[....] Starting OpenBSD Secure Shell server: sshd[ 11.413128] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 42.222016] random: sshd: uninitialized urandom read (32 bytes read) [ 42.594272] audit: type=1400 audit(1560520690.978:6): avc: denied { map } for pid=1772 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 [ 42.654601] random: sshd: uninitialized urandom read (32 bytes read) [ 43.166953] random: sshd: uninitialized urandom read (32 bytes read) [ 43.314247] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.155' (ECDSA) to the list of known hosts. [ 48.798694] random: sshd: uninitialized urandom read (32 bytes read) [ 48.888063] audit: type=1400 audit(1560520697.268:7): avc: denied { map } for pid=1784 comm="syz-executor789" path="/root/syz-executor789171377" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 50.726310] ------------[ cut here ]------------ [ 50.731161] WARNING: CPU: 0 PID: 2109 at fs/attr.c:213 notify_change2+0xab8/0xd70 [ 50.738879] Kernel panic - not syncing: panic_on_warn set ... [ 50.738879] [ 50.746235] CPU: 0 PID: 2109 Comm: syz-executor789 Not tainted 4.14.125+ #6 [ 50.753312] Call Trace: [ 50.755892] dump_stack+0xb9/0x10e [ 50.759412] panic+0x1d9/0x3c2 [ 50.762582] ? add_taint.cold+0x16/0x16 [ 50.766623] ? notify_change2+0xab8/0xd70 [ 50.770776] ? __probe_kernel_read+0x163/0x1c0 [ 50.775348] ? notify_change2+0xab8/0xd70 [ 50.779491] __warn.cold+0x2f/0x3b [ 50.783023] ? notify_change2+0xab8/0xd70 [ 50.787163] ? report_bug+0x20a/0x248 [ 50.790949] ? do_error_trap+0x1bf/0x2d0 [ 50.795006] ? math_error+0x2d0/0x2d0 [ 50.798810] ? simple_xattr_get+0xe5/0x160 [ 50.803034] ? lock_downgrade+0x5d0/0x5d0 [ 50.807475] ? lock_acquire+0x10f/0x380 [ 50.811581] ? simple_xattr_get+0x2c/0x160 [ 50.815897] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.820751] ? invalid_op+0x18/0x40 [ 50.824372] ? notify_change2+0xab8/0xd70 [ 50.828602] ? file_remove_privs+0x263/0x410 [ 50.832995] ? dentry_needs_remove_privs.part.0+0x60/0x60 [ 50.838518] ? unwind_next_frame+0x4e3/0x1810 [ 50.843075] ? deref_stack_reg+0xe0/0xe0 [ 50.847137] ? trace_hardirqs_on+0x10/0x10 [ 50.851377] ? __generic_file_write_iter+0x152/0x550 [ 50.856634] ? blkdev_write_iter+0x1fb/0x3d0 [ 50.861035] ? check_disk_change+0x120/0x120 [ 50.865428] ? kasan_kmalloc.part.0+0xa6/0xd0 [ 50.869911] ? do_splice_direct+0x177/0x240 [ 50.874211] ? do_sendfile+0x493/0xb20 [ 50.878080] ? do_iter_readv_writev+0x379/0x580 [ 50.882730] ? clone_verify_area+0x1e0/0x1e0 [ 50.887273] ? avc_policy_seqno+0x5/0x10 [ 50.891328] ? security_file_permission+0x88/0x1e0 [ 50.896398] ? do_iter_write+0x152/0x550 [ 50.900463] ? kasan_unpoison_shadow+0x30/0x40 [ 50.905032] ? kasan_kmalloc+0x76/0xc0 [ 50.908913] ? vfs_iter_write+0x70/0xa0 [ 50.912885] ? iter_file_splice_write+0x560/0xa50 [ 50.917751] ? generic_file_splice_read+0x377/0x540 [ 50.922761] ? vmsplice_to_user+0x1e0/0x1e0 [ 50.927200] ? add_to_pipe+0x350/0x350 [ 50.931076] ? __inode_security_revalidate+0xcf/0x120 [ 50.936256] ? security_file_permission+0x88/0x1e0 [ 50.941186] ? vmsplice_to_user+0x1e0/0x1e0 [ 50.945505] ? direct_splice_actor+0x118/0x160 [ 50.950131] ? splice_direct_to_actor+0x292/0x760 [ 50.954975] ? generic_pipe_buf_nosteal+0x10/0x10 [ 50.959808] ? do_splice_to+0x150/0x150 [ 50.963780] ? security_file_permission+0x88/0x1e0 [ 50.968699] ? do_splice_direct+0x177/0x240 [ 50.973008] ? splice_direct_to_actor+0x760/0x760 [ 50.977856] ? security_file_permission+0x88/0x1e0 [ 50.982783] ? do_sendfile+0x493/0xb20 [ 50.986661] ? do_compat_pwritev64+0x170/0x170 [ 50.991229] ? SyS_futex+0x1c5/0x2c3 [ 50.994937] ? SyS_futex+0x1cf/0x2c3 [ 50.998650] ? SyS_sendfile64+0x11f/0x140 [ 51.002786] ? SyS_sendfile+0x150/0x150 [ 51.006743] ? do_syscall_64+0x43/0x510 [ 51.010696] ? SyS_sendfile+0x150/0x150 [ 51.014647] ? do_syscall_64+0x19b/0x510 [ 51.018692] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 51.024676] Kernel Offset: 0x1d800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 51.035640] Rebooting in 86400 seconds..