 [ 53.101542] ? security_file_permission+0x88/0x1e0 [ 53.106471] do_iter_write+0x156/0x530 [ 53.110353] ? kasan_unpoison_shadow+0x30/0x40 [ 53.114941] ? kasan_kmalloc+0x76/0xc0 [ 53.118816] vfs_iter_write+0x70/0xa0 [ 53.122611] iter_file_splice_write+0x5b4/0xab0 [ 53.127276] ? vmsplice_to_user+0x1e0/0x1e0 [ 53.131956] ? avc_policy_seqno+0x5/0x10 [ 53.136007] ? vmsplice_to_user+0x1e0/0x1e0 [ 53.140318] direct_splice_actor+0x116/0x160 [ 53.144709] splice_direct_to_actor+0x28c/0x750 [ 53.149357] ? pipe_to_sendpage+0x300/0x300 [ 53.153656] ? do_splice_to+0x150/0x150 [ 53.157637] ? security_file_permission+0x88/0x1e0 [ 53.162549] do_splice_direct+0x17b/0x220 [ 53.166679] ? splice_direct_to_actor+0x750/0x750 [ 53.171620] ? rcu_read_lock_sched_held+0x102/0x120 [ 53.176620] do_sendfile+0x4a1/0xb50 [ 53.180317] ? do_compat_pwritev64+0x170/0x170 [ 53.185076] ? __might_fault+0xd4/0x1b0 [ 53.185087] ? __might_fault+0x177/0x1b0 [ 53.185096] SyS_sendfile64+0xab/0x140 [ 53.185101] ? SyS_sendfile+0x150/0x150 [ 53.185108] ? do_syscall_64+0x43/0x4b0 [ 53.185113] ? SyS_sendfile+0x150/0x150 [ 53.185118] do_syscall_64+0x19b/0x4b0 [ 53.185128] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 53.185132] RIP: 0033:0x449019 [ 53.185134] RSP: 002b:00007fa6f7f49ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 53.185139] RAX: ffffffffffffffda RBX: 00000000006e5a08 RCX: 0000000000449019 [ 53.185142] RDX: 0000000020d83ff8 RSI: 0000000000000006 RDI: 0000000000000004 [ 53.185144] RBP: 00000000006e5a00 R08: 0000000000000000 R09: 0000000000000000 [ 53.185147] R10: 00008000fffffffe R11: 0000000000000246 R12: 00000000006e5a0c [ 53.185149] R13: 00007ffdd1a03d8f R14: 00007fa6f7f4a9c0 R15: 00000000006e5a00 [ 53.185462] Dumping ftrace buffer: [ 53.185537] (ftrace buffer empty) [ 53.185541] Kernel Offset: 0x25a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 53.283617] Rebooting in 86400 seconds..