[....] Starting OpenBSD Secure Shell server: sshd[ 11.081320] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.907078] random: sshd: uninitialized urandom read (32 bytes read) [ 24.281839] audit: type=1400 audit(1556498123.043:6): 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 [ 24.318772] random: sshd: uninitialized urandom read (32 bytes read) [ 24.811984] random: sshd: uninitialized urandom read (32 bytes read) [ 41.524531] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.243' (ECDSA) to the list of known hosts. [ 47.098462] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 47.201564] audit: type=1400 audit(1556498145.963:7): avc: denied { map } for pid=1789 comm="syz-executor973" path="/root/syz-executor973684849" dev="sda1" ino=16461 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program [ 48.315367] ------------[ cut here ]------------ [ 48.320317] WARNING: CPU: 0 PID: 1807 at fs/direct-io.c:293 dio_complete+0x641/0x7e0 [ 48.328581] Kernel panic - not syncing: panic_on_warn set ... [ 48.328581] [ 48.335940] CPU: 0 PID: 1807 Comm: syz-executor973 Not tainted 4.14.113+ #61 [ 48.343118] Call Trace: [ 48.345821] dump_stack+0xb9/0x10e [ 48.349358] panic+0x1d9/0x3c2 [ 48.352652] ? add_taint.cold+0x16/0x16 [ 48.356749] ? dio_complete+0x641/0x7e0 [ 48.360981] ? __probe_kernel_read+0x163/0x1c0 [ 48.365696] ? dio_complete+0x641/0x7e0 [ 48.369767] __warn.cold+0x2f/0x3b [ 48.373489] ? dio_complete+0x641/0x7e0 [ 48.377508] ? report_bug+0x20a/0x248 [ 48.381368] ? do_error_trap+0x1bf/0x2d0 [ 48.385427] ? math_error+0x2d0/0x2d0 [ 48.389265] ? clear_shadow_entry+0x190/0x190 [ 48.393885] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.398730] ? invalid_op+0x18/0x40 [ 48.402356] ? dio_complete+0x641/0x7e0 [ 48.406543] ? dio_complete+0x641/0x7e0 [ 48.410669] ? ext4_update_bh_state+0xe0/0xe0 [ 48.415166] ? __blockdev_direct_IO+0x8459/0xdf20 [ 48.420005] ? mark_held_locks+0xa6/0xf0 [ 48.424072] ? sb_init_dio_done_wq+0x80/0x80 [ 48.428671] ? check_preemption_disabled+0x35/0x1f0 [ 48.433794] ? delete_node+0x1eb/0x670 [ 48.437687] ? count_shadow_nodes+0x1e0/0x1e0 [ 48.442228] ? ext4_dio_get_block_unwritten_async+0x1b0/0x1b0 [ 48.448165] ? invalidate_inode_pages2_range+0x647/0x960 [ 48.453618] ? lru_add_drain_cpu+0x18e/0x3d0 [ 48.458033] ? put_pages_list+0x280/0x280 [ 48.462181] ? ext4_direct_IO+0x976/0x2800 [ 48.466423] ? ext4_dio_get_block_unwritten_async+0x1b0/0x1b0 [ 48.472310] ? ext4_da_write_begin+0x1040/0x1040 [ 48.477079] ? __filemap_fdatawrite_range+0x1ac/0x290 [ 48.482617] ? mark_held_locks+0xa6/0xf0 [ 48.486686] ? current_time+0x89/0xb0 [ 48.490480] ? filemap_check_errors+0x8b/0xb0 [ 48.495066] ? generic_file_direct_write+0x1e4/0x430 [ 48.500400] ? __generic_file_write_iter+0x209/0x550 [ 48.505590] ? generic_write_checks+0x252/0x410 [ 48.510258] ? ext4_file_write_iter+0x55a/0xe40 [ 48.514922] ? ext4_llseek+0x7f0/0x7f0 [ 48.518795] ? kasan_kmalloc.part.0+0xa6/0xd0 [ 48.523333] ? kasan_kmalloc.part.0+0x4f/0xd0 [ 48.527829] ? __kmalloc+0x143/0x340 [ 48.531536] ? iter_file_splice_write+0x156/0xa50 [ 48.536374] ? direct_splice_actor+0x118/0x160 [ 48.540951] ? splice_direct_to_actor+0x292/0x760 [ 48.545784] ? do_splice_direct+0x177/0x240 [ 48.550130] ? do_sendfile+0x493/0xb20 [ 48.554136] ? do_iter_readv_writev+0x379/0x580 [ 48.558813] ? clone_verify_area+0x1e0/0x1e0 [ 48.563219] ? avc_policy_seqno+0x5/0x10 [ 48.567365] ? security_file_permission+0x88/0x1e0 [ 48.572292] ? do_iter_write+0x152/0x550 [ 48.576447] ? kasan_unpoison_shadow+0x30/0x40 [ 48.581276] ? kasan_kmalloc+0x76/0xc0 [ 48.585157] ? vfs_iter_write+0x70/0xa0 [ 48.589172] ? iter_file_splice_write+0x560/0xa50 [ 48.594009] ? generic_file_splice_read+0x377/0x540 [ 48.599016] ? vmsplice_to_user+0x1e0/0x1e0 [ 48.603396] ? add_to_pipe+0x350/0x350 [ 48.607274] ? __inode_security_revalidate+0xcf/0x120 [ 48.612457] ? security_file_permission+0x88/0x1e0 [ 48.617386] ? vmsplice_to_user+0x1e0/0x1e0 [ 48.621704] ? direct_splice_actor+0x118/0x160 [ 48.626300] ? splice_direct_to_actor+0x292/0x760 [ 48.631134] ? generic_pipe_buf_nosteal+0x10/0x10 [ 48.635965] ? do_splice_to+0x150/0x150 [ 48.640007] ? security_file_permission+0x88/0x1e0 [ 48.645136] ? do_splice_direct+0x177/0x240 [ 48.649703] ? splice_direct_to_actor+0x760/0x760 [ 48.654650] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 48.660278] ? rcu_read_lock_sched_held+0x10a/0x130 [ 48.665401] ? do_sendfile+0x493/0xb20 [ 48.669288] ? do_compat_pwritev64+0x170/0x170 [ 48.674225] ? SyS_futex+0x1c5/0x2c3 [ 48.677928] ? SyS_futex+0x1cf/0x2c3 [ 48.681777] ? SyS_sendfile64+0x11f/0x140 [ 48.685916] ? SyS_sendfile+0x150/0x150 [ 48.690015] ? do_syscall_64+0x43/0x4b0 [ 48.693998] ? SyS_sendfile+0x150/0x150 [ 48.698198] ? do_syscall_64+0x19b/0x4b0 [ 48.702355] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 48.708340] Kernel Offset: 0x33a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 48.719562] Rebooting in 86400 seconds..