[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.189486] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 30.526592] random: sshd: uninitialized urandom read (32 bytes read) [ 31.000524] random: sshd: uninitialized urandom read (32 bytes read) [ 31.529540] random: sshd: uninitialized urandom read (32 bytes read) [ 31.655513] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.201' (ECDSA) to the list of known hosts. [ 37.093793] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program [ 37.176551] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.921906] ================================================================== [ 47.929349] BUG: KASAN: slab-out-of-bounds in do_error_trap+0x3b6/0x4d0 [ 47.936087] Read of size 8 at addr ffff8801c0ce3cb0 by task syz-executor113/9480 [ 47.943605] [ 47.945228] CPU: 1 PID: 9480 Comm: syz-executor113 Not tainted 4.18.0-rc3+ #57 [ 47.952568] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.962164] Call Trace: [ 47.964725] [ 47.966335] Allocated by task 2164292896: [ 47.970472] BUG: unable to handle kernel paging request at ffffffff8c433958 [ 47.977557] PGD 8e6d067 P4D 8e6d067 PUD 8e6e063 PMD 0 [ 47.982824] Thread overran stack, or stack corrupted [ 47.987905] Oops: 0000 [#1] SMP KASAN [ 47.991689] CPU: 1 PID: 9480 Comm: syz-executor113 Not tainted 4.18.0-rc3+ #57 [ 47.999025] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.008372] RIP: 0010:depot_fetch_stack+0x10/0x30 [ 48.013186] Code: e8 c5 2e 47 fe e9 b3 fd ff ff e8 bb 2e 47 fe e9 55 fd ff ff 90 90 90 90 90 90 89 f8 c1 ef 11 25 ff ff 1f 00 81 e7 f0 3f 00 00 <48> 03 3c c5 60 39 43 8b 8b 47 0c 48 83 c7 18 c7 46 10 00 00 00 00 [ 48.032360] RSP: 0018:ffff8801c0ce3a08 EFLAGS: 00010006 [ 48.037729] RAX: 00000000001fffff RBX: ffff8801c0ce3bc4 RCX: 0000000000000000 [ 48.044988] RDX: 0000000000000000 RSI: ffff8801c0ce3a10 RDI: 0000000000003ff0 [ 48.052240] RBP: ffff8801c0ce3a38 R08: ffff8801b2632440 R09: ffffed003b5e3ec2 [ 48.059499] R10: ffffed003b5e3ec2 R11: ffff8801daf1f617 R12: ffff8801c0ce2bc0 [ 48.066750] R13: ffff8801c0ce3cb0 R14: ffff8801da987dc0 R15: ffff8801c0ce3bc0 [ 48.074007] FS: 0000000000b43940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 48.082218] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.088080] CR2: ffffffff8c433958 CR3: 00000001ae01a000 CR4: 00000000001406e0 [ 48.095335] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.102588] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.109838] Call Trace: [ 48.112404] Modules linked in: [ 48.115582] Dumping ftrace buffer: [ 48.119097] (ftrace buffer empty) [ 48.122787] CR2: ffffffff8c433958 [ 48.126227] ---[ end trace 3b9527e7dfd4d0bc ]--- [ 48.131064] RIP: 0010:depot_fetch_stack+0x10/0x30 [ 48.135881] Code: e8 c5 2e 47 fe e9 b3 fd ff ff e8 bb 2e 47 fe e9 55 fd ff ff 90 90 90 90 90 90 89 f8 c1 ef 11 25 ff ff 1f 00 81 e7 f0 3f 00 00 <48> 03 3c c5 60 39 43 8b 8b 47 0c 48 83 c7 18 c7 46 10 00 00 00 00 [ 48.155068] RSP: 0018:ffff8801c0ce3a08 EFLAGS: 00010006 [ 48.160414] RAX: 00000000001fffff RBX: ffff8801c0ce3bc4 RCX: 0000000000000000 [ 48.167666] RDX: 0000000000000000 RSI: ffff8801c0ce3a10 RDI: 0000000000003ff0 [ 48.174930] RBP: ffff8801c0ce3a38 R08: ffff8801b2632440 R09: ffffed003b5e3ec2 [ 48.182190] R10: ffffed003b5e3ec2 R11: ffff8801daf1f617 R12: ffff8801c0ce2bc0 [ 48.189454] R13: ffff8801c0ce3cb0 R14: ffff8801da987dc0 R15: ffff8801c0ce3bc0 [ 48.196707] FS: 0000000000b43940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 48.204916] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.210778] CR2: ffffffff8c433958 CR3: 00000001ae01a000 CR4: 00000000001406e0 [ 48.218031] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.225286] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.232541] Kernel panic - not syncing: Fatal exception [ 49.303363] Shutting down cpus with NMI [ 49.307818] Dumping ftrace buffer: [ 49.311339] (ftrace buffer empty) [ 49.315036] Kernel Offset: disabled [ 49.318642] Rebooting in 86400 seconds..