[....] Starting OpenBSD Secure Shell server: sshd[ 11.952968] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.012316] random: sshd: uninitialized urandom read (32 bytes read) [ 29.422561] audit: type=1400 audit(1543565578.803:6): avc: denied { map } for pid=1763 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 [ 29.470923] random: sshd: uninitialized urandom read (32 bytes read) [ 29.924887] random: sshd: uninitialized urandom read (32 bytes read) [ 30.087392] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts. [ 35.625936] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 35.730531] audit: type=1400 audit(1543565585.113:7): avc: denied { map } for pid=1781 comm="syz-executor123" path="/root/syz-executor123292635" 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 [ 35.739312] ------------[ cut here ]------------ [ 35.739328] WARNING: CPU: 0 PID: 1783 at fs/attr.c:213 notify_change2+0xae4/0xdd0 [ 35.739332] Kernel panic - not syncing: panic_on_warn set ... [ 35.739332] [ 35.739340] CPU: 0 PID: 1783 Comm: syz-executor123 Not tainted 4.14.84+ #14 [ 35.739343] Call Trace: [ 35.739355] dump_stack+0xb9/0x11b [ 35.739364] ? notify_change2+0xac0/0xdd0 [ 35.739373] panic+0x1bf/0x3a4 [ 35.739381] ? add_taint.cold.4+0x16/0x16 [ 35.739395] ? __probe_kernel_read+0x163/0x1c0 [ 35.739408] ? notify_change2+0xae4/0xdd0 [ 35.739416] __warn.cold.7+0x2f/0x35 [ 35.739424] ? notify_change2+0xae4/0xdd0 [ 35.739433] report_bug+0x1f7/0x26c [ 35.739447] do_error_trap+0x1ba/0x2c0 [ 35.739457] ? math_error+0x2d0/0x2d0 [ 35.739470] ? simple_xattr_get+0xe5/0x150 [ 35.739480] ? lock_downgrade+0x560/0x560 [ 35.739486] ? lock_acquire+0x10f/0x380 [ 35.739493] ? simple_xattr_get+0x2c/0x150 [ 35.739503] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.739520] invalid_op+0x18/0x40 [ 35.739527] RIP: 0010:notify_change2+0xae4/0xdd0 [ 35.739531] RSP: 0018:ffff8881d035f5a0 EFLAGS: 00010297 [ 35.739538] RAX: ffff8881d1072f00 RBX: 0000000000004200 RCX: 0000000000000000 [ 35.739542] RDX: 0000000000000000 RSI: ffff8881d99fcf20 RDI: ffff8881d930e860 [ 35.739546] RBP: ffff8881d035f608 R08: 0000000000000001 R09: 0000000000000000 [ 35.739551] R10: ffff8881d1073730 R11: 0000000000000001 R12: ffff8881d930e780 [ 35.739555] R13: ffff8881d035f638 R14: ffff8881d99fcf20 R15: ffff8881d930e78c [ 35.739604] ? cap_inode_need_killpriv+0x3c/0x50 [ 35.739618] file_remove_privs+0x25c/0x440 [ 35.739627] ? dentry_needs_remove_privs.part.12+0x50/0x50 [ 35.739636] ? depot_save_stack+0x20a/0x428 [ 35.739644] ? lock_downgrade+0x560/0x560 [ 35.739650] ? lock_acquire+0x10f/0x380 [ 35.739657] ? depot_save_stack+0x17f/0x428 [ 35.739666] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 35.739681] __generic_file_write_iter+0x155/0x540 [ 35.739696] blkdev_write_iter+0x1fa/0x3d0 [ 35.739704] ? kasan_kmalloc.part.1+0xa9/0xd0 [ 35.739715] ? check_disk_change+0x120/0x120 [ 35.739722] ? direct_splice_actor+0x116/0x160 [ 35.739746] do_iter_readv_writev+0x3a4/0x560 [ 35.739758] ? clone_verify_area+0x1e0/0x1e0 [ 35.739770] ? security_file_permission+0x88/0x1e0 [ 35.739786] do_iter_write+0x156/0x530 [ 35.739796] ? kasan_unpoison_shadow+0x30/0x40 [ 35.739804] ? kasan_kmalloc+0x76/0xc0 [ 35.739817] vfs_iter_write+0x70/0xa0 [ 35.739827] iter_file_splice_write+0x5b4/0xab0 [ 35.739848] ? vmsplice_to_user+0x1e0/0x1e0 [ 35.739862] ? avc_policy_seqno+0x5/0x10 [ 35.739881] ? vmsplice_to_user+0x1e0/0x1e0 [ 35.739891] direct_splice_actor+0x116/0x160 [ 35.739903] splice_direct_to_actor+0x28c/0x750 [ 35.739914] ? pipe_to_sendpage+0x300/0x300 [ 35.739932] ? do_splice_to+0x150/0x150 [ 35.739940] ? security_file_permission+0x88/0x1e0 [ 35.739955] do_splice_direct+0x17b/0x220 [ 35.739965] ? splice_direct_to_actor+0x750/0x750 [ 35.739987] do_sendfile+0x4a1/0xb50 [ 35.740003] ? do_compat_pwritev64+0x170/0x170 [ 35.740017] ? SyS_futex+0x1b7/0x2b5 [ 35.740035] SyS_sendfile64+0x11f/0x140 [ 35.740043] ? SyS_sendfile+0x150/0x150 [ 35.740054] ? do_syscall_64+0x43/0x4b0 [ 35.740062] ? SyS_sendfile+0x150/0x150 [ 35.740070] do_syscall_64+0x19b/0x4b0 [ 35.740084] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 35.740089] RIP: 0033:0x44a449 [ 35.740093] RSP: 002b:00007f61637b0ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000028 [ 35.740100] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 000000000044a449 [ 35.740104] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005 [ 35.740108] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 35.740112] R10: 0000000002000005 R11: 0000000000000206 R12: 00000000006dbc4c [ 35.740117] R13: 00007fffa4e94f1f R14: 00007f61637b19c0 R15: 00000000006dbd4c [ 35.757025] Kernel Offset: 0x19000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 36.131857] Rebooting in 86400 seconds..